Table of Contents
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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
What to do if ..................................................................... 5
When assembling the Rack Gear and CD Lid ................. 5
When replacing LED (D6310) .......................................... 5
(Cabinet & Chassis) ...................................................... 6
(Tape mechanism) ........................................................ 11
(Cabinet & Chassis) ...................................................... 7
(CD mechanism) ........................................................... 7
(Tape mechanism) ........................................................ 11
This service manual consists of "DC-DA370U" (Main unit : 129 598 00) and "SX-DA370"
(Speaker system : 165 027 00).
Micro Component System
IC block diagram & description ........................................ 11
LCD display description ................................................... 15
(CD) ............................................................................... 16
(FRONT) ....................................................................... 18
(AMPLIFIER ) ................................................................ 24
(TUNER) ....................................................................... 26
(CD & FRONT) .............................................................. 20
(TUNER & AMPLIFIER ) ............................................... 22
TRANSFORMER AND CD LID SWITCH) .................... 28
Voltage Table ................................................................... 29
Wiring connection ............................................................ 31
FILE NO.
DC-DA370
(UK)
PRODUCT CODE No.
129 599 00
SM
REFERENCE No.
5810201
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Table of Contents
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Summary of Contents for Sanyo DC-DA370
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Page 1: Table Of Contents
(CD & FRONT) ... 20 (TUNER & AMPLIFIER ) ... 22 (PRIMARY + SECONDARY POWER TRANSFORMER AND CD LID SWITCH) ... 28 Voltage Table ... 29 Wiring connection ... 31 FILE NO. DC-DA370 (UK) PRODUCT CODE No. 129 599 00 REFERENCE No. 5810201... -
Page 2: Specifications
SPECIFICATIONS Tuner Reception frequency ... FM : 87.5 - 108.0 MHz MW: 522 - 1611kHz LW : 144 - 288kHz CD player Channels ... 2-channel stereo Sampling frequency ... 44.1 kHz Pick-up ... Optical 3-beam semiconductor laser Wow and Flutter ... Below measurable limits Wave length ... -
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. 2. Connect an oscilloscope to TP1 (RF) and TP4 (VC). 3. Load the test disc. 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 1. FM Step Adjusting Circuit Input 98.0MHz.Input Level... -
Page 6: What To Do If
WHAT TO DO IF If the operation of the unit or display is not normal, even though the appropriate buttons have been pressed. Disconect the power cord from the AC outlet, then press "RESET" (rear of the unit) for at least 30 seconds. WHEN ASSEMBLING THE RACK GEAR AND CD LID When assembling the rack gear and CD lid, "A"part should be inserted into the "B"... -
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 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 OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS MANUAL. - Page 9 PARTS LIST CD P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION 614 314 9606 ASSY,PWB CD (Only Initial) CN111 645 040 0513 SOCKET,FPC 15P 645 026 2463 SOCKET,FFC 15P CN113 645 005 8127 PLUG,6P,BASEMECHA 614 310 2472 PLUG,6P,BASEMECHA CN114 645 005 9292 PLUG,5P 614 310 2465 PLUG,5P CN115 614 316 7990 ASSY,WIRE,WIRE...
- Page 10 PARTS LIST REF.NO. PART NO. DESCRIPTION S6218 614 240 1002 SWITCH,TACT 645 006 5958 SWITCH,PUSH 1P-1T 614 220 5471 SWITCH,TACT S6219 645 006 5958 SWITCH,PUSH 1P-1T 614 240 1002 SWITCH,TACT 614 220 5471 SWITCH,TACT S6220 645 006 5958 SWITCH,PUSH 1P-1T 614 240 1002 SWITCH,TACT 614 220 5471 SWITCH,TACT SE601...
- Page 11 PARTS LIST REF.NO. PART NO. DESCRIPTION 405 000 0904 TR DTA114YS 405 078 2404 TR BN1A4P Q2452 405 078 2404 TR BN1A4P 405 000 0904 TR DTA114YS 405 151 5209 TR KRA107M 405 036 3702 TR 2SA1564 Q2453 405 036 3702 TR 2SA1564 405 151 5209 TR KRA107M 405 000 0904 TR DTA114YS 405 078 2404 TR BN1A4P...
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Page 12: Tape Mechanism
PARTS LIST(TAPE MECHANISM) ※ ※ ※ ※ ※ IC BLOCK DIAGRAM & DESCRIPTION IC101 LA9241M (Servo Signal Processor) Vcc1 BH1 PH1 VR REF1 Vcc2 RF DET FIN2 FIN1 μ-com INTER FACE TESI T.SERVO & T.LOGICK SPINDLE SERVO F.SERVO & F.LOGICK AGND TAPE MECHANISM REF.NO. - Page 13 IC BLOCK DIAGRAM & DESCRIPTION IC440 AN7348K ( Play/Rec Pre Amp) A/Rec Mute PB Amp(L) PB Amp(R) A/Rec Mute Logic IC445 MM1453XF (Q Xpander with Spread Control) VIRTUAL AUDIO QXpander Bias PROCESSOR IC231 LA1844ML ( Tuner System) BUFF LEVEL S-CURVE Nor/Cro Amp(L) &...
