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Aiwa NSX-T77 Service Manual

Compact disc stereo cassette receiver
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SERVICE MANUAL
COMPACT DISC STEREO
CASSETTE RECEIVER
SYSTEM
NSX–T77<HR>
NSX-T77<K>
• This Service Manual is the "Revision Publishing" and replaces
"Simple Manual" NSX-T77<HR,K> (S/M Code No. 09-005-425-2T5).
• If requiring information about the CD mechanisim, see Service Manual
of 6ZG-1 (S/M Code No. 09-001-338-7N2).
CD–CASSEIVER
CX–NT77
SX–WNT99
CX-NT77
SX-WNT77
S/M Code No. 09-007-425-2R3
NSX-T77
BASIC TAPE MECHANISM: 2ZM-3MK2 PR4NM
BASIC CD MECHANISM: 6ZG-1 ZRNDM
REMOTE CONTROLLER
SPEAKER
HR,K
RC–ZAS04

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  • Page 1 CX-NT77 SX-WNT77 • This Service Manual is the “Revision Publishing” and replaces “Simple Manual” NSX-T77<HR,K> (S/M Code No. 09-005-425-2T5). • If requiring information about the CD mechanisim, see Service Manual of 6ZG-1 (S/M Code No. 09-001-338-7N2). S/M Code No. 09-007-425-2R3...

  • 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 83 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 This set employs laser. Therefore, be sure to follow carefully CAUTION the instructions below when servicing. Use of controls or adjustments or performance of proce- dures other than those specified herin may result in WARNING!! hazardous radiation exposure.

  • 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 ELETRICAL MAIN PARTS LIST REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 87-A40-488-080 DIODE,1SS244 87-A40-747-080 ZENER,UZ5.1BSB 8A-NF3-635-010 C-IC,LC876596W-5P49 87-A40-751-080 ZENER,UZ6.2BSB 87-A21-482-010 IC,RPM6938-H4 87-A40-646-010 DIODE,FMB-G16L 87-A20-869-040 C-IC,M62449FP 87-A40-438-080 ZENER,MTZJ4.7A 87-A21-397-010 IC,STK490-070<K> 87-A21-398-010 IC,STK490-110<HR> 87-A40-749-080 ZENER,UZ5.6BSB<HR> 87-A40-618-080 VARI-CAP,SVC 348(S/T)<HR> 87-A20-355-010 IC,CXA1553P 87-017-149-080...
  • Page 7 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C324 87-010-260-080 CAP, ELECT 47-25V C618 87-010-401-080 CAP, ELECT 1-50V C325 87-010-370-080 CAP,E 330-6.3 SME C619 87-010-263-080 CAP, ELECT 100-10V C327 87-010-404-080 CAP, ELECT 4.7-50V C620 87-016-669-080 C-CAP,S 0.1-25 K B C328 87-010-404-080 CAP, ELECT 4.7-50V...
  • Page 8 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION C820 87-010-179-080 CAP,CHIP S B1200P 87-A60-996-010 CONN,13P V BLK TAC-L13X-A3 C821 87-010-405-080 CAP, ELECT 10-50V CN91 87-A60-619-010 CONN,2P V 2MM JMT C823 87-012-349-080 C-CAP,S 1000P-50 CH<K> CN92 87-A60-619-010 CONN,2P V 2MM JMT C823 87-010-177-080...
  • Page 9 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 87-A90-510-010 HLDR,WIRE 2.5-9P CN101 87-099-720-010 CONN,30P TYK-B(P) X861 87-A70-091-010 VIB,XTAL 4.332MHZ CSA-309<K> CN102 87-A60-054-010 CONN,14P V 9604S-14C X991 87-A70-061-010 VIB,XTAL 4.500MHZ CSA-309 CN103 87-099-750-010 CONN,15P V 9604SC CN601 87-A60-062-010 CONN,05P V 9604S-05C CN701...
  • Page 10 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION S216 87-A90-095-080 SW,TACT EVQ11G04M C255 87-010-190-080 S CHIP F 0.01 S217 87-A90-095-080 SW,TACT EVQ11G04M C256 87-010-190-080 S CHIP F 0.01 S221 87-A90-095-080 SW,TACT EVQ11G04M C300 87-010-260-080 CAP,E 47-25 M 11L SME S222 87-A90-095-080 SW,TACT EVQ11G04M...
  • Page 11 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 87-A90-976-010 RELAY,AC12V SDT-S-112LMR<K> JW316 87-A90-896-080 F-BEAD, 035600STY7 87-A91-300-010 RELAY,AC 12V-ALA2PF12<HR> L101 87-A50-333-010 COIL,OSC 9.43MHZ 87-A90-165-010 SW,SL 1-2-3 SWS2301<HR> LED311 87-A40-380-180 LED,SEL6510C-TP5 GRN 87-A60-317-010 TERMINAL, 1P MSC LED312 87-A40-380-180 LED,SEL6510C-TP5 GRN 87-A60-317-010 TERMINAL, 1P MSC...

