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Sanyo DC-BM300 Service Manual

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Service Manual
Contents
Specifications ................................................................... 1
System connections ......................................................... 1
What to do if ..................................................................... 2
Laser beam safety precaution .......................................... 2
CD pick-up maintenance .................................................. 2
Tape adjustments ............................................................ 3
Tuner adjustments ........................................................... 4
Exploded view
(Cabinet & Chassis) ...................................................... 5
(Tape mechanism) ........................................................ 9
(Cabinet & Chassis) ...................................................... 6
(Tape mechanism) ........................................................ 9
This service manual consists of "DC-BM300U/XE" (Main unit : 129 618 00)
and "SX-BM300/XE" (Speaker system : 165 043 00).
Micro Component System
IC block diagram & description ........................................ 10
FL display description ...................................................... 14
(CD) ............................................................................... 16
(FRONT) ....................................................................... 18
(AMPLIFIER) ................................................................. 22
(TUNER) ....................................................................... 24
(CD) ............................................................................... 15
(FRONT) ....................................................................... 20
(AMPLIFIER & TUNER) ................................................ 26
(CD LED, SOCKET & POWER SUPPLY) .................... 28
Wiring connection ............................................................ 29
FILE NO.
DC-BM300
(XE)
PRODUCT CODE No.
129 617 00
SM
REFERENCE No.
5810317

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  Summary of Contents for Sanyo DC-BM300

  • Page 1: Table Of Contents

    FILE NO. Service Manual Micro Component System DC-BM300 (XE) Contents PRODUCT CODE No. 129 617 00 Specifications ..............1 IC block diagram & description ........10 System connections ............1 FL display description ............14 What to do if ..............2 Schematic diagram Laser beam safety precaution ..........
  • Page 2: Specifications

    SPECIFICATIONS Tuner General Reception frequency: Output power ......12.5 W x 2 FM : 87.5 - 108.0 MHz (at 4 ohms, 10% distortion) AM : 522 - 1611kHz (9 kHz step) Inputs ........VIDEO IN : 500 mV / 50k ohms 520 - 1610 kHz (10 kHz step) Outputs ........
  • Page 3: What To Do If

    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

    TAPE ADJUSTMENTS 1. Azimuth Adjustment • Be sure to clean the heads before attempting to make any adjustment. EJECT ST ANDBY CLOCK/TIME / ON • Be sure both channels (1 and 2) are the same level. TUNING + RDSMODE TUNING - MEMOR Y (Using a dual-channel oscilloscope) F U L L L O G I C C O N T R O L / A U T O R E V E R S E...
  • Page 5: Tuner Adjustments

    TUNER ADJUSTMENTS • Use a plastic screw driver for adjustments. • Speaker impedance : 4 ohm • TUNING FM : 87.5 - 108MHz AM : 522 - 1611 kHz (9 kHz step) 520 - 1610 kHz (10 kHz step) L2151 CT252 TP12 TP24 TP25...
  • Page 7: 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 DESIGNATED IN THE PARTS LIST IN THIS MANUAL.
  • Page 8 PARTS LIST FRONT P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION S6211 645 006 5958 SWITCH,PUSH 1P-1T REF.NO. PART NO. DESCRIPTION 614 240 1002 SWITCH,TACT 614 323 0342 ASSY,PWB FRONT(Only Initial) 614 220 5471 SWITCH,TACT BR601 614 318 6991 HOLDER,FL,HOLDER-FL S6212 645 006 5958 SWITCH,PUSH 1P-1T C6011 403 262 8607 DL-ELECT 0.047F Z 5.5V 614 240 1002 SWITCH,TACT...
  • Page 9 PARTS LIST REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION D2103 407 012 4406 DIODE 1SS133 Q4502 405 000 3806 TR DTC114YS D2151 407 012 4406 DIODE 1SS133 405 143 0007 TR KRC107M D2153 407 105 1602 VARACTOR DI SVC342M-V Q4600 405 155 0002 TR MPSA56 407 105 1305 VARACTOR DI SVC342L-V...
  • Page 10: Tape Mechanism

    PARTS LIST CD LED P.W.BOARD ASSY REF.NO. PART NO. DESCRIPTION D1480 407 012 5809 DIODE 1SS176 REF.NO. PART NO. DESCRIPTION 407 012 4406 DIODE 1SS133 614 324 6336 ASSY,PWB CD LED(Only Initial) D1601 407 148 6701 DIODE 1A3-I CN645 614 035 4911 SOCKET,DIP 2P,FRONT-LED D1981 407 099 5204 ZENER DIODE MTZJ5.1B CN651...
  • Page 11: Ic Block Diagram & Description