- Page 14 IC BLOCK DIAGRAM & DESCRIPTION IC102 LC78622NE (Digital Signal Processor) Pin Name Function DEFI Input terminal for detect signal of defect Input terminal for test. O The phase comparison output terminal for external VCO control. VVSS - Ground terminal for built-in VCO ISET Resistance connection terminal for electric current adjustment of PDO output.
- Page 15 IC BLOCK DIAGRAM & DESCRIPTION IC601 LC867240A-5V46 (Micro Processor) Pin No Pin Name Symbol 1 P06 AMBER_LED AMBER_LED Output 2 P07 DSP Reset Signal DSP_RESET 3 P10/S00 CD_DSPInterface(command+data Output) COIN 4 P11/SIO/SB0 CD_DSPInterface(SubQ dataInput) SQOUT 5 P12/SCK0 CQCK CD_DSPInterface(Clock) 6 P13/S01 Processor VD_GND Output...
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Page 16: Lcd Display Description
LCD DISPLAY DESCRIPTION LCD60 PAD NO. COM1 COM2 COM1 COM2 SURR. COM3 COM4 PAD NO. COM1 COM3 COM4 SLEEP - 15 - COM2 COM3 COM4 RANDOM SURR. REPEAT MONO... -
Page 17: Schematic Diagram (Cd)
SCHEMATIC DIAGRAM (CD) PRODUCT SAFETY NOTICE Each precaution in this manual should b e f o l l o w e d d u r i n g s e r v i c i n g . Components identified with the IEC symbol ! ! ! in the parts list and the... -
Page 18: (Front)
SCHEMATIC DIAGRAM (FRONT) 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 19: (Amplifier )
SCHEMATIC DIAGRAM (AMPLIFIER) This is a basic schematic diagram. - 24 - PRODUCT SAFETY NOTICE Each precaution in this manual should be followed during servicing. Components identified with the IEC symbol designated components in which safety can be of special significance. When replacing a component identified by or parts with the same ratings of resistance, wattage or voltage that are designated in the parts list in this manual. -
Page 20: (Tuner)
SCHEMATIC DIAGRAM (TUNER) This is a basic schematic diagram. - 26 - - 27 -... -
Page 21: 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 - 28 -... -
Page 22: Voltage Table
VOLTAGE TABLE IC101 LA9241M VOL(V) 2.51 2.51 2.54 2.54 VOL(V) 2.52 2.52 2.52 VOL(V) 4.98 VOL(V) 4.99 2.53 2.53 IC102 LC78622NE VOL(V) VOL(V) 2.46 VOL(V) 2.03 2.04 VOL(V) 4.71 4.63 4.75 IC103 LA6541 VOL(V) 8.63 4.81 2.51 2.52 VOL(V) 3.93 3.93 2.53 2.53... - Page 23 VOLTAGE TABLE IC445 MM1453XF VOL(V) 3.42 3.42 IC446 NJM78L05 UNIT:V VOL(V) 17.3 0.58 5.48 IC601 LC867240A VOL(V) 4.75 4.75 4.85 4.85 VOL(V) VOL(V) 4.67 VOL(V) 2.41 2.41 2.41 2.41 VOL(V) 2.41 2.41 2.41 2.41 VOL(V) 4.73 TRANSOSTOR Q4410 Q4501 Q4502 Q4600 Q4601 Q4602 Q4603 Q4700 Q4800 Q4950 Q4960 Q4961 Q4962 Q4963 Q4990 Q4991 Q4992 Q4993 5.46 4.02 5.45...
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Page 24: Wiring Connection
MOTOR P.W.B CD MECHANISM AM LOOP ANT. CN201 FM ANT. CN430 (3P) OPTICAL OUT CN431 CN450 VIDEO(AUDIO) IN WOOFER CN458 L-CH CN457 SPEAKER (2P) CN456 (2P) R-CH SPEAKER CN113 (6P) CN111 (15P) (15P) (6P) SANYO Technosound Co., Ltd. Osaka, Japan... - Page 25 WIRING DIAGRAM (CD & FRONT) CD P.W.BOARD FRONT P.W.BOARD - 20 - - 21 -...
- Page 26 WIRING DIAGRAM (TUNE & AMPLIFIER ) AMPLIFIER P.W.BOARD TUNER P.W.BOARD - 22 - - 23 -...