Instruction/ maintenance manual of the product TH50PHW5 Panasonic
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Panasonic Services Company National Training TH - 42PHD5/TH - 50PHD5 TH - 42PHW5/TH50PHW5 GPH5D Chassis Plasma Display Panel Troubleshooting Guide Warning This service information is designed for experienced repair technicians only and is not designed for use by the general public.
3 Objective ............................................................................................................... 5 2002 Model Line Up .............................................................................................. 6 Specifications .
4 Service Hints .................................................................................................... 46 After Image Prevention ....................................................................................... 53 Screen Saver Feature .
5 Objective The information provided in this document is designed to assist the technician in determining the defective printed circuit board. The troubleshooting flow charts, signal path charts and c.
6 2002 Model Line Up TH - 50PHW5 50 - inch (127 cm) HD Plasma Display HD Panel Digital Cinema Reality Advanced 3 - dimensional Progressive Scan 1366 x 768 XGA Resolutio n (UXGA Compatible) TH - 42PHW5 42 - inch (106cm) TH - 42PW5 42 - inch (106 cm) Wide Plasma Display Plasma Contrast Automatic Tracking System (C.
7 Specifications Our New 50” & 42” HD Progressive Panels The industry’s highest - resolution panels Panasonic Company PI Company F/H Scanning Method Progressive Progressive Interlace 50 - inch 1,366 x 768= 1.05 million pixels 1,280 x 768= 0.
8 Features Pixel explanation 852 pixels 480 pixels 410,000 Pix els 1,024 pixels 768 pixels 790,000 pixels SD (Standard Definition) Panel HD (High - Definition) panel Reproduces even the tiniest details of high - definition sources and other high - quality images.
9 New front protection filter glass improves the natural reds reproduc ti New phosphors improve the blue color reproduction. Scan Explanat ion The 1 - field (1/60 sec) display pixels on the Panasonic 42" and 37" SD models and on the ALIS system models are VGA level.
10 D D u u a a l l S S c c a a n n ( ( H H D D ) ) S S i i n n g g l l e e S S c c a a n n ( ( S S D D ) ) • Simple and low cost circuit • High performance • Higher brightness Figure 5 Figure 4.
11 Disassembly Rear Cove r Removal Remove the 27 screws, shown in Figure 6, and then pull away the rear cover. Removal of the shield Remove the six screws, shown in Figure 7, and then pull away the rear shield cover.
12 Location of Lead Wiring High freque ncy electromagnetic signals can create electrical interference within the unit. Be sure to route all wires through their respective harnesses reference. The chart below is an illustration representing the connectors and the wire harnesses associated wit h them.
13 42” HD PCB Board Layout Diag ram Printed Circuit Board Information Table Board Name Part Number Function C1 TNPA2428 Data Drive (Upper Left) C2 TNPA2429 Data Drive (Upper Right) C3 TNPA2430 Data .
14 50” PCB Board Layout Diagram Board Name Part Num ber Function C1 TNPA2510 Data Drive (Upper Left) C2 TNPA2511 Data Drive (Upper Center) C3 TNPA2512 Data Drive (Upper Right) C4 TNPA2513 Data Drive.
15 42” SD PCB Layout Diagram Board Name Part Number Function C1 TNPA2540 Data Drive (Lower Right) C2 TNPA2541 Data Drive (Lower Left) D1 TZTNP01MMSB Format Converter D2 TNPA2589 Plasma AI Sub - Fiel.
16 Video Signal Path Explanation HY/HZ Board Figure 13 The "HY/ H Z" board is equipped with one Component input, one Composite input and one S - Video input. The Composite and S - Video inputs are applied to a switching circuit, which is controlled by the system control IC, located on the D1 - Board.
17 HX Board Figure 14 PC RGB Signals are input to the HX Board. The RGB signals as well as the vertical and hori zontal sync signals are amplified by a series of transistor amplifiers. The RS232C communications bus line is also connected on this board.
