Instruction/ maintenance manual of the product 4000 Series, 4050 Series HP
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HP LaserJet 4000 and 4050 Series Printers Service Manual HP LaserJet 40 00 and 40 50 Series Prin ters Service Manual Printed on at least 50% T otal Recyc led Fiber with at least 10% P ost-Consumer P aper Copyright© 1999 He wlett-P ackard Co. Printed in USA Manual Part No.
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HP LaserJet 4000 and 4050 Ser ies Pr inters Ser vice Man ual _____________.
Hewlett-P ackard Company 11311 Chinden Boule v ard Boise, Idaho 83714 USA © Copyright He wlett - P ac kar d Company 1999 All Rights Reser v ed. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the cop yright laws .
Contents - 1 Contents 1 Printer Description Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Identification .
Contents-2 3 Printer Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Control Panel Layout . . .
Contents-3 5 Functional Information Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Power Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 AC/DC Power Distribution .
Contents-4 6 Removing and Replacing Parts Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Removal and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . 6-2 Tools . . . . . . . . . .
Contents-5 7 Troubleshooting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Troubleshooting Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Troubleshooting Flowchart . .
Contents-6.
Overview 1-1 1 Pr inter Descr iption Overview This chapter discusses the f ollowing: ● Printer Features ● Identification ● Site Requirements ● P aper Specifications ● Saf ety Information.
1-2 Printer Description Printer Features T able 1-1. Printer Features f or the HP LaserJet 4000 Series Printer Speed 17 pages per minute (ppm) 100 MHz RISC microprocessor First page out = 15 sec.
Printer Features 1-3 P aper T ra ys 100-sheet T ra y 1 ● Size: 3 b y 5 in to legal (76 by 127 mm to 216 b y 356 mm) 500-sheet T ra y 2 (HP LaserJet 4000/ 4000 N) ● Size: letter , legal, A4 250-she.
1-4 Printer Description T able 1-2. Printer Features f or the HP LaserJet 4050 Series Printer Speed 17 pages per minute (ppm) 133 MHz RISC microprocessor First page out = 15 sec.
Printer Features 1-5 P aper T ra ys 100-sheet T ra y 1 ● Size: 3 b y 5 to legal (76 by 127 mm to 216 b y 356 mm) 500-sheet T ra y 2 (HP LaserJet 4050/ 4050 N) ● Size: letter , legal, A4 250-sheet .
1-6 Printer Description T able 1-3. Comparison of HP LaserJet 4000 Series Printer s HP LaserJet 4000 HP LaserJet 4000 T HP LaserJet 4000 N HP LaserJet 4000 TN Ether net 10-T/ 10-2 LocalT alk optional optional standard standard Max.
Printer Features 1-7 T able 1-4. Comparison of HP LaserJet 4050 Series Printer s HP LaserJet 4050 HP LaserJet 4050 T HP LaserJet 4050 N HP LaserJet 4050 TN Ether net 10-T/ 10-2 LocalT alk optional optional optional optional 10/100 Base TX optional optional standard standard Max.
1-8 Printer Description Identification Model and Serial Number s The model number and printer ser ial n umber are listed on an identification label located under the top cov er on the right side of the printer . The model number is alphan umeric, such as C4253A f or the HP LaserJet 4050 N pr inter .
Site Requirements 1-9 Site Requirements The f ollowing en vironmental specifications must be maintained to ensure the proper operation of the printer . Consider the follo wing points bef ore installing the pr inter : ● Install in a well-v entilated, dust-free area.
1-10 Printer Description Space Requirements Figure 1-2 Printer Dimensions Printer W eight (without T oner Car tridge) ● HP LaserJet 4000/4000 N and 4050/4050 N printers: 39.27 lb (17.85 kg) ● HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN printers: 45.
Site Requirements 1-11 En vironmental Requirements T able 1-6. Printer and T oner Car tridge En vironmental Conditions Item Operating Storage T emperature 50-91 ° F (10-32 ° C) 32 to 95° F (0 to 35°C) Relativ e Humidity 20-80% RH (with no condensation) 10% to 95% RH T able 1-7.
1-12 Printer Description P aper Specifications The f ollowing tab les show paper specifications f or the HP LaserJet 4000 and 4050 ser ies printer . * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. To print custom-size paper see the user’s guide.
Paper Specifications 1-13 * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** To print custom-size paper see the user’s guide.
1-14 Printer Description * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** To print custom-size paper see the user’s guide.
Paper Specifications 1-15 * The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. Suppor ted T ypes of P aper The printer suppor ts the f ollowing types of paper : T able 1-12.
1-16 Printer Description Guidelines f or Using P aper F or best results, use conv entional 20 lb (75 g/m 2 ) paper . Make sure the paper is of good quality and free of cuts, nic ks , tears , spots , loose par ticles, dust, wrinkles, v oids, and curled or bent edges.
Paper Specifications 1-17 Note Do not use letterhead paper that is printed with low-temperature inks , such as those used in some types of ther mogr aphy .
1-18 Printer Description P aper W eight Equivalence T able Use this tabl e to deter mine appro ximate equiv alent points in weight specifications other than U .S. bond w e ight. F or e xample, to deter mine the equiv alent of 20 lb U .S. bond w eight paper in U .
Paper Specifications 1-19 Labels CA UTION T o av oid damaging the pr inter , use only labels recommended f or use in laser printers. If y ou hav e prob lems printing labels, use T ra y 1 and open the Rear Output Bin. Ne ver print on the same sheet of labels more than once.
1-20 Printer Description En velopes En velope Construction Env elope construction is cr itical. En velope f old lines can vary considerab ly , not only between manuf acturers, b ut also within a box from the same manuf acturer . Successful pr inting on env elopes depends upon the quality of the env e lopes .
Paper Specifications 1-21 En velopes with Double Side Seams Some env elopes ha v e ver tical seams at both ends of the env elope, rather than diagonal seams .
1-22 Printer Description En velope Margins The f ollowing tab le gives typical address margins f or a Commercial #10 or DL env elope. Note F or the best pr int quality , position margins no closer than 0.6 in (15 mm) from the edges of the env elope. En velope Storage Proper storage of en velopes helps contrib ute to good print quality .
Paper Specifications 1-23 Car d Stock and Hea vy P aper Many types of card stoc k can be pr inted from T ra y 1, including index cards and postcards. Some types of card stoc k perf or m better than others because the construction is better suited for f eeding through a laser printer .
1-24 Printer Description Safety Inf o rmation Laser Safety Statement The Center f or Devices and Radiological Health (CDRH) of the U .S. F ood and Dr ug Administration has implemented regulations f or laser products manuf actured since A ugust 1, 1976.
Safety Information 1-25 FCC Regulations This equipment has been tested and f ound to comply with the limits f or a Class B digital device , pursuant to P ar t 15 of the FCC rules. These limits are designed to provide reasonab le protection against har mful interf erence in a residential installation.
1-26 Printer Description Laser Statement f or Finland LASERTUR V ALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APP ARA T HP LaserJet 4000/4000 T/4000 N/4000 TN and 4050/4050 T/4050 N/4050 TN -laser kirjoitin on käyttäjän kannalta tur v allinen luokan 1 laser laite.
Safety Information 1-27 T oner Safety Note T oner ma y stain clothing. Skin and clothing are best cleaned by removing as m uch T oner as possible with a dry tissue, then w ashing with cold water . Hot water causes T oner to melt and permanently fuse into clothing.
1-28 Printer Description En vironmental Pr oduct Stewar dship Pr otecting the En vironment Hewlett-P ackard Compan y is committed to pro viding quality products in an environmentally-sound manner . The printer has been designed to minimize impacts on the en vironment.
Overview 2-1 2 Ser vice Approach Overview This chapter discusses the f ollowing: ● Ser vice Approach ● P ar ts and Supplies ● W arranty Statement.
2-2 Service Approach Service Approac h Repair of the printer nor mally begins with use of the pr inter’ s inter nal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a f aulty par t is located, repair is generally accomplished by assembly le vel replacement of Field Replaceab le Units (FR Us).
Parts and Supplies 2-3 P ar ts and Supplies Or dering Information Field replaceabl e and accessor y par t numbers are f ound in Chapter 8 of this manual. Replacement par ts ma y be ordered from HP’ s Service Materials Organization (SMO) or Suppor t Materials Europe (SME), divisions of Product Suppor t Division (PSD).
2-4 Service Approach Helpful Documentation T able 2-1 lists par t n umbers to order documentation. T able 2-1. Helpful Documentation Item Description or Use P ar t Number HP LaserJet Printer F amily P aper Specification Guide A guide to using paper and other print media with HP LaserJet printers.
Parts and Supplie s 2-5 Se r vice and Suppo r t CD- R OM f or the H P LaserJet 4050 P r inters An interacti v e training CD- R OM f or p r inter se r vice representati v es and customer care specialist s . C4251-60106 HP LaserJet 4000 and 4050 Se r ies P r inters Se r vice Manual A combined se r vice manual f or both se r ies of p r inter s .
2-6 Service Approach Phone Number s for Or dering ● SMO (Ser vice Materials Organization) 1-800-227-8164 (U .S. only) ● SME (Suppor t Mater ials Europe) (49 7031) 142253 Exchange Pr ogram HP off ers remanuf actured assemblies f or some par ts.
Parts and Supplies 2-7 HP Suppor t Assistant Compact Disc This suppor t tool off ers a comprehensive online inf or mation system designed to provide technical and product inf or mation on HP products. T o subscribe to the quar ter ly ser vice in the U .
2-8 Service Approach Eur ope, Middle East, and Africa A ustr ia 0660-8218 Belgium Dutch 0800 1 1906 F rench 0800 1 7043 Denmark 800-10453 European Inter national +31 20 681 5792 Finland 9800-13134 F r.
Parts and Supplies 2-9 T oner Car tridge Information The T oner Car tr idge is designed to simplify replacement of the major “consumabl e” par ts. The T oner Car tridge contains the pr inting mechanism and a supply of T oner .
2-10 Service Approach W arranty Statement The warr anty for this product giv es you specific legal rights. There ma y also be other r ights that v ar y from area to area. Refer to the user’ s documentation for the full w arranty and suppor ting warranty inf or mation.
Overview 3-1 3 Pr inter Operation Overview This chapter discusses the f ollowing: ● Using the Control P anel ● Control P anel Menus ● Ser vice Mode ● T esting the Printer ● Resetting the Pri.
3-2 Printer Operation Using the Contr ol P anel Contr ol P anel Lay out The printer’ s Control P anel consists of the f ollowing: Figure 3-1 Control P anel La yout Contr ol P anel Lights Ready Data Attention Menu Item – V alue + Select Go Cancel Job 2-line displa y READY 4050 only T able 3-1.
Using the Control Panel 3-3 Contr ol P a nel K eys T able 3-2. Control P anel Ke ys Ke y Function [Go] ● Places the printer either online or offline. ● Prints any data residing in the printer’ s buff er . ● Allows the printer to resume printing after being offline.
3-4 Printer Operation Settings and Defaults The printer makes most printing decisions based on either temporar y settings or per manent def aults. Note Settings sent from software applications o verride printer defaults . Setting the displa y langua ge 1 Press and hold [Select] while tur ning on the printer .
Control Panel Menus 3-5 Contr ol P anel Menus Press [Menu] f or access to all Control P anel menus . When additional tra ys or other accessories are installed in the printer , ne w menu items automatically appear . T o change a Control P anel setting: 1 Press [Menu] until the desired men u appears.