  • Page 12: Chip Resistor Part Code

    CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure Resistor Code Value of resistor Chip resistor Dimensions (mm) Wattage Type Tolerance Symbol Resistor Code Form 1/16W 1005 0.35 1/16W 1608 0.45 1/10W 2125 1.25 0.45 1/8W 3216 0.55 TRANSISTOR ILLUSTRATION E C B E C B E C B...
  • Page 13 WIRING - 1 (MAIN / GEQ / VM)<HR> - 13 -...
  • Page 14 SCHEMATIC DIAGRAM - 1 (MAIN 1 / 3 / VM)<HR> - 14 -...
  • Page 15 SCHEMATIC DIAGRAM - 2 (MAIN 2 / 3: DECK / HEAD-1 / HEAD-2)<HR> - 15 -...
  • Page 16 SCHEMATIC DIAGRAM - 3 (MAIN 3 / 3: TUNER)<HR> - 16 -...
  • Page 17 SCHEMATIC DIAGRAM - 4 (GEQ)<HR> - 17 -...
  • Page 18 WIRING - 2 (MAIN / GEQ / VM)<K> - 18 -...
  • Page 19 SCHEMATIC DIAGRAM - 5 (MAIN 1 / 3 / VM)<K> - 19 -...
  • Page 20 SCHEMATIC DIAGRAM - 6 (MAIN 2 / 3: DECK / HEAD-1 /HEAD-2)<K> - 20 -...
  • Page 21 SCHEMATIC DIAGRAM - 7 (MAIN 3 / 3: TUNER)<K> - 21 -...
  • Page 22 SCHEMATIC DIAGRAM - 8 (GEQ)<K> - 22 -...
  • Page 23 WIRING - 3 (DISPLAY / CD KEY) - 23 -...
  • Page 24 SCHEMATIC DIAGRAM - 9 (DISPLAY/ CD KEY/ DECK) - 24 -...
  • Page 25 WIRING - 4 (CONTROL / VOLUME / MIC) - 25 -...
  • Page 26 SCHEMATIC DIAGRAM - 10 (CONTROL / VOLUME / MIC) - 26 -...

  • Page 27: Wiring - 5 (Amp)

    WIRING - 5 (AMP) - 27 -...
  • Page 28 SCHEMATIC DIAGRAM - 11 (AMP) - 28 -...
  • Page 29 WIRING - 6 (PT)<HR> - 29 -...

  • Page 30: Schematic Diagram - 12 (Pt)

    SCHEMATIC DIAGRAM - 12 (PT)<HR> - 30 -...
  • Page 31 WIRING - 7 (PT)<K> - 31 -...

  • Page 32: Schematic Diagram - 13 (Pt)

    SCHEMATIC DIAGRAM - 13 (PT)<K> - 32 -...
  • Page 33 WIRING - 8 (DECK) - 33 -...

