Table of Contents
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SERVICE MANUAL
COMPACT DISC/ STEREO
CASSETTE RECEIVER
SYSTEM
NSX-WK790
This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No.09-997-413-1T1).
If requiring information about CD mechanism, see Service Manual of 4ZG-1
(S/M Code No.09-985-249-8S2).
NSX-WK790
• BASIC TAPE MECHANISM : 2ZM-1 MK2 PR4N
• BASIC CD MECHANISM : 4ZG-1 VOS1RDSH
CD-
CASSEIVER
CX-NWK790
S/M Code No. 09-997-413-1R1
CENTER
SPEAKER
SPEAKER
SX-CR677
SX-NAV774
HRJ(ST)
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Summary of Contents for Aiwa NSX-WK790
- Page 1 NSX-WK790 HRJ(ST) SERVICE MANUAL COMPACT DISC/ STEREO • BASIC TAPE MECHANISM : 2ZM-1 MK2 PR4N CASSETTE RECEIVER • BASIC CD MECHANISM : 4ZG-1 VOS1RDSH CENTER SYSTEM SPEAKER CASSEIVER SPEAKER NSX-WK790 CX-NWK790 SX-CR677 SX-NAV774 This Service Manual is the “Revision Publishing” and replaces “Simple Manual”...
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Page 2: Table Of Contents
TABLE OF CONTENTS SPECIFICATIONS ..........................3 ACCESSORIES/PACKAGE LIST ......................3 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING/ Precaution to replace Optical block ......................4 ELECTRICAL MAIN PARTS LIST ..................... 5-10 TRANSISTOR ILLUSTRATION ......................11 FL GRID ASSIGNMENT/ANODE CONNECTION ................12 BLOCK DIAGRAM-1 (MAIN) ...................... -
Page 3: Specifications
SPECIFICATIONS • Design and specifications are subject to change without notice. • Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. • The word “BBE” and the “BBE symbol” are trademarks of BBE Sound,Inc. -
Page 4: 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 the CAUTION instructions below when servicing. Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous WARNING! radiation exposure. -
Page 5: Electrical Main Parts List
ELECTRICAL MAIN PARTS LIST REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 87-A40-509-080 ZENER,MTZJ6.8C 87-A40-346-080 ZENER,MTZJ8.2C 87-020-454-010 IC,DN 6851 87-A40-442-080 ZENER,MTZJ9.1A 8Z-NH7-605-010 C-IC,LC876572V-5L45 87-020-331-080 CHIP-DIODE,DAN202K 87-A20-951-010 IC,TSOP1838RF1 87-017-149-080 ZENER,HZS6A2L 87-A20-783-040 C-IC,BA7762AFS 87-A21-023-040 C-IC,BA3835F 87-A40-618-080 VARI-CAP,SVC 348(S/T) 87-A21-022-040 C-IC,BA3880FS 87-A21-021-040... - Page 6 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C335 87-010-401-080 CAP, ELECT 1-50V C629 87-010-405-080 CAP, ELECT 10-50V C336 87-010-401-080 CAP, ELECT 1-50V C630 87-010-213-080 C-CAP,S 0.015-50 B C337 87-010-196-080 CHIP CAPACITOR,0.1-25 C631 87-010-992-080 C-CAP,S 0.047-25 B C339 87-010-196-080 CHIP CAPACITOR,0.1-25...
- Page 7 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C855 87-A10-801-080 C-CAP,S 0.022-16 J B CM C154 87-010-264-040 CAP,E 100-10 5L C856 87-A10-801-080 C-CAP,S 0.022-16 J B CM C181 87-012-157-080 C-CAP,S 330P-50 CH C857 87-016-081-080 C-CAP,S 0.1-16 RK C182 87-010-197-080 CAP, CHIP 0.01 DM...
- Page 8 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION LED414 87-A40-496-040 LED,SLR-342MCT31 GRN C203 87-010-546-080 CAP, ELECT 0.33-50V LED415 87-A40-496-040 LED,SLR-342MCT31 GRN C204 87-010-546-080 CAP, ELECT 0.33-50V LED416 87-A40-619-080 LED,SLR-56PT-TE7-W GRN C205 87-010-186-080 CAP,CHIP 4700P LED417 87-A40-619-080 LED,SLR-56PT-TE7-W GRN C206 87-010-186-080...
