Table of Contents
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Illustration: CD-C422/C422C
Illustration: CD-C2800/C2800C
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
TROUBLESHOOTING (CD CHANGER CONTROL / CD SECTION) ............................................................................. 32
FUNCTION TABLE OF IC .............................................................................................................................................. 36
FL DISPLAY .................................................................................................................................................................... 42
REPLACEMENT PARTS LIST/EXPLODED VIEW
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
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CD-C422/C422C/C2800/C2800C
CD-C422/C422C
CP-C422, REAR SPEAKER SYSTEM,
Constitute CD-C422/C422C.
CD-C2800/C2800C
CP-C2800, REAR SPEAKER SYSTEM,
Constitute CD-C2800/C2800C.
• 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.
No. S3820CDC422//
Page
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Table of Contents
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Summary of Contents for Sharp CD-C422
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Page 1: Table Of Contents
CD-C422/C422C/C2800/C2800C SERVICE MANUAL No. S3820CDC422// CD-C422/C422C CP-C422, REAR SPEAKER SYSTEM, Constitute CD-C422/C422C. CD-C2800/C2800C CP-C2800, REAR SPEAKER SYSTEM, Constitute CD-C2800/C2800C. • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. -
Page 2: Important Service Notes (For U.s.a.only)
CD-C422/C422C/C2800/C2800C 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-C422/C422C/C2800/C2800C NAMES OF PARTS CD-C422/C422C/ C2800/C2800C Front Panel 1. Disc Tray 2. Disc Skip Button 3. Open/Close Button: 4. Disc Number Indicator 5. Timer Indicator 6. Record Indicator 7. Sleep Indicator 5 6 7 8 8. Extra Bass Indicator: X-BASS 9. -
Page 4: 6. Super Tweeter
CD-C422/C422C/C2800/C2800C Speaker Section CP-C422 Front Speaker CP-C422 1. Super Tweeter 2. Woofer 3. Bass Reflex Duct 4. Speaker Wire CP-C2800 5. Tweeter 6. Super Tweeter 7. Woofer 8. Bass Reflex Ducts 9. Speaker Wire CP-C2800 Rear Speaker REAR SPEAKER SYSTEM 10. -
Page 5: Operation Manual
CD-C422/C422C/C2800/C2800C OPERATION MANUAL – 5 –... -
Page 6: Quick Guide
CD-C422/C422C/C2800/C2800C – 6 –... -
Page 7: Disassembly
CD-C422/C422C/C2800/C2800C DISASSEMBLY CD-C422/C422C/ Caution on Disassembly C2800/C2800C Follow the below-mentioned notes when disassembling the unit and reassembling it, to keep it safe and ensure Top Cabinet excellent performance: ( A1 ) x2 1. Take cassette tape and compact disc out of the unit. - Page 8 CD-C422/C422C/C2800/C2800C ( H1 ) x1 Switch PWB ø3 x10mm ( E1 ) x2 ø3 x10mm Front Panel ( H2 ) x1 ( E1 ) x3 ø3 x10mm Washer Display Turntable ( E1 ) x1 ø3 x 8mm ( E2 ) x1 ø3 x10mm...
- Page 9 CD-C422/C422C/C2800/C2800C CP-C422 CP-C422 STEP REMOVAL PROCEDURE FIGURE Front Speaker 1. Net ......(A1) x1 ( A1 ) x1 2. Duct Panel ..... (A2) x1 3. Screw ..... (A3) x4 ( A3 ) x4 ø3 x34mm Woofer ( A2 ) x1...
