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Aiwa Z-KD770 Service Manual

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SERVICE MANUAL
COMPACT DISC STEREO
CASSETTE RECEIVER
SYSTEM
Z–KD770
Z–KD970
• This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
Z-KD770/KD970, (S/M Code No. 09-005-434-5T1).
• If requiring information about the CD mechanism, see Service Manual of
6ZG-1, (S/M Code No. 09-001-338-7N2).
Z-KD770
Z-KD970
BASIC TAPE MECHANISM : 2ZM-3MK2 PR5NM
BASIC CD MECHANISM : 6ZG-1 VZRDM
CD
SPEAKER
CASSEIVER
SX–ZHT730
CX–ZKD770
SX–CR677
SX–ZHT930
CX–ZKD970
SX–CR677
S/M Code No. 09-008-434-5R1
HR
HR
REMOTE
CONTROLLER
RC–ZAS08

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Summary of Contents for Aiwa Z-KD770

  • Page 1 CX–ZKD970 SX–CR677 • This Service Manual is the "Revision Publishing" and replaces "Simple Manual" Z-KD770/KD970, (S/M Code No. 09-005-434-5T1). • If requiring information about the CD mechanism, see Service Manual of 6ZG-1, (S/M Code No. 09-001-338-7N2). S/M Code No. 09-008-434-5R1...

  • Page 2: Specifications

    SPECIFICATIONS FM tuner section Compact disc player section Tuning range 87.5 MHz to 108 MHz Laser Semiconductor laser (λ =780 nm) Usable sensitivity (IHF) 13.2 dBf D-A converter 1 bit dual Antenna terminals 75 ohms (unbalanced) Signal-to-noise ratio 85 dB (1 kHz, 0 dB) Harmonic distortion 0.05 % (1 kHz, 0 dB) AM tuner section...

  • Page 3: Protection Of Eyes From Laser Beam During Servicing

    PROTECTION OF EYES FROM LASER BEAM DURING SERVICING CAUTION This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. Use of controls or adjustments or performance of procedures other than those specified herin may result in hazardous radiation expo- WARNING!! sure.

  • Page 4: Note On Before Starting Repair

    NOTE ON BEFORE STARTING REPAIR 1. Forced discharge of electrolytic capacitor of power supply block When repair is going to be attempted in the set that uses relay circuit in the power supply block, electric potential is kept charged across the electrolytic capacitors (C101, 102) even though AC power cord is removed.
  • Page 5 In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not. 2-2. Regarding reset There are cases that the machine does not work correctly because the MICROCOMPUTER is not reset even though the AC power cord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.

  • Page 6: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 87-A40-751-080 ZENER,UZ6.2BSB 87-A40-760-080 ZENER,UZ9.1BSA 87-A21-397-010 IC,STK490-070 87-A40-747-080 ZENER,UZ5.1BSB 87-A21-021-040 C-IC,BU2099FV 87-A40-438-080 ZENER,MTZJ4.7A 87-A20-783-040 C-IC,BA7762AFS 87-017-149-080 ZENER,HZS6A2L 87-A21-577-040 C-IC,M61506FP 87-A21-097-040 C-IC,M62463AFP 87-A40-749-080 ZENER,UZ5.6BSB 87-A21-482-010 IC,RPM6938-H4 87-A21-015-040 C-IC,M62491FP MAIN C.B...
  • Page 7 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C357 87-010-197-080 CAP, CHIP 0.01 DM C463 87-010-196-080 CHIP CAPACITOR,0.1-25 C358 87-010-183-080 C-CAP,S 2700P-50 B C465 87-012-141-080 CHIP-CAPACITOR,0.22-16F C359 87-010-183-080 C-CAP,S 2700P-50 B C466 87-010-194-080 CAP, CHIP 0.047 C360 87-010-183-080 C-CAP,S 2700P-50 B...
  • Page 8 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C797 87-010-405-080 CAP, ELECT 10-50V J101 87-A60-483-010 JACK,DIA6.3 BLK ST W/S KM C798 87-010-197-080 CAP, CHIP 0.01 DM J102 87-A60-238-010 TERMINAL,SP 4P (MSC) C799 87-010-407-080 CAP, ELECT 33-50V J431 87-A61-069-010 JACK,PIN 6P R/W,R/W, O/B MSC...
  • Page 9 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C412 87-010-405-040 CAP,E 10-50 C604 87-010-178-080 CHIP CAP 1000P-50 C421 87-010-197-080 CAP, CHIP 0.01-25 C606 87-015-785-080 CHIP CAPACITOR, 0.1-25 C422 87-010-182-080 C-CAP,S 2200P-50 B C607 87-010-060-040 CAP,E 100-16 C940 87-012-145-080 CAP, CHIP S 270P-50 J CH...
  • Page 10 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION S848 87-A90-095-080 SW,TACT EVQ11G04M C154 87-A11-595-080 C-CAP,S 0.056-50 K B S849 87-A90-095-080 SW,TACT EVQ11G04M C155 87-010-190-080 S CHIP F 0.01 S850 87-A90-095-080 SW,TACT EVQ11G04M C156 87-010-190-080 S CHIP F 0.01 S851 87-A90-095-080 SW,TACT EVQ11G04M...

