Table of Contents
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Illustration: CD-BA120
Illustration: CD-BA125
IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY) ....................................................................................................... 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 5
QUICK GUIDE ................................................................................................................................................................... 6
DISASSEMBLY .................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 10
ADJUSTMENT ................................................................................................................................................................. 11
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 13
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 14
BLOCK DIAGRAM ........................................................................................................................................................... 15
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD .............................................................................................. 18
VOLTAGE ........................................................................................................................................................................ 34
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 35
FUNCTION TABLE OF IC ................................................................................................................................................ 39
FL DISPLAY ...................................................................................................................................................................... 45
REPLACEMENT PARTS LIST/EXPLODED VIEW
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
CD-BA120
CD-BA120 Mini Component System consisting of CD-BA120
(main unit) and CP-BA120 (speaker system).
CD-BA125
CD-BA125 Mini Component System consisting of
CD-BA125 (main unit), CP-BA125 (Front speaker) and
GBOXS0042AWM1 (rear spaeker).
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CD-BA120/125
No. XXXXXXXXXXXXX
Page
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Table of Contents
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Summary of Contents for Sharp CD-BA120
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Page 1: Table Of Contents
CD-BA120/125 SERVICE MANUAL No. XXXXXXXXXXXXX CD-BA120 Illustration: CD-BA120 CD-BA120 Mini Component System consisting of CD-BA120 (main unit) and CP-BA120 (speaker system). CD-BA125 CD-BA125 Mini Component System consisting of CD-BA125 (main unit), CP-BA125 (Front speaker) and GBOXS0042AWM1 (rear spaeker). Illustration: CD-BA125 •... -
Page 2: Important Service Notes (For U.s.a. Only)
CD-BA120/125 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES (FOR U.S.A. ONLY) BEFORE RETURNING THE AUDIO PRODUCT (Fire & Shock Hazard) Before returning the audio product to the user, perform the following safety checks. -
Page 3: Names Of Parts
CD-BA120/125 NAMES OF PARTS CD-BA120/125 Front panel (CD) Disc Tray (CD) Disc Number Indicators Timer Indicator Record Indicator 3 4 5 Sleep Indicator Extra Bass Indicator (CD/TUNER) Memory Indicator FM Stereo Mode Indicator FM Stereo Indicator (CD) Repeat Indicator (CD/TAPE) Play Indicator... - Page 4 CD-BA120/125 Rear panel AC Power Input Socket Rear Speaker Terminals (CD-BA125 Only) Front Speaker Terminals FM/AM Loop Aerial Socket CP-BA120/125 Front speaker Woofer Bass Reflex Duct Speaker Wire GBOXS0042AWM1 Rear speaker (CD-BA125 Only) Full-Range Speaker Speaker Wire CD-BA120/125 Remote control...
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Page 5: Operation Manual
CD-BA120/125 OPERATION MANUAL – 5 –... -
Page 6: Quick Guide
CD-BA120/125 – 6 –... -
Page 7: Disassembly
CD-BA120/125 DISASSEMBLY CD-BA120/125 Caution on Disassembly Follow the below-mentioned notes when disassembling (A1)x2 Top Cabinet 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 8 CD-BA120/125 (H2) x1 CLAMP LEVER Turntable CAM GEAR RIB Disc Tray (H) x2 Figure 8-1 CD Player Unit Figure 8-4 (D1)x7 ø3x10mm (D2)x2 Headphones (J1) x3 (D2)x2 (E1)x3 (D1)x1 ø3x8mm ø3x10mm Main PWB (D3)x1 Figure 8-2 (J1) x3 Figure 8-5...
