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Sharp CD-BA1200H Service Manual

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SAFETY PRECAUTION FOR SERVICE MANUAL ........................................................................................................... 2
IMPORTANT SERVICE NOTES (FOR U.K. ONLY) .......................................................................................................... 3
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ...................................................................................................................................................... 6
QUICK GUIDE ................................................................................................................................................................... 7
DISASSEMBLY .................................................................................................................................................................. 9
REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 12
ADJUSTMENT ................................................................................................................................................................. 13
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 15
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 16
BLOCK DIAGRAM ........................................................................................................................................................... 17
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 20
VOLTAGE ........................................................................................................................................................................ 36
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 37
FUNCTION TABLE OF IC ................................................................................................................................................ 41
FL DISPLAY ..................................................................................................................................................................... 47
REPLACEMENT PARTS LIST/EXPLODED VIEW
All manuals and user guides at all-guides.com
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
- 1 -
CD-BA1200H
CD-BA1200H Mini Component System consisting of
CD-BA1200H (main unit) and CP-BA1200H (speaker system).
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
• Note for users in U.K.
Recording and playback of any material may require consent
which SHARP is unable to give. Please refer particularly to the
provisions of Copyright Act 1956, the Dramatic and Musical
Prefomers Protection Act 1956, the Preformers Protection Acts
1963 and 1972 and to any subsequent statutory enactments and
orders.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-BA1200H
No. S4029CDBA1200
Page

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  • Page 1: Table Of Contents

    • Note for users in U.K. Recording and playback of any material may require consent which SHARP is unable to give. Please refer particularly to the provisions of Copyright Act 1956, the Dramatic and Musical Prefomers Protection Act 1956, the Preformers Protection Acts 1963 and 1972 and to any subsequent statutory enactments and orders.

  • Page 2: Safety Precaution For Service Manual

    All manuals and user guides at all-guides.com CD-BA1200H SAFETY PRECAUTION FOR (Except for U.K.) SERVICE MANUAL Precaution to be taken when replacing and servicing the Laser Pickup. The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements.

  • Page 3: Important Service Notes (For U.k. Only)

    All manuals and user guides at all-guides.com CD-BA1200H IMPORTANT SERVICE NOTES (FOR U.K. ONLY) WITHSTANDING Before returning the unit to the customer after completion of a VOLTAGE TESTER repair or adjustment it is necessary for the following withstand PROBE voltage test to be applied to ensure the unit is safe for the customer to use.

  • Page 4: Names Of Parts

    All manuals and user guides at all-guides.com CD-BA1200H NAMES OF PARTS CD-BA1200H Front panel 1. (CD) Disc Tray 2. (CD) Disc Skip Button 3. (CD) Track Down/Review Button (TUNER) Preset Down Button (TAPE 2) Rewind Button 4. (CD) Track Up/Cue Button...
  • Page 5 All manuals and user guides at all-guides.com CD-BA1200H CD-BA1200H Remote control 1. Remote Control Transmitter LED CD control section 2. Disc Number Select Buttons 3. Memory Button 4. Pause Button 5. Clear Button 6. Track Down/Review Button 7. Track Up/Cue Button 8.

  • Page 6: Operation Manual

    All manuals and user guides at all-guides.com CD-BA1200H OPERATION MANUAL – 6 –...

  • Page 7: Quick Guide

    All manuals and user guides at all-guides.com CD-BA1200H – 7 –...
  • Page 8 All manuals and user guides at all-guides.com CD-BA1200H – 8 –...

  • Page 9: Disassembly

    All manuals and user guides at all-guides.com CD-BA1200H DISASSEMBLY CD-BA1200H Caution on Disassembly Follow the below-mentioned notes when disassembling Top Cabinet (A1)x2 the unit and reassembling it, to keep it safe and ensure ø3x12mm excellent performance: 1. Take cassette tape and compact disc out of the unit.
  • Page 10 All manuals and user guides at all-guides.com CD-BA1200H (J2) x1 Clamp Lever Turntable CD Player Unit (Top View) Disc Tray (J1) x2 Cam Gear Rib Figure 10-1 (E3)x1 CD Player Unit (E2)x2 (E2)x1 Figure 10-4 Headphones (K1) x3 (E1)x7 ø3x10mm...
  • Page 11 All manuals and user guides at all-guides.com CD-BA1200H Cam Gear (M2) x3 Mechanism Loading Motor (M1) x1 (M1) x1 (N1) x5 Figure 11-1 CP-BA1200H PROCEDURE STEP REMOVAL FIGURE Speaker 1. Net ......(A1) x1 11-2 2. Duct Panel ....(A2) x1 3.

