Aiwa LCX-157 Service Manual
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Aiwa LCX-157 Service Manual

Aiwa LCX-157 Service Manual

Compact disc stereo system
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SERVICE MANUAL
COMPACT DISC STEREO
SYSTEM
This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No. 09-003-340-1T1).
LCX-157
BASIC TAPE MECHANISM : TN-21ZSC-2003
BASIC CD MECHANISM : DA11T3C
S/M Code No. 09-003-340-1R1
EZ(S)

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Summary of Contents for Aiwa LCX-157

  • Page 1 LCX-157 EZ(S) SERVICE MANUAL COMPACT DISC STEREO BASIC TAPE MECHANISM : TN-21ZSC-2003 SYSTEM BASIC CD MECHANISM : DA11T3C This Service Manual is the "Revision Publishing" and replaces "Simple Manual" (S/M Code No. 09-003-340-1T1). S/M Code No. 09-003-340-1R1...

  • Page 2: Specifications

    SPECIFICATIONS • Design and specifications are subject to change without notice.

  • 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 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 4: Electrical Main Parts List

    ELECTRICAL MAIN PARTS LIST REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C115 87-010-112-080 CAP, ELECT 100-16V C116 87-010-101-080 CAP, ELECT 220-16 87-A20-734-010 IC,TDA2007A C118 87-010-263-080 CAP, ELECT 100-10V 87-A21-443-040 C-IC,M62495AFP C119 87-010-190-080 S CHIP F 0.01 8A-CLB-602-010 IC,LC867240A-5P15 C120...
  • Page 5 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION C712 87-010-196-080 CHIP CAPACITOR,0.1-25 C910 87-012-286-080 CAP, U 0.01-25 C713 87-012-286-080 CAP, U 0.01-25 C940 87-012-286-080 CAP, U 0.01-25 C714 87-012-286-080 CAP, U 0.01-25 C942 87-012-172-080 CAPACITOR CHIP U 10P CH C715 87-012-195-080 C-CAP,U 100P-50CH...
  • Page 6 REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION S216 87-A90-095-080 SW,TACT EVQ11G04M C568 87-010-197-080 CAP, CHIP 0.01 DM S217 87-A90-095-080 SW,TACT EVQ11G04M C571 87-010-248-080 CAP, ELECT 220-10V S218 87-A90-095-080 SW,TACT EVQ11G04M C572 87-010-196-080 CHIP CAPACITOR,0.1-25 S220 87-A90-095-080 SW,TACT EVQ11G04M C573...

  • Page 7: Transistor Illustration

    FL (13-ST-36GNAK) GRID ASSIGNMENT/ANODE CONNECTION GRID ASSIGNMENT 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...
  • Page 8 WIRING-1 (MAIN) MAIN C.B MAIN C.B (INSERTED PARTS) (CHIP PARTS) DC JACK J103 PHONES J102 SPEAKERS J101 J801 ANTENNA MW/LW LOOP (DECK MOTOR) (MOTOR SW) 75Ω (PLAY SW) (COXIAL) NOTE AC C.B AC C.B (INSERTED PARTS) (CHIP PARTS) PT101 POWER TRANSFORMER E C B E C B...

  • Page 9: Ic Block Diagram

    IC BLOCK DIAGRAM IC, M62495AFP IC, LA6541D IC, LA1837NL IC, LC72131D...
  • Page 10 SCHEMATIC DIAGRAM-1 (MAIN 1/2) TO MAIN C.B 2/2 MAIN C.B (1/2) J101 JACK. PIN 3P MSP J105 INV. SPEAKERS IC102 FUNCTION SWITCH HOLD DET HOLD DET POWER AMP J101 JACK. 3.5 ST PHONES IC301 CASSETTE F101 PER AMP 3.15A 250V AC C.B (1/2) 230V...
  • Page 11 SCHEMATIC DIAGRAM-2 (MAIN 2/2) MAIN C.B (2/2) DC BALANCE 2.2µH AM IF ADJ BAND TUNER ON//OFF SWITCH FM IF J801 ANTENNA FM 75Ω MW/LW LOOP BEAT AM RF AMP MW/LW SW IC771 FM/AM IF/STEREO L773 TUNER SYSTEM D944 D942 LW OSC SW LW ANT SW SIGNAL : PB/FM...
  • Page 12 WIRING-2 (CD/FRONT: INSERTED PARTS) FRONT C.B (INSERTED PARTS) LCD201 (DISPLAY) CD C.B (INSERTED PARTS) REMOTE SENSOR POWER S101 (DOOR SW) TIMER/ PLAY/CLEAR SLEEP /PAUSE ROCK TUNER/BAND JAZZ STOP/START LED C.B (INSERTED PARTS) NOTE Cxxx Rxxx E C B...
  • Page 13 WIRING-3 (CD/FRONT: CHIP PARTS) FRONT C.B (CHIP PARTS) CD C.B (CHIP PARTS) LED C.B (CHIP PARTS) MOTOR C.B (SLED MOTOR) CN510 (INSIDE LIMIT SW) OPTICAL PICK UP (SPINDLE MOTOR) SF-P101NR...
  • Page 14 SCHEMATIC DIAGRAM-3 (FRONT)
  • Page 15 SCHEMATIC DIAGRAM-4 (CD)

  • Page 16: Voltage Chart

    VOLTAGE CHART...

  • Page 18: Electrical Adjustment

    ELECTRICAL ADJUSTMENT...