3-6 Printer Operation Quic k Copy Jobs Men u This menu pro vides a list of the quick cop y jobs stored on the printer’ s hard disk. The user can print or delete these jobs from the Control P anel. Note If there are no quick cop y jobs stored on the pr inter’ s hard disk, this menu is not displa yed on the Control P anel.
Control Panel Menus 3-7 Priv ate/Stored Jobs Menu This menu pro vides a list of the pr iv ate and stored jobs on the printer’ s hard disk. The user can pr int or delete these jobs from the Control P anel. Note If there are no private or stored jobs on the printer’ s hard disk, this menu is not displa yed on the Control P anel.
3-8 Printer Operation Inf ormation Menu This menu contains printer inf or mation pages that give details about the printer and its configuration. T o pr int an inf ormation page, scroll to the desired page and press [Select] .
Control Panel Menus 3-9 P aper Handling Menu When paper handling settings are correctly configured through the Control P anel, you can print by choosing the type and size of paper from the printer dr iv er or software application.
3-10 Printer Operation TRAY 1 TYPE= PLAIN F or suppor ted paper types see page 1 -12. This item appears only when TRAY 1 MODE= CASSETTE . Set the value to correspond with the paper type currently loaded in T ra y 1. TRAY 2 TYPE= PLAIN F or suppor ted paper types see page 1 -12.
Control Panel Menus 3-11 OVERRIDE A4/ LETTER=NO NO YES Choose YES to print on letter size paper when an A4 job is sent, but no A4 size paper is loaded in the printer (or to print on A4 size paper when a letter job is sent, but no letter paper is loaded in the printer).
3-12 Printer Operation Print Quality Menu Some items in this menu can be accessed from a softw are application, or from the printer dr iv er (if the appropr iate driver is installed). Printer dr iv er and software application settings ov err ide Control P anel settings.
Control Panel Menus 3-13 RET=MEDIUM OFF LIGHT MEDIUM DARK Use the printer’ s Resolution Enhancement technolog y (REt) setting to produce print with smooth angles, curves , and edges. REt does not aff ect pr int quality when the print resolution is set to ProRes 1200.
3-14 Printer Operation TONER DENSITY=3 1 2 3 4 5 Lighten or darken the print on the page by changing the T oner density setting. The settings range from 1 (light) to 5 (dark), but the def ault setting of 3 usually produces the best results. Use a low er T oner density setting to sav e T oner .
Control Panel Menus 3-15 Printing Menu Some items in this menu can be accessed from a softw are application, or from the printer dr iv er (if the appropr iate driver is installed). Printer dr iv er and software application settings ov err ide Control P anel settings.
3-16 Printer Operation UNIT OF MEASURE= INCHES (110V printers) or MILLIMETERS (220V printers) INCHES MILLIMETERS This item appears only when CONFIGURE CUSTOM PAPER=YES . Select the unit of measurement f or the custom paper size . X DIMENSION= 8.5 INCHES (110V printers) or 216 MILLIMETERS (220V printers) 3.
Control Panel Menus 3-17 PCL FONT SOURCE=INTERNAL INTERNAL SOFT SLOT 1, 2, OR 3 INTERNAL : Inter nal f onts. SOFT : P er manent soft f onts. SLOT 1 , 2 , or 3 : F onts stored in one of the three DIMM slots. Note It is best to set the f ont source from the printer dr iv er or software application.
3-18 Printer Operation PCL SYMB OL SET=PC- 8 PC- 8 many others Select any one of se ver al av ailable symbol sets from the printer’ s Control P anel. A symbol set is a unique grouping of all the characters in a f ont. PC-8 or PC-850 is recommended f or line draw characters .
Control Panel Menus 3-19 APPEND CR TO LF= NO NO YES Select YES to append a carriage retur n to each line f eed encountered in backw ard-compatible PCL jobs (pure te xt, no job control). Some environments , such as UNIX, indicate a new line using only the line f eed control code.
3-20 Printer Operation Configuration Menu Items in this menu aff ect the printer’ s behavior . Configure the printer according to y our printing needs.
Control Panel Menus 3-21 RESOURCE SAVE= OFF OFF ON AUTO Dedicate printer memor y to sav e each language’ s per manent resources . (Y ou might need to add memor y to the printer in order f or this item to appear .) The amount of memor y set aside can be diff erent for each installed language.
3-22 Printer Operation PAGE PROTECT= AUTO AUTO ON This item appears only after a 21 PAGE TOO COMPLEX, PRESS GO TO CONTINUE message displa ys. Memor y Enhancement technolog y (MEt) attempts to guarantee that all pages will print. If the page does not pr int, turn PAGE PROTECT to ON .
Control Panel Menus 3-23 TONER LOW=CONTINUE CONTINUE STOP Deter mine ho w the pr inter behav es when T oner is low . The TONER LOW message will first appear when the T oner Car tr idge is almost out of T oner . (About 100 to 300 sheets can still be printed.
3-24 Printer Operation J AM RECOVERY= AUTO AUTO ON OFF Deter mine ho w the pr inter behav es when a paper jam occurs. AUTO : The printer automatically selects the best mode f or pr inter jam recov er y (usually AUTO ). This is the def ault setting. ON : The printer automatically repr ints pages after a paper jam is cleared.
Control Panel Menus 3-25 QUICK COPY JO BS = 3 2 (HP LaserJet 4050 series pr inter with hard disk installed only) 1 to 50 Specifies the number of quic k copy jobs that can be stored on the printer’ s hard disk.
3-26 Printer Operation I/O Menu Items in the I/O (input/output) Menu aff ect the communication between the printer and the computer . T able 3-11. I/O Menu Item V alues Explanation I/O TIMEOUT=15 5 to 30 0 Select the I/O timeout per iod in seconds.
Control Panel Menus 3-27 PARALLEL HIGH SPEED=YES YES NO Select the speed at which data is transmitted to the printer . YES : The printer accepts faster par allel communications used f or connections with new er computers. NO : The printer accepts slower parallel communications used f or connections with older computers.
3-28 Printer Operation SERIAL ROB UST XON=ON ON OFF This item appears only when SERIAL PACING=XON/XOFF . Select the method f or generating XONs . ON : The printer sends an XON when the pr inter is online and when sufficient buff er space is av ailable .
Control Panel Menus 3-29 EIO Menu (Netw orked Printer s) EIO (enhanced input/output) Menus depend on the par ticular accessor y product installed in an EIO slot of the printer . If the printer contains an HP JetDirect print ser ver EIO card, y ou can configure basic networking parameters using the EIO Menu.
3-30 Printer Operation CFG TCP/IP=NO NO YES NO : The TCP/IP Menu is not accessib le. YES : The TCP/IP Menu appears . In the TCP/IP Menu, y ou can specify B OOTP=YES f or TCP/IP parameters to be automatically loaded from a bootp or DHCP ser v er when the printer is tur ned on.
Control Panel Menus 3-31 Resets Menu Use this menu with caution. Y ou can lose buff ered page data or printer configuration settings when you select these items . Only reset the printer under the follo wing circumstances: ● Y ou want to restore the printer’ s def ault settings.
3-32 Printer Operation Service Mode Ser vice Mode should be used only b y authorized ser vice personnel. While in Ser vice Mode, y ou can: ● V erify and set the page count and serial number . These are displa yed on the Configuration P age. ● Set the Cold Reset Def ault.
Service Mode 3-33 Service Menu Figure 3-2 Ser vice Menu Setting the P age Count, Maintenance Count, and Serial Number The page count and printer ser ial number are stored in non-v olatile memor y . If it is necessar y to replace the F or matter PCA, the page count should be set to the current v alue to reflect the age of the Pr int Engine.
3-34 Printer Operation P age Count The page count stored in NVRAM and displa y ed on the Configuration P age printout represents the number of pages which the pr inter has printed (excluding engine test prints).
Service Mode 3-35 Maintenance P age Count The maintenance page count should be reset only after a maintenance kit has been installed. This will reset the maintenance counter so that the message PERFORM PRINTER MAINTENANCE will displa y another 200,000 pages later (def ault).
3-36 Printer Operation MAINTENANCE COUNT in the Ser vice Mode Menu sets the page count inter v al at which the next service is due for the printer . This is set initially at the f actor y to 200,000 pages. (F or e xample, the message displa ys at 200,000 pages.
Testing the Printer 3-37 T esting the Printer When y ou print a Configuration P age, the printer checks its internal controller and I/O interf ace, and then prints a test page. Y ou can re view the Configuration P age pr intout to v er ify proper installation of such options as paper tra ys or printer languages.
3-38 Printer Operation Resetting the Printer Cold Reset Cold reset clears all data from the printer memor y and sets all the def aults back to the f actor y settings.
System Configuration 3-39 System Configuration MS-DOS System Configuration T o communicate properly with the printer , the MS-DOS environment requires the addition or modification of MODE commands in the A UT OEXEC.
3-40 Printer Operation Serial MS-DOS Commands Most IBM compatible computers def ault to a parallel printer por t. T o ensure that inf or mation is sent to the ser ial printer por t, type the f ollowing MS-DOS commands at the MS-DOS prompt, or include them in the A UT OEXEC.
Printer I/O Configuration 3-41 Printer I/O Configuration P arallel Menu The def ault setting f or the HIGH SPEED PARALLEL I/O is YES . If it is set to NO , the interf ace r uns at a slow er speed that is compatible with older computers. When the def ault is set to YES , the parallel interf ace runs at a higher rate suppor ted by ne wer computers.
3-42 Printer Operation P acing (Handshaking) P acing (or “handshaking”) is a type of communication between the printer and the computer . This is an impor tant setting in the pr inter because it allows the printer to tell the computer when to send inf or mation.
Overview 4-1 4 Pr inter Maintenance Overview This chapter discusses the f ollowing: ● Cleaning the Printer and Accessor ies ● Pre ventativ e Maintenance.
4-2 Printer Maintenance Cleaning the Printer and Accessories T o maintain high print quality and performance, thoroughly clean the printer and the paper handling accessor ies: ● Ev er y time y ou change the T oner Car tr idge (run a cleaning page). ● After printing approximately 10,000 pages .
Cleaning the Printer and Accessories 4-3 T able 4-1. Cleaning the Printer Component Cleaning Method / Notes Outside Cov ers Use a water-dampened cloth.
4-4 Printer Maintenance Using the Printer Cleaning P age If T oner specks appear on the front or bac k side of your print jobs, f ollow the procedure below . F rom the pr inter’ s Control P anel, do the f ollowing: 1 Press [Menu] until PRINT QUALITY MENU appears.
Preventative Maintenance 4-5 Pre ventative Maintenance The pre ventativ e maintenance cycle f or this pr inter is e very 200,000 pages. T o order the maintenance kit see page 8-2.
4-6 Printer Maintenance Expected Life of Components The f ollowing tab le shows the e xpected life of cer tain components in the printer . T o order par ts, see Chapter 8. T able 4-2. Life of Components for the HP LaserJet 4000 and 4050 Series Printer No.
Overview 5-1 5 Functional Inf or mation Overview This chapter presents a generaliz ed functional o v erview of the printer and the printing processes. This chapter discusses the f ollowing printer sys.
5-2 Functional Information P o wer Suppl y System A C/DC P ower Distrib ution A C power is supplied to the lo w-voltage po wer supply circuit in the Engine Controller Board when the pow er switch (SW1) is turned on. The low-v oltage pow er supply circuit supplies +24 VDC and +3.
