Aiwa NSX-R20 Service Manual

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Page 1 NSX-R20 K(S) NSX-R21 EZ(S) SERVICE MANUAL BASIC CD MECHANISM : BZG-2 ZD9GNC1 CD STEREO SYSTEM BASIC TAPE MECHANISM : CMAT6Z2(1+1)ALPS REMOTE SYSTEM SPEAKER CASSEIVER CONTROLLER NSX-R20 CX-NR20 SX-NR20 RC-CAS03(VS) NSX-R21 CX-NR21 If requiring information about the CD mechanism, see Service Manual of BZG-2, (S/M Code No.
Page 2: Table Of Contents
TABLE OF CONTENTS SPECIFICATIONS ................................3 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING ..............4 NOTE ON BEFORE STARTING REPAIR ........................5, 6 ACCESSORIES PARTS LIST -1/1 ............................7 ELECTRICAL PARTS LIST ............................8 ~ 21 TRANSISTOR ILLUSTRATION ............................22 SCHEMATIC DIAGRAM -1/4 (MAIN-1/2, DECK/AMP/HP SECTION) ................
Page 3: Specifications
SPECIFICATIONS MAIN UNIT (CX-NR20/CX-NR21) TUNER CD PLAYER FM tuning range 87.5 MHz to 108 MHz Laser Semiconductor laser ( = 780 nm) FM usable sensitivity (IHF) 16.8 dBf D/A converter 1 bit dual FM antenna terminal 75 ohms (unbalanced) Signal-to-noise ratio 85 dB (1 kHz, 0 dB) MW tuning range 531 kHz to 1602 kHz (9 kHz step)
Page 4: 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 proce- dures other than those specified herin may result in WARNING!! hazardous radiation exposure.
Page 5: Note On Before Starting Repair
NOTE ON BEFORE STARTING REPAIR -1/2 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 6 NOTE ON BEFORE STARTING REPAIR -2/2 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 7: Accessories Parts List -1/1
ACCESSORIES PARTS LIST -1/1 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 8 ELECTRICAL PARTS LIST - 1/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 9 ELECTRICAL PARTS LIST - 2/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 10 ELECTRICAL PARTS LIST - 3/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 11 ELECTRICAL PARTS LIST - 4/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 12 ELECTRICAL PARTS LIST - 5/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 13 ELECTRICAL PARTS LIST - 6/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 14 ELECTRICAL PARTS LIST - 7/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 15 ELECTRICAL PARTS LIST - 8/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 16 ELECTRICAL PARTS LIST - 9/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 17 ELECTRICAL PARTS LIST - 10/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 18 ELECTRICAL PARTS LIST - 11/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 19 ELECTRICAL PARTS LIST - 12/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 20 ELECTRICAL PARTS LIST - 13/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 21: Electrical Parts List ....................................................................................................................................... 8
ELECTRICAL PARTS LIST - 14/14 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 22: Transistor Illustration
• Regarding connectors, they are not stocked as they are not the initial order items. The connectors are available after they are supplied from connector manufacturers upon the order is received. CHIP RESISTOR PART CODE Chip Resistor Part Coding Figure Resistor Code Value of resistor Chip resistor...
Page 23: Schematic Diagram -1/4 (Main-1/2, Deck/Amp/Hp Section)
SCHEMATIC DIAGRAM - 1/4 (MAIN -1/2, DECK/AMP/HP SECTION) TO MAIN C.B (TUNER SECTION) 1A-16A MAIN C.B 1/2 (DECK/AMP SECTION) TU-SIG <EZ> RDS-CLK RDS-DATA 1/50 1/50 3.49VAC -26.0V 11.49V 4.8V 220/10 18.7V 47/25 -4.6V Q113,127 2SC3052Fx2 11.27V 1/50 0.1/50 2SD1306NE 2SC3052F -30.27V -19.47V 18.7V...
Page 24: Schematic Diagram -2/4 (Main-2/2, Tuner Section)
SCHEMATIC DIAGRAM - 2/4 (MAIN -2/2, TUNER SECTION) Q902 L901,902,904,905 Q901 MAIN C.B 2/2 (TUNER SECTION) SH901 SHLD CASE Q903-905 L801 L802 Q835 Q836 AM IF ADJ. FM IF AMP FM BAND SW 7.81V 7.8V 5.6V MS2GH-A ANTENNA 6.9V FM75 (COAXIAL) 11.27V 100/10...