  • Page 34: Ic Block Diagram

    IC BLOCK DIAGRAM - 34 -...
  • Page 35 - 35 -...
  • Page 36 - 36 -...
  • Page 37 FL (BJ752GK-ANF3) GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT - 37 -...
  • Page 38 ANODE CONNECTION - 38 -...
  • Page 39 IC DESCRIPTION IC, LC876596W-5P49 Description Pin No. Pin Name Common serial CLOCK output. DATA Common Serial DATA output. Common serial STROBE output. CS-RHYTHM Rhythm IC chip select output. GEQ-CE GEQ IC chip enable output. HP-MUTE Headphone plug-in detect input. (Output "L" at HOLD) O-POWER System power ON/OFF output.
  • Page 40 Pin No. Pin Name Description P19/K-CON FL segement P19 output / K-CON select diode input (not used). P18/RDS FL segement P18 output / RDS select diode input (K only). P17/FM1 FL segment P17 output / FM1 select diode input (not used). P16/SW FL segment P16 output / SW step initial diode input (HR only).
  • Page 41 ADJUSTMENT < TUNER SECTION >(HR) < TUNER SECTION >(K) 1. Clock Frequency Check 1. Clock Frequency Check Settings : • Test point : TP6 (CLK) Settings : • Test point : TP6 (CLK) Method : Set to MW 1602kHz and check that the test Method : Set to MW 1602kHz and check that the test point is point is 2052kHz ±...
  • Page 42 < DECK SECTION > 8. Tape Speed Adjustment (DECK 1, DECK 2) 13. REC/PB Frequency response Check (DECK 2) Settings : • Test tape : TTA–100(3kHz) Settings : • Test tape : TTA-615 (CrO • Test point : TP9(Rch), TP10(Lch) •...

  • Page 43: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1 / 1 - 43 -...

  • Page 44: Mechanical Parts List

    MECHANICAL PARTS LIST 1 / 1 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 1 88-NF3-090-010 RING,FOOT 42 8A-NF3-201-010 GUIDE,LED-FUNC 43 8A-NF3-213-110 HLDR,HT-SINK L 2 8A-NF3-042-010 PANEL ASSY,TRAY 3 8A-NF3-029-010 BOX,CASS R 44 8A-NF3-214-010 HLDR,HT-SINK R 45 8A-NF3-210-010 HLDR,SIDE L 4 8A-NF3-040-010...

  • Page 45: Tape Mechanism Exploded View

    TAPE MECHANISM EXPLODED VIEW 1 / 1 PH(DECK 1) RPH(DECK 2) DECK C.B SOL 2 SOL 1 (DECK 2) (DECK 1) HEAD 1 C.B(DECK 1) HEAD 2 C.B(DECK 2) (DECK 1) (DECK 1) (DECK 2) (DECK 2) - 45 -...

  • Page 46: Tape Mechanism Parts List

    TAPE MECHANISM PARTS LIST 1 / 1 REF. NO. PART NO. KANRI DESCRIPTION REF. NO. PART NO. KANRI DESCRIPTION 1 82-ZM3-301-510 CHAS ASSY,M2 2 82-ZM1-258-110 SPR-T,PINCH L 3 82-ZM1-341-110 LVR ASSY,PINCH L2 38 82-ZM1-322-010 SPR-T,FR60 4 82-ZM1-333-010 PLATE,LINK 2 39 82-ZM1-220-210 GEAR,IDLER 5 82-ZM1-266-11K LVR,DIR...
  • Page 47 SPEAKER DISASSEMBLY INSTRUCTIONS Type.1 Type.4 TOOLS Insert a flat-bladed screwdriver into the position indicated by the 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 48: Accessories / Package List

    2 8A-NS3-002-010 PANEL,TW L 12 88-NS5-610-010 CORD,SPKR 3 8A-NS3-003-010 PANEL,TW R 13 88-NS5-611-010 CORD,SPKR B/L 4 8A-NS3-006-010 PANEL,TOP 14 8A-NSJ-006-010 BADGE,AIWA S35 5 8A-NS3-009-010 ADAPTOR, 15 8A-NS3-014-010 CABI,TOP 6 8A-NS3-010-010 PROTECTOR,SQA 16 8A-NS3-015-010 PANEL,DUCT S 7 8A-NS3-011-010 PROTECTOR,TWA 17 8A-NS3-017-010...
  • Page 49 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 9820572 9630472 0251431 Printed in Singapore...

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