18 D1 Board Figure 15 After the input signals are ampl ified by the HY/HZ and HX boards the desired signal is selected. The microprocessor sends the command via the IIC bus to the input select switch (IC3001). The video switch selects from one of the three inputs.
19 DVI Interface Figure 16 An optional Digital Visual Interface (DVI) module connection is provid ed on this generation Plasma Display Panels. The DVI interface allows direct digital transfer from a display device to the panel.
20 Figure 18 shows an example of the DVI interface. It permits direct connection of the digital video signal to the Format converter. This bypa sses the D/A and A/D process providing the better quality picture. Installation of the DVI interface requires removal of the HY/HZ Board and replacing it with an optional DVI interface board.
21 Sync Process Figure 19 The vertical and horizontal sync signal paths are slightly different depending on the Source signal. RGB/PC Input Mode Sync The vertical and horizontal sync signals generated by the input device are applied to connector D3 or D2 to a Sync swi tch (IC3002).
22 D1 Board Figure 20 D1 - board consists of the Analog and Digital signal process. It also contains the Discharge control and Microprocessor control block. Supply voltages of 13.5V, 5V, Standby 5V, 3.3V, and 1.8 V operate the D1 - board. The input RGB video signals are at 0.
23 D2 Board Figure 21 The D2 board provides the scan, sustain and data drive signals. The scan pulses are output to the SC board. The sustain puls es are output to the SS board. The data drive signals are output to the C1, C2, C3 and C4 boards. The C1 board drives the Upper right portion of the panel; the C2 board drives the upper left portion.
24 D2 Board details Figure 22 The Plasma AI (Adaptive brightness Intensifier) circuits analyze the video program level for the distribution of dark and bright components. The up per and lower eight bit video signals are memorized into two Plasma AI processors IC9651 and IC9601.
25 SC Board Explanation Figure 23.
26 Figure 24 The SC Board consists of buffers and drivers used to generate the scan signals to the panel. The buffers provide isolation between the D2 board and the drivers. Connector SC20 provides the drive signals (140V, 100V and 1 8V). Connector SC21 provides trigger signals to switch the FET transistors.
27 Figure 25 After the scan waveform is developed on the SC Board, it is applied to the SU and SD boards for de - multiplexing. The signal is in put to a series of shift registers inside the PDP scan driver IC. Figure 25 shows an example of the de - multiplexing circuit.
28 SS Board Explanation Figure 26 After the video signal is processed on the D2 board, the sustain and erase pulses are output to the SS board. The erase pulse is output at the beginning of each scan period. The pulse is applied to the SS2 and SS3 boards to remove the p revious charge for the upper and lower sections of the display panel.
29 Figure 27 Figure 28.
30 The Sustain pul se is developed using a similar circuit as the Scan Pulse. A series of specifically timed pulses are applied to FET drivers creating the distinctive sustain pulse. The drivers switch the voltages (150V, 155V and 175V) at selected intervals determined by th e D2 board.
31 Po wer Supplies Standby Power Supply Figure 29 The st andby power supply provides the necessary DC voltage for the system control Microprocessor, Reset circuit and the EEPROM. D421 rectifies the incoming AC Voltage and applies it to the transformer T402 and the standby B+ control circuit IC400.
32 Main Power Supply Figure 30 Power Factor Control The power factor control circuit operates like a boost regulator. The incoming AC voltage, after being switched on, enters the r ectifier D402 where it is converted to DC. The Power Factor Control (PFC) circuit converts the DC level to 400Vdc.
33 Low Voltage Power supply VCC and Start - up voltage for the low voltage power supply is provided to IC650 of the P5 Board by the st andby power supply circuit (not shown). Upon start - up of the switching control circuit, a pulse width modulated signal is output at pin 9 of connector P18/P18A to drive the switching transistor Q416.