Page 25: Wiring -1/4 (Main C.b, Hp C.b)
WIRING - 1/4 (MAIN C.B / HP C.B) TO DECK2 (CNA302) TO DECK1 (CNA301) MAIN C.B <EZ> <EZ> L941 R969 JR808 IC861 Q948 TC942 R871 C952 R870 Q951 L942 R952 L952 Q861 J832 C948 R958 C877 <EZ> C876 Q863 C799 Q952 <EZ>...
Page 26: Schematic Diagram -3/4 (Front/Deck Section)
SCHEMATIC DIAGRAM - 3/4 (FRONT, DECK SECTION) FRONT C.B 4.7/50 3.49VAC 4.7/50 -26.0V 47/35 <EZ> R701 TU-SIG R702 RDS-CLK R703 11.27V 5.7V 5.0V RDS-DATA S351 S350 <EZ> R351 R350 R349 4.7K 3.3K 2.7K 5.0V K:UPD780226GF-033-3BA EZ:UPD780228GF-089-3BA 3.49VAC 4.9V 11.49V 0.1/50 -26.0V 11.27V 2.99V...
Page 27: Wiring -2/4 (Front C.b)
WIRING - 2/4 (FRONT C.B) <EZ> R701 <EZ> R702 R703 <EZ> S350 S351 R350 R351 R349 S350 S351 <EZ> -27-...
Page 28: Wiring -3/4 (Deck C.b)
WIRING - 3/4 (DECK C.B) DECK C.B DECK 1 DECK 2 P HEAD E / RP HEAD CNA301 CNA302 TO MAIN C.B TO MAIN C.B CN301 CN302 -28-...
Page 29: Schematic Diagram -4/4 (Power Section)
SCHEMATIC DIAGRAM -4/4 (POWER SECTION) POWER C.B CNF-9 EZ 45.0VAC 32.0VAC 3.7VAC PT,SUB BMA E AC230V, 50Hz -29-...
Page 30: Wiring -4/4 (Power C.b)
WIRING - 4/4 (POWER C.B) POWER C.B AC230V, 50Hz -30-...
Page 31: Electrical Adjustment
ELECTRICAL ADJUSTMENT -1/7 MAIN C.B PARTS SIDE TC942 L941 L942 L953 L952 L901 L907 SFR451 SFR452 L905 L904 L902 MAIN C.B PATTERN SIDE IC801 DECK C.B MOTOR -31-...
Page 32 ELECTRICAL ADJUSTMENT -2/7 <TUNER Adjustment> 1. VT Check (MW) Requirements • Measuring instrument: Digital multimeter Test points: VT, GND 1) Connect the digital multimeter between VT and GND. 2) Set the function to MW, and tune the receiving frequency of the unit at 1,602 kHz. 3) Check that the digital multimeter ranges under 9 V.
Page 33 ELECTRICAL ADJUSTMENT -3/7 <MW/LW Adjustment> Make the following preparations for MW/LW adjustment. Preparations ´ • Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6y) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Position the loop antenna connected to S.S.G.
Page 34 ELECTRICAL ADJUSTMENT -4/7 <FM Adjustment> Make the following preparations for FM adjustment. Preparations ´ • Standard Signal Generator (S.S.G.) / Loop antenna / Oscilloscope / Millivoltmeter / Dummy resistance (6y) 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Connect the output of S.S.G.
Page 35 ELECTRICAL ADJUSTMENT -5/7 <DECK Section> 12. Tape Speed Adjustment (DECK 2) Requirements • Measuring instrument: Wow and flutter meter (frequency counter) Test tape: TTA-100 (3 kHz) Test point: HP OUT Adjustment point: DECK MOTOR SFR 1) Connect the wow and flutter meter to HP OUT of the unit. 2) Insert the test tape (TTA-100) to DECK 2.
Page 36 ELECTRICAL ADJUSTMENT -6/7 17. Playback Sensitivity Check (DECK 1 and DECK 2) Requirements • Measuring instrument: Millivoltmeter Test tape: TTA-200 (400 kHz) Test points: TP8 (Lch), TP9 (Rch) 1) Connect CH1 of the millivoltmeter to TP8 (Lch) and CH2 to TP9 (Rch). 2) Insert the test tape (TTA-200) to DECK 1 and play back.
Page 37 ELECTRICAL ADJUSTMENT -7/7 <FRONT Section> FRONT C.B PATTERN SIDE CLOCK FRONT C.B PARTS SIDE L951 20. Clock Adjustment Requirements • Measuring instrument: Frequency counter Test point: CLOCK, GND Adjustment point: L951 1) While pressing the UP and POWER button, insert the AC plug to the outlet. 2) Adjust L951 so that the frequency counter indicates the frequency level within 72.743 0.073 Hz.