Power Supply System 5-3 Over current Over v oltage Protection The Fusing Heater Saf ety Circuit is located on the Engine Controller Board, and constantly monitors the fusing temperature . In case of abnor mality , the output from this circuit tur ns off the relay (RL101) and interrupts the power to the fusing heater .
5-4 Functional Information High-v oltage P ower Distrib ution Figure 5-2 Engine Controller Board In response to the instructions from the microprocessor (CPU:IC 501) on the Engine Controller Board, th.
Power Supply System 5-5 T oner Car tridge Detection The T oner Car tr idge has a T oner sensor . The circuit compares the output v alue of the dev eloping A C bias and the output value from the antenna inside the Car tr idge , and outputs the T oner detection signal.
5-6 Functional Information Engine Contr oller System The f ollowing systems and functions are controlled b y the engine controller board: ● DC pow er distr ibution (+3.
Engine Controller System 5-7 Figure 5-3 Engine Controller Board.
5-8 Functional Information Engine Contr oller Board Inputs and Outputs Figure 5-4 Engine Controller Board I/O (1 of 4).
Engine Controller System 5-9 Figure 5-5 Engine Controller Board I/O (2 of 4).
5-10 Functional Information Figure 5-6 Engine Controller Board I/O (3 of 4).
Engine Controller System 5-11 Figure 5-7 Engine Controller Board I/O (4 of 4).
5-12 Functional Information Laser and Scanner Drive Based on inf or mation received from the F or matter , the Engine Controller Board sends signals to the Laser Scanner Assembly to modulate the Laser Diode on and off and to drive the Laser Scanner motor .
Engine Controller System 5-13 Motor s See “Timing Diagr am” on page 5-50 f or specific timing details for the printer motors. The Main Motor , MT1, is controlled by the Engine Controller Board.
5-14 Functional Information The Scanner Motor is controlled and monitored by the Engine Controller Board. It rotates the Scanner Mirror during the initial rotation period and the pr int period. The F an Motor is controlled and monitored by the Engine Controller Board.
Formatter System 5-15 Formatter System The F or matter PCA is responsible f or the follo wing: ● Controlling the P owerSa ve mode ● Receiving and processing print data from the various printer int.
5-16 Functional Information Note Printer error messages ov err ide the P o werSav e message. The printer will enter P owerSa ve mode at the appropriate time, b ut the error message will continue to be displa yed.
Formatter System 5-17 Input/Output P arallel Interface The F or matter PCA receiv es incoming data through its Bidirectional Interf ace (IEEE 1284). The I/O provides high speed and two w ay communication between the printer and the host, allowing the user to change printer settings and monitor pr inter status from the host computer .
5-18 Functional Information Disk The disk accessor y is mounted on the rear of the F or matter PCA. The optional greater than 1 GB EIO-based hard drive is used f or creating multiple original prints (mopies) and stor ing f or ms, f onts, and signatures.
Formatter System 5-19 Random Access Memory (RAM) The RAM contains the page and I/O buff ers and the f ont storage area. It stores printing and font inf or mation received from the host system, and can also ser v e to temporarily store a full page of print image data bef ore the data is sent to the print engine (see “P age Protect” below).
5-20 Functional Information P age Pr otect P age comple xity (r ules, comple x g raphics , or dense te xt) ma y exceed the printer’ s ability to create the page image f ast enough to keep pace with the image f or mation process.
Formatter System 5-21 PML PML is a Printer Management Language that allows remote configuration and status readbac k through the I/O por ts. Contr ol P a nel The F or matter PCA sends and receives printer status and command data via a Control P anel PCA.
5-22 Functional Information Image Formation System The image f or mation system is the main system in the pr inter . It consists of six stages: When the F or matter Board sends the pr int signal to th.
Image Formation System 5-23 Figure 5-9 Image F or mation System After the image has been transf erred to the paper , it is then fused onto the paper by heat and pressure at the Fuser .
5-24 Functional Information T oner Car tridge Figure 5-10 T oner Car tr idge A major por tion of the Image Formation System is contained in the Car tr idge as sho wn in the figure abov e. The T oner Car tr idge is the “hear t” of the Image F or mation System.
Image Formation System 5-25 Photosensitive Drum The special proper ties of the Photosensitive Drum allow an image to be f or med on the Drum surface and then tr ansferred to paper . The Drum is an aluminum cylinder . The outside of the cylinder is coated with a la yer of organic-photoconductiv e mater ial (OPC) which is non-to xic.
5-26 Functional Information Cleaning the Drum The cleaning blade is in contact with the surf ace of the Dr um at all times. As the Drum rotates during pr inting, e xcess T oner is stored in the waste T oner receptacle .
Image Formation System 5-27 Conditioning the Drum After the Drum is cleaned, it must be conditioned. This process consists of applying a unif or m negative charge on the surf ace of the Drum with the Pr imar y Charging Roller .
5-28 Functional Information Writing the Image During the wr iting process, a modulated Laser Diode projects the beam onto the rotating six-sided Scanning Mirror . As the mirror rotates, the beam reflects off the mirror , through a set of f ocusing lenses, through a slot in the rear of the T oner Car tridge, and onto the Photosensitiv e Dr um.
Image Formation System 5-29 De veloping the Imag e The de v eloping process de v elops the latent electrostatic image into a visible image on the Drum. The De v eloping Unit consists of a metallic cylinder that rotates around a fix ed magnetic core inside the T oner cavity .
5-30 Functional Information T ransferring the Image During the transf erring process the T oner image on the Drum surface is transf erred to the paper . A positive charge applied to the bac k of the paper by the tr ansfer roller causes the negativ ely charged T oner on the Drum surface to be attr acted to the page.
Image Formation System 5-31 Image Fusing/V ariable Fusing T emperature During the fusing process, the T oner is fused into the paper b y heat and pressure to produce a per manent image . The paper passes between a heated Fusing Roller and a soft Pressure Roller .
5-32 Functional Information V ariab le Fusing T emperature Figure 5-18 Fusing T emperature Control V ariable fusing temperature is a f eature that gives the user or service technician the ability to adjust the fusing temperature based on the media being used in the printer .
Paper Feed System 5-33 P aper Feed System Figure 5-19 P aper F eed Subsystem.
5-34 Functional Information Figure 5-20 P aper P ath The presence of paper in T ra y 1 is detected by the T r ay 1 P aper Sensor (PS105). Presence of paper in T ra y 2 is detected b y the T ra y 2 P a.
Paper Feed System 5-35 and by the six s witches (SW600, 601, 602, 603, 604, 605) on the P aper Size Detection PCA f or the HP LaserJet 4000 T , 4000 TN, 4050 T , and 4050 TN. While the Main Motor rotates, the T r ay 1 Pic kup Solenoid (SL102) is tur ned on, the T ra y 1 Pic kup Roller rotates, and a sheet of paper is f ed into the printer .
5-36 Functional Information Printing fr om T ra y 1 The presence of paper in T ra y 1 is detected by the T r ay 1 P aper Sensor (PS105). When the Engine Controller Board receiv es the /PRNT signal from the F or matter , the pr inter star ts the initial rotation phase.
Paper Feed System 5-37 Figure 5-22 T ra y 1 Pic kup.
5-38 Functional Information Printing fr om T ra y 2 When the F or matter inputs the /PRNT signal to the pr inter , the Main Motor (M1) star ts rotation. When the Main Motor reaches its prescribed speed, the Feed Roller Clutch (CL101) and T r ay 2 Pic kup Solenoid (SL 101 or SL 103) are tur ned on.
Paper Feed System 5-39 Figure 5-24 T ra y 2 Pic kup.
5-40 Functional Information Multi-Feed Prevention Mec hanism When f eeding paper from T ra y 2, the pr inter uses the Separation Roller to pre vent m ulti-feeding. Normally , the Separation Roller is impar ted with a rotational force in the same direction as the F eed Roller .
Paper Feed System 5-41 Printing fr om the Optional 500-sheet Universal T ra y The operation sequences of the P aper Feeder are controlled b y the P aper F eeder Dr iv er . A 4-bit microprocessor is used in the P aper F eeder Dr iv er , which controls the sequences of the P aper F eeder and the serial communication with the Engine Controller Board.
5-42 Functional Information Pic kup and Feeding The P aper F eeder picks up the paper from the installed tra ys and f eeds the paper to the pr inter . The flow of the paper is sho w n belo w .
Paper Feed System 5-43 The CPU on the Engine Controller Board monitors the conditions of the PS102 f or a prescribed per iod of time after the pick up star ts.
5-44 Functional Information En velope Feeder The operation sequences of the En velope F eeder are controlled by the Env elope F eeder Dr iv er . A 4-bit microprocessor is used in the Env elope F eeder Dr iv er , which controls the sequences of the Env elope F eeder and the ser ial communication with the Engine Controller Board of the printer .
Paper Feed System 5-45 is completed, the Env elope F eeder Dr iv er PCA receives the pic kup command from the Engine Controller Board and tur ns on the env elope pickup solenoid (SL901). The Pic kup Roller , F eed Roller and Separation Roller are rotated sequentially by the Main Motor rotation, and an env elope is pick ed up .
5-46 Functional Information Duple xer The operation sequences of the Duple x er are controlled by the Duple xer Driv er . A 4-bit microprocessor is used in the Duple xer Driver , which controls the sequences of the Duple xer and the serial communication with the Engine Controller Board.
Paper Feed System 5-47 Figure 5-31 P aper P ath f or the Duplex er.
5-48 Functional Information Figure 5-32 P aper F eed for the Duple xer P aper Jam There are f our photointerr upters (PS102, PS103, PS106, PS501) in the paper path f or detecting the presence of the paper .
Basic Sequence of Operation 5-49 Basic Sequence of Operation The F or matter PCA and the Engine Controller Board share inf or mation duri ng printer operation. The Interf ace PCA f or ms a link which operates as a serial data bus . This allows printer status, command, and dot-image data to be passed between the two PCAs .
5-50 Functional Information Figure 5-33 Timing Diagram.
Overview 6-1 6 Remo ving and Replacing P ar ts Overview This chapter discusses the f ollowing: ● Remov al and Replacement Strateg y ● Removing Co vers ● Removing Assemb lies ● Separating the E.
6-2 Removing and Replacing Parts Remo v al and Replacement Strateg y This chapter describes the complete disassembly of the printer . In e very instance, tasks that must be perf or med bef ore beginning the procedure are listed first. Remov e the assemblies in the order listed to pre vent damage during re-assembly .
Removal and Replacement Strategy 6-3 T ools ● Phillips #2 magnetized scre wdr iv er with 6-inch shaft ● Flat-blade scre wdriver with 6-inch shaft ● Needle-nose pliers ● P enlight Screws Used in the Printer All screws used in the printer are Phillips head, which require a Phillips screwdriv er .
6-4 Removing and Replacing Parts T able 6-1. Screws Used in the Printer Drawing and Description Purpose Threaded Phillips with captiv e star washer Used to f asten metal to metal when good electrical contact is needed. Silv er Self-tapping Phillips screw Used to f asten metal or plastic to plastic mainframes .
Removal and Replacement Strategy 6-5 Hint T o inser t self-tapping screws , tur n the screw to the left (counter-cloc kwise) until it clicks , then tur n it to the right (clockwise) until it is seated. If a self-tapping screw-hole strips, y ou must repair the screw -hole or replace the aff ected assembly .