  • Page 19: Practical Service Figure

    PRACTICAL SERVICE FIGURE < TUNER SECTION > < LW SECTION > < FM SECTION > Sensitivity: 58±5dB (at 144kHz) IHF Sensitivity: 15dB±5dB (at 90MHz) 55±5dB (at 198kHz) (THD 3%) 14dB±5dB (at 98.0/108.0MHz) 52±5dB (at 290kHz) Signal to noise ratio: More than 55dB Signal to noise ratio: More than 25dB (at 198kHz) (Input 54dB)
  • Page 20 IC DESCRIPTION IC, LC867240A-5P15 Pin No. Pin Name Description O-SCONTM M62439SP control. open drain output. O-SCONTL O-DATA Tuner control. CMOS output. ___________ I-TUNE/IFC Tuner control. O-TUCL Tuner control. CMOS output. O-COIN CD control. open drain output. I-SQOUT CD control. ___________ O-CQCK CD control.
  • Page 21 Pin No. Pin Name Description __________ I-STOP Tape stop input. 83-86 COM0-COM3 LCD common output. I-INIT Initial setting input. ______ I-AC/DC Beat selector output. “H” during selection. CMOS output . VSS3 — GND. VDD3 — O-NC Not used. O-TUCE Tuner chip enable output. CMOS output . O-CD-ON “H”...
  • Page 22 IC, LA9241ML Pin No. Pin Name Description Pin to which external pickup photo diode is connected. RF signal is created by adding FIN2 with the FIN1 pin signal. FE signal is created by subtracting from the FIN1 pin signal. FIN1 Pin to which external pickup photo diode is connected.
  • Page 23 Pin No. Pin Name Description Pin from which TES signal is output to DSP. “High Frequency Level” is used to judge whether the main beam position is on top of bit or on top of mirror. SLOF Sled servo off control input pin. 39, 40 CV–, CV+ CLV error signal input pin from DSP.
  • Page 24 IC, LC78622E Pin No. Pin Name Description DEFI Defect sense signal (DEF) input pin. (Connect to 0V when not used). Test signal input pin with built-in pull-down resistor. Be sure to connect to 0V. Phase comparator output pin to control external VCO. VVSS —...
  • Page 25 Pin No. Pin Name Description XVDD — Crystal oscillator power supply pin. XOUT Pin to which external 16.9344 MHz crystal oscillator is connected. XVSS — Crystal oscillator GND pin. Be sure to connect to 0V. SBSY Subcode block sync signal output pin. EFLG C1, C2, single and dual correction monitoring pin.

  • Page 26: Mechanical Parts List

    AC CORD ASSY,E BLK SUN FAI 4 8Z-CL8-209-010 SPR-T,CASS 29 8A-CLA-626-010 PT,EZ ACL-A 5 8A-CLB-017-010 WINDOW,DISP RDS 30 8Z-CDB-169-010 PANEL,CD SANYO 6 87-B00-002-010 BADGE,AIWA 30 ABS SIL 31 8Z-CL8-206-010 SPR-P,REC 7 8Z-CL8-204-010 CUSH,FOOT 32 8Z-CL8-214-010 DMPR,HLDR BE 8 8A-CLB-021-010 CABI,FR EZ 33 84-CD5-215-010...

  • Page 27: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW 1/1 P.C.B HT-SINK P.C.B TN-21ZSC CHAS, MAIN P.C.B...

  • Page 28: Tape Mechanism Exploded View

    TAPE MECHANISM EXPLODED VIEW 1/1 TAPE MECHANISM PARTS LIST 1/1 LUG PLATE REF. NO PART NO. KANRI DESCRIPTION REF. NO PART NO. KANRI DESCRIPTION 1 S1-921-030-4A0 HEAD BASE 36 S1-921-140-220V REC BUTTON LEVER 2 S1-821-030-070 AZIMUTH SPRING 37 S1-921-140-170 P.S.LEVER SPRING 3 S1-921-030-090 PANEL P SPRING 38 S1-921-073-040...

  • Page 29: Cd Mechanism Exploded View

    CD MECHANISM EXPLODED VIEW 1/1 SHAFT,SLIDE SF-P101NR CHASSIS SPINDLE MOTOR C,B MOTOR(M3) CD MECHANISM PARTS LIST 1/1 REF. NO PART NO. KANRI DESCRIPTION 1 S2-121-A28-400 COVER GEAR 2 S2-511-A21-000 GEAR MIDDLE 3 S2-511-A21-100 GEAR,DRIVE A S1-PN2-03R-OSE SCR PAN PCS 2-3 B 87-261-073-410 SCR S-TPG FLT 2.6-6 ALL M8-ZZK-E90-070...

  • Page 30: Speaker Parts List

    • The speakers that are supplied with the following models, are dedicated speakers for their respective models. Speakers of LCX-137 and those of LCX-157 have completely the same outside appearance but have no compatibility each other. Therefore, be careful not make mistake when using the speakers of the following models.

  • Page 31: Accessories/Package List

    ACCESSORIES/PACKAGE LIST REF. NO PART NO. KANRI DESCRIPTION 1 8A-CLB-906-010 IB,EZ(9L)B 2 87-A90-030-010 ANT,LOOP AM-NC C 3 87-A90-118-010 ANT,WIRE FM (Z) 4 87-A91-017-010 PLUG,CONVERSION JT-0476 5 8A-CLB-961-010 RC UNIT,RC-AAT11...
  • Page 32 2–11, IKENOHATA 1–CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111 737004 Printed in Singapore...

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