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Page 9: Speaker Box
CD-BA120/125 Cam Gear (L2) x3 Mechanism Loading Motor (L1) x1 (L1) x1 (M1) x5 Figure 9-1 CP-BA120/125 PROCEDURE STEP REMOVAL FIGURE Speaker 1. Net ......(A1) x1 2. Duct Panel ....(A2) x1 3. Screw ...... (A3) x4 CP-BA120/125 Speaker Box... -
Page 10: Removing And Reinstalling The Main Parts
CD-BA120/125 REMOVING AND REINSTALLING THE MAIN PARTS TAPE MECHANISM SECTION TAPE2 Perform steps 1 to 5 and 7 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. 10-1) 1. -
Page 11: Adjustment
CD-BA120/125 CD MECHANISM SECTION Perform steps 1, 2, 3, 9, 12 and 13 of the disassembly method to remove the CD mechanism. How to remove the loading motor Loading Motor (See Fig. 11-1) 1. Bend the hooks (A1) x 5 pcs., to remove the loading motor. -
Page 12: Tuner Section
CD-BA120/125 • FM RF TUNER SECTION Signal generator: 1 kHz, 22.5 kHz dev., FM modulated fL: Low-range frequency fH: High-renge frequency Test Stage Frequency Frequency Serring/ Instrument Display Adjusting Connection • AM IF/RF Point Signal generator: 400 Hz, 30%, AM modulated FM Band —... -
Page 13: Notes On Schematic Diagram
CD-BA120/125 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 14: Waveforms Of Cd Circuit
CD-BA120/125 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 IC2 24 PDO2 IC2 2 IC2 23... -
Page 15: Block Diagram
CD-BA120/125 CLAMP DISC OPEN/ 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 SLD0 XOUT SPD0 16.9344MHz VDD5V 5 18 36 44 49 50... - Page 16 CD-BA120/125 FM IF IC301 T302 CF303 TA7358AP BF301 CF351 X351 FM FRONT END 456KHz CF352 T351 AM IF CNP301 AM MIX AM IF MO/ST L312 FM RF T301 IC303 LA1832S FM/AM FM/AM IF MPX. MPXIN FM/AM OSC BUFF FM OSC...
- Page 17 CD-BA120/125 FL701 FL DISPLAY Q701 4948 47 59 58 57 55 54 53 52 51 44 43 42 44 SW701~SW703 SW709~SW721 VLOAD IC701 SW723~SW725 SYS. STOP IX0336AW AVDD SYSTEM MICROCOMPUTER JK901 15 16 17 20 21 22 9 10 11 12 13...
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Page 18: Schematic Diagram / Wiring Side Of P.w.board
CD-BA120/125 CD SERVO PWB-B Vref TIN1 FIN1 0.047 FIN2 TIN2 1.5M LA9235M SERVO AMP. 0.47/6.3 2.2/50 FIN1 100P ODRV FIN2 RFSW 120K 6.8K AGCON TIN1 (CH) 0.01 47/10 TIN2 100/10 REF1 0.01 0.0047 10/16 VREF 0.33 ODRV RFEV PH/BH 100K... - Page 19 CD-BA120/125 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 GENERAL INTERFACE 1.5M 100/10 PD02 SBCK 2.2/50...
- Page 20 CD-BA120/125 IC601 LC75341 AUDIO PROCESSOR R-CH A_GND P19 12 - D L-CH CNP11 C606 TO CD SERVO CD_GND 22/50 VREF INTERFACE C607 10/50 C608 10/50 C609 LOUT ROUT C610 R615 CNS601 BI601 3.9K C611 LBASS RBASS R601 R609 C612 C613 0.0027...
- Page 21 CD-BA120/125 MAIN PWB-A1(1/3) C604 100/25 C605 C606 0.022 22/50 C608 10/50 (D_GND) C610 R616 3.9K (A_GND) C612 A_10V C614 0.0027 C618 1/50 TO TUNER PWB P25 11 - H C630 1/50 TUN_R C624 TUN_L 1/50 C626 1/50 R618 C628 1/50...