6-6 Removing and Replacing Parts Remo ving Co vers It is usually best to remov e and replace the cov ers in the order shown. T ur n the printer off and unplug the power cord and an y cables . Hint Left and right are indicated as you f ace the front of the pr inter unless otherwise noted.
Removing Covers 6-7 T op Co ver Open the T op Cov er and remov e the T oner Car tr idge. CA UTION T o prev ent damage to the T oner Car tridge, do not e xpose it to light f or more than a f ew minutes .
6-8 Removing and Replacing Parts Contr ol P anel Figure 6-4 Removing the Control P anel 1 Using a flat-bl ade scre wdriv er , pr y each side of the Control P anel upward. 2 Remov e the top of the Control P anel from the tab . 3 Disconnect the ribbon cable from the Control P anel.
Removing Covers 6-9 T oner Car tridge Drive Arm Figure 6-5 Removing the T oner Car tridge Dr iv e Ar m 1 Remov e the T oner Car tr idge Drive Arm by using needle-nose pliers to pinch the pin from its hinge on the T op Cov er .
6-10 Removing and Replacing Parts Figure 6-6 Removing the T op Co ver 2 Remov e the f our screws holding the T op Cov er (two are behind the Rear Output Bin, near the top , and two are on top of the printer under the T op Cover).
Removing Covers 6-11 Figure 6-7 Releasing tabs to lift the T op Cov er 3 Squeeze the right front side of the T op Cov er to remov e it. It ma y be necessar y to use a small flat-b lade screwdriver to release the tab inside the small hole. 4 Holding the output assembly in place (located to ward the rear of the printer), remov e the T op Cov er .
6-12 Removing and Replacing Parts Left Side Co ver Figure 6-8 Removing the Left Side Co ver 1 Open T ra y 1. 2 Release the latch on the left side cov er from the inside of the printer .
Removing Covers 6-13 Fr ont Right Side Cover Figure 6-9 Removing the F ront Right Side Cov er 1 Release the latch at the top center of the cov er . 2 Lift the cov er straight up until it is free of the tabs at the bottom and the pow er switch rod, then pull it a wa y from the pr inter .
6-14 Removing and Replacing Parts Rear Co ver/Rear Output Bin Figure 6-10 Removing the Rear Co ver/Rear Output Bin 1 F acing the rear of the pr inter , pinch the r ight side of the Rear Output Bin and release the hinge from the slot. 2 Rotate the bin upward and slide it to the right to release the left hinge.
Removing Covers 6-15 Tr a y 1 Figure 6-11 Removing T r ay 1 from the F ront Cov er 1 Open T ra y 1. 2 Push outward on the tw o slot hinges to release the pins on T ra y 1. 3 Slide the F ront Cov er to the right and remov e it from the three hinges on the bottom.
6-16 Removing and Replacing Parts Figure 6-12 Removing the T r a y 1 Sensor Ar m Cov er 4 Fir mly pull both sides of the T ra y 1 Sensor Arm Cov er to w ard y ou until it releases from the shaft. See Figure 6-13, “Detail of the T ra y 1 Sensor Ar m Cov er ,” on page 6-17.
Removing Covers 6-17 Figure 6-13 Detail of the T ra y 1 Sensor Ar m Cov er Hint When y ou reinstall the T ra y 1 Sensor Ar m Cov er be sure the Sensor Ar ms mo v e freely .
6-18 Removing and Replacing Parts Remo ving Assemblies The order in which y ou replace the f ollowing assemb lies depends on the par t needing to be replaced. It is not necessar y to remov e ev er y assembly . Fuser W ARNING! Let the Fuser Assembly cool bef ore disassembly .
Removing Assemblies 6-19 Figure 6-15 Loosening the captiv e screws in the Fuser Assemb ly 3 Loosen the two captiv e screws on the Fuser Assemb ly . 4 Pull the Fuser Assembly str aight out of the pr inter .
6-20 Removing and Replacing Parts Formatter Cage Assembl y Figure 6-16 Removing the F or matter Cage Assemb ly 1 Print a Configuration P age. The inf or mation is necessar y to reconfigure the printer after you replace the F or matter . 2 Remov e the rear right side cov er (page 6-6).
Removing Assemblies 6-21 Output Assembl y Figure 6-17 Removing the Output Assemb ly 1 Remov e the T op Cov er (page 6-7). The Output Assembly is on the top , rear of the pr inter .
6-22 Removing and Replacing Parts 2 F acing the rear of the pr inter , release the 2 latches as follo ws: Figure 6-18 Left end of Output Assembly (br ass ar m) a On the left end of the assemb ly , rotate the brass arm up 90 ° . Figure 6-19 Right end of Output Assembly (white tab) b On the right end of the assembly , release the white tab .
Removing Assemblies 6-23 Laser Scanner Figure 6-20 Removing the Laser Scanner 1 Remov e the T op Cov er (page 6-7). The Laser Scanner is on the top of the printer , tilted tow ard the rear , and has a yello w label on it. 2 Unplug the 3 connectors as shown.
6-24 Removing and Replacing Parts Fa n Figure 6-21 Removing the F an 1 Remov e the T op Cov er (page 6-7) and the Left Side Cov er (page 6-12). The F an is on the left side of the pr inter . 2 Unplug the F an’ s connector to the Engine Controller Board.
Removing Assemblies 6-25 Main Motor Figure 6-22 Removing the Main Motor 1 Remov e the T op Cov er (page 6-7) and the F ront Right Side Co ver (page 6-13). The Main Motor is on the right front side of the printer . 2 Unplug the connector . 3 Remov e the 4 silv er screws around the corners of the metal plate.
6-26 Removing and Replacing Parts T ransfer Roller Figure 6-23 Removing the T r ansf er Roller 1 Open the T op Cov er and remov e the T oner Car tr idge. The T ransf er Roller is under neath the T oner Car tridge. CA UTION Do not touch the blac k r ubber par t of the roller .
Removing Assemblies 6-27 T ray 1 Pic kup Roller Figure 6-24 Removing the Pic kup Roller (shown with En velope Entr ance Cov er remov ed) 1 Open T ra y 1. The T ra y 1 Pickup Roller is in the center of the T ra y 1 Pickup Assemb ly . 2 Grasp the En v elope Entrance Cov er and pull it str aight aw a y from the printer .
6-28 Removing and Replacing Parts Figure 6-25 Detail of the T ra y 1 Pick up Roller.
Removing Assemblies 6-29 T ray 1 Pic kup Assembly 1 Remov e the cov ers (star ting on page 6-6): T op Cov er , Left Side Cov er , F ront Right Side Cov er , and T ra y 1.
6-30 Removing and Replacing Parts Figure 6-27 Removing the T r a y 1 Pickup Assemb ly – Right Side 5 Disconnect the solenoid cabl e on the right side of the T ra y 1 Pic kup Assemb ly .
Removing Assemblies 6-31 Figure 6-28 Removing the T r ay 1 Pic kup Assemb ly – Left Side 6 Unplug the connector to the Engine Controller Board on the left side of the T ra y 1 Pickup Assemb ly . 7 Remov e the long screw (4.8 in/116 mm) from the left side of the assembly .
6-32 Removing and Replacing Parts Figure 6-29 Removing the T r a y 1 Pickup Assemb ly – F ront Side 9 Remov e the 3 screws sho wn. 10 Lift the bl ack T oner Car tridge Guide on the r ight side of the assembly and pull the assemb ly straight out of the printer .
Removing Assemblies 6-33 Right Side T oner Car tridge Guide Y ou can lift aside the Right Side T oner Car tr idge Guide (instead of removing it) to access the Registr ation Assembly . It is not necessar y to unplug the connectors. Remov e the Right Side T oner Car tr idge Guide to access the Gear T rain.
6-34 Removing and Replacing Parts Registration Assembl y Figure 6-31 Removing the Registr ation Assembly 1 Remov e the f ollowing cov ers (star ting on page 6-6): T op Cov er , Left Side Cov er , F ront Right Side Cov er , and T ra y 1. Remov e the T ra y 1 pick up assembly (page 6-29).
Removing Assemblies 6-35 Figure 6-32 Detail of scre ws for the Registr ation Assembly CA UTION Do not remov e the silver scre w closest to the Registration Assembly! It holds the spring in place. T ake out the silv er scre w f ar ther from the registration assemb ly , the one that is under the green handle.
6-36 Removing and Replacing Parts P aper Feed Assembl y 1 Remov e the f ollowing cov ers (star ting on page 6-6): T op Cov er , Left Side Cov er , F ront Right Side Cov er , and T ra y 1. Remov e the T ra y 1 Pick up Assembly (page 6-29). The P aper F eed Assembly is on the front of the printer .
Removing Assemblies 6-37 Figure 6-34 Removing the upper scre ws from the P aper Feed Assemb ly 3 Remov e the 2 blac k upper screws . Hint After replacing the P aper F eed Assembly , make sure to inser t the 2 upper screws only . The 2 low er screws are f or holding the T r ay 1 Pic kup Assembly in place .
6-38 Removing and Replacing Parts Hint F or replacement of the P aper Feed Assemb ly , or ient the clutch properly by inser ting it into the slot, as shown.
Removing Assemblies 6-39 Formatter P an Figure 6-36 Removing the F or matter P an 1 Remov e the T op Cov er (page 6-7) and the F ront Right Side Co ver (page 6-13). Remov e the F ormatter Cage Assembly (page 6-20). The F or matter P an is on the r ight rear side .
6-40 Removing and Replacing Parts Gear T rain Figure 6-37 Removing the Gear T r ain 1 Remov e the f ollowing cov ers (star ting on page 6-6): T op Cov er , F ront Right Side Cov er , Rear Cov er/Rear Output Bin, and T ra y 1.
Removing Assemblies 6-41 Delivery Drive Assembl y Figure 6-38 Removing the Deliv er y Drive Assemb ly 1 Remov e the cov ers (star ting on page 6-6): T op Cov er , Left Side Cov er , F ront Right Side Cov er , Rear Cov er/Rear Output Bin, and T ra y 1.
6-42 Removing and Replacing Parts Separating the Engine Module fr om the P aper Feed Module This procedure is the same f or pr inters with a single 500-sheet T ra y or two 250-sheet T ra ys.
Separating the Engine Module from the Paper Feed Module 6-43 Figure 6-40 Separating the Engine from the P aper Feed Module 3 Remov e the single blac k, self-tapping screw from the left side of the printer , below the F an. CA UTION Lift the Engine carefully , being sure that all cables are disconnected.
6-44 Removing and Replacing Parts Engine Contr oller Board Note After y ou replace the Engine Controller Board, do not f orget to readjust the top margin as described on page 6-46.
Separating the Engine Module from the Paper Feed Module 6-45 F acing the front of the Engine Module: 3 Remov e 7 screws (sho wn in Figure 6-41 on page 6-44): • 4 b lack, self-tapping M4 scre ws (3 in front and 1 in the ri ght rear) • F rom the left rear , 3 M3 screws (1 recessed) 4 Disconnect the spring on the r ight side from the notch.
6-46 Removing and Replacing Parts Adjusting the T op Margin When you replace the Engine Controller Board, y ou must readjust the top margin as f ollows: Figure 6-43 Location of VR501 1 After setting the VR501 on the Engine Controller Board to the center position (0), load letter or A4 paper in the tra y .
Separating the Engine Module from the Paper Feed Module 6-47 Figure 6-44 Adjusting the top margin 2 Measure the distance between the edge of the paper and the print patter n. Measure all the test pr ints and calculate the avera g e. 3 Adjust VR501 so that the margin becomes .