34 High Voltage Power Supply Figure 31 The P3 - Board contains the drive voltage oscillator circuit that develops the Vsus voltage needed to drive the Scan and Sustain boards. Operation begins with the 18Vdc supply being appl ied to pin 12 of connector P15.
35 Over - voltage protection (OVP) is provided via pin 6 of connector P16. This volta ge enters pin 4 of IC601 for immediate shutdown of the IC if the Vsus voltage rises to an undesired level . The OVP feedback is also provided to the system control circuit via pin 13 of connector P15 for immediate shutdown of the entire unit.
36 Protection Circuits Figure 32 Protection circuits are incorporated in the unit to prevent the failure of a single circuit or component from creating catastrophic damage. The P7 and P8 boards are daughter boards on the P1 main power supply board. The P7 board monitors the Vbk (195V), Vda (75V) and +17V supply voltages.
37 the result is compared to a reference voltage. The reference voltage is provided by a zener diode. If the output of the comparator goes high, Q6741 turns on effectively grounding the SOS line. The SC board uses a similar circuit to monitor the +17V line.
38 Diagnostic Procedures Self Check Display Indication Self - check is used to automatically check the bus line controlled circuits of the Plasma display. To get into the Self - check mode, press and hold the Volume Down button on the front of the unit, then the OFF - TIMER button on the remote control.
39 Power LED Flashing timing chart When an a bnormality has occurred in the unit, the protection circuit operates and shuts off the power supply. The faulty area can be identified by the number of flashes of the Power LED at the front of the unit.
40 Diagnostic Flow Charts No Power There are three s tates of “No Power” indication by the power LED: 1. The power LED does not light up. 2. The power LED is green at power up. It then turns red a few seconds later and blinks on and off. 3. The power LED is red at power up and never changes state.
41 The Power LED is red and blinking on/off. When one or more of the power supply voltages is missing, the red LED blinks on and off. Remove Connector P5 No Is the LED still blinking red? Check D1 - Board. Check SS/SC - Boards. Yes Blinking stops But still no picture Check the output of the P - Board.
42 Power LED blinks twic e Are the SS board LEDs lit? The SS board is suspected to be defective. Is the SC board LED lit? The SC board is susp ected to be defective. Is the Vda voltage correct? The Power supply is suspected to be defective. The D1 is suspected to be defective.
43 No Picture Flowchart 1 Is the On screen Display information visible? Is the SC Board LED illuminated? Is the SS Board LED il luminated? SC Board is probably defective.
44 No picture Flowchart 2 Are the video signals correct at the D 1 board input? Reference the HY/HZ and HX board troubleshooting charts Is the SC board LED lit? The SC board is suspected to be defective. Is the TPSC1 Waveform incorrect? The D2 Board is suspected to be defective.
45 Dark picture Flowcha rt Are the video signals correct at the D1 board input? Reference the HY/HZ and HX board troubleshooting charts Are the SS board LEDs lit? The SS board is suspected to be defective. Is the TPSS1 Waveform incorrect? The D2 Board is suspected to be defective.
46 Local screen failure The Plasma Display Panel unit may develop a failure, where the symptom is localized in a particular area of the screen. The figure below can help localize the circuit board that is most lik ely to be defective. In the example in figure 34, one of the two boards, C3 and D2 is likely to be the cause.
47 2. Listen to the buzz noise of the SC board; if the buzz noise is not present, a malfunction of the SC - Board is suspected. Suggestions: Check the Scan pulse waveform at TPSC1. (Use TPSS1 of the SS - board to trigger the oscilloscope.) Verify the input signals at connector SC2, SC4, SC20 and SC21.
48 Symptom: No picture (black Screen) v Suggestion: The use of a magnifying glass can help localize the defective printed circuit board. Use the magnifying glass to take a close look at the pixels of the screen.
49 Suggestions: Check the Scan pulse waveform at TPSC1 of the SC - Board. (Use TPSS1 of the SS - board to trigger the osci lloscope.) Proceed to check the power sources at connector SS11, SS12 and SS33. Verify that the clock and serial data lines from the D - board are present at connector SS33.
