Instruction/ maintenance manual of the product MAR775 Marantz
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DR6050 DR6050 Compact Disc Recorder DR6050 386K855010 MIT 3120 785 22370 First Issue 2000.12 Service Manual DR6050 / F1N, /K1G, /N1G /F1B, /K1B, /N1B, /U1B R Printed in Japan Please use this service manual with referring to the user guide ( D .F .U . ) without f ail.
MARANTZ DESIGN AND SER VICE Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound. Only original MARANTZ par ts can insure that y our MARANTZ product will continue to perform to the specifications for which it is famous .
1 1. Servicing the DR6050 1.1 INTRODUCTION: The DR6050 is the consumer version of a CD recorder , this means that the SCMS (Serial Copy Management System) is included. The DR6050 can only record on the Audio CDRs (Consumer Use). The DR6050 is suitable for recording and playback of CD-R W discs (CD-Re Writable disc).
2 1.2.1 CDR loader (CDR main module CDL4009 or MAR770): This complete CDR loader is considered as not repairable in the field. therefore this module will be repaired centrally .
3 2 TECHNICAL SPECIFICA TIONS GENERAL System .................................................................................................... Compact disc digi tal audio Number of channels ..........................................................
4 WARNING All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wristband with resistance.
5 5. SERVICE TOOLS Audio signals disc 4822 397 30184 Disc without errors (SBC444)+ Disc with DO errors, black spots and fingerprints (SBC444A) 4822 397 30245 Disc (65 min 1kHz) without no pause 4822 397 30155 Max.
6 6. Diangostic Software 6.1 Deal er mode The purpose of the dealer mode is to prevent people taking out the CD inside the player at exhibit i ons, showrooms etc.
7 6.3 Electrical service diagnostics Figure 6-2 CDR MAIN BOA RD TEST ELECTRICAL SERVICE DIAGN OSTICS (software versions, test for defective components) PLAYER INFORMATION YES NO Tests OK? If power ON,.
8 6.3.1 Description The intention of the electrical service diagnostics is to show the software versions present in the player and to direct the dealer towards defective internal units. The units are : the CDR main board, the CDR loader, the CD loader in case of a DR6050 and the keyboard/display board.
9 6.4.2 Requirements to perform the test Working key board to cycle th rough the tests and to start up the test. Working local displ ay to c heck th e output mes sages. 6.4.3 Description of the tests Focus co ntrol test The focussing lens is continuously moving up and down.
10 7. Faultfinding trees 7.1 CDR-Module Figure 7-1 NO DISC LOADED SWITCH ON POWER PRESS < OPEN/C LOSE > SEE CD-DA DIS C FAULT FINDING SEE CD-R DISC FAULT FINDING SEE CD- RW DISC FAULT FINDING IN.
11 Figure 7-2 PLAY BA CK OF CD-DA DISCS OK PRESS < PL AY > CD-DA DISC LOADED CHECK: CHECK: PLAY AUDIO SIGN ALS DISC TRACK 15 : SIGNAL OF 5.4 VPP ON PINS 1 AND 3 OF CONN . J652 KILL VOLTAGE (pin 7 conn. JJ01): -8V DURING PLAY NO NO NO NO NO YES YES YES YES HEADPHO NE? DIGITAL YES DISTORTION? DISPLAY: “ CD ” & T.
12 Figure 7-3 FINALISED CD-R DISC LOADED SET OK CD-R DISC PARTIALLY RECORDED OR EMPTY START RECORDI NG FROM DIGITAL SOURCE START MANUAL RECORDING FROM ANALOG SOURCE CD-R DISC LOADED LEVEL ADJ USTABL E.
13 Figure 7-4 CD- RW DISC LO ADED START ER ASING O F LAST RECORD ED TRACK SET OK ERASIN G SUCCESS FUL? YES NO FINALISED CD-RW DISC LOADED CD-RW DISC PARTIALLY RECORDED OR E MPTY NO YES DISPLAY: “ CD.
14 7.2 CD Module Figure 7-5 NO DISC PO W ER ON PRESS < OPEN /CLOSE > LOAD D ISC (CD-DA OR PARTIALLY RECORDED CD-R/CD-RW ) PRESS < O PEN/CLOS E > DISC DETECTI ON STARTS? DISPL AY? CHECK FLE.
15 Figure 7-6 CD MODULE PL A YB A C K PRESS < PL AY > AUDIO? DAC 7309 TESTPOINTS 20, 21, 22 : I 2 S AT IN P UT OF DAC 7309 CHEC K POWER SU PPLY PIN S 4, 13 CHECK CLK11 AT PIN 6 : 11.