6-48 Removing and Replacing Parts P aper Feed Roller s The f ollowing procedure is the same f or all HP LaserJet 4000 and 4050 series pr inters; there are 2 F eed Rollers for the HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN and one F eed Roller f or the HP LaserJet 4000/4000 N and 4050/4050 N pr inters.
Separating the Engine Module from the Paper Feed Module 6-49 Separation Roller s Figure 6-46 Removing the Separ ation Rollers The Separation Rollers are inside the paper tra ys. 1 Release the latch and lift the cov er inside the tra y . 2 Pinch the release at the left side of the Roller and slide it off the shaft.
6-50 Removing and Replacing Parts P aper Feed Module Plate Remov e the P aper Feed Module Plate to access the Controller PCA. This procedure is the same f or one 500-sheet T ra y or two 250-sheet Tr a y s . Figure 6-47 Removing the P aper Feed Module Plate 1 Remov e the 7 b lac k self-tapping scre ws (one of them is recessed in front).
Separating the Engine Module from the Paper Feed Module 6-51 P aper Feed Module Gear T rain Assembl y This procedure is the same f or one 500-sheet T ra y or two 250-sheet Tr a y s . Figure 6-48 Removing the Gear T r ain 1 Remov e the long recessed screw sho wn.
6-52 Removing and Replacing Parts P aper Feed Module Side Rails Remov e the P aper Feed Module side r ails to access the PCA Controller . This procedure is the same for one 500-sheet T r ay or tw o 250-sheet T ra ys.
Separating the Engine Module from the Paper Feed Module 6-53 Lower P aper Feed Module Plate (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-50 Removing the lo wer P aper F eed Module Plate 1 Remov e 9 blac k self-tapping screws . 2 Remov e 2 small blac k M3 screws .
6-54 Removing and Replacing Parts PCA Co ver (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) Figure 6-51 Removing the PCA Co ver (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN) 1 Pinch the left and right sides of the PCA Cov er to release it from the side latches.
Separating the Engine Module from the Paper Feed Module 6-55 PCA Co ver (HP LaserJet 4000/4000 N and 4050/4050 N) Figure 6-52 Removing the PCA Co ver (HP LaserJet 4000/4000 N and 4050/4050 N) 1 Release the latches shown.
6-56 Removing and Replacing Parts PCA Contr oller This procedure is the same f or one 500-sheet T ra y or two 250-sheet Tr a y s . Figure 6-53 Removing the PCA Controller 1 Unplug 3 connectors to the PCA Controller . 2 Unclip the left side of the PCA Controller and remov e it.
Overview 7-1 7 T roub leshooting Overview This chapter discusses the f ollowing: ● T roub leshooting Process ● T roub leshooting the Printing System ● Ref erence Diagrams.
7-2 Troubleshooting T r oubleshooting Pr ocess The troubl eshooting process is a systematic approach that addresses the major problems first, and then other prob lems as you identify the causes f or pr inter malfunctions and errors.
Troubleshooting Process 7-3 General P aper P ath T roubleshooting (page 7-45) Is there a paper jam in the printer? This section giv es information about solving problems in the paper path.
7-4 Troubleshooting T r oub leshooting Flowc har t Figure 7-1 T roub leshooting Flowchar t (1 of 2).
Troubleshooting Process 7-5 T r oub leshooting Flowc har t (Continued) T roub leshooting Flowchar t, continued.
7-6 Troubleshooting T r oubleshooting the Printing System Preliminary Operating Checks Prior to troubleshooting a specific printer problem, y ou should ensure that: ● The printer is being maintained on a regular basis as descr ibed in Chapter 4.
Troubleshooting the Printing System 7-7 Po w e r O n Note It is impor tant to hav e the pr inter’ s Control P anel functional as soon as possibl e in the troubleshooting process so that the printer’ s diagnostics can assist in locating printing errors.
7-8 Troubleshooting Note The F an only operates dur ing initial po wer on and while pr inting, unless the temperature inside the printer is too high. If the temperature is too high, the F an tur ns on to cool the inside of the pr inter .
Troubleshooting the Printing System 7-9 T able 7-3. No A C P ower Cause Action No correct v oltage present at the outlet. Plug the pow er cord into another AC circuit outlet. Inf or m the customer that the correct line v oltage is not av ailable at the outlet.
7-10 Troubleshooting T able 7-4. No DC P ower Cause Action No A C power is supplied. Check the A C power supply . See T able 7-3, “No A C P ower ,” on page 7-9 The ov ercurrent/ov er voltage detection circuit activ ated.
Troubleshooting the Printing System 7-11 Engine T e st The printer has one test patter n (ver tical lines). When an image def ect appears, a test print can be made to identify the problem. The test print can be made by pressing the test print switch located on the left side of the printer (see Figure 7-2 on page 7-12).
7-12 Troubleshooting Figure 7-2 Location of the Engine T est Button Printing an Engine T est T o print an engine test, use a non-metallic object (such as a pencil) to press the engine test button. A single test page with v er tical lines prints. T o print multiple test pages, hold down the engine test b utton.
Troubleshooting the Printing System 7-13 Event Log Use the Ev ent Log to diagnose and troubleshoot printer errors and inter mittent f ailures. Y ou can either displa y or print the Event Log. Access the Ev ent Log from the Control P anel’ s Information Menu.
7-14 Troubleshooting Figure 7-3 Sample Ev ent Log Most recent error (up to 30).
Troubleshooting the Printing System 7-15 Displa y the Event Log If the printer cannot pr int or mov e any paper , f ollow these steps to displa y the Event Log. Otherwise , pr int the e vent log. 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until SHOW EVENT LOG appears .
7-16 Troubleshooting Interpret the Event Log The Ev ent Log is the ke y tool in troubleshooting printer problems . Figure 7-3 shows a typical Ev ent Log. The Ev ent Log shows the current page count at the top left of the page with the printer’ s serial number directly to the right of the page count.
Troubleshooting the Printing System 7-17 Printer Messages The f ollowing tab les explain messages that might displa y on the printer’ s Control P anel. Alphabetical pr inter messages and their meanings are listed in T able 7-5, and n umerical pr inter messages are listed in T able 7-6.
7-18 Troubleshooting T able 7-5. Alphabetical Printer Messages Contr ol P anel Message Event Log Message Explanation Recommended Action ACCESS DENIED MENUS LOCKED The Control P anel function you are trying to access has been lock ed by the netw or k administrator to pre vent unauthorized access.
Troubleshooting the Printing System 7-19 CHOSEN LANGUAGE NOT AVAILAB LE A print job requested a printer language that does not e xist in the pr inter . The job will not print and will be cleared from memor y . 1. Print the job using a driver f or a diff erent pr inter language, or add the requested language to the printer (if av ailable).
7-20 Troubleshooting DISK IS WRITE PROTECTED The EIO disk is protected, and no new files can be written to it. Disable the write protection through HP JetAdmin. EIO n DISK I NIT IALI ZING The disk accessor y card takes a long time to initialize . The first parameter is the accessor y slot number f or this disk accessor y card.
Troubleshooting the Printing System 7-21 ENV FEEDER LOAD [TYPE] [SIZE] There is no env elope in the f eeder , the wrong size is loaded in the f eeder , or the type and size is set incorrectly in the Control P anel. 1. Load the requested env elope type and size into the Env elope F e eder .
7-22 Troubleshooting FLASH IS WRITE PROTECTED The flash DIMM is protected, and no new files can be written to it. Disable the write protection through HP JetAdmin. IN ITIALIZIN G If the message displays continually , a DIMM ma y not be inser ted completely .
Troubleshooting the Printing System 7-23 LOADING PROGRAM <NUMB ER> alter nates with DO NOT POWER OFF Programs and f o nts can be stored on the printer’ s file system. At bootup time these entities are loaded into RAM. (These entities can take a long time to load into RAM depending on the size and nu mber of entities being loaded.
7-24 Troubleshooting MEMORY SETTINGS CHANGED The printer changed its memor y settings because it did not hav e enough memor y to use the pre vious settings for I/O Buff er ing and Resource Saving. This usually occurs after removing memor y from the printer , adding a Duple xer , or adding a printer language.
Troubleshooting the Printing System 7-25 RAM DISK DEVICE FAILURE The RAM disk had a critical failure and can no longer be used. 1. T ur n the printer off, and then tur n the printer on to clear the message. 2. If the message persists, install a new RAM disk.
7-26 Troubleshooting TRAY X EMPTY The specified tra y is empty , but the current job does not need this tra y in order to print correctly . If this message appears and the tra y contains paper , a sensor could be damaged. PS101 detects paper in Tr a y 2 .
Troubleshooting the Printing System 7-27 TRAY X LOAD [TYPE] [SIZE] One of the f ollowing occurred: There is no paper loaded in the specified tra y , or the paper is not the size requested, or the Control P anel is not set for the size of paper loaded.
7-28 Troubleshooting UNAB LE TO MOPY J OB Memor y or file system f ailures would not allow a mop y job to occur . Only one cop y will be produced. UNS UPPORTED SI Z E I N TRAY [ YY] An e xter nal paper handling de vice detected an unsuppor ted paper size .
Troubleshooting the Printing System 7-29 T able 7-6. Numerical Printer Messages Contr ol P anel Message Event Log Message Explanation Recommended Action 13.XX PAPER J AM [LOCATION] P aper is jammed at the specified location (and possibly at other locations).
7-30 Troubleshooting 13.5 PAPER J AM 13.5 P aper delay jam at Fuser . For 13.5 and 13.6 : 1. Check the T ransf er Roller and Small Media Belt to ensure they are operating and can f eed paper . 2. Check the paper path f or obstr uctions at the T ransf er Roller , T oner Car tridge, P aper Feed Guide, and Fuser .
Troubleshooting the Printing System 7-31 20 INSUFFICIENT MEMORY alter nates with PRESS GO TO CONTINUE The printer received more data than can fit in its av ailable memory . Y ou might hav e tried to transf er too many macros, soft f onts, or comple x graphics.
7-32 Troubleshooting 22 PARALLEL I/O B UFFER OVERFLOW alter nates with PRESS GO TO CONTINUE T oo much data was sent to the parallel por t. This error can occur if the driver y ou are using is not IEEE-1284 compliant. F or best results, use an HP driver that came with the printer .
Troubleshooting the Printing System 7-33 40 BAD SERIAL TRANSMISSION alter nates with PRESS GO TO CONTINUE The printer encountered an error while transf err ing data from the computer . The error might hav e occurred f or sev eral reasons: The computer was turned on or off while the printer was online .
7-34 Troubleshooting 41.3 UNEXPECTED PAPER SIZE The paper size y ou are tr ying to print is not the same as the settings f or the tra y . 1. Make sure that all tr ays are correctly adjusted f or size . (The pr inter will continue trying to pr int the job until size settings are correct.
Troubleshooting the Printing System 7-35 50 .X FUSER ERROR A Fuser error has occurred. X Description: 1 = Low Fuser temperature 2 = Fuser warm up ser vice 3 = High Fuser temperature 4 = Low/Bad line v oltage.
7-36 Troubleshooting 51.X PRINTER ERROR A loss of beam detect occurred. X Description: 1 = Beam detect error 2 = Laser error 1. Press [Go] . The page containing the error will automatically be reprinted. 2. T ur n the printer off and then on. 3. Reseat cables .