- Page 22 CD-BA120/125 IC901 LA4282 POWER AMP. THERMAL OVER VOL. PROTECTOR RIPPLE MUTE FILTER CIRCUIT C918 220P C919 10/50 C911 0.022 C903 C917 C916 0.001 R911 0.047 0.047 (1/2W) C904 R910 R913 R912 0.001 (1/2W) Q902 KRC102 M R915 Q901 R914 KRC102 M...
- Page 23 CD-BA120/125 MAIN PWB-A1 (2/3) FM SIGNAL HEADPHONES PWB-A3 R916 R917 FW902 SO901 JK901 SPEAKER HEADPHONES TERMINAL CD-BA125 ONLY SP_Lch SP_Rch REAR C961 SPEAKER 22/50 – SP_Lch_GND – SP_Rch_GND C960 22/50 SP_Lch SP_Rch FRONT SPEAKER C946 – SP_Lch_GND 2200/35 – SP_Rch_GND...
- Page 24 CD-BA120/125 C302 0.001 C301 0.001 AM ANT. T303 C331 C330 C323 0.047 0.022 (UJ) C338 0.001 AM TRACKING fL C332 0.022 D301 C330 1SS133 C342 R365 0.022 D302 1SS133 R358 3.9K VD301 AM BAND SVC348S COVERAGE fL C335 560P T306...
- Page 25 CD-BA120/125 R363 R364 8.2K 8.2K C371 R361 1/50 R350 R362 2.7K C372 1/50 C367 1/50 20 19 18 15 14 IC303 LA1832S FM IF DET./FM MPX./AM IF C358 1/50 R352 R355 C357 3.3K 2.2/50 T351 C356 0.001 CF352 AM IF L352 100µH...
- Page 26 CD-BA120/125 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 R702 T-BIAS R703 T_T1/T2 R704 REC/PLAY R705 RES OUT...
- Page 27 CD-BA120/125 L701 SPLAY BI702 Q701 R779 KRC107M CD INT 3.3 (1/2W) CD INT WRQ(DSP) C707 R744 WRQ(DSP) 1/50 CD CE CD CE R745 CD DO CD DO CNP12 100K CD DI CD DI P19 12 - F CD CLK CD CLK...
- Page 28 CD-BA120/125 P33 8 - C TO POWER TRASFORMER CNS801 C943 SO801 R926 C944 AC INPUT SOCKET CNP801 C945 SO901 SPEAKER TERMINAL – R-CH R-CH REAR SPEAKER D915 – L-CH CD-BA125 ONLY C956 D916 L-CH D917 C961 C957 – R927 R-CH...
- Page 29 CD-BA120/125 IC904 IC902 Q903 IC901 2 3 4 5 6 7 8 9 10 11 12 B C E 1 2 3 1 2 3 D918 R925 R909 C918 C905 R906 C911 R924 C933 C943 C938 C934 R926 C917 C906...
- Page 30 CD-BA120/125 P32 5 - A TO CD SERVO PWB CNP12 CNS702 C717 FL701 BI702 C715 LED722 SW701 C713 C705 POWER D708 C716 R742 SW703 D709 TIMER/ SW702 R771 SLEEP CLOCK R735 IC701 C714 R734 Q702 3 2 1 R772 SW714...
- Page 31 CD-BA120/125 DISPLAY PWB-A2 Q701 RX701 FL701 REMOTE 1 2 3 SENSOR R745 C702 RD25 C719 RD10 SW711 X-BASS/ RD11 C707 DEMO R744 SW712 IC701 VOLUME R702 R703 R704 XL701 C703 C704 RD09 RD07 RD06 RD05 SW710 RD08 OPEN/CLOSE RD26 SW719...
- Page 32 CD-BA120/125 P29 9 - H P30 3 - 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 1 2 3 CNP4 CNP3 CNS3A...
- Page 33 CD-BA120/125 P31 10 - G TAPE MECHANISM TO DISPLAY PWB ASSEMBLY CNP702 FC702 TAPE MECHANISM PWB-D SOLM SOLM SOLENOIDE SOLENOIDE TAPE 2 TAPE 1 ERASE HEAD RECORD/PLAYBACK TAPE MOTOR PLAYBACK HEAD HEAD P29 12 - B TO MAIN PWB P28 4 - A...
