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Sanyo DC-DA90 Service Manual

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Service Manual
Contents
Specifications ................................................................... 1
System connections ......................................................... 1
What to do if ..................................................................... 1
Laser beam safety precaution .......................................... 2
CD pick-up maintenance .................................................. 2
CD player adjustments ..................................................... 2
Tape adjustments ............................................................ 3
Tuner adjustments ........................................................... 4
(Cabinet & Chassis) ...................................................... 5
(Cabinet & Chassis) ...................................................... 6
(Tape mechanism) ........................................................ 9
(CD mechanism) ........................................................... 9
SP: This service manual consists of "DC-DA90U/SP" (Main unit : 129 619 02) and
"SX-DA90/SP" (Speaker system : 165 045 00).
Micro Component System
IC block diagram & description ........................................ 10
LCD display description ................................................... 14
Wiring connection ............................................................ 15
(FRONT) ....................................................................... 16
(CD) ............................................................................... 18
(TUNER) ....................................................................... 22
(AMPLIFIER ) ................................................................ 26
(FRONT & CD) .............................................................. 20
(TUNER) ....................................................................... 24
(AMPLIFIER) ................................................................. 28
(POWER TRANSFORMER & LED) .............................. 30
FILE NO.
DC-DA90
(SP)
PRODUCT CODE No.
129 620 02
SM
REFERENCE No.
5810260

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  Summary of Contents for Sanyo DC-DA90

  • Page 1: Table Of Contents

    FILE NO. Service Manual Micro Component System DC-DA90 (SP) Contents PRODUCT CODE No. 129 620 02 Specifications ..............1 IC block diagram & description ........10 System connections ............1 LCD display description ........... 14 What to do if ..............1 Wiring connection ............
  • Page 2: Specifications

    SPECIFICATIONS Tuner General Output power ......4 W x 2 Reception frequency ....FM : 87.5 - 108.0 MHz AM : 522 - 1611kHz (at 4 ohms, 10% distortion) Outputs ........SPEAKERS : 4 ohms CD player PHONES : 8 - 32 ohms Channels ........
  • Page 3: Laser Beam Safety Precaution

    Clean a lens with swab of the cotton which moistened it with alcohol, cleaning paper or cleaning disc appointed. Specified cleaning disc : LC-1 (Part code : 645 026 1961 ..manufactured by SANYO.) Show a clean procedure in the following in reference by swab of cotton.
  • Page 4: Tape Adjustments

    CD PLAYER ADJUSTMENTS (2) Checking the "eye" pattern Switch "ON" the POWER. Connect an oscilloscope to TP1 (RF) and TP4 (VC). (RF) OSCILLOSCOPE Load the test disc. Press the PLAY button. (VC) Check to be sure that the "eye" pattern is at the center of waveform and that the diamond shape is clearly defined.
  • Page 5: Tuner Adjustments

    TUNER ADJUSTMENTS • Use a plastic screw driver for adjustments. • MODE : ST (Stereo) • Speaker impedance : 4 ohm • TUNING CT211 TP11 L2204 R2901 FM : 87.5 - 108MHz AM: 522 - 1611kHz 1AD4B10D0972D T002 94V-0 TP15 T2002 TP25 R2900...
  • Page 6: Exploded View (Cabinet & Chassis)

    EXPLODED VIEW (CABINET & CHASSIS) - 5 -...
  • Page 7: Parts List (Cabinet & Chassis)

    PARTS LIST PRODUCT SAFETY NOTICE EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC SYMBOL IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY CAN ! ! ! BE OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY , USE ONLY THE REPLACEMENT ! ! ! PARTS DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE...
  • Page 8 LED P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION CN603 645 012 5485 SOCKET,FPC 15P,FRONT-TU REF.NO. PART NO. DESCRIPTION D6901 407 012 4406 DIODE 1SS133 614 321 3185 ASSY,PWB,LED (Only initial) D6902 407 012 4406 DIODE 1SS133 D6951 408 037 0503 LED SLP-3118C-51HAB-T1,LED IC601 409 504 4802 IC LC72336-9A38,MICON D6952...
  • Page 9 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION Q2003 405 017 9709 TR 2SC3330-U L4902 645 031 5893 TRANS,OSC,85KHZ,O.S.C 405 017 9600 TR 2SC3330-T LG401 645 006 4432 FIXER 405 011 8609 TR 2SC1740S-S PR495 645 014 2529 PROTECTOR,1.25A 125V 405 011 8500 TR 2SC1740S-R PR496 645 014 2536 PROTECTOR,1.5A 125V...
  • Page 10: Tape Mechanism

    EXPLODED VIEW & PARTS LIST(TAPE MECHANISM) TAPE MECHANISM REF.NO. PART NO. DESCRIPTION TM01 614 309 7976 ASSY,MECHA,TM-DA70TN-SH TM02 TM01 645 033 8625 E HEAD 6PA TM02 645 041 3025 R.P HEAD TM03 645 009 1612 PINCH ROLLER ARM ASSY TM03 TM04 645 009 1766 RF BELT TM05...
  • Page 11: Ic Block Diagram & Description