Troubleshooting the Printing System 7-37 53.XY.ZZ PRINTER ERROR There is a memor y error with an accessor y . The DIMM that caused the error will not be used.
7-38 Troubleshooting 55 PRINTER ERROR alter nates with PRESS GO TO CONTINUE An inter nal communications error occurred. 1. Press [Go] . The page containing the error will automatically be reprinted. 2. Check the po wer at the customer’ s location. 3.
Troubleshooting the Printing System 7-39 59 .X PRINTER ERROR A printing error occurred. X Description: 0 = Motor error 1 = Motor star tup error 2 = Motor rotation error 1.
7-40 Troubleshooting 68 NVRAM ERROR CHECK SETTINGS An error occurred in the printer’ s nonv olatile memor y (NVRAM) and one or more printer settings has been reset to its f actor y default. 1. Print a Configuration P age and check the printer settings to deter mine which v alues hav e changed.
Troubleshooting the Printing System 7-41 79 .XXXX PRINTER ERROR The printer detected an error . The numbers ( XXXX ) indicate the specific type of error . 1. T ur n the printer off, and then tur n the printer on. 2. T r y pr inting a job from a diff erent software application.
7-42 Troubleshooting 8X.YYYY The EIO accessor y in slot X has encountered a critical error as specified by YYYY . X Description: 1 = EIO slot 1 – The printer detected an error with the EIO card. 2 = EIO slot 2 – The printer detected an error with the EIO card.
Troubleshooting the Printing System 7-43 The f ollowing tab le lists the disk error numbers repor ted on either the Printer Collation or Job Storage Disk Error page, which is printed when an error exists . T able 7-7. Mopy Disk Err or Messages Disk Err or Number Err or Description Solution 1 Disk v olume not present – it ma y be uninitialized.
7-44 Troubleshooting 59 The maximum n umber of directories has been reached There is a maximum n umber of director ies that can be put on a disk. Stored jobs are stored in directories created for each user . T o solve this problem: • Delete all jobs stored for a user .
Troubleshooting the Printing System 7-45 General P aper P ath T r oubleshooting P aper jams occur in the printer when paper does not either reach or clear a photosensor along the printer’ s paper path in a specific amount of time. If a paper jam occurs , a 13.
7-46 Troubleshooting There are f our photosensors (PS102, PS103, PS106, PS501) in the paper path f or detecting arr iv al or passing of the paper . If the paper does not reach or pass these sensors within the prescribed time, the microprocessor on the Engine Controller Board assesses a paper jam and notifies the F or matter of the jam.
Troubleshooting the Printing System 7-47 P aper P ath T est T o perf or m a P aper P ath T est: 1 Press [Menu] until INFORMATION MENU appears. 2 Press [Item] until PRINT PAPER PATH TEST appears. 3 Press [Select]. 4 Press [+] to cycle selections until the desired paper tra y appears.
7-48 Troubleshooting Inf ormation P ages F rom the pr inter’ s Control P anel y ou can print pages that give details about the printer and its current configuration.
Troubleshooting the Printing System 7-49 Figure 7-5 Sample Menu Map (4000 series printer).
7-50 Troubleshooting Figure 7-6 Sample Menu Map (4050 series printer).
Troubleshooting the Printing System 7-51 Configuration P age Use the Configuration P age to view current printer settings, to help troubleshoot printer prob lems, or to v er ify installation of optional accessories, such as memor y (DIMMs), paper tra ys, and printer languages.
7-52 Troubleshooting Figure 7-7 Sample Configuration P age (4000 ser ies printer) Printer Information Lists the serial number , HP JetSend IP addresses, page counts , and other inf or mation for the printer . Memory Lists printer memor y , PCL Driver w or k space (D WS), and I/O b uff ering and resource saving inf or mation.
Troubleshooting the Printing System 7-53 Figure 7-8 Sample Configuration P age (4050 ser ies printer) Printer Information Lists the serial number , HP JetSend IP addresses, page counts , and other inf or mation for the printer . addresses, page counts , and other inf or mation for the printer .
7-54 Troubleshooting V erify Installed Options Under “Installed P ersonality” on the Configuration P age, look f or options such as hard disk or DIMM types and sizes . V erify that the options which are installed in the printer are reflected on the Configuration P age.
Troubleshooting the Printing System 7-55 Chec k the T oner Cartridg e Image f or mation def ects are often the result of problems with the T oner Car tr idge . If there is any doubt, alw ays replace the T oner Car tr idge bef ore troubleshooting image def ects.
7-56 Troubleshooting Note T oner Car tr idges are rated f or 6,000 or 10,000 images at 5% cov erage (depending on the model). It is possible to w ear out the gears and the car tr idge seals bef ore TONER LOW is display ed if the number of images e xceeds 6,000 or 10,000 (depending on the model).
Troubleshooting the Printing System 7-57 Image Defects The quality of the printer’ s output is subject to the judgment of the user . This section of the manual helps you define print quality def ects and understand what f actors aff ect print quality .
7-58 Troubleshooting Hint If you find a def ect that is not depicted, record the probable cause along with the conditions in the printing environment and sa v e a cop y of the def ect for future ref erence. T able 7-11. Black P age P ossible Cause Action The high-v oltage powe r supply connections are contaminated.
Troubleshooting the Printing System 7-59 T able 7-12. Blank Pa g e P ossible Cause Action No T oner is av ailable fo r p r i n t . Remov e sealing tape or replace the T oner Car tr idge. Def ective laser shutter . Chec k the laser shutter f or free operation when inser ting the T oner Car tridge.
7-60 Troubleshooting T able 7-13. Blank Spots P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y .
Troubleshooting the Printing System 7-61 T able 7-14. Creases P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y .
7-62 Troubleshooting T able 7-15. Curl P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y . Also tr y rotating the paper 180°.
Troubleshooting the Printing System 7-63 T able 7-16. Contamination on Back P ossible Cause Action Contamination inside printer (T ra y Separation Roller , F eed Roller , T ransf er Roller , Fuser , T oner Car tridge). 1. Print at least 10 pages to see if the problem goes away .
7-64 Troubleshooting T able 7-17. Distor ted Image P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y .
Troubleshooting the Printing System 7-65 T able 7-18. Dropouts P ossible Cause Action P aper might be too smooth. Check the paper (or other print media) type and quality . Printer’ s operating environment does not meet specifications. Make sure the printer’ s operating en vironment meets specifications.
7-66 Troubleshooting T able 7-20. Gray Bac kground P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y .
Troubleshooting the Printing System 7-67 T able 7-21. Horizontal Black Lines P ossible Cause Action Def ective Laser Scanner Assembly or Engine Controller Board. 1. See the “Repetitiv e Def ect Ruler” on page 7-73. 2. Reseat connectors on the Laser Scanner and Engine Controller Board.
7-68 Troubleshooting T able 7-24. Light Print, Dark Print, or Fade P ossible Cause Action Wrong T oner density setting. F rom the print quality menu on the Control P anel, adjust the T oner density setting. Make sure EconoMode is off . T oner Car tr idge is low .
Troubleshooting the Printing System 7-69 T able 7-25. Loose T oner P ossible Cause Action Contamination in the printer . 1. Pr int a f ew more pages to see if the prob lem corrects itself . 2. Clean the inside of the printer (page 4-2) or use the printer’ s cleaning page (page 4-4).
7-70 Troubleshooting T able 7-27. Skew P ossible Cause Action P aper does not meet printer specifications or is stored improperly . 1. Print a fe w more pages to see if the problem corrects itself . 2. T ur n ov er the stack of paper in the tra y . Also tr y rotating the paper 180°.
Troubleshooting the Printing System 7-71 T able 7-29. T oner Spec ks P ossible Cause Action Contamination in printer . 1. Pr int a f ew more pages to see if the prob lem corrects itself . 2. Clean the inside of the printer (page 4-2) or use the printer’ s cleaning page (page 4-4).
7-72 Troubleshooting T able 7-31. V er tical Dots P ossible Cause Action Contaminated Static Eliminator teeth. Clean the Static Eliminator . P oor contact between the Static Eliminator and the Engine Controller Board. Clean the contacts, if contaminated.
Troubleshooting the Printing System 7-73 Repetitive Defect Ruler Repetitiv e pr int def ects are usually associated with a specific roller within the printer or the T oner Car tridge. Use Figure 7-9 to isolate the cause of repetitiv e pr int def ects.
7-74 Troubleshooting Image System T r oubleshooting Half Self T est Functional Chec k The electrophotogr aphic process can be subdivided into the f ollowing stages: ● Cleaning (remov es e xcess T on.
Troubleshooting the Printing System 7-75 Drum Rotation Functional Chec k The Photosensitiv e Drum, located in the T oner Car tr idge , m ust rotate f or the pr int process to work. The Photosensitiv e Dr um receiv es its drive from the Main Driv e Assembly .
7-76 Troubleshooting High-v oltage P ower Suppl y Functional Check The High-v oltage P ower Supply Assemb ly provides the necessar y v oltages for the printer’ s electrophotographic processes. The +24B VDC supply is used to pow er the High-voltage P ower Supply Assembly .
Troubleshooting the Printing System 7-77 Interface T r oub leshooting This section provides an o ver vie w of the pr inter’ s interf ace requirements. Comm unications Check Note Communication prob lems are nor mally the customer’ s responsibility .
7-78 Troubleshooting Figure 7-10 Sample JetDirect Configuration P age (4000 ser ies printer) Network statistics I/O card status IP address Node name Nov ell status.
Troubleshooting the Printing System 7-79 Sample JetDirect Configuration P age (4050 ser ies printer).
7-80 Troubleshooting HP JetDirect Configuration ● If the HP EIO JetDirect Card has successfully pow ered up and completed its inter nal diagnostics , the I/O CARD READY message appears. If comm unication is lost, an I/O NOT READY message appears f ollowed b y a two-digit error code.
Troubleshooting the Printing System 7-81 A UT OEXEC.B A T Standar d Configurations P arallel DOS Commands If the pre vious check did not produce the desired result, ensure that the A UT OEXEC .BA T file contains the f ollowing statements f or parallel interf ace communications: MODE LPT1: , , P F or MS-DOS version 4.
7-82 Troubleshooting Comm unications Checks T able 7-34. Communications Chec ks Chec ks Action Is your computer configured to the parameters described in the configuration instructions? These parameters are required to communicate with the printer . V erify that the configuration of the computer's communications por t matches these parameters.
Troubleshooting the Printing System 7-83 If the host system and printer still are not communicating and you hav e addressed the issues in T able 7-34, replace the F or matter PCA and the EIO card and reconfigure the printer . If the problem persists , a protocol analyzer ma y be needed to find the source of the problem.
7-84 Troubleshooting Reference Dia grams Locations of Components Figure 7-11 Components of the P aper Pick up and Feed System (HP LaserJet 4000/4000 N and 4050/4050 N).
Reference Diagrams 7-85 T able 7-35. Components in Figure 7-11 PS101 T ra y 2 P aper Out Sensor PS102 Pre-F eed Sensor PS103 T op of P age Sensor PS104 T op Output Bin Full Sensor PS105 T ra y 1 P ape.
7-86 Troubleshooting Figure 7-12 Components of the P aper F eed System (HP LaserJet 4000/4000 N and 4050/4050 N with Optional 500-sheet Universal T r a y Assembly).
Reference Diagrams 7-87 Figure 7-13 Components of the Duple x er.
7-88 Troubleshooting Figure 7-14 Components of the Fusing and Deliv er y Unit.