50 Figure 41 Symptom: Horizontal Black Bar (Completely dark) Note: The use of a magnifying glass can help localize the defective printed circuit board.
51 Symptom: Vertical Black Bar • Suggestion: Since the C2 board contains the serial to parallel converters for th e picture data that drive this portion of the screen; the most likely cause for this defect can be localized to the C2 - Board or the D2 - Board.
52 v Symptom: Burned image (pattern) is visible. Suggestion: Activate the scroll bar or run the set with a white raster for at least fifteen minutes. Panasonic Figure 44.
53 After Image Prevention If a customer has been viewing a 4:3 picture or another stationary pattern for a long period of time it is possible for an after image to be burned into the panel. Advise the customer that operation in 4:3 mode for a long period can cause a permanent image burn, damaging the panel.
54 4. To stop the screen saver, press the R button on the remote control. Side Bar Brightness adjustm ent This feature allows the customer to adjust the brightness of the non - picture area on either side of the 4:3 image on screen. 1. Press the Setup button on the remote control.
55 Option Setting Accessing the Option Menu 1. Press to display the Setup menu. 2. Press to select OSD Language. 3. Press the surround button on remot e control for more than three seconds.
56 Settings the Action Menu 1. Use the Up/Down buttons to select the desired item. 2. Use the Left / Right Buttons to select the desired function The option menu will disappea r 60 seconds after the operation. Press the R button to exit the Option Menu.
57 Note: Setting the remote control User Level and Remote ID off. 1. Access service mode (CAT - mode ) and press SET UP key on remote. 2. Access the hidden option menu.
58 Sample Waveforms HY/HZ board The pages that follow contain samples of waveforms that are present when the unit is in good operating condition. Prior to determining that a board should be replaced, it is advisable that these waveforms are checked to help achieve the right conclusion.
59 The waveforms listed below must be checked at connector H2 of the HZ - Board. Note: If any of the signals shown here is missing, this indicates a possible malfunction of the HZ - Board. Verify that all DC and I 2 C inputs to the HZ - Board are present.
60 The waveforms listed below must be checked at connector H2 of the HZ - Board. Note: A possible malfunction of the HZ - Board may exist if any of the signals listed above is missing. Verify that all DC and I 2 C inputs to the HZ - Board are present.
61 HX board Figure 62 is an illustration of the HX - Board. The board is the interface between the PC input and the D1 - Board. When troubleshooting, connect a PC to th e input terminals and observe the output signals at connector HX1/D3. See the next page for waveform samples.
62 Note: The signals listed below must be checked at connector HX1 of the HX - Board. Note: A poss ible malfunction of the HX - Board may exist if any of the signals listed on this page is missing. Verify that all DC inputs to the HX - Board are present.
63 SC Board Input Signals Figure 63 Figure 63 is an illustration of the SC - Board connection to the remaining boards of the panel. The SC - board is the interface between the D2 - Board, SU and the SD Boards. When troubleshooting, connect a fixed video source to any of the input terminals and observe the input signals at connector SS20 and SS21.
64 SC Board Waveforms The waveforms listed below must be checked at connector SC20 of the SC - Board. CN SC20, Pin 1 1ms / div, 0.2V CRL CN SC20, Pin 2 1ms / div, 0.2V CEL CN SC20, Pin 3 1ms / div, 0.2 V CEH CN SC20, Pin 6 1ms / div, 0.2V CSL CN SC20, Pin 7 1ms / div, 0.
65 The waveforms listed below must be checked at connector SC21 of the SC - Board. CN SC21, Pin 2 1ms / div, 0.2V CL CN SC21, Pin 3 1ms / div, 0.2V CLK CN SC21, Pin 4 1ms / div, 0.2V SIU CN SC21, Pin 9 1ms / div, 0.2V CPH CN SC21, Pin 6 1ms / d iv, 0.