  • Page 12: Removing And Reinstalling The Main Parts

    All manuals and user guides at all-guides.com CD-BA1200H REMOVING AND REINSTALLING THE MAIN PARTS TAPE MECHANISM SECTION TAPE 2 Perform steps 1 to 6 and 8 of the disassembly method to Record/Playback Head remove the tape mechanism. How to remove the record/playback and erase heads (TAPE 2) (See Fig.

  • Page 13: Adjustment

    All manuals and user guides at all-guides.com CD-BA1200H CD MECHANISM SECTION Perform steps 1, 2, 3, 9 and 12 of the disassembly method to remove the CD mechanism. How to remove the loading motor Loading Motor (See Fig. 13-1) 1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
  • Page 14 All manuals and user guides at all-guides.com CD-BA1200H TUNER SECTION • FM Notes: fL: Low-range frequency 1: Description of the "FM IF Adjustment" is not carried on this fH: High-range frequency Manual. It is because the IF coil in the FM front end section •...

  • Page 15: Notes On Schematic Diagram

    All manuals and user guides at all-guides.com CD-BA1200H NOTES ON SCHEMATIC DIAGRAM • The indicated voltage in each section is the one measured • Resistor: by Digital Multimeter between such a section and the chas- To differentiate the units of resistors, such symbol as K and sis with no signal given.

  • Page 16: Waveforms Of Cd Circuit

    All manuals and user guides at all-guides.com CD-BA1200H WAVEFORMS OF CD CIRCUIT Stopped Stopped 1999/04/05 17:33:17 CH1=500mV CH3=500mV 500ms/div CH1=500mV CH3=1V CH4=1V 500ms/div DC 10:1 DC 10:1 (500ms/div) DC 10:1 DC 10:1 DC 10:1 (500ms/div) NORM:20kS/s NORM:20kS/s PDO1 IC2 1...

  • Page 17: Block Diagram

    All manuals and user guides at all-guides.com CD-BA1200H OPEN/ CLAMP DISC NUMBER CLOSE UP/DOWN MOTOR TO MAIN SECTION TO DISPLAY SECTION (TO IC601) 9 10 75 76 45 46 47 48 32 31 30 LC78641E SERVO/SIGNAL CONTROL CONT5 SLDO XOUT SPDO 16.9344MHz...
  • Page 18 All manuals and user guides at all-guides.com CD-BA1200H ANTENNA FE301 CF301 Q301 CF302 CF351 TA7358AP X351 FM FRONT END 456kHz T351 CF352 AM IF IC303 AM IF FM+B MO/ST AM LOOP LA1832S ANTANNA FM IF DET./FM MPX./AM IF FM/AM MPXIN...
  • Page 19 All manuals and user guides at all-guides.com CD-BA1200H FL701 DISPLAY 11 13 15 16 19 20 22 26 14 17 18 21 27 31 32 33 Q701 VLOAD SYS.STOP IC701 IX0337AW SYSTEM AVDD SW701-SW703 MICROCOMPUTER SW709-SW721 SW723-SW725 4 5 6...