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Page 34: Voltage
CD-BA120/125 VOLTAGE IC101 IC901 IC701 IC303 PIN VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE 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 4.81V 2.11V 1.6V 3.3V 4.69V 4.81V 1.6V... -
Page 35: Troubleshooting (Cd Section)
CD-BA120/125 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 36 CD-BA120/125 (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 37 CD-BA120/125 (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 37-1 appears and soon after Check the peripheral circuits at pins 18 and 19 on IC1, pin 23 on NO DISC appears.
- Page 38 CD-BA120/125 (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.
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Page 39: Function Table Of Ic
CD-BA120/125 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 VREF 21 FE- 20 FE LDOF 19 TE-... - Page 40 CD-BA120/125 IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (1/2) Terminal Name Input/Output Setting in Reset Function Pin No. PDO1 Output – For PULL Phase-comparison output terminal for built-in VOC control. PDO2 Output – Phase-comparison output terminal for built-in VOC control. Rough servo : OFF, phase servo : ON.
- Page 41 CD-BA120/125 IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (2/2) Terminal Name Input/Output Setting in Reset Function Pin No. LVDD – – L channel Power terminal for L channel. LCHO Output 1/2VDD D/A converter L channel output terminal. LVSS – – Ground terminal for L channel. Surely connected to 0V.
- Page 42 CD-BA120/125 IC701 RH-iX0336AWZZ: System Microcomputer (IX0336AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function — (+) POWER SUPPLY — — S-BUSY Output COMMIJNTCATE TO MPEG U–COM T–BTAS Output TAPE RECORD BIAS T–T1/T2 Output TAPE T1/T2 CHANGE REC/PLAY Output TAPE REC/PLAY CHANGE...
- Page 43 CD-BA120/125 IC701 RH-iX0336AWZZ: System Microcomputer (IX0336AW) (2/2) Pin No. Port Name Terminal Name Input/Output Function P120 PLAY SW_B Input PLAY SWITCH FOR T2 P119 Input TAPE2 A–SIDE FULL PROOF P118 Input TAPE2 B_SIDE FULL PROOF P117 MIC SW Input MIC SWITCH...
- Page 44 CD-BA120/125 IC601 VHiLC75341/-1: Audio Processor (LC75341) ROUT LOUT LBASS RBASS 0.1uF 0.1uF LTRE RTRE LSEL0 RSEL0 R1 R2 24 23 22 21 20 19 18 17 16 15 14 13 LC75341 10 11 12 Figure 44 BLOCK DIAGRAM OF IC...
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Page 45: Fl Display
CD-BA120/125 FL701 VVKSVA9MS13-1: FL Display h j k Figure 45 FL DISPLAY – 45 –... - Page 46 CD-BA120/125 — M E M O — – 46 –...
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Page 47: Parts Guide
CD-BA120/125 PARTS GUIDE CD-BA120 MODEL CD-BA120 Mini Component System consisting of CD-BA120 (main unit) and CP-BA120 (speaker system). CD-BA125 CD-BA125 Mini Component System consisting of CD-BA125 (main unit), CP-BA125 (Front speaker) and GBOXS0042AWM1 (rear spaeker). “HOW TO ORDER REPLACEMENT PARTS”... - Page 48 CD-BA120/125 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK CD-BA120/125 COILS INTEGRATED CIRCUITS AC 0.82 µH VP-XHR82K0000 AB 2.2 µH,Choke VP-XH2R2K0000 VHILA9235M/-1 AQ Servo Amp.,LA9235M AB 100 µH,Choke L103 VP-DH101K0000 VHILC78641E-1 AV Servo/Signal Control,LC78641E AB 330 µH,Choke L104...
