Aiwa NSX-VC78 Service Manual Download

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SERVICE MANUAL

COMPACT DISC STEREO

CASSETTE RECEIVER

BASIC TAPE MECHANISM : 2ZM-3MK2 PR4NM
BASIC CD MECHANISM : AZG-1 VZD3RDM

NSX-VC78

S/M Code No. 09-006-431-0R1

REVISION

•

This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
NSX-VC78 (HR), (S/M Code No. 09-003-431-0T1).

•

If requiring information about the CD mechanism, see Service Manual of

AZG-1, (S/M Code No. 09-001-335-3NG).

• This Service Manual does not include “CD TEST MODE”. This item will

be issued in the next Supplement.

NSX–VC78

MAIN

SPEAKER

SYSTEM

CASSEIVER

REMOTE

CONTROLLER

RC–ZAS07

CX–NVC78

SX–WNSZ70

Summary of Contents for NSX-VC78

Page 1: ...rvice Manual is the Revision Publishing and replaces Simple Manual NSX VC78 HR S M Code No 09 003 431 0T1 If requiring information about the CD mechanism see Service Manual of AZG 1 S M Code No 09 001 335 3NG This Service Manual does not include CD TEST MODE This item will be issued in the next Supplement NSX VC78 MAIN SPEAKER SYSTEM CD CASSEIVER REMOTE CONTROLLER RC ZAS07 CX NVC78 SX WNSZ70 ...

Page 2: ...tion Track format 4 tracks 2 channels stereo Frequency response CrO2 tape 50 Hz 16000 Hz Normal tape 50 Hz 15000 Hz Recording system AC bias Heads Deck 1 Playback head x 1 Deck 2 Recording Playback head x 1 erase head x 1 SPECIFICATIONS Compact disc player section Laser Semiconductor laser λ 780 nm D A converter 1 bit dual Signal to noise ratio 85 dB 1 kHz 0 dB Harmonic distortion 0 05 1 kHz 0 dB ...

Page 3: ...araten används på annat sätt än vad som specificeras i denna bruksanvising kan användaren utsättas för osynling laserstrålning som överskrider gränsen för laserklass 1 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING CAUTION Use of controls or adjustments or performance of proce dures other than those specified herin may result in hazardous radiation exposure ATTENTION L utillisation de command...

Page 4: ...in power 2 2 2 2 2 Confirm that the main power is turned on and the HOLD terminal of the MICROCOMPUTER keeps the H level or not 3 3 3 3 3 When the HOLD terminal is L level the abnormality detection circuit is judged to be working correctly and the MICROCOMPUTER is judged to be good 1 Forced discharge of electrolytic capacitor of power supply block When repair is going to be attempted in the set th...

Page 5: ... ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers 3 3 3 3 3 Connect the AC power cord again If the MICROCOMPUTER returns to the normal operation the MICROCOMPUTER is good Note The reference number or MICROCOMPUTER pin number of transistor Q110 and electrolytic capacitor C113 can change depending on the models Be sure to check the reference numbers...

Page 6: ...V C35 87 010 406 080 CAP ELECT 22 50V C36 87 010 381 080 CAP ELECT 330 16V C38 87 010 394 080 CAP ELECT 220 35V C39 87 010 394 080 CAP ELECT 220 35V C40 87 010 197 080 CAP CHIP 0 01 DM C60 87 010 403 080 CAP ELECT 3 3 50V C80 87 010 401 080 CAP ELECT 1 50V C81 87 010 260 080 CAP ELECT 47 25V C82 87 010 380 080 CAP ELECT 47 16V C104 87 010 196 080 CHIP CAPACITOR 0 1 25 C105 87 010 196 080 CHIP CAPA...

Page 7: ... 50 J C637 87 A10 307 080 CAP M 0 1 50 J C638 87 A10 307 080 CAP M 0 1 50 J C639 87 010 405 080 CAP ELECT 10 50V C641 87 010 401 080 CAP ELECT 1 50V C642 87 010 401 080 CAP ELECT 1 50V C643 87 010 196 080 CHIP CAPACITOR 0 1 25 C644 87 010 401 080 CAP ELECT 1 50V C671 87 010 322 080 C CAP S 100P 50 CH C672 87 010 322 080 C CAP S 100P 50 CH C673 87 010 197 080 CAP CHIP 0 01 DM C679 87 010 196 080 CH...

Page 8: ...0 441 050 RES 270 1 2W J RP R164 87 A00 441 050 RES 270 1 2W J RP R790 87 010 197 080 CAP CHIP 0 01 DM R991 87 010 322 080 C CAP S 100P 50 CH R993 87 010 322 080 C CAP S 100P 50 CH R995 87 010 322 080 C CAP S 100P 50 CH SFR351 87 A90 433 080 SFR 50K H NVZ6TLTA SFR352 87 A90 433 080 SFR 50K H NVZ6TLTA TC941 87 011 254 080 TRIMMER CER 20P 4 0X4 5 ECR TC943 87 011 253 080 TRIMMER CER 30P 4 0X4 5 ECR ...