  • Page 11: Chip Resistor Part Code

    REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION J601 87-099-659-010 JACK,6.3 JY-6314-01130 DECK C.B J602 87-099-659-010 JACK,6.3 JY-6314-01130 CON502 87-099-756-010 CONN,15P 9604S F SFR1 87-024-581-010 SFR,3.3K DIA 6H VM C.B SOL1 82-ZM1-626-010 SOL ASSY,27K SOL2 82-ZM1-626-010 SOL ASSY,27K 87-A90-248-010 SW,MICRO ESE11SH2CXQ...

  • Page 12: Transistor Illustration

    TRANSISTOR ILLUSTRATION E C B E C B E C B B C E KTA1266GR CC5551 CSC4115BC 2SB1370E KTC3198GR 2SD1933 CD1585BC 2SB1342 CSA952K FN1016 FP1016 2SD2439 2SB1588 E C B G D S E C B 2SK2158 DTC114ES 2SK3053 2SB1237Q KTC3199GR 2SA933SRS 2SA1235F...
  • Page 13 WIRING – 1 (MAIN / VM / KEY CON) – 13 –...
  • Page 14 SCHEMATIC DIAGRAM - 1 (MAIN 1/4 : AMP / VM) – 14 –...
  • Page 15 SCHEMATIC DIAGRAM - 2 (MAIN 2/4 : DECK / HEAD-1 / HEAD-2 / KEY-CON) – 15 –...
  • Page 16 SCHEMATIC DIAGRAM - 3 (MAIN 3/4 : TUNER) – 16 –...
  • Page 17 SCHEMATIC DIAGRAM - 4 (MAIN 4/4 : PROLOGIC) – 17 –...
  • Page 18 WIRING – 2 (MICON) – 18 –...
  • Page 19 SCHEMATIC DIAGRAM - 5 (MICON/DECK) – 19 –...
  • Page 20 WIRING – 3 (CNTL) – 20 –...
  • Page 21 SCHEMATIC DIAGRAM - 6 (CNTL/KEY CD/DK1 LED/KD2 LED/MIC) – 21 –...
  • Page 22 WIRING – 4 (KEY CD / DK1 LED / DK2 LED / MIC) – 22 –...
  • Page 23 WIRING – 5 (AMP 1F) – 23 –...
  • Page 24 SCHEMATIC DIAGRAM - 7 (AMP 1F) – 24 –...
  • Page 25 WIRING – 6 (AMP 2F) – 25 –...
  • Page 26 SCHEMATIC DIAGRAM - 8 (AMP 2F) – 26 –...
  • Page 27 WIRING – 7 (PT) – 27 –...
  • Page 28 SCHEMATIC DIAGRAM - 9 (PT) – 28 –...
  • Page 29 WIRING – 8 (DECK / HEAD-1 / HEAD-2) – 29 –...

