Sharp GX-CD1200W BK Service Manual

Sharp GX-CD1200W BK Service Manual

Portable cd stereo component system
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SPECIFICATIONS ............................................................................................................................................................... 1
VOLTAGE SELECTION ....................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................... 2
FITTING OF DIAL POINTER ............................................................................................................................................... 2
NAMES OF PARTS ............................................................................................................................................................. 3
DISASSEMBLY .................................................................................................................................................................... 4
REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 5
ADJUSTMENT ..................................................................................................................................................................... 6
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................... 10
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 18
TYPES OF TRANSISTOR AND LED................................................................................................................................. 18
VOLTAGE .......................................................................................................................................................................... 18
WAVEFORMS OF CD CIRCUIT ........................................................................................................................................ 19
TROUBLESHOOTING (CD SECTION) ............................................................................................................................. 20
FUNCTION......................................................................................................................................................................... 24
General
Power source:
AC 110-127 V/220-240 V, 50/60 Hz
DC 15 V ["D" size (UM/SUM-1, R20 or HP-
2) battery x 10]
Power consumption:
31 W
Output power:
PMPO; 200 W (Total)
(AC operation)
MPO; 50 W (25 W + 25 W)
(AC operation)
RMS; 25 W (12.5 W + 12.5 W)
(DC operation, 10 % T.H.D.)
Input terminal:
Mixing microphone(monaural); 600 ohms
Output terminal:
Headphones; 16-50 ohms
(recommended; 32 ohms)
Dimensions:
Width; 300 mm (11-13/16")
Height; 262 mm (9-1/2")
Depth; 220 mm (8-11/16")
Weight:
4.1 kg (9.1 lbs.) without batteries
Compact disc player
Type:
Compact disc
Signal readout:
Non-contact, 3-beam semi-conductor laser
pickup
Audio channels:
2
Filter:
8-times oversampling digital filter
D/A converter:
1-bit D/A converter
Wow and flutter:
Unmeasurable
(less than 0.001 % W. peak)
SERVICE MANUAL
MODEL
CONTENTS

SPECIFICATIONS

SHARP CORPORATION

- 1 -
PORTABLE CD STEREO
COMPONENT SYSTEM
GX-CD1200W(BK)
GX-CD1200W(GL)
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
Radio section
Frequency range:
FM; 88 - 108 MHz
SW1; 2.3 - 7.3 MHz
SW2; 7.3 - 22 MHz
MW; 526.5 - 1,606.5 kHz
Tape recorder section
Frequency response:
60 - 12,000 Hz (Normal tape)
Signal/noise ratio:
40 dB (TAPE 1, recording/playback)
55 dB (TAPE 2, playback)
Wow and flutter:
0.15 % (WRMS)
Motor:
DC 9 V electric governor
Bias system:
AC bias
Erase system:
Magnet erase
Speaker section
Type:
2-way type
Speakers:
12 cm (4-3/4") free-edge speaker x 2
Tweeter x 2
Maximum input power: 25 W
Rated input power:
12.5 W
Impedance:
8 ohms
Dimensions:
Width; 235 mm (9-1/4")
Height; 262 mm (10-5/16")
Depth; 220 mm (8-11/16")
Weight:
1.8 kg (4.0 lbs.)/each
Specifications for this model are subject to change without
prior notice.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
GX-CD1200W
No. S5039GXCD1200
Page

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Summary of Contents for Sharp GX-CD1200W BK

  • Page 1: Table Of Contents

    Specifications for this model are subject to change without (less than 0.001 % W. peak) prior notice. This document has been published to be used SHARP CORPORATION for after sales service only. The contents are subject to change without notice. – 1 –...
  • Page 2: Voltage Selection

    GX-CD1200W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. VOLTAGE SELECTION Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage as follows: Slide the voltage selector with a screwdriver to the appropriate voltage number (AC 110V-127V or AC 220V-240V).
  • Page 3: Names Of Parts

    GX-CD1200W NAMES OF PARTS 1. CD Compartment 2. CD Eject Button (Continued) 3. Track Number Indicator 4. (CD) Play Indicator 5. (CD) Pause Indicator 6. Extra Bass Control 7. Graphic Equalizer Controls 8. Power/(TAPE 2) Play Direction Indicators 9. (CD) Track Down/Review Button 10.
  • Page 4: Disassembly

    GX-CD1200W DISASSEMBLY Caution on Disassembly Follow the below-mentioned notes when disassembling CD Player Unit the unit and reassembling it, to keep it safe and ensure Front Cabinet excellent performance: 1. Take cassette tape out of the unit. 2. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit and remove the batteries from the unit.
  • Page 5: Removing And Reinstalling The Main Parts