    IC BLOCK DIAGRAM & DESCRIPTION IC103 MM1469XH (CD Driver) IC201 LA1186N-AUDIO (FM Front End) D.BUF D.BUF D.BUF D.BUF DRIVER MUTE T.S.D IC412 TA8229K (Power Amplifier) D.BUF D.BUF D.BUF D.BUF IC410 BA3314F (Dula Preamplifier with ALC Detector) IC101 LA9241ML (Servo Signal Processor) IC411 LC75932 (Function &...
  • Page 12 IC101 LA9241ML (Servo Signal Processor) No. Pin Name I/O Function No. Pin Name I/O Function FIN2 I Connection Pin for Photo Diode of Pickup. I Input Pin for Tracking Jump Signal from Digital FIN1 I FIN2 + FIN1 = RF, FIN2 - FIN1 = FE I Signal Processor.
  • Page 13 IC BLOCK DIAGRAM & DESCRIPTION IC102 LC78622NE (Digital Signal Processor) No. Pin Name I/O Function No. Pin Name I/O Function DEFI I Input terminal for detect signal of defect TEST3 I Test pin. I Input terminal for test. TEST4 I Test pin. O The phase comparison output terminal for - Non connection.
  • Page 14 IC BLOCK DIAGRAM & DESCRIPTION IC601 LC72336-9A38 ( Micro Processor) MICOM NAME PIN NO. NAME FUNCTION Connection terminal of crystal oscillation (4.5MHz) TEST2 GND. PG3(S10) CD IDATA CD MECA Communcation Line PG2(SO0) CD ODATA DSP,ASP Control PG1(SCLK0) CD CLOCK RWC Output CD RESET CD DSP RESET Output Non Connection...
  • Page 15: Lcd Display Description

    LCD DISPLAY DESCRIPTION LCD60 PAD NO. IC NO. COM1 COM2 COM3 COM1 COM2 COM3 ROCK JAZZ PROG. BASS SURR MONO CLASSIC - 14 -...
  • Page 16: Wiring Connection

    WIRING CONNECTION TUNER P.W.B CN201 L-CH R-CH SPEAKER SPEAKER CN202 AM LOOP (15P) ANT. CN203 (1P) ANT. AMP P.W.B BOARD TO BOARD CN491 CN402 (12P) (2P) CN401 LED P.W.B (2P) CN421 CN490 PHONES (8P) CN603 (15P) LCD60 CN406 CN602 (4P) (2P) JW601 CN601...
  • Page 17: Schematic Diagram (Front)

    SCHEMATIC DIAGRAM (FRONT) R6009 EU-1 EU-2 8.2K 8.2K 8.2K OPEN 8.2K TU_+B TU_+B TU_GND TU_GND TO TUNER SEC. TO FMOSC TU_L TU_L TU_R TU_R CD RESET CD_RST MONO SQOUT TO CD SEC. BAND1 COIN TU_MUTE CQCK R6109 BAND2 STEREO TU_R TU_R D6901 R6201...
  • Page 18 SCHEMATIC DIAGRAM (CD) REST CD MECHA R1462 CQCK R1463 PICK UP COIN SF-P101N R1475 R1499 SQOUT R1453 R1465 2.7K C1335 4.50 10;25 5.00 Q1301 C1491 KTA1270 0.01 IC101 LA9241M DEFI EFLG FIN2 C1302 1000P SBSY S.DVCC R1337 C1451 R1454 RFVCC 6.8K C1773 R1771...
  • Page 19 WIRING DIAGRAM ( FRONT & CD ) CN603 TU-R TU-GND JW601 SQOUT COIN TU+B C6912 TUGND C1773 J6400 REST TULCH R1476 J1804 J6401 J1602 J6402 J1612 J1610 J1603 J6303 J1411 J6403 J1604 Q1401 C6908 Q6201 D1402 J6404 C6501 J1605 R1462 R6501 J6405 R6111...
  • Page 20 SCHEMATIC DIAGRAM (TUNER) R2900 1,1/8Z T2001 IC201 LA1186N XF215 R2007 0.95 1.63 4.66 4.66 3.98 4.66 560K XF212 FM 75 OHM 450KHz 4.74 TP201 4.90 L2011 3.5D C2012 R2008 Q2101 C2400 C2403 XF211 KRA107M 4.70 CN203 4.87 C2401 C2005 Q2001 0.01 KTC3195-O T2002...
  • Page 21: Wiring Diagram

    WIRING DIAGRAM (TUNER) R2901 1AD4B10D0972D T002 94V-0 R2900 D2102 L2103 MW ANT L2204 CN202 R2117 J2800 R2201 C2218 C2141 BAND2 J2801 J2802 R2206 C2025 C2027 J2803 L2005 C2029 BAND1 T2002 J2103 R2119 T2001 J2104 J2804 L2007 C2131 J2105 R2105 J2805 C2103 D2004 J2812...
  • Page 22 SCHEMATIC DIAGRAM (AMPLIFIER) R4000 R4001 R4002 R4003 R4004 1,1/8Z 1,1/8Z 1,1/8Z 1,1/8Z 1,1/8Z S4950-3 R4730 KTA1267 Q4730 C4814 R4750 R4732 R4757 0.15 R4770 KRC102M R4731 R4749 Q4740 120K S4950-4 R4805 Q4751 R4748 S4950-8 2SD1012 C4912 1000P 1000P 220/25 C4705 R4756 C4805 4.7K C4701...
  • Page 23: (Tuner)

    WIRING DIAGRAM (AMPLIFIER) Q4902 R4914 CN441 T2.5A L250V Q4904 D4982 C4906 LG401 C4982 D4980 D4983 C4916 C4983 C4981 D4981 FU401 J4419 C4980 C4918 J4410 J4503 C4811 S4950 J4408 R4810 R4804 R4941 C4803 R4803 C4806 R4710 R4805 R4852 C4802 C4805 J4505 C4951 C4706 J4404...
  • Page 24: (Power Transformer & Led)

    NIP CUT CN451 NIP CUT CN452 L4591 LED P.W.BOARD 1AD4B10D0970F TOO2 94V-0 D6952 D6951 D6953 D6954 D6955 R6951 +B GND SANYO Electric Co., Ltd. This is a basic wiring diagram. Osaka, Japan Feb. / '02 Printed in Japan - 30 -...