66 SS - Board Input Signals Figure 64 Figure 64 is an illustration of the SS - Board connection to the remaining boards of the panel. The SS - board is the interface between the D2 - Board, SS2 and the SS3 Boards. When troubleshooting, connect a fixed video source to any of the input termin als and observe the input signals at connector SS32.
67 SS Board Waveforms The waveforms listed below must be checked at connector SS32 of the SS - Board. CN SS32, Pin 2 1ms / div, 0.2V URH CN SS32, Pin 3 1ms / div, 0.2V UEL CN SS32, Pin 4 1ms / div, 0.2V U EH CN SS32, Pin 5 1 ms / div, 0.2V UBL CN SS32, Pin 6 1ms / div, 0.
68 PDP Defect Pixel Specification Zone B Zone A 25% 25% Check Zone Lit Pixel Single Defect Pair Defect Defect Distance G 0 A R 0 0 - B 3 G B R 0 6 0 5 cm B Dead Pixel Zone Specification 1. Dead Pixel (pixel is always off) 2. Lit Pixel (pixel is always on) 3.
69 Connector Tables F - BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the F - Board. Use this information to confirm that the F - Board is operating properly.
70 P - BO ARD CONNECTORS (Continued) Connector P3/SS3 Pin Numbers Signal Name Signal Flow (Board or Connector) 1 VDA P3 --- à SS3 (SS - BOARD) 2 VDA P3 --- à SS3 (SS - BOARD) 3 NC P3 --- à SS3 (SS .
71 Connector P10/FAN Pin Numbers Signal Name Signal Flow (B oard or Connector) 1 FAN +12V P10 --- à FAN 2 GND P10 --- à FAN 3 FAN SOS P10 --- à FAN Connector P11/FAN Pin Numbers Signal Name Signal .
72 P - BOARD CONNECTORS (Continued) Connector P18/P18A Pin Numbers Signal Name Signal Flow (Board or Connector) 1 STOP P18 --- à P18A (P1 - BOARD) 2 VCC P18 --- à P18A (P1 - BOARD) 3 START P18 --- à P 18A (P1 - BOARD) 4 NC P18 --- à P18A (P1 - BOARD) 5 GATE P18 --- à P18A (P1 - BOARD) 6 NC P18 --- à P18A (P1 - BOARD) 7 H.
73 HX - BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the HX - Board. Use this information to confirm that the HX - Board is operating properly. Connector HX1/D3 Pin Number Signal Nam e Voltage Findings Signal Flow (Board or Connector) A - 1 5V 5.
74 HY / HZ - BOARD CONNECTORS The following table lists the voltage levels present at each pin of the connectors of the HY or HZ - Board. Use this information to confirm that the HY or HZ - Board is operating properly.
75 Adjustment Procedures Panel label Information An example of the panel production date: MC106W36P4 NO. ************* Vbk: **** V Vsus: **** V Ve: **** V Vad: **** V Made in Japan M Panel Production Date *** Panel Part Number Panel Serial Number Adjustment Voltage Year 9 1999 0 2000 1 2001 1.
76 +B Set - up Item / Preparation • Input a Black & White video signal. • Set the picture mode to Normal and the White Balance to Normal • Adjustments Adjust and confirm the indicated test poin t below for the specified voltage.
77 Driver Set - up Item / Preparation • Input an APL 100 % white signal. • Set the picture mo de to Normal and the White Balance to Normal Adjustments To perform the following adjustments, please refer to the panel information label located on the heat sink of the panel.
78 Initialization Pulse Adjust Item / Preparation • Input a Crosshatch signal. • Set the picture mode to Normal and the White Balance to Normal Adjustments Adjust the indic ated test point for the specified waveform. Use TPSS1 as the trigger source.
79 P.C.B. (Printed Circuit Board) exchange procedure 1. Caution Wait 1 minute for the electrolytic capacitors to discharge before removing any PCB from the unit.