    GX-CD1200W Front Panel (F1)x3 Tweeter (H2)x1 ø3x10mm CD Servo (G1)x3 ø3x10mm Speaker Cord Woofer (F2)x2 Speaker Holder Cord Driver (F2)x1 CD Mechanism (F1)x1 ø3x10mm (H3)x4 ø3x10mm Switch PWB Main Unit CD Player Unit Speaker Release (H1)x5 Lever (F1)x3 ø4x16mm Speaker Box CD Control PWB ø3x10mm Figure 5-2...
  • Page 6 GX-CD1200W TAPE MECHANISM SECTION Perform steps 1, 2, 3 and 4 of the disassembly method to (A1) x1 TAPE 1 ø2x7mm remove the mechanism block. (A1) x1 Hook ø2x3mm (A2) x2 How to remove the record / playback, playback Record/Playback Head and erase heads (See Figs.
  • Page 7: Adjustment

    GX-CD1200W ADJUSTMENT MECHANISM SECTION TUNER SECTION • Driving Force Check fL: Low-range frequency fH: High-range frequency Torque Meter Specified Value • FM IF/RF Play: TW-2412 Tape 1: Over 60 g Tape 2: Over 50 g Specified Value/ Instrument Test Stage Adjusting Connection Point...
  • Page 8 GX-CD1200W SW103 SW401 FM TRACKING TRACKING fH SW1 BAND TRACKING fH COVERAGE MW BAND COVERAGE fH FM BAND SW2 BAND COVERAGE COVERAGE MW BAND COVERAGE fL TRACKING fL TRACKING FM IF AM IF TRACKING fL TRACKING fL FM DETECTION MAIN PWB MAIN PWB CNP103 IC502...
  • Page 9: Test Mode

    GX-CD1200W CD SECTION Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary to reajust it. Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted. TEST MODE Start While holding down the "PLAY"...
  • Page 10: Schematic Diagram / Wiring Side Of P.w.board

    GX-CD1200W RECORD SIGNAL FM SIGNAL PLAYBACK SIGNAL TRACKING MW/SW1 SIGNAL SW103-B TA7358AP FM MODE FM FRONT END FM BAND PASS 6.4V 330K 820K FILTER RF AMP Q181 0.9V FM STEREO FM MONO 0.022 1 2 3 220/10 KTC3199 G 0.022 3P(CH) ROD ANTENNA(253) GRAPHIC...
  • Page 11 GX-CD1200W SW2 BAND MW BAND FM BAND SW1 BAND TRACKING TRACKING COVERAGE COVERAGE COVERAGE COVERAGE TRACKING GRAPHIC EQUALIZER PWB-A2 IC202 LB1403N LEVER METER DRIVER C251 R251 1/50 6.8K Q181 KTC3199 GR C257 GRAPHIC 47/25 EQUALIZER R255 R183 C253 330K GRAPHIC C259 0.022 X-BASS...
  • Page 12 GX-CD1200W FW802 ( ):STOP SW810 OPEN/CLOSE IC801 R802 2.2K Q801 TA2109F SERVO PRE AMP. SWITCH PWB-C3 KTA1266 GR SWITCHING 4.3V(5V) 0.2V(1.5V) R801 C825 47/10 C815 C816 C817 C802 47/10 0.022 100/10 3.6V R804 0.022 (4.4V) 2.1V R896 R805 IC801 R895 R806 1.6V R893...
  • Page 13 GX-CD1200W C825 47/10 C826 C823 R824 0.022 R820 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. L803 R826 2.1V 10µH 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 220K C827 R827...
  • Page 14 GX-CD1200W TO CD SERVO PWB CNP501 P17 12-D SPEAKER CNP804 MAIN PWB-A1 TERMINALS SW102 BEAT CANCEL C B A CNS804 2 3 4 5 L301 BI804 C601 CK129 DZ601 R602 R601 VR102 R352 R516 R351 R515 IC502 Q603 R111 E C B C127 Q404 Q403 R428...
  • Page 15: Graphic Equalizer