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Page 10: Removing And Reinstalling The Main Parts
CD-C422/C422C/C2800/C2800C REMOVING AND REINSTALLING THE MAIN PARTS CD MECHANISM SECTION Perform steps 1, 2, 3, 13 and 14 of the disassembly method to remove the CD mechanism. Loading Up / Down Motor How to remove the loading motor (See Fig. 10-1) Motor 1. -
Page 11: Adjustment
CD-C422/C422C/C2800/C2800C ADJUSTMENT • FM RF MECHANISM SECTION • Driving Force Check Signal generator: 1 kHz, 75 kHz dev., FM modulated Frequency Frequency Serring/ Instrument Test Stage Torque Meter Specified Value Display Adjusting Connection Play: TW-2412 Tape 1: Over 80 g... -
Page 12: Test Mode
CD-C422/C422C/C2800/C2800C TEST MODE • Setting the test mode Any one of test mode can be set by pressing several keys as follows. <REC. PAUSE> + <DISC. SKIP> + <POWER> TEST: CD operation test • TEST mode Function — CD test mode Setting of TEST mode Indication of CD TST mode (Fig. -
Page 13: Notes On Schematic Diagram
CD-C422/C422C/C2800/C2800C 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-C422/C422C/C2800/C2800C WAVEFORMS OF CD CIRCUIT STOP PLAY FOCUS SERCH 0.5ms 0.50 V 10.0 V IC1 20 F.E IC1 33 JP+ 0.5ms 10.0 V IC1 32 JP- 0.5ms 5.0 V 0.50 V IC1 54 DRF IC1 14 JP 0.5ms 1.00 V... -
Page 15: Block Diagram
CD-C422/C422C/C2800/C2800C Figure 15 BLOCK DIAGRAM (1/3) – 15 –... - Page 16 CD-C422/C422C/C2800/C2800C FM&AM LOOP ANT FM IF FM BPF IC301 VR381 FM FRONT END MPX VCO ADJ AM IF L301 T302 CF301 TA7358AP MONO T382 T381 FM IF IN FM DET AM IF FM DET MO/ST FM/AM IF MPX.IF AM MIX...
- Page 17 CD-C422/C422C/C2800/C2800C UNSWITCH FL701 DISPLAY MEMORY BACK UP MONO/ST 31 32 TO CD SECTION TO CD SECTION Q701 TO POWER SECTION PHM1 FM/AM ITCHING Q381 SW723 SW701 SW724 AVDD SW719 IC701 AVREF IX0191AW XL702 SYSTEM CONTROL 4.19MHz MICROCOMPUTER TO CD SECTION...
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Page 18: Schematic Diagram / Wiring Side Of P.w.board
CD-C422/C422C/C2800/C2800C HEADPHONE PWB-A4 JK961 HEADPHONES POWER PWB P20 1-B CNS901 LUG961 LUG962 IC961 IC942 IC941 C968 C974 SO961 SPEAKER TERMINAL C963 C973 Q514 Q511 CNP502 C980 C504 RIGHT C564 R972 C513 FRONT R563 C975 SPEAKERS R973 CNS902 R502 C514 5.4OHMS MIN. - Page 19 CD-C422/C422C/C2800/C2800C R712 R711 SWITCH PWB-A3 DISPLAY PWB-A2 SW702 SW704 VOLUME DOWN VOLUME UP SW703 X-BASS EQUALIZER R576 R785 R782 R541 SW724 OPEN/CLOSE SW710 R787 TUNING UP C720 C512 C581 /TIME R814 RX701 Q514 CNS502 R581 C719 R801 R761 CNP502 C711...
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Page 20: Tape Mechanism
CD-C422/C422C/C2800/C2800C POWER PWB-B F901: CANADA ONLY(CD-C422C/CD-C2800C) JUMPER: USA ONLY(CD-C422/CD-C2800) PT901 POWER TRANSFORMER D903 D901 CNS901 MAIN PWB D905 P18 5-B D907 CNP901 C910 TF901 ZD901 S0901 AC POWER R905 INPUT SOCKET AC 120V/60Hz R904 TO DISPLAY PWB CNSM1 SWM3 F. P. - Page 21 CD-C422/C422C/C2800/C2800C WB-B PICKUP UNIT(306) AC POWER CORD AC INPUT CNS1A CNS1B TO MAIN PWB P18 4-H CNP1 0901 OWER SOCKET 0V/60Hz TO MAIN PWB P18 6-H CNP2 CNS2A CNS2B CNS5 MECHA UP DISC NUMBER SENSOR PWB-D OPEN/CLOSE T/T UP/DOWN LOADING...
- Page 22 CD-C422/C422C/C2800/C2800C FL701 DISPLAY 3 4 5 6 7 8 9 13 14 15 16 17 18 19 22 23 24 25 26 27 28 29 32 33 Q701 KRC107 M R707 100K 1 2 3 4 5 6 7 8 9...