  • Page 20: Schematic Diagram / Wiring Side Of P.w.board

    All manuals and user guides at all-guides.com CD-BA1200H CD SERVO PWB-B Vref TIN1 FIN1 0.047 FIN2 TIN2 1.5M LA9235M SERVO AMP. 0.47/6.3 2.2/50 FIN1 0.02 100P ODRV FIN2 RFSW 120K 6.8K AGCON TIN1 (CH) 0.01 47/10 TIN2 100/10 REF1 0.01 0.0047...
  • Page 21 All manuals and user guides at all-guides.com CD-BA1200H CD SIGNAL 100P 0.01 100P 100P 100P 100P 100P 100P DEFECT 2.2µH EFMO VDD5V 80 79 78 77 76 75 74 72 71 70 69 68 67 66 65 0.047 PD01 COMMAND...
  • Page 22 All manuals and user guides at all-guides.com CD-BA1200H IC601 LC75341 AUDIO PROCESSOR R-CH C604 100/25 A_GND P21 12 - D L-CH C605 CNP11 C606 0.022 TO CD SERVO 22/50 CD_GND VREF INTERFACE C607 10/50 C608 10/50 C609 LOUT ROUT 0.1(ML)
  • Page 23 All manuals and user guides at all-guides.com CD-BA1200H MAIN PWB-A1(1/3) C604 100/25 C605 C606 0.022 22/50 C608 10/50 (D_GND) C610 R616 0.1(ML) 3.9K (A_GND) C612 0.1(ML) A_10V C614 0.0027 C618 1/50 C630 1/50 TUN_R C624 TUN_L 1/50 C626 1/50 R618 3.3K...
  • Page 24 All manuals and user guides at all-guides.com CD-BA1200H FL701 FL DISPLAY C705 100/10 C708 1/50 R743 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 VLOAD -20dBATT S-BUSY T-BIAS...
  • Page 25 All manuals and user guides at all-guides.com CD-BA1200H PLAY BI702 Q701 R779 KRC107M 3.3 (1/2W) CD INT CD INT WRQ(DSP) C707 R744 WRQ(DSP) 1/50 CD CE CD CE P21 12 - F R745 CD DO CD DO CNP12 100K CD DI...
  • Page 26 All manuals and user guides at all-guides.com CD-BA1200H IC901 LA4282 POWER AMP. THERMAL OVER VOL. PROTECTOR RIPPLE MUTE FILTER CIRCUIT C937 100P C936 100P C919 10/50 C911 0.022 C912 C903 0.1(ML) C917 470P R911 0.1(ML) C916 0.1(ML) (1/2W) C904 R910...
  • Page 27 All manuals and user guides at all-guides.com CD-BA1200H MAIN PWB-A1 (2/3) FM SIGNAL HEADPHONES PWB-A3 R916 R917 L903 FW902 C922 2.2mH 220P C921 JK901 220P HEADPHONES SO901 SPEAKER TERMINAL L901 0.29µH L902 SP_Lch 0.29µH SP_Rch R921 R919 R920 R918 SPEAKER...
  • Page 28 All manuals and user guides at all-guides.com CD-BA1200H C302 0.001 AM TRACKING fL T303 C331 0.047 C330 C323 0.022 (UJ) C332 0.022 AM ANT. D301 1SS133 D302 1SS133 AM LOOP ANTENNA VD301 AM BAND SVC348S COVERAGE fL C335 560P T306 R358 3.9K...
  • Page 29 All manuals and user guides at all-guides.com CD-BA1200H MAIN PWB-A1(3/3) FM SIGNAL AM SIGNAL C373 R364 R363 0.018 C371 R361 1/50 1.2K L354 LOW PASS R358 FILTER 3.9K R350 2.7K R362 C372 1.2K 1/50 C367 1/50 20 19 18 IC303 LA1832S FM IF DET./FM MPX./AM IF...
  • Page 30 All manuals and user guides at all-guides.com CD-BA1200H MAIN PWB-A1 R907 C937 Q903 IC902 IC904 E C B 3 2 1 3 2 1 R915 IC901 R923 R926 R925 R909 C906 R913 C933 C944 C909 R922 C938 C917 C943 C903...
  • Page 31 All manuals and user guides at all-guides.com CD-BA1200H SO902 AC INPUT AC 230V, 50Hz When Servicing, pay attention as the L801 area enclosed by this line ( ) is directly connected with AC main voltage. C944 C943 PT802 SUB POWER...
  • Page 32 All manuals and user guides at all-guides.com CD-BA1200H DISPLAY PWB-A2 Q701 3 2 1 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RX701 SW711 EQUALIZER/ FL701 X-BASS/DEMO C702 C719...
  • Page 33 All manuals and user guides at all-guides.com CD-BA1200H P34 5 - A TO CD SERVO PWB CNP12 CNS702 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3...
  • Page 34 All manuals and user guides at all-guides.com CD-BA1200H P30 5 - H P33 10 - A TO MAIN PWB TO DISPLAY PWB CNS601 CNS703 CD SERVO PWB-B 9 10 CNP11 CNP12 E C B ZD61 B C E CNP1 40 41...
  • Page 35 All manuals and user guides at all-guides.com CD-BA1200H P32 4 - H TAPE MECHANISM TO DISPLAY PWB ASSEMBLY CNP703 FC702 TAPE MECHANISM PWB-D TAPE MOTOR SOLENOIDE SOLENOIDE TAPE 2 TAPE 1 RECORD/PLAYBACK ERASE HEAD PLAYBACK HEAD HEAD P30 2 - C...

