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Sanyo DC-DA370 Service Manual

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Service Manual
Contents
Specifications ................................................................... 1
System connection ........................................................... 1
Laser beam safety precaution .......................................... 2
CD pick-up maintenance .................................................. 2
CD player adjustments ..................................................... 2
Tape adjustments ............................................................ 3
Tuner adjustments ........................................................... 4
(Cabinet & Chassis) ...................................................... 6
(Tape mechanism) ........................................................ 13
(Cabinet & Chassis) ...................................................... 7
(Tape mechanism) ........................................................ 13
(CD mechanism) ........................................................... 7
IC block diagram & description ........................................ 14
This service manual consists of "DC-DA370U" (Main unit : 129 598 01) and "SX-DA370"
(Speaker system : 165 027 01).
Micro Component System
Schematic diagram
(CD) ............................................................................... 18
(FRONT) ....................................................................... 20
(AMPLIFIER ) ................................................................ 26
(TUNER) ....................................................................... 28
(CD & FRONT) .............................................................. 22
(TUNER & AMPLIFIER ) ............................................... 24
TRANSFORMER AND CD LID SWITCH) .................... 30
Voltage Table ................................................................... 31
LCD display description ................................................... 33
Wiring connection ............................................................ 34
FILE NO.
DC-DA370
(XE)
PRODUCT CODE No.
129 599 01 (XE)
SM
REFERENCE No.
5810189

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  Summary of Contents for Sanyo DC-DA370

  • Page 1: Table Of Contents

    FILE NO. Service Manual DC-DA370 Micro Component System (XE) PRODUCT CODE No. Contents 129 599 01 (XE) Specifications ..............1 Schematic diagram System connection ............1 (CD) ................18 Laser beam safety precaution .......... 2 (FRONT) ............... 20 CD pick-up maintenance ..........2 (AMPLIFIER ) ..............
  • Page 2: Specifications

    SPECIFICATIONS Tuner General Reception frequency ....FM : 87.5 - 108.0 MHz Output power ......12.5 W x 2 MW: 522 - 1611kHz (at 4 ohms, 10% distortion) LW : 144 - 288kHz Inputs ........VIDEO IN : 400 mV / 50k ohms Outputs ........
  • 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 (RF) 1. Switch "ON" the POWER. OSCILLOSCOPE 2. Connect an oscilloscope to TP1 (RF) and TP4 (VC). 3. Load the test disc. (VC) 4. Press the PLAY button. 5. 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 FM : 87.5 - 108MHz MW: 522 - 1611kHz LW : 144 - 288kHz Standatd Input: 60dB Antenna : 75 unbalanced , Modulation : 1 kHz Dev.
  • Page 6: When Assembling The Rack Gear And Cd Lid

    When assembling the Rack Gear and CD Lid When assembling the rack gear and CD lid, "A"part should be inserted into the "B" part. - 5 -...
  • Page 7: Exploded View (Cabinet & Chassis)

    EXPLODED VIEW (CABINET & CHASSIS) N.S.P : Not supplied as service parts. - 6 -...
  • Page 8: 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.
  • Page 9 PARTS LIST CD P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION R1453 401 105 3307 MT-GLAZE 2.7K JA 1/16W REF.NO. PART NO. DESCRIPTION R1454 401 105 6506 MT-GLAZE 680 JA 1/16W 614 314 9606 ASSY,PWB CD (Only Initial) R1455 401 105 8203 MT-GLAZE 68K JA 1/16W C1317 404 085 3909 ELECT 0.22U M 50V R1456...
  • Page 10 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION Q6106 405 000 3806 TR DTC114YS S6111 614 220 5471 SWITCH,TACT 405 143 0007 TR KRC107M 614 240 1002 SWITCH,TACT Q6107 405 004 5004 TR 2SA608-G-NP 645 006 5958 SWITCH,PUSH 1P-1T 405 004 4502 TR 2SA608-F-NP S6112 645 006 5958 SWITCH,PUSH 1P-1T...
  • Page 11 PARTS LIST TUNER & AMPLIFIER P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION 407 215 1608 PHOTO COUPLE TOTX178A REF.NO. PART NO. DESCRIPTION CN440 614 310 2472 PLUG,6P 614 315 1289 ASSY,PWB TUNER & AMPLIFIER 645 005 8127 PLUG,6P (Only Initial) CN441 614 310 2748 PLUG,3P,POWER C2102 404 079 6305 ELECT 10U M 50V...
  • Page 12 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION PR495 645 014 2505 PROTECTOR,0.8A 125V Q4603 405 141 3208 TR KTC3198-Y ! ! ! PR496 645 014 2512 PROTECTOR,1A 125V 405 019 2708 TR 2SC536-F-NP ! ! ! Q2140 405 020 7402 TR 2SC945A-P 405 141 3307 TR KTC3198-GR 405 020 7204 TR 2SC945A-K...
  • Page 13 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION R2308 401 105 4205 MT-GLAZE 33K JA 1/16W R4750 401 105 1105 MT-GLAZE 12K JA 1/16W R2309 401 105 4205 MT-GLAZE 33K JA 1/16W R4751 401 105 4700 MT-GLAZE 39K JA 1/16W R2311 401 105 0405 MT-GLAZE 100 JA 1/16W R4760...
  • Page 14: Tape Mechanism