- Page 9 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION LED442 87-A40-637-040 LED,SLV-312MC GRN C717 87-012-286-080 CAP, U 0.01-25 LED443 87-A40-637-040 LED,SLV-312MC GRN C719 87-012-286-080 CAP, U 0.01-25 LED444 87-A40-637-040 LED,SLV-312MC GRN C720 87-012-195-080 C-CAP,U 100P-50CH LED445 87-A40-637-040 LED,SLV-312MC GRN C721 87-012-176-080...
- Page 10 REF. NO PART NO. KANRI DESCRIPTION C960 87-012-350-080 C-CAP,1-25 F CF801 87-008-261-010 FILTER, SFE10.7MA5-A CF802 87-008-261-010 FILTER, SFE10.7MA5-A CN701 87-A60-700-010 CONN,13P H GRY TUC-P13X-C1 FFE801 A8-8ZA-190-030 8ZA-1 FEUNM J801 87-A60-703-010 TERMINAL,ANT 3P CJ-9037 J940 81-754-629-010 CONNECTOR, 2P L771 87-A50-266-010 COIL,FM DET-2N(TOK) L772 87-A90-052-010 FLTR,CFMT-450A(TOK)
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Page 11: Transistor Illustration
FL (BJ687GK) GRID ASSIGNMENT/ANODE CONNECTION 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... -
Page 12: Block Diagram-1 (Main)
BLOCK DIAGRAM-1 (MAIN) MAIN C.B CN601 SIG/MS SIG/MS CN604 TM-BASE TM-BASE PLL-CE TM-BASE PLL-CE TM-BASE TUNE/IFC IC601 TUNE/IFC M62445AFP DATA STEREO STEREO DATA FUNCTION/V-F/ DATA TUNE/IFC DATA VOL/T-BASS TUNE/IFC STEREO J601 STEREO TU-L TU-L TUNER(L) AUX(L) TU-R TU-R TUNER(R) O-MUTE VIDEO/ PLL-CE TU-ON... -
Page 13: Block Diagram-2 (Front)
BLOCK DIAGRAM-2 (FRONT) SW C.B... -
Page 14: Block Diagram-3 (Tuner)
BLOCK DIAGRAM-3 (TUNER) WIRING-1 (TUNER) -
Page 15: Schematic Diagram-1 (Tuner)
SCHEMATIC DIAGRAM-1 (TUNER) -
Page 16: Wiring-2 (Main)
WIRING-2 (MAIN) -
Page 17: Schematic Diagram-2 (Deck)
SCHEMATIC DIAGRAM-2 (DECK) -
Page 18: Schematic Diagram-3 (Dolby)
SCHEMATIC DIAGRAM-3 (DOLBY) -
Page 19: Schematic Diagram-4 (Main)
SCHEMATIC DIAGRAM-4 (MAIN) C735 1000p C619 3900p D5SBA20 2SB1342 2SB1342... -
Page 20: Wiring-3 (Front)
WIRING-3 (FRONT) -
Page 21: Schematic Diagram-5 (Front)
SCHEMATIC DIAGRAM-5 (FRONT) CSA1362GR CSA952K CSA952K... -
Page 22: Schematic Diagram-6 (Amp)
SCHEMATIC DIAGRAM-6 (AMP) CMBT5551 CMBT5551 2SD1933 CMBT5551 2SD2494 2SB1625 2SD2494 2SB1625... -
Page 23: Wiring-4 (Amp)
WIRING-4 (AMP) -
Page 24: Wiring-5 (Key Control)
WIRING-5 (KEY CONTROL) -
Page 25: Schematic Diagram-7 (Key Control)
SCHEMATIC DIAGRAM-7 (KEY CONTROL) -
Page 26: Wiring-6 (Pt)
WIRING-6 (PT) -
Page 27: Schematic Diagram-8 (Pt)
SCHEMATIC DIAGRAM-8 (PT) -
Page 28: Electrical Adjustment
ELECTRICAL ADJUSTMENT TUNER C.B CN701 (LCH) (RCH) TC941 L981 (1/3) (3/3) (CLK) IC771 L941 L771 L942 L772 TC943 FFE801 (VT) < TUNER SECTION > 1. Clock Frequency Check 5. SW Tracking Adjustment Settings: • Test point: TP2 (CLK) Settings: • Test point: TP6 (Lch), TP7 (Rch) Method: Set to MW1602kHz and check that the test point is •... - Page 29 MAIN C.B SFR352 SFR351 IC301 TP9 (RCH) IC601 TP8 (LCH) (GND) DECK–1 P, DECK-2 R/P/E HEAD DECK C.B SFR1...