- Page 49 CD-BA120/125 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PARTS CODE RANK RANK AC 220 µF,10V,Electrolytic AC 10 µF,16V,Electrolytic C138 VCEAZA1AW227M J C711,712 RC-EZD106AF1C AB 3.3 µF,50V,Electrolytic AB 0.1 µF,50V,Electrolytic C139 VCEAEA1HW335M J C713 VCEAZA1HW104M J AA 0.0082 µF,100V,Polypropylene AA 0.01 µF,16V...
- Page 50 CD-BA120/125 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R108,109 VRD-MN2BD332J AA 3.3 kohms,1/8W R724 VRD-ST2CD102J AA 1 kohm,1/6W R110 VRD-MN2BD473J AA 47 kohms,1/8W R725 VRD-MN2BD102J AA 1 kohm,1/8W R111,112 VRD-MN2BD472J AA 4.7 kohms,1/8W R726~729 VRD-ST2CD222J AA 2.2 kohms,1/6W...
- Page 51 CD-BA120/125 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PARTS CODE RANK RANK CNP101 QCNCM705AFZZ Plug,3Pin 201- 4 GCOVA1270AWSA J AH Cover,Cassette,Tape 1 CNP102 QCNCM707GAFZZ J Plug,7Pin 201- 5 GCOVA1271AWSA J AH Cover,Cassette,Tape 2 CNP301 92LCONE3P5268 AC Plug,3Pin 201- 6 HDECQ0541AWSA J...
- Page 52 CD-BA120/125 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK 92LPT0320201 AE Support,Stabilizer PWB-D ———— –– Tape Mechanism 92LPT0330301 AU Chassis,Loading PWB-E 92LPC99C017 CD Loading Motor (PWB Only) 92LPT0330803 AK CD,Chassis 92LPT0331003 AT Chassis,Slide OTHER SERVICE PART 92LSP0304303 Spring,Stopper...
- Page 53 CD-BA120/125 CD-BA120/125 306-2 306-1 306-3 703x4 305x2 PWB-C Figure 6 CD MECHANISM EXPLODED VIEW – 6 –...
- Page 54 CD-BA120/125 CD-BA120/125 BELT CONNECTION 617x9 FF/REW FF/REW ROLLER ROLLER ASS'Y ASS'Y 202-1 FLYWHEEL FLYWHEEL ASS'Y ASS'Y MAIN BELT TAPE2 TAPE1 PWB-A2 605x9 610x3 202-2 610x2 IC902 IC904 PWB-A3 Q905 610x2 IC901 201-11 Silicon 201-20 FL701 grease 271x2 201-25 201-12 614 x7...
- Page 55 CD-BA120/125 CD-BA120/125 604x2 604x2 MECHANISM 250x4 PWB-E 239x3 204-2 204-1 204-3 PWB-B Figure 8 CABINET EXPLODED VIEW (2/2) – 8 –...
- Page 56 CD-BA120/125 CP-BA120/125 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 (1/2) – 9 –...
- Page 57 CD-BA120/125 CD-BA125 ONLY GBOXS0042AWM1 WOOFER SP3(L-CH) SP4(R-CH) WOOFER SP3(L-CH) SP4(R-CH) SP3(L-CH) SP4(R-CH) WHITE BLACK 904x6 Figure 10 SPEAKER EXPLODED VIEW (2/2) – 10 –...
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Page 58: Packing Of The Set (For U.s.a. Only)
CD-BA120/125 PACKING OF THE SET (FOR U.S.A. ONLY) Setting position of switches and knobs Tape Mechanism STOP UNIT FRONT SPEAKER CP-BA120/125 SPAKP0013AWZZ1 Remote Control 92LV4974A Polyethylene Bag, Unit Polyethylene Bag SPAKA0242AWZZ Packing Add., Left/Right Bottom 92LN1885T Packing Add. TLABZ0712AWZZ Label, Feature Tape2 92LN1885B Packing Add. - Page 59 CD-BA120/125 –– MEMO –– – 12 –...
- Page 60 CD-BA120/125 © 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.