Page 9: ...80 SW TACT KSHG611BT S325 87 A91 024 180 SW TACT KSHG611BT S326 87 A91 024 180 SW TACT KSHG611BT S327 87 A91 024 180 SW TACT KSHG611BT S328 87 A91 024 180 SW TACT KSHG611BT S329 87 A91 024 180 SW TACT KSHG611BT S330 87 A91 024 180 SW TACT KSHG611BT S331 87 A91 024 180 SW TACT KSHG611BT S332 87 A91 024 180 SW TACT KSHG611BT S333 87 A91 024 180 SW TACT KSHG611BT S334 87 A91 024 180 SW TACT KSHG611BT...

Page 10: ... 87 A10 627 000 CAP E 2200 50 M SMG C8 87 A11 148 080 CAP TC U 0 1 50 Z F C9 87 A11 148 080 CAP TC U 0 1 50 Z F C10 87 A11 148 080 CAP TC U 0 1 50 Z F C11 87 A11 148 080 CAP TC U 0 1 50 Z F C12 87 016 657 090 CAP E 3300 71 C13 87 016 657 090 CAP E 3300 71 C16 87 010 403 080 CAP ELECT 3 3 50V CN1 87 A61 110 010 CONN 9P V TID A CN2 87 A61 108 010 CONN 5P V TID A PT1 8A NF7 622 010 PT ANF 7 H PT2 8A ...

Page 11: ...2SA1235F 2SC2714O 2SC3052F CMBT5551 CMBT5401 CSD1306E RT1N141C RT1P141C RT1P144C RT1P441C 2SA933SRS E B C KTA1266GR KTC3198GR KTC3199GR CSA952K CD1585BC CSC4115BC E C B DTC114ES E C B 2SB1370E B C E 2SK2158 2SJ461 T1 2SK360E D S G ...

Page 12: ...WIRING 1 MAIN VM 12 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 A B C D E F G H I J K L M N O P Q R S T U 1 2 3 4 5 6 7 8 9 25 26 27 28 29 30 31 32 ...

Page 13: ... 13 SCHEMATIC DIAGRAM 1 MAIN 1 3 AMP VM ...

Page 14: ... 14 SCHEMATIC DIAGRAM 2 MAIN 2 3 DECK HEAD 1 HEAD 2 ...

Page 15: ... 15 SCHEMATIC DIAGRAM 3 MAIN 3 3 TUNER ...

Page 16: ...WIRING 2 FRONT 16 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 A B C D E F G H I J K L M N O P Q R S T U 1 2 3 4 5 6 7 8 9 25 26 27 28 29 30 31 32 ...

Page 17: ... 17 SCHEMATIC DIAGRAM 4 FRONT DECK ...

Page 18: ...WIRING 3 AMP 18 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 A B C D E F G H I J K L M N O P Q R S T U 1 2 3 4 5 6 7 8 9 25 26 27 28 29 30 31 32 ...

Page 19: ... 19 SCHEMATIC DIAGRAM 5 AMP ...

Page 20: ...WIRING 4 KEY CON 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U ...

Page 21: ... 21 SCHEMATIC DIAGRAM 6 KEY CON ...

Page 22: ...WIRING 5 PT 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U ...

Page 23: ... 23 SCHEMATIC DIAGRAM 7 PT ...

Page 24: ...WIRING 6 DECK HEAD 1 HEAD 2 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U ...

Page 25: ... 25 IC BLOCK DIAGRAM ...

Page 26: ... 26 ...

Page 27: ... 27 ...

Page 28: ... 28 FL BJ754GNK GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT ...

Page 29: ... 29 ANODE CONNECTION ...

Page 30: ...SIG MS I RDS data input not used DECK MS detect input 27 I TM BASE I Time base clock 8Hz input 28 I WRQ RDS CLK I CD WRQ input RDS clock input not used 29 I RMC I Remote control signal input Active L 30 42 G13 G1 O FL grid G13 G1 output 43 45 P35 P33 O FL segment P35 P33 output 46 VDD3 Power supply 47 P32 SPEANA A O FL segment P32 output Spectrum analyzer band select output A 48 P31 SPEANA B O FL ...

Page 31: ...witch input 70 P10 CST1 O I FL segment P10 output Deck 1 cassette detect switch input 71 P9 REA O I FL segment P9 output Deck side A record permission switch input 72 VDD4 Power supply 73 P8 AC DEMO O I FL segment P8 output Demo less diode input 74 80 P7 1P O FL segment output P7 1P 81 NC Not connected 82 O TRAY CLOSE O CD tray close output 83 O TRAY OPEN O CD tray open output 84 I SUBQ O CD SUBQ ...