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Page 30: Practical Service Figure
< DECK SECTION > 10. Tape Speed Adjustment (DECK1, DECK2) 14. REC/PB Frequency Response Adjustment Settings: • Test tape: TTA-602 Settings: • Test tape: TTA-100 • Test point: TP8 (Lch), TP9 (Rch) • Test point: TP8 (Lch), TP9 (Rch) • Input signal: 1kHz/10kHz (LINE IN) •... -
Page 31: Ic Description
IC DESCRIPTION IC, LC876572V-5L45 Description Pin No. Pin Name CLOCK output for MAIN,FRONT PWB. DATA DATA output for MAIN, FRONT PWB. STB (M) Data latch strobe output for MAIN PWB. O-LED LED ON/ OFF output. STB (SHIFT) Latch strobe output for FRONT shift register. RYM-CS Latch strobe output for RHYTHM IC. - Page 32 Pin Name Description Pin No. P26 / FM1 FL segment P26 output / FM1 (OIRT) input to diode (Not connected). P25 / RDS FL segment P25 output / RDS input to diode (Not connected). P24 / R+1 FL segment P24 output / RVS+1 way input to diode (Not connected). P23 / DSP FL segment P23 output / DSP input to diode (Not connected).
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Page 33: Ic Block Diagram
IC BLOCK DIAGRAM IC, BA7762AFS IC, BA3835F IC, BU2099FV... - Page 34 IC, M62445AFP IC, LA1837NL IC, M62491FP MCU I/F...
- Page 35 IC, M65847AFP IC, M62463AFP DVDD IC, BA3880FS IC, LC72131D IC, BU9990-03FS (1MBIT) SERIUAL TEST CTRL CIRCUIT INTERFACE ADPMC...
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Page 36: Mechanical Exploded View 1/1
MECHANICAL EXPLODED VIEW 1/1 P.C.B P.C.B P.C.B P.C.B HT-SINK 4ZG-1 P.C.B P.C.B PLATE SHILD 96-60 3T P.C.B PLATE,SHILD PLATE,PT 2ZM-3MK2 CHAS,MAIN... -
Page 37: Mechanical Parts List 1/1
48 87-050-079-010 AC-CORD ASSY,E 9 81-532-080-010 LABEL, CASS. COMPT 49 8Z-NFU-012-010 PLATE,PRO 10 85-NF5-617-010 CABLE,FFC 6P-1.25 50 84-ZG1-245-210 CAP,OPTICAL 11 82-NE6-067-010 BADGE,AIWA 30N 51 87-NF6-616-010 CONN ASSY,8P RPB 12 8Z-NF7-011-010 KNOB,RTRY VOL 52 87-NF6-205-010 GUIDE,LED 13 8Z-NF7-014-010 RING,VOL 53 8Z-NF7-202-010 GUIDE,PLAY... -
Page 38: Tape Mechanism Parts List 1/1
TAPE MECHANISM PARTS LIST 1/1 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 1 82-ZM3-301-519 CHAS ASSY,M2 36 82-ZM1-236-019 CAPSTAN N 2-41.5 2 82-ZM1-258-110 SPR-T,PINCH L 37 82-ZM1-239-019 CAPSTAN N 2.2-41.7 3 82-ZM1-341-110 LVR ASSY,PINCH L2 38 82-ZM1-322-019 SPR-T,FR60 4 82-ZM1-333-010... -
Page 39: Tape Mechanism Exploded View 1/1
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) -
Page 40: Spring Application Position
SPRING APPLICATION POSITION SPEAKER DISASSEMBLY INSTRUCTIONS Type.1 Type.4 82-ZM1-257-019 82-ZM1-218-019 Insert a flat-bladed screwdriver into the position indicated by the TOOLS arrows and remove the panel. Remove the screws of each speaker SPR-T,CAS SPR-E,HB 1 Plastic head hammer unit andthen remove the speaker units. 2 (-) flat head screwdriver 3 Cut chisel 82-ZM1-285-310... -
Page 41: Speaker Parts List 1/1
SPEAKER PARTS LIST 1/1 (SX-NAV774) REF. NO PART NO. KANRI DESCRIPTION 1 83-096-614-010 SPEAKER CORD ASSY (YB)(N858) 2 83-MS2-603-310 SPKR,T 60 3 87-NSG-602-110 SPKR,W 160 4 88-NSV-601-010 TERMINAL,ASSY 5 8Z-NSU-001-010 PANEL,FR L 6 8Z-NSU-002-010 PANEL,FR R 7 8Z-NSU-003-010 PANEL,TW 8 8Z-NSU-005-010 PANEL,DUCT L 9 8Z-NSU-006-010 PANEL,DUCT R... - Page 42 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 Printed in Singapore 920074...