16 8. Faultfinding Guide 8.1 Display Boar d 8.1.1 Description of display board General descriptio n The display board has three major parts : the FTD (Fluorescent Tube Display), the display controller TMP87CH74F and the keyboard. The display controller is controlled by the DASP master process or on the CDR main board.
17 8.1.2 Test instructions Supply voltages The display board receives several voltages v ia connector JY01. • VFTD : -35V ±5% measured at pin 2 of conn. JY01. • VDC1-VDC2 : 3V8 ±10% measured between pin 1 and 3 of conn. 1119. • +5 V : +5V ±5% measured at pin 10 of conn.
18 Figur e 8- 5 ‘ K e y ma t rix scan lin e ’ Easy jog knob Rotary operation The easy jog knob (SY26) incorporates a whole heap of user control possibilities in just one k nob. Without the knob being operated, pin 1 and 3 of the knob (and thus pin 16 and 17 of the display controller), maintain the +5V level.
19 8.1.3 Display board troubl eshooting guide Figur e 8- 9 Di s pla y bo a rd tro ubl es hooting ’ SWITCH POWER ON, EXIT STAND BY MODE DISPL AY BOARD OK DISPL AY? CHECK : SUPPL Y VOLT AGES -35V ± 5 % at conn. JY01-2 3V8 ± 10% bet ween conn. JY01-1 and JY01-3 +5V ± 5 % at conn.
20 8.2 Power Supply Unit P816 8.2.1 Description of P816 MOSFET Q825 is used as a power switch controll ed by the controller Q810. W hen the switch is closed, energy i s transferred from mains to th e transfor mer. This energy i s supplied to the load when the switch is opened.
21 Pin function description Figure 8-12 Pin Name Description 1V C C This pin is the posit ive supply of the IC. The operat ing voltage range af ter st art-up is 9. 0 to 14.5 V . 2V C The output high s tate (V OH) is set by the voltage appl ied to thi s pin.
22 Block diagram of M C44603 Figure 8-13 Operating description o f MC44603 The input voltage Vcc (pin 1) is monitored by a com parator with hysteresis, ena bling the circuit at 14.5V and disabling the circuit below 7.5V. The error amplifier compares a voltage Vfb (pin 14) related to the output volt age of th e power suppl y, with an internal 2.
23 is switched off w hen t he current sense level exceeds the level at the output of the error amplifier. TimeON phase : A drain current will flow from the positive supply at pin 2 of the tra nsformer through the transfor mer's primary wi nding, the MO SFET and Rsens e to ground.
24 Circuit description of P816 Input circuit The input circuit consists of a lightning prote ction circuit and an EMI filte r. The lightning protection comprises R819. The EMI filter is formed by C820, L820, C 825 and C826. It prevents inflow of noise into the mains.
25 8.2.2 Troub leshoo ting P816 Figure 8-18 8.3 CD Main B oard The C D ma in board is bu ilt around the com pa ct disc mechanism V AM1250 and a load er 1250. The CDM delivers diode s ignals and a n unequalised high frequ ency signal. Thes e signals are necess a ry inpu ts fo r the decoder CD 10.
26 Figure 8-19 8.3.1 Su pply V oltages Description The CD main board receives +5V and +12V from the CDR main board via respect ively pin 16 and pin 15 of connector 1208. The +5V is split up into +5VHF and +5V. The +5VHF is used mainly for the diode currents and the HF-amplifier.
27 Pin Config ura t io n Figure 8-23 8.3.4 T DA7073A Power Drivers ( 7021, 7022) Description The TDA7073A is a dual power driver circuit for servo system s with a single supply. In this configuratio n it is used to drive the sledge, tray, fo cus and radial.
28 Motor controller truth table Figure 8-26 Hall-elements input signal voltage levels Figure 8-27 8.3.6 Tray Control Description The tray c ontrol consists of a TDA7073A power driver (7021) controlled by the processo r 7202 via pin 19 TRAYIN and pin 20 TRAYOUT.
29 8.3.7 HF Path Description The pre-amplified HF-signal is presented to both n=1 and n=2 amplifier circuits. The m ux/demux switches via software and micro processor controlled S1 and S2 lines between either one of the amplified n=1 or n =2 signals. The signal wi ll then follow another amplification and filtering circuit.
30 Transfer Characteristics Set the power and reset connec tions as described above in "1.1.1. Supply Voltages". Connect a function generator via a serial resistor of 1k 5 to pin 4 of connector 1000. Use the function generator as a sine wave generator with output level of 1Vtt.