Reference Diagrams 7-89 Figure 7-15 Components of the En velope F eeder.
7-90 Troubleshooting P aper P ath Figure 7-16 P aper P ath (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN Shown) Figure 7-17 P aper P ath with the Duple xer.
Reference Diagrams 7-91 Figure 7-18 P aper P ath with the Env e lope F eeder.
7-92 Troubleshooting Figure 7-19 P aper Sensors and the P aper P ath T able 7-36. Paper Sensor s in Figure 7-19 PS102 Pre-Feed Sensor Sensor and flag located on Registration/F eed Sensor Assembly . PS103 T op of P age Sensor Sensor and flag located on Registration/F eed Sensor Assembly .
Reference Diagrams 7-93 Engine Contr oller Board Figure 7-20 Engine Controller Board La yout T able 7-37. Engine Controller Boar d Lay out SW1 P ow er switch SW501 T est pr int s witch VR201 Adjusted .
7-94 Troubleshooting P aper Size Detection Switches Figure 7-21 P aper Size Detection Switches (1 of 3), T ra y 2 (HP LaserJet 4000/4000 N and 4050/4050 N) Figure 7-22 P aper Size Detection Switches (.
Reference Diagrams 7-95 Figure 7-23 P aper Size Detection Switches (3 of 3), Optional 500-sheet Univ ersal T ra y Assembly T able 7-38. Paper Size Detection Switc hes in Figure 7-21 to Figure 7-23 P a.
7-96 Troubleshooting Motors Figure 7-24 Location of Motors T able 7-39. Motors in Figure 7-24 M101 Main Motor M701 Re versing Motor (Duple xer) M702 Duple x Feed Motor (Duple x er) FM101 Cooling F an .
Reference Diagrams 7-97 Connectors Figure 7-25 Connectors (1 of 3).
7-98 Troubleshooting Figure 7-26 Connectors (2 of 3).
Reference Diagrams 7-99 Figure 7-27 Connectors (3 of 3) F or locations of connectors see the wir ing diagr ams at the back of this manual..
7-100 Troubleshooting PCAs Figure 7-28 Location of PCAs.
Reference Diagrams 7-101 T able 7-40. Location of PCAs 1 Engine Controller Board Sequence control, High-v oltage output, DC output, and Heater Drive . 2 P aper Size Detection PCA Rela y between Sensors/Solenoids and Engine Controller Board, and P aper Size Detection.
7-102 Troubleshooting Sensor s and Thermistor Figure 7-29 Location of Sensors and Ther mistor (1 of 2).
Reference Diagrams 7-103 Figure 7-30 Location of Sensors and Ther mistor (2 of 2) T able 7-41. Sensors and Thermistor in Figure 7-29 and Figure 7-30 PS101 T ra y 2 P aper Out Sensor PS102 Pre-f eed Se.
7-104 Troubleshooting PS703 Re versed P aper Sensor (Duple xer) PS801 P aper F eeder P aper Sensor (P aper Feeder) PS901 Env elope Sensor (Env elope F eeder) PS902 Env elope Multiple F eed Sensor (Env elope Feeder) TH901 Fusing Surf ace T emperature Sensor T able 7-41.
Reference Diagrams 7-105 Solenoids and Clutch Figure 7-31 Location of Solenoids and Clutch (1 of 2).
7-106 Troubleshooting Figure 7-32 Location of Solenoids and Clutch (2 of 2).
Reference Diagrams 7-107 T able 7-42. Solenoids and Clutch in Figure 7-31 and Figure 7-32 CL102 F eed Roller Clutch SL101 T ra y 2 Pic kup Solenoid SL102 T ra y 1 Pic kup Solenoid SL103 T ra y 3 Pic k.
7-108 Troubleshooting Switches Figure 7-33 Location of Switches.
Reference Diagrams 7-109 T able 7-43. Switches in Figure 7-33 SW101 Door open detection s witch SW600 T ra y 2 P aper size s witch SW601 T ra y 2 P aper size s witch SW602 T ra y 2 P aper size s witch.
7-110 Troubleshooting Timing Figure 7-34 Pick up Timing for T r ay 2 (and lo wer tra ys) Figure 7-35 Pick up Timing for T r ay 1.
Overview 8-1 8 P ar ts and Diag r ams Overview This chapter discusses the f ollowing: ● How T o Use the P ar ts Lists and Diagr a ms ● Accessories and Supplies ● Illustrations and P ar ts Lists.
8-2 Parts and Diagrams Ho w T o Use the P ar ts Lists and Diagrams The figures in this chapter illustrate the major subassemb lies in the printer and their component par ts.
How To Use the Parts Lists and Diagrams 8-3 Note P ar ts that hav e no item number or par t number listed are not field replacement par ts and cannot be ordered.
8-4 Parts and Diagrams Accessories and Supplies The f ollowing items are a vailab le through your local authorized HP dealer . T o find a dealer near you, call the HP Customer Inf or mation Center (800) 752-0900. Note See page 2-4 f or documentation product numbers.
Accessories and Supplies 8-5 * The maintenance kits can be ordered from Suppor t Materials Organization (U .S.) or Suppor t Materials Europe. See page 8-2 f or order ing inf or mation.
8-6 Parts and Diagrams Common Scre ws and Replacement Cables T able 8-2. Screws Used in the Printer Description P ar t No. Screw , M4x10, self-tapping (b lack) XA9-0870-000CN Screw , M3x4, washer head.
Accessories and Supplies 8-7 T able 8-3. Replaceable Cables Description P ar t No. T able No. Item No. Cable and P ower Receptacle RG5-3696-000CN T able 8-7 on page 8-15 15 Cable , T ra y 1 Sensor RG5.
8-8 Parts and Diagrams Illustrations and P ar ts Lists Figure 8-1 Assembly Location Diag ram Engine Controller Board Assembly T ra y 1 Pic kup Assemb ly T op Cov er Assembly P aper Deliv er y Assembly.
Illustrations and Parts Lists 8-9 T able 8-4. Assemblies (Listed Alphabetically) and Their P a rt Numbers Description P ar t No. Exchange No. Exploded Vie w in Figure Deliv er y Drive Assembly RG5-372.
8-10 Parts and Diagrams Figure 8-2 Exter nal Co v ers and P anels 9 8 1 3 4 6 2 5 7.
Illustrations and Parts Lists 8-11 T able 8-5. External Cover s and Panels Item No. P ar t No. Quantity Description 1 RB1-8858-000CN 1 P anel, Formatter Cov er 2 RG5-2664-000CN 1 Cov er Assembly , Rig.
8-12 Parts and Diagrams Figure 8-3 T op Cov er Assembly 2 3 4 1 5.
Illustrations and Parts Lists 8-13 T able 8-6. T op Co ver Assembl y Item No. P ar t No. Quantity Description 1 RG5-2663-000CN 1 T op Cov er Assembly 2 RB1-8841-000CN 1 P anel, T oner Car tr idge acce.
8-14 Parts and Diagrams Figure 8-4 Inter nal Components (1 of 3) 13 12 7 3 1 2 4 5 6 9 10 11 14 15 8 16 18 20 21 22 17 19.
Illustrations and Parts Lists 8-15 T able 8-7. Internal Components (1 of 3) Item No. P ar t No. Quantity Description 1 RB1-8862-000CN 1 Guide, F or matter/CP Cab l e 2 RG5-3708-000CN 1 Cable F or matt.
8-16 Parts and Diagrams Figure 8-5 Inter nal Components (2 of 3) 1 2 3 4 5 6 9 10 11 12 14 15 16 18 19 17 7 13 20 8 21 22 23.
Illustrations and Parts Lists 8-17 T able 8-8. Internal Components (2 of 3) Item No. P ar t No. Quantity Description 1 RB2-2405-000CN 1 Plate, Control P anel Ground 2 RB1-8671-000CN 1 Suppor t, T op C.
8-18 Parts and Diagrams 23 C4118-40002 C4118-40007 C4118-40020 C4118-40008 C4118-40009 C4118-40010 C4118-40011 C4118-40012 C4118-40013 C4118-40015 C4118-40017 C4118-40018 C4118-40019 C4118-40021 C4118.
Illustrations and Parts Lists 8-19 Notes:.
8-20 Parts and Diagrams Figure 8-6 Inter nal Components (3 of 3) 5 1 2 3 4.
Illustrations and Parts Lists 8-21 T able 8-9. Internal Components (3 of 3) Item No. P ar t No. Quantity Description 1 RF5-1867-000CN 1 Pre-T ransf er Ground Plate Assembly 2 RG5-4283-000CN 1 T ransf .
8-22 Parts and Diagrams Figure 8-7 Engine Controller Board Assembly 1.
Illustrations and Parts Lists 8-23 T able 8-10. Engine Controller Boar d Assembly Item No. P ar t No. Exchange No. Quantity Description 1 RG5-3693-000CN C4118-69006 1 Engine Controller Board (110V) 1 .
8-24 Parts and Diagrams Figure 8-8 Deliv er y Dr iv e Assembly 1 2 T able 8-11. Deliver y Drive Assembl y Item No. P ar t No. Quantity Description 1 RG5-3721-000CN 1 Delivery Dr iv e Assembly 2 WG8-53.
Illustrations and Parts Lists 8-25 Figure 8-9 Printer Dr iv e Assembly 2 1 3 T able 8-12. Printer Drive Assembly Item No. P ar t No. Quantity Description 1 RG5-2653-000CN 1 Printer Drive Assemb ly 2 R.
8-26 Parts and Diagrams Figure 8-10 T ra y 1 Pick up Assembly 1 4 5 6 2 3 7.
Illustrations and Parts Lists 8-27 T able 8-13. T ra y 1 Pickup Assembl y Item No. P ar t No. Quantity Description 1 RG5-2655-100CN 1 T ra y 1 Pickup Assemb ly 2 RB2-2386-000CN 1 Cov er Env elope Feed.
8-28 Parts and Diagrams Figure 8-11 T ra y 1 Assembly 1 T able 8-14. T ra y 1 Assembly Item No. P ar t No. Quantity Description 1 RG5-2656-000CN 1 T ra y 1 Assembly.
Illustrations and Parts Lists 8-29 Figure 8-12 P aper Feed Assemb ly 1 T able 8-15. Paper Feed Assemb ly Item No. P ar t No. Quantity Description 1 RG5-2651-000CN 1 P aper F eed Assembly.
8-30 Parts and Diagrams Figure 8-13 Registration Assemb ly 1 T able 8-16. Registration Assembly Item No. P ar t No. Quantity Description 1 RG5-2652-070CN 1 Registration Assembly.
Illustrations and Parts Lists 8-31 Figure 8-14 P aper F eed Guide Assembly T able 8-17. Paper Feed Guide Assemb ly Item No. P ar t No. Quantity Description 1 RG5-2643-000CN 1 P aper F eed Guide Assemb.
8-32 Parts and Diagrams Figure 8-15 Deliv er y Assembly 3 4 1 2.
Illustrations and Parts Lists 8-33 T able 8-18. Deliver y Assembl y Item No. P ar t No. Quantity Description 1 RG5-2648-000CN 1 Deliv er y Assemb ly 2 RG5-2650-000CN 1 Deliv er y Sensor Arm Assembly 3.
8-34 Parts and Diagrams Figure 8-16 Fuser Assembly (1 of 2) 1 2 T able 8-19. Fuser Assembly (1 of 2) Item No. P ar t No. Exchange No. Quantity Description 1 RG5-2661-000CN RG5-2662-000CN C4118-69003 C.
