Marantz MAR770 manual

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. Recordable ReWritable SOURCE REC TYPE CLOSE OPEN/ CLOSE OPEN/ ERASE FINALIZE POWER[...]

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 . P ar ts for your MARANTZ equipment are gener ally av ailable to our[...]

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). 1.2 OPENING THE PRODUCT : The pr[...]

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 . A module exchange procedure will be set up for this purpose. The module can be removed from the product by removing 4 screws and the transformer (see demounting the CDR mod[...]

3 2 TECHNICAL SPECIFICA TIONS GENERAL System .................................................................................................... Compact disc digi tal audio Number of channels ................................................................................ 2 (stereo) Applicable discs ................................................[...]

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. Keep components and tools at this potential. ATTENTION Tous l[...]

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. diameter disc (58.0 mm) 4822 397 60141 Torx screwdrivers Set (straight) 4822 395 50145 Set (square) 4822 395 50132 13th order filter 482[...]

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.. This mode disables the open/clo se function of the pla yer. The dealer mode can be switched on and off pressing keys [OPEN/CLOSE] and [STOP] of the CDR player simultaneously while switch[...]

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, switch power OFF Load CD-DA disc (SB C444A) Press <PLA Y> + <F FWD> simul taneously and switc h ON unit Display : "PLAYER ID" &[...]

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. A sequence of tests is executed automatically.[...]

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. The display reads "BUSY". Sledge contro l test After pressing [F [...]

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 INSERT DISC PRESS < OPEN/CLOSE > DISPLAY? DISPLAY: "INSERT DISC" CD-DA DISC LOADED? CHECK: POWER SU PPLY (SEE FAULT FINDING GUIDE PSU) W[...]

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.O.C. INFO? YES DISC DETE[...]

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? NO YES DIGITAL IN? OPTICAL IN? NO YES RECORDING SUCCESS FUL? NO YES NO YES DISPLAY: “ CD R ” & OPC INFO? YES DISC DETECTION & READING? 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 RW ” & OPC INFO? YES DISC DETECTION & READING? ELECTR ICAL SER VICE DIAGNO STICS: REPLA CE CDR MODULE IF "DERRn" OR "BERRn&q[...]

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 FLEX CONNECTI ON FROM CDR MAIN BOARD PO W ER SUPPL Y +5V, +12V AT TESTPOINTS 28 AND 27 +5V AT I C7005 PIN 14 +3V3 AT IC7000 P INS 5,17,21,57, CHECK SAFET[...]

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. 2896MHz PIN 11 : MUTE HIGH? TESTPOINTS 23, 24 : ANALOG OUTPUT? REPLACE DAC 7309 OPAMP 7120 TESTPOINTS 23, 24 : ANALOG OUTPUT? PO W ER SU PPLY: PIN 8 12V REPLACE [...]

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. The com munication protocol us[...]

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. JY01 Voltages VFTD, VDC1 and VDC2 are produced in the power supply uni[...]

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. Turning the knob clockwise briefly c[...]

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. JY01-10 CLOCK SIGNAL 8Mhz at pins 8, 9 of QY01 CONTROL SIGNALS RESE[...]

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. Through cont rol of the swi tch-o n time , th e energy tr ansfe rred in [...]

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. 3 Output Peak c urrents up to 750 m A c an be sourced or s unk, s uitable f or driving eit h[...]

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 2.5V r[...]

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. As the positive voltage at pin 2 of t he transformer is constant[...]

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. Primary r ectifier/smoothing The AC input is rectified by rectifier bridge D802 an[...]

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. Based on these s ignals the dec od er will c ontrol t[...]

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. The +5V is used for the digital part of the board. On the board a +3V3[...]

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. Measurements Keep microproc essor 7202 in res et by forcing pin 7 of connector 1208 to +5V. [...]

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. If pin 20 is low and pin 19 high, the TRAY+ signal at pin 16 of 70 21 is forced to +8V a[...]

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. The filtering again is co[...]

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. Check this AC value with an AC m V-meter c onnected to the in[...]

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). Check the MUTE p[...]

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 11 Flex connected to CDM Flex connected to sledge motor Flex connected to turn table motor 1 4 1 30 1 1410 1 3 PP16 TERMINAL PCB 1 22 1 22 1006 1 11 [...]

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 TRA YSWF REFSIN, SINPHI, REFCOS, COSPHI CDM3800 7240 7225 PCS PRE-AMP NE532D PO WER DRIVER BA5938FM HALL M OTOR DRIVER BA6856FP 7330 FLASH EPROM 7208 [...]

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 JT52 JT02 J301 J682 JY01 J902 JJ01 VX01 RY11 RY15 C683 Q681 RN58 RN57 RN56 RN55 QN58 QN56 QN55 QN57 R686 R685 R684 R683 R682 R681 C682 C681 C702 C701 Q[...]

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 C801 D806 D807 L832 C813 R808 D814 R801 C809 R815 R814 R807 R883 R884 R885 C882 R881 R886 D871 R887 R891 R892 C892 R893 C867 C891 C876 C864 C852 D851 [...]

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 R314 Q311 RT01 CT01 RT02 LT02 CT02 CT52 LT52 C301 CT03 CT53 JF51 DF51 QF51 QF52 RF51 RF52 RF53 RF54 RF55 RF56 RF57 JF52 Q681 RT52 RT51 CT51 C683 JJ01 QN[...]

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 031G 050B 026G 5128 3X 8( M ) 021G 021G 021G 047G 991G NO N L Y 991G UO N L Y 009G 5126 3X 8( M ) 5128 3X 8( M ) 001D 5110 3X 6( M ) 5128 3X 8 ( M ) [...]

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 GOLD 9964 000 06396 FRONT PANEL AL GLD 386K248110 002B 4822 454 11825 BADGE MARANTZ BL PAINT 185J251010 003B 9965 000 01393 LENS STANDBY LED 312J355010 [...]

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 . (KO A) Description NH05 × × × 140 RF25S × × × × Ω J( ± 5% 1/4W) NH05 × × × 120 RF50S × × × × Ω J( ± 5% 1/2W) NH85 × × × 110 RF73B2A × × × × Ω J( ± 5% 1/10W) NH95 ×[...]

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. 2.2µF M 50V RA-2 OA22505020 C811 4822 122 40617 CER. 0.1µF +80%-20% 50V DC DD38104010 C814[...]

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. 100pF J CH 50V BLK DD15101300 C312 4822 122 40617 CER. 0.1µF +80%-20% 50V DC DD3810401[...]

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 . CST8.0MHZ MT FQ0800401 0 ZY01 4822 130 11494 IR SENSOR RPM6936-V4 HW10004210 PY26-KEY CIRCUIT BOARD[...]