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Sanyo DC-DA280 Service Manual

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Service Manual
LINE
REPEAT/FM MODE
PRESET
MEMORY
VOLUME
TUNER
SOUND
TUNING
/BAND
PRESET
REMOTE CONTROLLER RB-DA280AR
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
(Tape mechanism) ........................................................ 9
(Cabinet & Chassis) ...................................................... 6
(Tape mechanism) ........................................................ 9
AU: This service manual consists of "DC-DA280U/AU" (Main unit : 129 621 05) and
"SX-DA280/UK" (Speaker system : 165 046 00).
KR: This service manual consists of "DC-DA280U/KR" (Main unit : 129 621 07) and
"SX-DA280/KR" (Speaker system : 165 046 05).
Micro Component System
IC block diagram & description ........................................ 9
LCD display description ................................................... 14
Wiring connection ............................................................ 15
Schematic diagram
(FRONT) ....................................................................... 16
(CD) ............................................................................... 18
(AMPLIFIER for AU) ...................................................... 22
(AMPLIFIER for KR) ...................................................... 24
(TUNER for AU) ............................................................ 26
(TUNER for KR) ............................................................ 28
Wiring diagram
(FRONT & CD) .............................................................. 20
(AMPLIFIER & TUNER for AU) ..................................... 30
(AMPLIFIER & TUNER for KR) ..................................... 32
(POWER TRANSFORMER) ......................................... 34
FILE NO.
DC-DA280
(AU)
(KR)
PRODUCT CODE No.
129 622 05 (AU)
129 622 07 (KR)
SM
REFERENCE No.
5810288

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  Summary of Contents for Sanyo DC-DA280

  • Page 1: Table Of Contents

    FILE NO. Service Manual Micro Component System DC-DA280 (AU) (KR) LINE REPEAT/FM MODE PRESET MEMORY VOLUME TUNER SOUND TUNING /BAND PRESET REMOTE CONTROLLER RB-DA280AR Contents PRODUCT CODE No. 129 622 05 (AU) 129 622 07 (KR) Specifications ..............1 IC block diagram & description ........9 System connections ............
  • Page 2: Specifications

    SPECIFICATIONS Tuner General Reception frequency Output power ......4W x 2 FM : 87.5 - 108.0 MHz (at 4 ohms, 10% distortion) AM: 522 - 1710kHz (9 kHz step) Outputs ........SPEAKERS : 4 ohms 520 - 1710kHz (10 kHz step) PHONES : 8 - 32 ohms Power requirements ....
  • 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 1. Switch "ON" the POWER. (RF) 2. Connect an oscilloscope to TP1 (RF) and TP4 (VC). OSCILLOSCOPE 3. Load the test disc. 4. Press the PLAY button. (VC) 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 : TUNER • Speaker impedance : 4 ohm • TUNING FM : 87.5 - 108MHz AM : 522 - 1710kHz, 520 - 1710kHz TP13 TP11 T2002 L2153 XF233 TP14 TP15 TP24 L2103...
  • 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...
  • Page 8 PARTS LIST FRONT P.W.BOARD ASSY CD P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION 614 324 1140 ASSY,PWB,FRONT(Only Initial) 614 320 0444 ASSY,PWB,CD(Only Initial) AC601 614 320 3469 COVER,LED CN111 645 026 2463 SOCKET,FFC 15P AH601 614 320 3483 HOLDER,LCD 645 040 0513 SOCKET,FPC 15P AS601 614 314 9286 DEC,SHEET,LCD...
  • Page 9 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION D4961 407 012 4406 DIODE 1SS133 Q4930 405 033 6805 TR 2SD1468S-S D4963 407 012 4406 DIODE 1SS133 405 033 6706 TR 2SD1468S-R D4964 407 012 4406 DIODE 1SS133 405 021 0600 TR 2SD1012-G-SPA HS401 614 319 7065 HEAT SINK,HEATSINK 405 151 4400 TR KTD1303...
  • Page 10: (Tape Mechanism)

    EXPLODED VIEW & PARTS LIST(TAPE MECHANISM) TAPE MECHANISM REF.NO. PART NO. DESCRIPTION 614 315 4839 ASSY,MECHA,TM-DA370TN-SH TM01 TM01 645 045 1799 R/P HEAD KC-9142EA-0321 TM02 645 010 9447 PINCH ROLLER(F) ASSY TM02 TM03 645 045 1959 RF BELT TM04 645 045 1997 MAIN BELT TM05 645 045 2048 DETECT SWITCH MXS01190 TM06...
  • Page 11 IC BLOCK DIAGRAM & DESCRIPTION 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 12 IC BLOCK DIAGRAM & DESCRIPTION IC102 LC78622NE (Digital Signal Processor) No. Pin Name I/O Function No. Pin Name I/O Function TEST3 I Test pin. DEFI I Input terminal for detect signal of defect TEST4 I Test pin. I Input terminal for test. O The phase comparison output terminal for - Non connection.
  • Page 13 IC BLOCK DIAGRAM & DESCRIPTION IC231 LA1844ML ( Tuner System) IC241 LC72121M-D (Pll Synthesizer) Vssx RF.AMP REFERENCE PHASE DETECTOR PILOT DECODER BUFF DIVIDER CHARGE PUMP CANCEL ANTI-BIRDIE XOUT P-DET STEREO SWALLOW COUNTER UNLOCK FMIN 1/16, 1/17 4bits DETECTOR AOUT LEVEL AM/FM COMP S-CURVE...
  • Page 14 IC BLOCK DIAGRAM & DESCRIPTION IC440 AN7348K ( Play/Rec Pre Amp) A/Rec Mute PB Amp(L) Nor/Cro Amp(L) & Hi/Lo Logic PB Amp(R) Amp(R) A/Rec Mute Ripple Logic Rejection Logic Rec/PB IC601 LC867232A-5Z21 (Micro Processor) PIN NAME NAME DESCRIPTION PIN NAME NAME DESCRIPTION S19/PC4...
  • Page 15: Lcd Display Description

    LCD DISPLAY DESCRIPTION LCD60 (DIGIT 2) (DIGIT 1,3,4) PAD NO. IC NO. COM1 COM2 COM3 COM3 COM2 COM1 JAZZ PROG. SURR BASS CLASSIC REV PLAY FWD PLAY ROCK - 14 -...
  • Page 16: Wiring Connection

    WIRING CONNECTION AMPLIFIER & TUNER P.W.B CN400 (28P) CN202 CN445 AM LOOP ANT. (9P) PHONES CN443 CN201 FM ANT. CN440 (6P) LINE IN CN442 CN402 CN601 (28P) CN401 CN441 FRONT P.W.B (2P) L-CH AC IN SPEAKER CD P.W.B CN422 CN421 CN111 CN113 (15P)