31 Measurements Figure 8-33 Keep process or 7202 in reset by forcing pin 7 of connector 1208 to +5V. This puts the processor outputs in tristate. Check the reset at pin 4 of processor 7202 to make sure that the processor is in reset. Now, forc e port 0-4 pin 33 at 7202 to 0V to set the decoder outputs (SCLK, W CLK, DATA, and CL11).
32 9. WIRING DIAGRAM De-soldering and remove cables W651 from the loader PCB. REMARK When replace t he CDR module MAR775 to the new one. It is necessary t o add removed cables at same positions as follows; WHITE + side lead of capacitor 2424 PINK + side lead of capacitor 2430 W651 + side 2430 + side 2424 DISMOUNTING ADDITIONAL CABLES .
33 34 Connections delivered with CDR-loader assy Cable connected to tray switch and tray motor P816 POWER SUPPLY PCB 3104 128 0586 MAIN BOARD CDR 1400 1 14 1500 11 F934 1 10 1000 1220 1330 1200 1 10 1.
35 36 RC-5 M CDL 4009 LO ADER ASSY TRA Y TR+, TR- SL+, SL- SLEDGE RAD SLEDGE FOCUS TRA Y TRA YSW RAD+, RAD- FOC+, FOC- SIN+, SIN- COS+, COS- TRA Y SWITCH TURN T ABLE VRA, VFO , VSL TRA YIN, TRA Y OUT .
37 38 65 64 41 40 25 24 1 80 CY08 QY04 QY02 RY03 RY01 CT52 CT02 LT03 LT53 RY08 RY07 CT54 CT04 CT05 CT55 CN51 J652 CY12 CY11 C655 C656 C653 RT52 LY01 RY28 RY14 RY27 RY26 RY25 RY24 RY23 RY22 RY21 SF51 J.
Q891 Q801 Q810 Q825 R819 C819 D802 R832 Q851 D856 C857 J881 Q871 R823 Q801 C820 Q892 J801 G815 L820 C826 C825 D866 Q861 Q862 D832 C827 Q825 Q810 D804 D803 C803 D829 C802 C810 R810 C804 R804 R803 C829 .
41 42 J901 J902 C901 L901 L902 U030 P916 WA386K107-0 P916 J682 R685 RN55 R683 R686 RN56 R684 RN58 RN57 J681 RN51 RN52 RN53 RN54 R651 R652 R653 R654 J701 J651 J311 JT01 JT51 R311 C312 C313 R312 R313 R3.
43 44 5128 3X 8( M ) 001B 002B 003B 004B 005B x 3 030B 030B 032B 031B 037B 5128 3X 8( U ) 5128 3X 8( M ) 020B 004B 014B x 4 T E X T 025G 010G x 2 003G 002G 5128 3X 8( M ) 5128 3X 8( M ) 009G 001G 030G.
45 POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) 001B BLACK 9965 000 06363 FRONT PANEL AL BLK 386K248010 001B GO.
46 1 3 . ELECTRICAL PARTS LIST The suppliers and their type n umbers of fusible resistors are as f ollows; 1. K OA Cor poration P ar t No. (MJI) T ype No .
47 POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) P816-POWER CIRCUIT BOARD P816-CAPACITORS C801 9965 000 06375 CER. 82 pF J 500V CH DD1582055 0 C810 4822 124 40763 ELECT.
48 POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) PP16-REAR PANEL CIRCUIT BOARD PP16-CAPACITORS C301 4822 124 41539 ELECT. 47µF M 16V RA-2 OA47601620 C311 5322 122 32265 CER.
49 POS. NO VERS. COLOR PART NO. (FOR PCS) DESCRIPTION PART NO. (MJI ) S Y 1 5 4822 276 13732 PUSH SWITCH SKQNAE SP0101331 0 SY21 H/5MM 160GF VX01 9965 000 05916 DISPLAY UNIT FTD BJ 727GNK 15GRID X 22ANODE HQ31208410 XY01 4822 242 72066 SERAMIC VI B . CST8.
An important point after buying a device Marantz MAR775 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Marantz MAR775 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 Marantz MAR775 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Marantz MAR775 you will learn all the available features of the product, as well as information on its operation. The information that you get Marantz MAR775 will certainly help you make a decision on the purchase.
If you already are a holder of Marantz MAR775, 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 Marantz MAR775.
However, one of the most important roles played by the user manual is to help in solving problems with Marantz MAR775. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Marantz MAR775 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