Page 32: ...Settings Test point TP8 Lch TP9 Rch Ajustment location L941 5 9MHz TC943 17 9MHz Method Set up TC943 to center before adjustment Adjust L941 so that level at 5 9MHz becomes maximum Then adjust TC943 so that the level at 17 9MHz becomes maximum 6 FM VT Check Settings Test point TP1 VT Method Set to FM 108 0MHz and check that the test point is less than 8 0V Then set to FM 87 5MHz and check that the...

Page 33: ... 33 SFR352 5 SFR351 IC601 2 3 4 6 5 1 TP10 LCH TP11 RCH IC303 2 2 DECK 1 P DECK 2 R P E HEAD CN351 7 GND A MAIN C B TP5 8 FL201 IC101 L101 TP6 GND K SCAN 100 B FRONT C B SFR1 1 G DECK C B ...

Page 34: ...nt TP10 Lch TP11 Rch Input signal 1kHz 10kHz LINE IN Adjustment location SFR351 Lch SFR352 Rch Method Apply a 1kHz signal and REC mode Then adjust OSC attenuator so that the output level at the test points becomes 9 0mV Record and play back the 1kHz and 10kHz signals and adjust SFRs so that the output level of the 10kHz signals becomes 0dB 1 0dB with respect to that of the 1kHz signal 6 REC PB Fre...

Page 35: ...E BINDER WIRE F H E E C A A A A A A A A B G A A D F 30 HT SINK HT SINK PLATE EARTH MECHA CHAS MAIN 1 2 3 4 5 6 7 7 8 9 10 10 11 12 13 14 15 16 17 18 19 20 21 23 22 24 25 26 AZG 1 44 45 46 47 48 49 50 52 53 54 55 56 57 58 29 41 42 31 FL 27 28 32 33 34 37 36 35 38 39 35 40 2ZM 3MK2 36 43 a a P C B A 51 60 ...

Page 36: ... LEFT V 2 25 8A NF8 006 010 WINDOW TOP 26 8A NF8 005 010 PANEL TOP 27 8A NF7 035 010 KEY ASSY FUN 28 8A NF7 026 010 KEY ASSY OPE 29 8A NF7 209 010 HLDR PWB M BTM 30 8A NF7 251 010 W 3 28 0 45 31 87 NF5 203 110 GUIDE FL 32 85 NF5 618 010 CABLE FFC 13P 1 25 33 88 915 111 110 FF CABLE 15P 1 25 34 8A NF7 021 010 KEY BBE 35 82 NF5 229 010 PLATE LOCK 36 86 NF9 224 010 SPR C LOCK 37 87 NF4 216 010 HLDR L...

Page 37: ... 37 TAPE MECHANISM EXPLODED VIEW 1 1 ...

Page 38: ...243 010 LVR STOP 27 82 ZM1 344 010 LVR ASSY PINCH R2 28 82 ZM1 259 210 SPR T PINCH R 29 82 ZM1 240 110 LVR REC 30 80 ZM6 243 010 SH 1 75 3 6 0 5 SLT 31 82 ZM1 255 310 SPR E LVR DIR 32 82 ZM3 305 210 GEAR CAM M2 33 82 ZM1 227 310 LVR TRIG 34 82 ZM3 306 110 LVR FR M2 35 82 ZM1 265 310 SPR E TRIG 36 82 ZM3 339 110 SHAFT COUPLER N3 37 86 ZM1 206 010 BELT MAIN L 38 82 ZM1 322 010 SPR T FR 60 39 82 ZM1 ...

Page 39: ...rning to clockwise direction until click sound comes out Remove the grill frame and four pieces of rubber caps by pulling out with a flat bladed screwdriver Remove the screws from hole where installed rubber caps Insert a flat bladed screwdriver into the position indicated by the arrows and remove the panel Re move the screws of each speaker unit and then remove the speaker units TOOLS 1 Plastic h...

Page 40: ...A NS7 017 010 PROTECTOR 6 88 NS5 610 010 CORD SPKR 7 88 NS5 611 010 CORD SPKR B L 8 8A NS7 001 010 PANEL FR 9 8A NS7 004 010 PANEL DUCT 10 8A NS7 005 010 GRILLE FRAME ASSY 11 8A NSJ 006 010 BADGE AIWA S35 ACCESSORIES PACKAGE LIST KANRI NO REF NO DESCRIPTION PART NO 1 8A NH7 901 010 IB H EC H MVC78 2 87 A90 119 010 ANT WIRE SW 5M 3 87 006 226 010 AM LOOP ANT C0 4 87 043 115 010 ANT FEEDER FM 5 87 A...

Page 41: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 JAPAN TEL 03 3827 3111 Printed in Singapore 9301978 0251431 ...

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