  • Page 36: Voltage

    All manuals and user guides at all-guides.com CD-BA1200H VOLTAGE IC101 IC901 IC701 IC303 PIN VOLTAGE NO. VOLTAGE NO. VOLTAGE VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE 1.6V 0.7V 4.78V 4.29V 2.12V 1.6V 4.78V 1.6V 0.55V 16.27V 5.0V 4.81V 2.12V 1.6V 2.16V...

  • Page 37: Troubleshooting (Cd Section)

    All manuals and user guides at all-guides.com CD-BA1200H TROUBLE SHOOTING When the CD does not function When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. Clean the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check the following items.
  • Page 38 All manuals and user guides at all-guides.com CD-BA1200H (1) Focus-HF system check Stopped CH1=500mV CH3=500mV 500ms/div Although a CD is inserted and the cover is closed, "NO DC 10:1 DC 10:1 (500ms/div) NORM:20kS/s DISC" is displayed. Press the OPEN/CLOSE switch (SW1) without inserting a disc, and try starting the playback operation.
  • Page 39 All manuals and user guides at all-guides.com CD-BA1200H (2) Tracking system check Check the TE waveform at pin 18 on IC1. The tracking servo is not activated. If the waveform shown in Figure 39-1 appears and soon after Check the peripheral circuits at pins 18 and 19 on IC1, pin 23 on NO DISC appears.
  • Page 40 All manuals and user guides at all-guides.com CD-BA1200H (4) PLL system check Stopped 1999/04/05 17:33:17 CH1=500mV CH3=1V CH4=1V 500ms/div DC 10:1 DC 10:1 DC 10:1 (500ms/div) NORM:20kS/s When a disc is loaded, start play operation. PDO1 The HF waveform is normal, but the TOC data cannot be PDO2 read.

  • Page 41: Function Table Of Ic

    All manuals and user guides at all-guides.com CD-BA1200H FUNCTION TABLE OF IC IC1 VHiLA9235M/-1: Servo Amp. (LA9235M) ODRV FIN1 LA9235M RFSW FIN2 AGCON 28 RF- FIN3 FIN4 26 N/C 25 PH 24 BH REF1 ODRV 23 N/C PH/BH 22 RFEV...
  • Page 42 All manuals and user guides at all-guides.com CD-BA1200H IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (1/2) Terminal Name Input/Output Setting in Reset Pin No. Function PDO1 Output – For PULL Phase-comparison output terminal for built-in VOC control. PDO2 Output – Phase-comparison output terminal for built-in VOC control.
  • Page 43 All manuals and user guides at all-guides.com CD-BA1200H IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (2/2) Terminal Name Input/Output Setting in Reset Pin No. Function LVDD – – L channel Power terminal for L channel. LCHO Output 1/2VDD D/A converter L channel output terminal.
  • Page 44 All manuals and user guides at all-guides.com CD-BA1200H IC701 RH-iX0337AWZZ: System Microcomputer (IX0337AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function — (+) POWER SUPPLY — — S-BUSY Output COMMUNICATE TO MPEG MICROCOMPUTER T–BIAS Output TAPE RECORD BIAS T–T1/T2...
  • Page 45 All manuals and user guides at all-guides.com CD-BA1200H IC701 RH-iX0337AWZZ: System Microcomputer (IX0337AW) (2/2) Pin No. Port Name Terminal Name Input/Output Function P120 T2 PLAY SW_B Input PLAY SWITCH FOR T2 P119 Input TAPE 2 A–SIDE FULL PROOF P118 Input...
  • Page 46 All manuals and user guides at all-guides.com CD-BA1200H IC601 VHiLC75341/-1: Audio Processor (LC75341) ROUT LOUT LBASS RBASS LTRE RTRE LSEL0 RSEL0 R1 R2 24 23 22 21 20 19 18 17 16 15 14 13 LC75341 10 11 12 Figure 46 BLOCK DIAGRAM OF IC...