Illustrations and Parts Lists 8-35 Figure 8-17 Fuser Assemb ly (2 of 2) 1 2 3 T able 8-20. Fuser Assembly (2 of 2) Item No. P ar t No. Exchange No. Quantity Description 1 RG5-2661-000CN RG5-2662-000CN.
8-36 Parts and Diagrams Figure 8-18 Inter nal Components of 500-Sheet F eeder 1 2 3 4 5 6 7 8 11 10 9 12 13 14.
Illustrations and Parts Lists 8-37 T able 8-21. Internal Components of 500-sheet Feeder Item No. P ar t No. Quantity Description 1 RB1-8890-000CN 1 Guide, P aper 2 RB1-8873-000CN 1 Suppor t, P aper Gu.
8-38 Parts and Diagrams Figure 8-19 P aper Pick up Dr iv e Assembly 1 2 3 4 5 6 7 8.
Illustrations and Parts Lists 8-39 T able 8-22. Paper Pic kup Drive Assembly Item No. P art No. Quantity Description 1 RG5-2672-000CN 1 P aper Pickup Drive Assemb ly (500-sheet) 2 RS5-2632-000CN 1 Spr.
8-40 Parts and Diagrams Figure 8-20 500-sheet T ra y 1 2 6 3 4 5 7 8 9 11 12 10.
Illustrations and Parts Lists 8-41 T able 8-23. 500-sheet T ra y Item No. P ar t No. Quantity Description 1 RB1-8947-000CN 1 P anel, Roller Access 2 RF5-2489-000CN 1 Mounting Assembly Separ ation Roll.
8-42 Parts and Diagrams Figure 8-21 Inter nal Components of 250-sheet Module (1 of 2) 1 2 3 4 5 6 7 8 9 10 11 6 12 13 3.
Illustrations and Parts Lists 8-43 T able 8-24. Internal Components of 250-sheet Module (1 of 2) Item No. P ar t No. Quantity Description 1 X A9-0870-000CN 1 Screw , M4x10, Feed Modules 2 RG5-2677-000.
8-44 Parts and Diagrams Figure 8-22 Inter nal Components of 250-sheet F eeder (2 of 2) 1 2 3 4 5A 6 7 5B 8.
Illustrations and Parts Lists 8-45 T able 8-25. Internal Components of 250-sheet Feeder (2 of 2) Item No. P ar t No. Quantity Description 1 RG5-2679-000CN 1 Cov e r Assemb ly , F eeder , Right Lower 2.
8-46 Parts and Diagrams Figure 8-23 Upper P aper Pick up Dr iv e Assembly 1 2 T able 8-26. Upper Paper Pic kup Drive Assembl y Item No. P ar t No. Quantity Description 1 RG5-2683-000CN 1 Upper P aper .
Illustrations and Parts Lists 8-47 Figure 8-24 Low er P aper Pickup Driv e Assembly 1 2 T able 8-27. Lower P aper Pickup Drive Assemb ly Item No. P ar t No.
8-48 Parts and Diagrams Figure 8-25 250-sheet T ra y 1 2 3 4 5 6.
Illustrations and Parts Lists 8-49 T able 8-28. 250-sheet T ra y Item No. P ar t No. Quantity Description 1 RF5-2505-000CN 1 each Mounting Assembly Separ ation Roller 2 RB1-9001-000CN 1 each P anel Ro.
8-50 Parts and Diagrams Figure 8-26 Inter nal Components of Optional 500-sheet Univ ersal T ra y Assembly 1 2 3 4 5 6 7 8 9 10 11 11 12 13 13.
Illustrations and Parts Lists 8-51 T able 8-29. Internal Components of Optional 500-sheet Universal T ray Assembl y Item No. P ar t No. Quantity Description 1 XD2-1100-502CN 1 Ring, E 2 RG5-2690-000CN.
8-52 Parts and Diagrams Figure 8-27 Optional 500-sheet Univ ersal T ray Assemb ly 4 1 2 3 5 6 8 7.
Illustrations and Parts Lists 8-53 T able 8-30. Optional 500-sheet Universal T ray Assembl y Item No. P ar t No. Quantity Description 1 RF5-2489-000CN 1 Separ ation Roller Mounting Assembly 2 RB1-9374.
8-54 Parts and Diagrams Figure 8-28 Env elope F eeder 1 2 4 3.
Illustrations and Parts Lists 8-55 T able 8-31. En velope Feeder Item No. P ar t No. Exchange No. Quantity Description 1 C4122A C4122-69001 1 Env elope F eeder 2 RB1-9088-000CN 1 T ray , Env elope Fee.
8-56 Parts and Diagrams Figure 8-29 Inter nal Components of Duple x er 2 3 4 5 6 1.
Illustrations and Parts Lists 8-57 T able 8-32. Internal Components of Duplexer Item No. P art No. Exchange No. Quantity Description 1 C4123A C4123-69001 1 Duple xer 2 RB1-9044-000CN 1 Cov er , T op 3.
8-58 Parts and Diagrams Alphabetical P ar ts List T able 8-33. Alphabetical Parts List Description P ar t Number T able Number and P age 250-sheet Univ ersal Replacement T ra y C4126A T able 8-1 on pa.
Illustrations and Parts Lists 8-59 Cable , P aper F eed/T ra y 1 Pick up Solenoid RG5-3703-000CN T able 8-7 on page 8-15 Cable , Sensor RG5-3711-000CN T able 8-21 on page 8-37 Cable , T op Cov er Swit.
8-60 Parts and Diagrams Cov er Fe eder Right Assembly RG5-2668-000CN T able 8-21 on page 8-37 Cov er , Left with Connector RF5-1876-000CN T able 8-32 on page 8-57 Cov er , Right Duplex er RB1-9047-000.
Illustrations and Parts Lists 8-61 F ont DIMM (8 MB Asian MROM) T raditional Chinese Simplified Chinese Euro C4292A C4293A C4210A T able 8-1 on page 8-4 F oot RB1-8107-000CN T able 8-21 on page 8-37 F.
8-62 Parts and Diagrams Le vers, T ra y Sensing Lowe r RB1-9034-000CN T able 8-25 on page 8-45 Le vers, T ra y Sensing Upper RB1-9033-000CN T able 8-25 on page 8-45 Low e r Paper Pic kup Drive Assembl.
Illustrations and Parts Lists 8-63 P aper F eeder Cable RG5-3822-000CN T able 8-29 on page 8-51 P aper Pickup Driv e Assembly , Optional 500-sheet T ra y RG5-2690-000CN T able 8-29 on page 8-51 P aper.
8-64 Parts and Diagrams Roller , T ranspor t Pressure RB1-8922-000CN T able 8-24 on page 8-43 Screw , M3x16, F eed Modules XA9-0917-000CN T able 8-21 on page 8-37, T able 8-24 on page 8-43, and T able.
Illustrations and Parts Lists 8-65 Spring, Leaf RB1-8927-000CN T able 8-29 on page 8-51 Spring, Pickup RS5-2632-000CN T able 8-22 on page 8-39 Spring, Rear T ra y Latch RB1-8847-000CN T able 8-6 on pa.
8-66 Parts and Diagrams T ra y , Rear Extension RB1-8844-000CN T able 8-5 on page 8-11 Upper P aper Pickup Driv e Assembl y (250-sheet) RG5-2683-000CN T able 8-26 on page 8-46 W eight, Env elope RF5-2511-000CN T able 8-31 on page 8-55 T able 8-33.
Illustrations and Parts Lists 8-67 Numerical P ar ts List T able 8-34. Numerical Parts List P ar t Number Description T able Number and P age 92215N Macintosh Network Cable Kit T able 8-1 on page 8-4 .
8-68 Parts and Diagrams C4127A T oner Car tr idge (6,000 P ages) T able 8-1 on page 8-4 C4127X T oner Car tr idge (10,000 pages) T able 8-1 on page 8-4 C4135-67901 C4136-67901 C4137-67901 EDO DIMM 4 M.
Illustrations and Parts Lists 8-69 RB1-8690-000CN Retainer , T oner Sensing Spring T able 8-8 on page 8-17 RB1-8693-000CN Spr ing, T oner Car tr idge Drum Ground T able 8-8 on page 8-17 RB1-8694-000CN.
8-70 Parts and Diagrams RB1-8858-000CN P anel, Formatter Cov er T able 8-5 on page 8-11 RB1-8860-000CN Clip , Right Side P anel T able 8-5 on page 8-11 RB1-8862-000CN Guide, F or matter/cp Cable T abl.
Illustrations and Parts Lists 8-71 RB1-9044-000CN Cov er , T op T able 8-32 on page 8-57 RB1-9045-000CN P anel, Rear T able 8-32 on page 8-57 RB1-9047-000CN Cov er , Right Duplex er T able 8-32 on pag.
8-72 Parts and Diagrams RG5-2645-000CN Suppor t, T op Cov er , Right T able 8-7 on page 8-15 RG5-2648-000CN Deliver y Assemb ly T able 8-7 on page 8-15 and T able 8-18 on page 8-33 RG5-2650-000CN Deli.
Illustrations and Parts Lists 8-73 RG5-2685-000CN Feeder , Control PCA T able 8-25 on page 8-45 RG5-2688-000CN Left F rame Assembly T able 8-29 on page 8-51 RG5-2690-000CN Paper Pic kup Drive Assemb l.
8-74 Parts and Diagrams RH7-5172-000CN Solenoid, T ra y 1 Dr iv e T able 8-13 on page 8-27 RS5-0911-000CN Gear , Coupler T able 8-9 on page 8-21 RS5-0946-000CN Gear , T ranspor t Roller T able 8-24 on.
Index-1 Inde x Numerics 250-sheet tray, paper specifications 1-13 500-sheet tray, paper specifications 1-12 A AC/DC power distribution 5-2 accessories 8-4 assemblies Delivery 8-32 Delivery Drive 6-41,.
Index-2 Engine Controller Board Assembly 8-22 removing and replacing 6-44 engine controller subsystem 5-6 Engine Module 6-42 engine test 7-11 Envelope Feeder 5-44 envelopes 1-20 environmental product .
Index-3 Paper Pickup Drive Assembly 8-38 Paper Pickup Drive assembly lower 8-47 upper 8-46 paper specifications card stock 1-23 envelopes 1-20 guidelines for using paper 1-16 heavy paper 1-23 labels 1.
Index-4 T testing, engine 7-11 thermistor 7-102 timing diagrams 7-110 toner cleaning spilled 4-4 consumption 1-28 toner cartridge 2-9, 5-22, 5-24 detection 5-5 recycling 2-9 refilled 2-9 Toner Cartrid.
Wiring Diagram (HP LaserJet 4000/4000N) Printer controller PCA Fuser paper delivery sensor 1 Control Panel Duplexing unit driver PCA Duplexing unit PS 106 Fuser paper delivery sensor 2 Fuser T oner ca.
Wiring Diagram (HP LaserJet 4000 T/4000TN) Printer controller PCA Fuser paper delivery sensor 1 Control Panel Duplexing unit driver PCA Duplexing unit PS 106 Fuser paper delivery sensor 2 Fuser T oner.
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HP LaserJet 4000 and 4050 Series Printers Service Manual HP LaserJet 40 00 and 40 50 Series Prin ters Service Manual Printed on at least 50% T otal Recyc led Fiber with at least 10% P ost-Consumer Paper Copyright© 1999 He wlett-Packard Co. Printed in USA Manual Part No.
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