    IC BLOCK DIAGRAM & DESCRIPTION IC101 LA9241ML (Servo Signal Processor) IC132 LB1641L (Bidirectional Motor Driver) Vcc1 BH1 PH1 LF2 VR REF1 Vcc2 DRF CE DAT CL CLK 54 53 RF DET PRE- DRIVE INTER FACE OUT1 FIN2 FIN1 DGND INPUT LOGIC CIRCUIT RFS- RF Amp RFSM...
  • Page 12 IC BLOCK DIAGRAM & DESCRIPTION IC231 LA1844ML (Tuner System) RF.AMP DECODER PILOT BUFF CANCEL ANTI-BIRDIE P-DET STEREO LEVEL AM/FM COMP S-CURVE BUFF PILOT 304kHz TUNING DRIVE IC440 AN7348K ( Play/Rec Pre Amp) A/Rec Mute PB Amp(L) Nor/Cro Amp(L) & Hi/Lo Logic PB Amp(R) Amp(R)
  • 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 LC866540A-50C9 (Micro Processor) PIN NAME NAME DESCRIPTION PIN NAME NAME DESCRIPTION P16/BUZ JOG+ I Input JogDial FL drive output power P17/PWM0 JOG- I Input JogDial S20/PC4 O FL Segment output (P13) D_CLK O Serial clock output for Tu/Vol_Func IC S21/PC5 O FL Segment output (P12) D_OUT...
  • Page 15: Fl Display Description

    FL DISPLAY DESCRIPTION FL601 PIN No. CONNECTION P16 P15 PIN No. CONNECTION P14 P13 P12 P11 (2G~9G) - 14 -...
  • Page 16 WIRING DIAGRAM (CD) J1308 J1306 J1307 LIMIT J1300 J1302 J1401 J1303 J1402 J1403 J1404 J1305 J1301 J1309 J1508 C1401 DGND CD_R R1473 L1451 AGND CD_L R1330 R1331 C1496 IC102 LC78622NE IC101 LA9241M J1320 J1415 R1312 J1317 J1316 J1411 C1341 C1471 R1453 R1308 R1304 J1318...
  • Page 17: Schematic Diagram

    SCHEMATIC DIAGRAM (CD) R1461 DSP_RESET R1462 CQCK R1463 COIN R1475 SQOUT R1465 PICK UP C1335 R1453 SF-P101N 10;50 Q1301 2.7K C1491 2SB810 0.01 COMMON IC101 LA9241M DEFI EFLG FIN2 C1302 1000P SBSY S.DVCC R1337 C1451 R1454 RFVCC 6.8K C1773 R1771 LASER FIN1 VPPC...
  • Page 18 SCHEMATIC DIAGRAM (FRONT) D6010 L6010 1SS133 10/K 0.047F/5.5V C6011 R6009 R6010 C6118 100P C6010 1000/6.3 C6117 100P C6116 100P FL601 S6001 C6111 100P 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 C6110 100P MOTOR...
  • Page 19 WIRING DIAGRAM (FRONT) STAND_BY_LED S6119 S6218 POWER CLOCK/TIMER S6217 S6118 TU_UP FM_MODE S6216 S6117 TU_DOWN MEMORY J6100 S6215 S6116 TUNER/BAND FUNCTION CN604 +B GND TO CD_TRAY_LED C6011 1AD4B10D1260A J6101 J6300 X6101 J6103 J6104 X6102 C6010 T002 94V-0 R6115 Q6108 J6108 C6215 S6001 C6013...
  • Page 20 SCHEMATIC DIAGRAM (AMPLIFIER) R4820 R4703 R4821 CD_R L4881 L4781 R4822 4.7K TDA7265 IC442 TU_R R4823 C4703 560P AUX_R R4881 R4825 220K L-OUT Q4700 KRC107 R4922 R4781 R-OUT TU_DO R4963 C4833 VF_CE 1/50 26.0V +8.5V R4923 15.3V HEAD PHONE R-IN R-NF L-NF MUT/ST-BY L-IN...
  • Page 21 SCHEMATIC DIAGRAM (TUNER) R2204 XF211 IC211 220K XF222 XF233 LA1186N T2002 C2114 R2201 R2306 XF221 Q2201 C2306 1;50 KTC3195 XF231 2.7K C2322 R2205 1000P C2305 0.47;50 C2321 1;50 R2202 C2105 R2105 C2111 R2301 0.01 1.5K 1000P FM IF AM MIX AM IF FM DET MUTE...
  • Page 22 WIRING DIAGRAM (AMPLIFIER &TUNER) CN455 R4881 C4844 C4744 R4781 J4300 D2451 D4348 C4344 J4301 J4602 D4345 R2461 J4302 J4603 T-DOUT R2464 TCLK J2100 C4345 R4324 R2462 C4997 D4344 J2600 C4994 J2601 J4606 J4308 CN400 C4342 J4607 J2602 J4309 D4993 D4343 R4321 R4322 J2101...
  • Page 23: Wiring Diagram (Cd)

    WIRING DIAGRAM (CD LED, SOCKET & POWER SUPPLY) CD LED P.W.BOARD T002 94V-0 1AD4B10D1260C D6401 C6401 CN645 SOCKET P.W.BOARD POWER SUPPLY P.W.BOARD D4282 C4282 D4280 J4200 C4280 CN420 1AD4B10D1250C D4281 C4281 T002 94V-0 D4283 J4201 C4283 J4202 L4191 This is a basic wiring diagram. - 28 -...
  • Page 24: (Amplifier & Tuner)

    CN400 (28P) CN455 PHONES CN645 (2P) (10P) CD LED P.W.B CN604 (2P) FL601 CN601 (28P) FRONT P.W.B TAPE DECK MECHANISM This is a basic wiring connection. SANYO Electric Co., Ltd. Osaka, Japan Jun./ '02 Printed in Japan - 29 -...

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Dc-bm300xe