    PARTS LIST POWER TRANSFORMER, CD LID SW P.A.BOARD ASSY PRIMARY P.WBOARD ASSY REF.NO. PART NO. DESCRIPTION 614 316 5170 ASSY,PWB CD LID SW (Only Initial) REF.NO. PART NO. DESCRIPTION S1900 645 044 8782 SWITCH,LEVER 614 314 9613 ASSY,PWB POWER TRNASFORMER S1901 645 044 8799 SWITCH,LEVER PRIMARY (Only Initial)
  • Page 15: Ic Block Diagram & Description

    IC BLOCK DIAGRAM & DESCRIPTION IC101 LA9241M (Servo Signal Processor) IC103 LA6541 (Pick-up Actuator & Motor Driver) Vref VIN4 VIN3 Vcc1 BH1 PH1 VR REF1 Vcc2 DRF CE DAT CL CLK 54 53 RF DET Level Level RESET Sift Driver Driver Sift FIN2...
  • Page 16 IC BLOCK DIAGRAM & DESCRIPTION IC102 LC78622NE (Digital Signal Processor) Pin Name Function Pin Name Function DEFI Input terminal for detect signal of defect TEST3 Test pin. Input terminal for test. TEST4 Test pin. O The phase comparison output terminal for - Non connection.
  • Page 17 IC BLOCK DIAGRAM & DESCRIPTION IC231 LA1844ML ( Tuner System) IC442 TDA7269 ( Stereo Amplifier) MUTE RF.AMP DECODER PILOT BUFF CANCEL ANTI-BIRDIE IN-L OUT-L P-DET STEREO LEVEL AM/FM IN-L COMP S-CURVE BUFF PILOT 304kHz TUNING DRIVE IN-R IN-R OUT-R IN-R IN-R IC251 LC72722 ( RDS Signal Processor) FLOUT CIN VREF...
  • Page 18 IC BLOCK DIAGRAM & DESCRIPTION IC601 LC867240A-5V46 (Micro Processor) Pin No Pin Name Symbol Function Pin No Pin Name Function Symbol 51 S21/PC5 LCD Pin No14 1 P06 AMBER_LED AMBER_LED Output 52 S22/PC6 LCD Pin No15 2 P07 DSP_RESET DSP Reset Signal 53 S23/PC7 LCD Pin No16 3 P10/S00...
  • Page 23: Wiring Diagram (Cd & Front)

    WIRING DIAGRAM (PRIMARY+ SECONDARY POWER TRANSFORMER AND CD LID SWITCH) POWER TRANSFORMER, PRIMARY P.W.BOARD POWER TRANSFORMER, SECONDARY P.W.BOARD CD LID SWTICH P.W.BOARD - 30 -...
  • Page 24: Voltage Table

    VOLTAGE TABLE IC101 LA9241M UNIT:V VOL(V) 2.51 2.51 2.54 2.54 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 VOL(V) 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.52 2.02 2.28 2.28 4.98 4.98 VOL(V) 4.98 1.62 2.44...
  • Page 25 VOLTAGE TABLE IC443 BA7755A UNIT:V VOL(V) 8.22 IC445 MM1453XF UNIT:V VOL(V) 3.42 3.42 3.42 3.42 3.42 3.42 3.42 3.42 3.42 3.42 3.42 4.09 3.42 7.38 IC446 NJM78L05 UNIT:V VOL(V) 17.3 0.58 5.48 IC601 LC867240A UNIT:V VOL(V) 4.75 4.75 4.75 4.75 4.83 4.83 4.75...
  • Page 26: Lcd Display Description

    LCD DISPLAY DESCRIPTION LCD60 SURR. PAD NO. COM1 COM2 COM3 COM4 PAD NO. COM1 COM2 COM3 COM4 COM1 COM2 COM3 COM4 RANDOM SLEEP SURR. REPEAT MONO - 33 -...
  • Page 27: Wiring Connection

    WIRING CONNECTION AM LOOP ANT. CN445 (10P) CN201 CN400 (32P) FM ANT. TAPE DECK CN430 TUNER & AMP P.W.B (3P) MECHANISM OPTICAL OUT (10P) CN431 PHONES CN455 CN450 VIDEO(AUDIO) IN CN440 (6P) WOOFER CN458 L-CH CN457 SPEAKER (2P) CN456 (2P) CN441 (3P) R-CH...
  • Page 28 SANYO Technosound Co., Ltd. Mar. / '01 / 1000 BB Printed in Japan Osaka, Japan...

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Dc-da370xe