- Page 23 CD-C422/C422C/C2800/C2800C DISPLAY PWB-A2 R710 R711 R712 1.2K 1.8K R702 SW701 SW702 SW703 SW704 RANDOM VOLUME X-BASS/ VOLUME /MEMO DOWN EQUALIZER C702 220/6.3 R718 R719 R720 R721 R722 R723 1.2K 1.8K 2.2K 3.9K 5.6K SW711 SW710 TUNING SW705 SW706 SW707 SW708...
- Page 24 CD-C422/C422C/C2800/C2800C R1 1K 0.01 KTA1266 GR 47/16 1/50 0.01 – FIN2 – – FIN1 EFBAL – – – FOSTA – DGND TOSTA – 2FREQ 0.1/50 – LASER – 0.033 TE– – FSTA 100K LA9241M 8/12CM 0.001 SERVO AMP. SLOF –...
- Page 25 CD-C422/C422C/C2800/C2800C MAIN PWB-A1(1/4) CD SIGNAL LC78623D SERVO/SIGNAL 0.01 CONTROL EFLG 16.93MHz U-COM SBSY SUB-CODE INTERFACE DEF1 XVSS 3.3M 0.033 X-TAL XOUT GENERATOR 2KX8 0.047 VVSS XVDD ISET MUTER RVDD 0.047 VCO CLOCK ERROR COERECT 2.7K CD_R RCHO OSC CONTROL FLAG CONTROL...
- Page 26 CD-C422/C422C/C2800/C2800C CD_R R418 TO MAIN PWB(1/4) P25 12-C A_GND C402 0.047 R402 (ML) CD_L 38 39 C442 C404 R404 0.0027 C448 0.047 R420 22/16 100K (ML) RVref C406 C444 RINVIN2 0.047 100P R406 C453 RTOUT (ML) C446 0.022 RVRIN 10/16...
- Page 27 CD-C422/C422C/C2800/C2800C C453 0.022 C452 1/50 C450 100/16 D401 TO MAIN 1SS133 +12V(AUDIO) PWB(3/4) P28 1-E C451 R432 1/50 4.7K MAIN_R TO MAIN A_GND PWB(3/4) P28 1-B MAIN_L C454 R431 2.2/50 4.7K R421 UT_L EC_R TUN_R R577 100K TUN_L TO MAIN...
- Page 28 CD-C422/C422C/C2800/C2800C MAIN PWB-A1(3/4) – IC961 LA4450 – POWER AMP. FM SIGNAL C975 1000/25 C963 1/50 MAIN_L TO MAIN PWB(2/4) A_GND C976 P27 12-C 1000/25 MAIN_R C964 1/50 (1/2W R973 C979 (1/2W) 0.047 (ML) CNS702 +12V DISPLAY PWB (MECHA) P22 1-F...
- Page 29 CD-C422/C422C/C2800/C2800C HEADPHONE PWB-A4 JK961 HEADPHONES R982 R981 R975 330 (1/2W) 330 (1/2W) (1/2W) C979 0.047 (ML) SO961 SPEAKER TERMINAL L-CH – TO FRONT SPEAKER MIN 5.4 OHMS – R-CH L-CH C992 – TO REAR PEAKER 22/50 MIN 16 OHMS –...
- Page 30 CD-C422/C422C/C2800/C2800C • NOTES ON SCHEMATIC DIAGRAM can be found on page 13. Figure 30 SCHEMATIC DIAGRAM (9/10) – 30 –...
- Page 31 CD-C422/C422C/C2800/C2800C IC501 IC303 IC401 IC701 NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE 2V(2V) –24.7V 0.41V 2V(2V) –24.7V 2.1V –24.7V 0.6V 7.2V(8.2V) 2.1V 0.5V(0.8V) –24.7V 4.4V 1.8V 2V(2V) –24.7V 2.2V –24.7V 1.3V 0V(0V) 4.4V...
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Page 32: Troubleshooting (Cd Changer Control / Cd Section)
CD-C422/C422C/C2800/C2800C 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 33 CD-C422/C422C/C2800/C2800C • When the CD tray fails to open or close. Check the OPEN CLOSE SW and the wiring from the IC701 Is there following voltage input in specific state of IC701 pin 19? pin 19 to the OPEN CLOSE SW.