    GX-CD1200W W102 AT CANCEL C B A ROD ANTENNA SPRING (249) COLOR TABLE BROWN L301 RD(R) ANTENNA (253) ORANGE YELLOW GREEN BLUE R352 R354 VIOLET R351 R353 GRAY WH(W) WHITE BLACK PINK 1 2 3 3 2 1 L3,4 MW/SW1 BAR ANTENNA R135 R107...
  • Page 16 GX-CD1200W SO601 AC SOCKET AC110V-127V/ TERMINAL A AC220V-240V, 50/60Hz PWB-A5 SW601 (251) VOLTAGE SELECTOR AC220V-240V AC110V-127V (250) BATTERYS DC15V ["D" SIZE (UM / SUM-1, R20 or HP2) battery x 10] (251) TERMINAL B PWB-A6 T601 POWER TRANSFORMER (237) COLOR TABLE CNS601 BROWN TO MAIN PWB...
  • Page 17 GX-CD1200W CD CONTROL PWB-C2 R847 R848 SW802 SW804 STOP REVIEW/ TRACK DOWN SW801 SW803 FW801 LCD801 PLAY/ CUE/ PAUSE TRACK UP SWITCH PWB-C3 CD SERVO PWB-C1 14 15 C851 L802 SW810 C853 C849 OPEN/CLOSE Q803 R857 L803 R822 R858 FW801 C847 R835 C850...
  • Page 18: Notes On Schematic Diagram

    GX-CD1200W NOTES ON SCHEMATIC DIAGRAM • Resistor: To differentiate the units of resistors, The symbol as K and REF. NO. DESCRIPTION POSITION M are used: the symbol K means 1000 ohm and the symbol BAND SELECTOR M means 1000 kohm and the resistor without any symbol is an ohm resistor.
  • Page 19: Waveforms Of Cd Circuit

    GX-CD1200W WAVEFORMS OF CD CIRCUIT NO DISC FOCUS SEARCH STOP PLAY TMAX IC802 66pin IC802 50pin SBOK IC803 20pin IC802 45pin IC802 72pin IC803 21pin FOCUS SEARCH TOC IL STOP PLAY IC802 74pin IC802 64pin IC802 62pin IC802 67pin IC802 64pin IC802 71pin STOP PLAY...
  • Page 20: Troubleshooting (Cd Section)

    GX-CD1200W TROUBLESHOOTING (CD SECTION) 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 21 GX-CD1200W • Laser failure. Is +7.5V applied to the emiter of Q802 ? Check the PWB pattern of Q603. Check the peripheral parts of IC803 and Q802. Is +5V applied to the collector of Q802 ? Check the PWB pattern between collector of Q204 and pin 75 of Is +5V applied to the pin 75 (VDD) of IC802 ? IC802.
  • Page 22 GX-CD1200W • Focus servo sawtooth wave failure. IC802 is faulty. Is sawtooh wave output to the pin 66 (FOO) of IC802 ? 1.5~2.5sec Check the PWB pattern of IC803. Is +8.1V applied to the pins 1 and 30 (VCC) of IC803 ? Check the PWB pattern of IC803.
  • Page 23 GX-CD1200W • Track search failure Does the sled motor run in FF/REW state when the CD Check as stated in item "SLED MOTOR OPERATION FAILURE". TEST MODE is set? Is the following wave output to the pin 67 (TRO) of IC802 IC802 failure.
  • Page 24: Function

    GX-CD1200W FUNCTION TABLE OF IC IC802 VHiTC9457F0-1: Servo/Signal Control (TC9457F0) (1/4) Pin No. Port Name Terminal Name Input/Output Function (OT5)S1 SEG1 Output Segment signal output to the LCD panel. (OT6)S2 SEG2 Output Up to 72 segments in a matrix with COM1 to COM4 can be displayed. (OT7)S3 SEG3 Output...
  • Page 25 GX-CD1200W IC802 VHiTC9457F0-1: Servo/Signal Control (TC9457F0) (2/4) Pin No. Port Name Terminal Name Input/Output Function (S12)P4-1 PUSEL2 Input 3-bit CMOS I/O ports. (SO/S11/ Input/Output These ports can be set for input or output bit for bit by a program. SDA)P4-2 These pins serve dual purposes as input or output pins for the serial (SCK/SCL) Input/Output...
  • Page 26 GX-CD1200W IC802 VHiTC9457F0-1: Servo/Signal Control (TC9457F0) (3/4) Pin No. Port Name Terminal Name Input/Output Function SBAD SBAD Input/Output Subbeam add signal input pin. Input/Output Tracking error input pin. This input is read when tracking servo is on. TEZI TEZI Input/Output Tracking error zero-cross input pin.
  • Page 27 GX-CD1200W IC802 VHiTC9457F0-1: Servo/Signal Control (TC9457F0) (4/4) Pin No. Port Name Terminal Name Input/Output Function /HOLD HOLD Input This pin is used to input a signal that requests or clears the hold mode. Normally, use this pin for CD mode select signal input or battery detection signal input.
  • Page 28 GX-CD1200W — M E M O — – 28 –...
  • Page 29: Parts Guide