80 Test Point locations Figure 69.
81 Le f t/ Right Act ion VOL R Status Return VOL Up/Do wn VOL Up/Do wn Serviceman mode CAT (computer aided test) Mode CAT mode menu CAT Panel sys8.1 IIC Mode CD Mode SD Mode MS Mode ID Mode Remote Control How to access the CAT mode .
82 CD mode Select the CD mode from the front page of the CAT menu by pressing the Up/Down button on the remote control, and then press the Mute button on the remote control for more than 5 sec. O SD The software version of the EEPROM (IC9354) can be upgraded by: 1.
83 SD Mode Select the SD mode from the front page of the CAT mode by pressing the Up/Down button on the remote control, and then pres s the Action button on the remote control.
84 I 2 C M enu S tructure The values indicated in this flowchart are sampled data. Figure 70.
85 Alignment Procedures NTSC Panel White Balance Equipment required: NTSC Gray scale pattern Generator, Color Analyzer Panel Settings; Picture = Normal, White Balance = Cool, Aspect Ratio = 16:9 Pattern Display: Figure 71 Step 1 Find the area of Low light closest to 10 cd/m2 using the color sensor.
86 Pedestal Setting Equipment required: HDTV Component Video Gray scale pattern Generator, PC Video Gray Scale Generator Panel Settings; Picture = Normal, White Balance = Cool, Aspect Ratio = 16:9 Pattern Display: Figure 72 Step 1 - Access the R, G and B cutoff settings and set them to “80”.
87 PC/R GB Panel White Balance Equipment required: PC Gray scale pattern Generator, Color Analyzer Panel Settings; Picture = Normal, White Balance = Cool, Aspect Ratio = 16:9 Pattern Display: Figure 73 Step 1 Fin d the area of Low light closest to 10 cd/m2 using the color sensor.
88 Step 15 - Write down the color temperature of the R, G, B drive and cutoff data into table 3. Table 3 White Balance Cool Normal Warm R Drive G Drive B Drive R Cutoff G Cutoff B Cutoff Step 16 - Input a RGB Signal. Ste p 17 - Copy the PC Data R, G, B drive and cutoff data to the RGB settings.
89 HD /525i /525P Panel White Balance Equipment required: HDTV (720P or 1080I) grayscale pattern Generator, Color Analyzer Panel Settings; Picture = Normal, White Balance = Cool, As pect Ratio = 16:9 Pattern Display: Figure 74 Step 1 Find the area of Low light closest to 10 cd/m2 using the color sensor.
90 Step 15 - Write down the color temperature of the R, G, B drive and cutoff data into table 5. Table 5 White Balance Cool Normal Warm R Dri ve G Drive B Drive R Cutoff G Cutoff B Cutoff Step 16 - Change the Input signal to 525i and 525p. Step 17 - Copy the HD drive and cutoff data to the 525i and 525p settings.
91 625i Panel White Balance Equipment required: HDTV (625i) grayscale pattern Generator, Color Analyzer Panel Settings; Picture = Normal, White Balance = Cool, Aspect Ratio = 16:9 Pattern Display: Figure 75 Step 1 Find the area of Low light closest to 10 cd/m2 usin g the color sensor.
92 Sub Brightness Setting Equipment required: NTSC grayscale pa ttern Generator Panel Settings; Picture = Normal, Aspect Ratio = 16:9 Pattern Display: Note: Adjust in a Dark room.
93.
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If you have not bought Panasonic TH50PHW5 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Panasonic TH50PHW5 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Panasonic TH50PHW5 you will learn all the available features of the product, as well as information on its operation. The information that you get Panasonic TH50PHW5 will certainly help you make a decision on the purchase.
If you already are a holder of Panasonic TH50PHW5, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Panasonic TH50PHW5.
However, one of the most important roles played by the user manual is to help in solving problems with Panasonic TH50PHW5. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Panasonic TH50PHW5 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