- Page 34 CD-C422/C422C/C2800/C2800C • Playback can only be performed when a disc is loaded. Check the laser diode driver. Is the Focus servo active? (Can you hear it working?) Check the area around IC1(16) - (21) (focus servo circuit). Does the DRF signal change from "L" to "H"? If the disc is not turning, the DRF Check the spin system.
- Page 35 CD-C422/C422C/C2800/C2800C • Checking the spin system. Play operation is performed without disc. The turntable rotates a little. The spin driver circuit is normal. Check the periphery of IC1 pins 23 to 27, pin 39, and pin 40, IC2 The turntable fails to rotate or rotates at high speed.
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Page 36: Function Table Of Ic
CD-C422/C422C/C2800/C2800C FUNCTION TABLE OF IC IC2 VHiLC78623D-1:Servo/Signal Control(LC78623D) (1/2) Terminal Name Input/Output Function Pin No. DEFI Input Input terminal of defect detection signal (DEF). (Connected to OV when not used.) Input For PLL Input terminal for test. Pull-down resistor is integrated. Surely connected to 0V. - Page 37 CD-C422/C422C/C2800/C2800C IC2 VHiLC78623D-1:Servo/Signal Control(LC78623D) (2/2) Terminal Name Input/Output Pin No. Function Output Output terminal of subcodes P, A, R, S, T, U and W. SFSY Output Output terminal of synchronous signal of subcode frame. It drops when subcode stands by.
- Page 38 CD-C422/C422C/C2800/C2800C IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (1/2) Function Port Name Pin No. FIN2 Connection pin for photodiode of pickup. RF signal is generated through addition with FIN pin, and FE signal is generated through subtraction. FIN1 Connection pin for photodiode of pickup.
- Page 39 CD-C422/C422C/C2800/C2800C IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (2/2) Function Port Name Pin No. Micro computer command clock input pin. Micro computer command data input pin. Micro computer command chip enable input pin. (DETECT RF) RF level detection output. (Focus Serch Select) Pin to switch focus search mode. (± search/+ search for reference voltage) VCC2 VCC pin for servo system and digital system.
- Page 40 CD-C422/C422C/C2800/C2800C IC701 RH-iX0191AWZZ:System Microcomputer (IX0191AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function FIP6-0 FL DRIVER Output Segment Output — Connect with BACK UP VDD TAPE BIAS Output TAPE BIAS ON: H TAPE REC Output TAPE REC. ON:L T1/T2...
- Page 41 CD-C422/C422C/C2800/C2800C IC701 RH-iX0191AWZZ:System Microcomputer (IX0191AW) (2/2) Function Pin No. Port Name Terminal Name Input/Output P124 TAPE1 RUN PULSE Input TAPE1 Run pluse P123 TAPE MECHA STOP Input Tape mecha up state: L 58-60* P122-P120 DISC1-DISC3 Output LED drive output 61-70...
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Page 42: Fl Display
CD-C422/C422C/C2800/C2800C IC5 VHiM56748FP-1: Focus/Tracking/Spin/Slide Driver (M56748FP) Vref-in Stand Vref-in Standby Vref-out SS.GND Vref-out Standby Gain1 Gain4 Gain1 Gain4 Vctl1(–) Vctl4(–) VM1(–) VM4(–) VM1(–) VM4(–) VM1(+) VM4(+) VM1(+) VM4(+) VM2(+) VM3(+) VM2(+) VM3(+) VM2(–) VM3(–) VM2(–) VM3(–) Vctl2(–) Vctl3(out) Vctl3(out) Gain2 Vctl3(–) -
Page 43: 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 44 CD-C422/C422C/C2800/C2800C PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS L301 RCILF0001AWZZ AC Band Pass Filter L312 RCILR0029AWZZ AA FM RF VHILA9241M/-1 AS Servo Amp.,LA9241M L317 VP-DH101K0000 AB 100 µH,Choke VHILC78623D-1 AY Servo/Signal Control,LC78623D L501 VP-MK331K0000 AB 330 µH,Choke...