Page 38 CD TEST MODE-1/1 1. How to Start the CD Test Mode While pressing the CD OPEN/CLOSE button, insert the AC plug to the power outlet. When the test mode is started, the message [TEST] is displayed. 2. How to Exit the CD Test Mode Press the POWER button, push other FUNCTION button or disconnect the AC plug.
Page 39: Lcd Display-1/1
LCD DISPLAY-1/1 GRID ASSIGNMENT ANODE CONNECTION PIN CONNECTION -39-...
Page 40: Ic Block Diagram
IC BLOCK DIAGRAM -1/3 IC, BD3881FV IC, NJM7806FA -40-...
Page 41 IC BLOCK DIAGRAM -1/3 IC, LA1845N-A IC, LC7213D-N -41-...
Page 42 IC BLOCK DIAGRAM -3/3 IC, BU1920FS -42-...
Page 43: Ic Description
IC DESCRIPTION -1/1( PD780226GF-033-3BA/ PD780228GF-089-3BA)-1/2 Pin Name Pin No. Description O-MOTOR DECK motor output. O-SOL1 DECK1 solenoid output. O-SOL2 DECK2 solenoid output. O-STBY LED Standby LED output. O-MUTE System mute ON/OFF output. O-KSCAN Key scan timing output. O-PLL_CE PLL chip enable output for LC72131D-N. I-TM_BASE Time-base signal input.
Page 44 IC DESCRIPTION -1/1( PD780226GF-033-3BA/ PD780228GF-089-3BA)-2/2 Pin No. Pin Name Description I-SPEANA_1 A/D input for spectrum analyser level display. I-SPEANA_2 A/D input for spectrum analyser level display. I-SPEANA_3 A/D input for spectrum analyser level display. I-KEY 1 Key A/D input 1. I-KEY 2 Key A/D input 2.
Page 45: Mechanical Exploded View -1/1
MECHANICAL EXPLODED VIEW -1/1 CX-SNR21 -45-...
Page 46: Mechanical Parts List -1/1
O MC1030 88-911-101-110 FF-CABLE,11P 1.25 100MM O MC1031 8A-NFA-208-010 GUIDE,FL 100-25 ANFA X MC1032 8C-NF9-621-010 PWB,FRONT CNF-9 O MC1033 87-B00-002-010 BADGE,AIWA 30 ABS SIL O MC1034 8C-NF8-008-010 PANEL,TRAY X MC1035 M8-BZG-29J-070 BZG-2 ZD9GNC1 O MC1036 8A-NF8-206-010 HLDR,PWB M O MC1037...
Page 47: Color Name Table
COLOR NAME TABLE Basic color symbol Color Basic color symbol Color Basic color symbol Color Black Cream Orange Green Gray Blue Transparent Blue Gold Pink Silver Titan Silver Brown Violet White Transparent White Yellow Transparent Yellow Metallic Blue Light Blue Transparent Green Dark Blue Transparent Orange...
Page 48 TAPE MECHANISM EXPLODED VIEW -1/1 <CMAT6Z2(1+1)ALPS> -48-...
Page 49: Tape Mechanism Parts List -1/1
TAPE MECHANISM PARTS LIST -1/1 <CMAT6Z2(1+1)ALPS> = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.

Page 50: General Speaker Disassembly Instructions (For Reference) -1/1
GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE) -1/1 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 Plastic head hammer unit and then remove the speaker units. ) flat head screwdriver Cut chisel How to Remove the PANEL, FR...
Page 51: Speaker Parts List -1/1 (Sx-Nr20)
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers. UNIT-NAME ! C REF-NO PARTS-NO PARTS-NAME SUFFIX&MODEL SX-SNR20 O SP1001 88-NSK-610-010 SPKR, CERAMIC ASSY O SP1002 8A-NSJ-006-010 BADGE,AIWA S35 O SP1003 8C-NS9-001-010 PANEL,FR L O SP1004 8C-NS9-002-010 PANEL,FR R X SP1005 8C-NS9-003-010 GRILLE,FRAME O SP1006 8C-NS9-011-010 PANEL,DUCT...
Page 52: Other Parts List -1/1
OTHER PARTS LIST -1/1 = ! SAFTY PARTS = Components marked All components used on this model at the production line are shown in this service manual. However, please note that not all components will be available as spare parts for after-sales service. Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Page 53 2-11, IKENOHATA 1-CHOME, TAITO-KU, TOKYO 110-8710, JAPAN TEL:03 (3827) 3111 0251431...

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Aiwa NSX-R20 Service Manual

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