  • Page 47: Fl Display

    All manuals and user guides at all-guides.com CD-BA1200H FL701 VVKSVA9MS13-1: FL Display h j k Figure 47 FL DISPLAY – 47 –...
  • Page 48 All manuals and user guides at all-guides.com CD-BA1200H — M E M O — – 48 –...
  • Page 49 CD-BA1200H PARTS GUIDE CD-BA1200H MODEL CD-BA1200H Mini Component System consisting of CD-BA1200H (main unit) and CP-BA1200H (speaker system). “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the For U.S.A. only following information. Contact your nearest SHARP Parts Distributor to order.
  • Page 50 All manuals and user guides at all-guides.com CD-BA1200H PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK COILS CD-BA1200H AC 0.82 µH VP-XHR82K0000 INTEGRATED CIRCUITS AB 2.2 µH,Choke VP-XH2R2K0000 L101,102 VP-DH2R2K0000 AB 2.2 mH,Peaking VHILA9235M/-1 AQ Servo Amp.,LA9235M AB 100 µH,Choke...
  • Page 51 All manuals and user guides at all-guides.com CD-BA1200H PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PARTS CODE RANK RANK AA 0.01 µF,16V C120,121 VCKYMN1HB561K J AA 560 pF,50V C714 VCTYMN1CY103N J AB 1 µF,50V,Electrolytic AB 3.3 µF,50V,Electrolytic C122,123 VCEAZA1HW105M J C715 VCEAZA1HW335M J AA 0.022 µF,25V...
  • Page 52 All manuals and user guides at all-guides.com CD-BA1200H PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R81,82 VRS-TV2AB222J AA 2.2 kohms,1/10W R617 VRD-ST2CD332J AA 3.3 kohms,1/6W R83,84 VRS-TV2AB103J AA 10 kohm,1/10W R618 VRD-MN2BD332J AA 3.3 kohms,1/8W VRS-TV2AB682J AA 6.8 kohms,1/10W...
  • Page 53 All manuals and user guides at all-guides.com CD-BA1200H PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PARTS CODE RANK RANK OTHER CIRCUITRY PARTS XHBSD20P05000 AA Screw,ø2×5mm XBBSD20P03000 AA Screw,ø2×3mm LX-WZ1070AFZZ AA Washer,ø1.5×ø3.8×0.25mm BI4/CNS4 QCNWN1572AWZZ J AF Connector Ass’y,6/6Pin BI601/CNS601 QCNWN1540AWZZ J AF Connector Ass’y,5/5Pin...
  • Page 54 All manuals and user guides at all-guides.com CD-BA1200H PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK 92LPT0309509 AD Gear,Drive CP-BA1200H 92LPT0309510 AE Gear,Pulley 92LPT0309511 AD Gear,Middle SPEAKER BOX PARTS 92LPT0311101 AB Lever,Clamp 92LPT0311102 AC Lever,Disc 92LJ1911B AU Net Frame Ass’y...
  • Page 55 All manuals and user guides at all-guides.com CD-BA1200H CD-BA1200H 306-2 306-1 306-3 703x2 305x2 PWB-C Figure 6 CD MECHANISM EXPLODED VIEW – 6 –...
  • Page 56 All manuals and user guides at all-guides.com CD-BA1200H CD-BA1200H BELT CONNECTION 601x3 FF/REW FF/REW ROLLER ROLLER ASS'Y ASS'Y 202-1 FLYWHEEL FLYWHEEL ASS'Y ASS'Y MAIN BELT TAPE 2 TAPE 1 PWB-A2 605x9 621x7 202-2 610x3 IC902 610x2 IC904 PWB-A3 614x2 Q905...
  • Page 57 All manuals and user guides at all-guides.com CD-BA1200H CD-BA1200H 604x2 604x2 MECHANISM 250x4 PWB-E 239x4 204-2 204-1 204-3 PWB-B Figure 8 CABINET EXPLODED VIEW (2/2) – 8 –...
  • Page 58 All manuals and user guides at all-guides.com CD-BA1200H CP-BA1200H SP1(L-CH) SP2(R-CH) 905x4 SPEAKER SP1(L-CH) SP2(R-CH) SPEAKER SP1(L-CH) SP2(R-CH) Figure 9 SPEAKER EXPLODED VIEW – 9 –...

  • Page 59: Packing Method (For U.k. Only)

    All manuals and user guides at all-guides.com CD-BA1200H PACKING METHOD (FOR U.K. ONLY) 11. Label, Energy TLABZ0604AWZZ Setting position of switches and knobs 12. Label, Saving Energy TLABZ0605AWZZ Tape Mechanism STOP 13. Label, Feature, Tape 1 TLABZ0788AWZZ 14. Label, Feature, Tape 2...
  • Page 60 All manuals and user guides at all-guides.com CD-BA1200H © COPYRIGHT 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any from or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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