  • Page 30: Ic Block Diagram

    IC BLOCK DIAGRAM – 30 –...
  • Page 31 – 31 –...
  • Page 32 – 32 –...
  • Page 33 < DECK SECTION > < TUNER SECTION > 1. Clock frequency Check 8. Tape Speed Adjustment (DECK 2) Settings : • Test point : TP2 (CLK) Settings : • Test tape : TTA–100 Method : Set to AM 1602kHz and check that the test point is •...
  • Page 34 IC DESCRIPTION IC, LC876580W-5R55 Pin No. Pin Name Description M-CLK Common serial clock. M-DATA Common serial data. M-STB Common serial strobe. PLL-CE Tuner PLL IC chip enable. SR-LCK Shift register IC LATCH clock. RYM-CS RHYTHM IC chip select. POWER Audio power ON/OFF. MUTE System MUTE ON/OFF.
  • Page 35 Pin No. Pin Name Description P28/DSP FL segment P28 output / DSP function detection. "L" : ON (Not used). P27/RHYTHM FL segment P27 output / RHYTHM function detection. "H" : ON P26/KEYCON FL segment P26 output / KEYCON function detection. "H" : ON P25/5MODE FL segment P25 output / GEQ 5MODE select.
  • Page 36 FL (BJ751GNK) GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT – 36 –...
  • Page 37 ANODE CONNECTION – 37 –...

  • Page 38: Cd Test Mode

    CD TEST MODE 1. Starting Up the CD Test Mode While pressing the “CD” button, connect the AC plug to the power outlet. When the CD test mode starts up, it displays “TEST” and all displays will turn on (Start Mode) in approximately 15 seconds. 2.

  • Page 39: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1 / 1 – 39 –...

  • Page 40: Mechanical Parts List

    22 87-NF4-216-010 HLDR,LOCK 1 67 8A-MA3-046-010 PANEL,SIDE R 3 23 8A-MAP-110-010 PLATE,DPL A 87-078-060-010 BVIT3PB+3-10 24 87-B00-002-010 BADGE,AIWA 30 ABS SIL B 87-591-095-410 TAPPING SCREW, QIT+3-8 (GLD) 25 8A-MA3-093-010 KNOB ASSY,RTRY JOG C 87-NF4-224-010 S-SCREW,IT3B+3-8 CU 26 8A-MGP-030-010 PANEL,FR VCD P...

  • Page 41: Tape Mechanism Exploded View

    TAPE MECHANISM EXPLODED VIEW 1 / 1 PH(DECK 1) RPH(DECK 2) DECK C.B CUSH-G, DIA 3.7-8-3.25 CUSH-G, HLDR,IC DIA 3.7-8-3.25 HLDR,IC CAPSTAN 2.2-41.7 CAPSTAN 2-41.5 HEAD 1 C.B(DECK 1) HEAD 2 C.B(DECK 2) BELT D2 (DECK 1) (DECK 1) (DECK 2) (DECK 2) PLATE, SHLD M3...

  • Page 42: Tape Mechanism Parts List

    TAPE MECHANISM PARTS LIST 1 / 1 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 1 82-ZM3-301-610 CHAS ASSY,M2 31 82-ZM1-255-310 SPR-E,LVR DIR 2 82-ZM1-258-210 SPR-T,PINCH L 32 82-ZM3-305-210 GEAR,CAM M2 3 82-ZM1-341-210 LVR ASSY,PINCH L2 33 82-ZM1-227-310 LVR,TRIG 4 82-ZM1-333-210...
  • Page 43 SPEAKER DISASSEMBLY INSTRUCTIONS Type.1 Type.4 Insert a flat-bladed screwdriver into the position indicated by the TOOLS arrows and remove the panel. Remove the screws of each speaker 1 Plastic head hammer unit and then remove the speaker units. 2 (() flat head screwdriver 3 Cut chisel How to Remove the PANEL, FR Type.2...

  • Page 44: Accessories / Package List

    PANEL,FR 2 8A-MSF-002-010 RING,W 3 8A-MSF-003-010 PLATE,NAME 4 8A-MSF-004-010 PROTECTOR,TW 5 8A-MSF-005-010 GRILLE,FRAME ASSY 6 8A-NSJ-006-010 BADGE,AIWA S35 7 8A-MSD-601-010 SPKR,W 200 8 8A-MS2-605-110 SPKR,TW 60 9 88-NSK-610-010 SPKR,CERAMIC ASSY 10 87-NS7-611-010 CORD,SPKR SPEAKER PARTS LIST (SX-CR677 <YJSTC, YJ7STL>) NOTE: This SX-CR677 speaker contains SX-C607 (center speaker) and SX-R277 (surround speaker).
  • Page 45 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 9301978 9630472 0251431 Printed in Singapore...

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