    “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. 1. MODEL NUMBER 2. REF. No. 3. PART NO. 4. DESCRIPTION For location of SHARP Parts Distributor, Please call Toll-Free;...
  • Page 30 GX-CD1200W PRICE PRICE DESCRIPTION PARTS CODE PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS VR202 RVR-Q0002BGZZ AE 50 kohms (B)×2 [X-BASS] VR203~205 RVR-Q0001BGZZ AC 100 kohm (B)×2 [Graphic Equalizer] VHITA7358AP-1 AG FM Front End,TA7358AP VHILA1805//-1 AM FM/AM IF MPX.,LA1805 VR401 RVR-B0002BGZZ 50 kohms (B)×2 [VOLUME] IC101 VHITA8189N/-1...
  • Page 31 GX-CD1200W PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PARTS CODE RANK RANK AB 1 µF,50V,Electrolytic AB 2.2 µF,50V,Electrolytic C203,204 RC-GZA105AF1H C846 RC-GZA225AF1H AA 0.01 µF,50V,Mylar AB 22 µF,16V,Electrolytic C205,206 VCQYKA1HM103K J C847 RC-GZA226AF1C AB 22 µF,16V,Electrolytic C207,208 VCKYPA1HB471K AA 470 pF,50V C848 RC-GZA226AF1C AC 0.082 µF,50V,Mylar...
  • Page 32 AK Cassette Holder [Tape 2] [BK] [From Serial No.00504991] GFTAC0002BGSC J Cassette Holder [Tape 2] [GL] BI803/CNS803 QCNWN0028BGZZ J Connector Ass’y,6/6Pin HBDGA1003BGSA J Badge,SHARP BI804/CNS804 QCNWN0031BGZZ J Connector Ass’y,6/6Pin HBDGS1001BGSA J AF Sheet,Surround Sound System CNP101 QCNCM705CAFZZ J AA Plug,3Pin...
  • Page 33 GX-CD1200W PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK HDECQ0008BGSA J AD Panel,Cassette Holder [Tape 2] TSPC-0026BGZZ Label,Specifications [BK] HDECZ0001BGSA J AC Panel,Dial Pointer [For Malaysia/Asia Middle East/ HSSND0001BGSA J AC Dial Pointer Africa] JKNBQ0001BGSC Knob,Tuning TSPC-0027BGZZ Label,Specifications [BK] LANGT0001BGFW J AD Bracket,Front Cabinet [For Jordan/Egypt]...
  • Page 34 GX-CD1200W PRICE PRICE DESCRIPTION PARTS CODE PARTS CODE DESCRIPTION RANK RANK ACCESSORIES/PACKING PARTS QACCA0001SJ00 AS AC Power Supply Cord QACCE0007AW00 J AH AC Power Supply Cord QACCL0002AW00 AN AC Power Supply Cord QPLGA0250AFZZ AF Adaptor,AC Plug QPLGA0253AFZZ AE Adaptor,AC Plug SPAKA0003BGZZ Packing Add.,Unit SPAKC0023BGZZ...
  • Page 35 GX-CD1200W 703x2 M802 M801 305x2 SW702 PWB-B Figure 6 CD MECHANISM EXPLODED VIEW – 6 –...
  • Page 36 GX-CD1200W MECHANISM 610x2 608x3 PWB-C2 613x3 612x3 601x3 PWB-C3 LCD801 SW601 PWB-C1 601x3 SO601 607x3 T601 PWB-A6 246x2 607x2 601x2 PWB-A7 PWB-A5 601x2 605x5 PWB-A2 Silicon Grease MIC151 601x2 PWB-A8 Silicon Grease VR401 PWB-A3 PWB-A1 IC502 602x2 601x2 IC402 Q601 602x2 214x2 605x6...
  • Page 37 GX-CD1200W 702x5 303(LEFT) 304(RIGHT) 301(LEFT) 302(RIGHT) SP403(L-CH) SP404(R-CH) 701x4 SP401(L-CH) SP402(R-CH) TWEETER SP403(L-CH) SP404(R-CH) BLACK BLACK TWEETER SP403(L-CH) SP404(R-CH) WOOFER SP401(L-CH) SP402(R-CH) WOOFER SP401(L-CH) SP402(R-CH) Figure 8 SPEAKER EXPLODED VIEW – 8 –...
  • Page 38 GX-CD1200W — M E M O — – 9 –...
  • Page 39 GX-CD1200W — M E M O — – 10...
  • Page 40 GX-CD1200W © 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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