- Page 45 CD-C422/C422C/C2800/C2800C PRICE PRICE DESCRIPTION DESCRIPTION PART CODE PARTS CODE RANK RANK C318 VCKYMN1HB101K J AA 100 pF,50V C716 VCEAZA1CW476M J AB 47 µF,16V,Electrolytic C319 VCKYMN1HB102K J AA 0.001 µF,50V C717 VCTYMN1EF223Z AA 0.022 µF,25V C718 VCEAZA0JW227M J AC 220 µF,6.3V,Electrolytic...
- Page 46 CD-C422/C422C/C2800/C2800C PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R77~79 VRD-MN2BD102J AA 1 kohm,1/8W R577,578 VRD-ST2CD104J AA 100 kohm,1/6W VRD-MN2BD101J AA 100 ohm,1/8W R581~583 VRD-MN2BD103J AA 10 kohm,1/8W R86~88 VRD-MN2BD102J AA 1 kohm,1/8W R584 VRD-ST2CD103J AA 10 kohm,1/6W VRD-MN2BD222J AA 2.2 kohms,1/8W...
- Page 47 AD Switch,Push Type 92LN-BAND1318A J AA Nylon Band,80mm [DISC Number] GCAB-1044AWSA AM Cabinet,CD Player Base QSW-F9001AW01 AD Switch,Leaf Type [Pickup In] GCAB-1050AWSA AP Top Cabinet [CD-C422/C422C] SW701 92LSWITCH1401A J Switch,Key Type GCAB-1050AWSB AS Top Cabinet [RANDOM/DEMO] [CD-C2800/C2800C] SW702 92LSWITCH1401A J...
- Page 48 AF Panel,Cassette,Tape 2 92L316-0022 Duct Panel HDECQ0299AWSA J AG CD Top Panel SP1,2 VSP0013PB246A BA Speaker,Woofer HDECQ0335AWSA J AK Display Panel [CD-C422/C422C] SPEAKER BOX PARTS Front Speaker CP-C2800 HDECQ0359AWSA J Display Panel [CD-C2800/C2800C] JKNBZ0516AWSA AF Button Function 999723001005 Speaker Box Ass’y...
- Page 49 CD-C422/C422C/C2800/C2800C CD-C422/C422C/ C2800/C2800C 306-2 306-1 306-3 305x2 PWB-E Figure 6 CD MECHANISM EXPLODED VIEW – 7 – – 6 –...
- Page 50 CD-C422/C422C/C2800/C2800C CD-C422/C422C/ C2800/C2800C 615x4 611x2 613x3 PWB-A1 PWB-A2 614x2 PWB-A3 258x2 613x2 (LUG962) Silicon FL701 Grease PWB-A4 616x2 201-1 616x2 201-2 613x6 TAPE MECHANISM 610x4 (203-1,203-2, 203-3,203-4, 203-5,203-6, 203-7,203-8) PWB-B For Canada Only 608x2 Figure 7 CABINET EXPLODED VIEW (1/2) –...
- Page 51 CD-C422/C422C/C2800/C2800C CD-C422/C422C/ C2800/C2800C 202-3 202-2 612x2 202-1 612x2 253x2 MECHANISM 606x2 609x4 PWB-E SOLM2 Figure 8 CABINET EXPLODED VIEW (2/2) – 8 – – 9 –...
- Page 52 CD-C422/C422C/C2800/C2800C CP-C422 SP3 (L-CH) SP4 (R-CH) SP1 (L-CH) SP2 (R-CH) SP1,2 904x4 SP3 (L-CH) SP4 (R-CH) SP1 (L-CH) SP2 (R-CH) Figure 9 SPEAKER EXPLODED VIEW (1/3) – 10 – – 9 –...
- Page 53 CD-C422/C422C/C2800/C2800C CP-C2800 SP3,4 904x4 904x4 SP1,2 TWEETER SP3 (L-CH) SP4 (R-CH) SUPER TWEETER SP5 (L-CH) SP6 (R-CH) SUPER YELLOW TWEETER SP5 (L-CH) SP6 (R-CH) Capacitor BLACK TWEETER BLACK SP3 (L-CH) SP4 (R-CH) Capacitor WOOFER WOOFER SP1 (L-CH) SP1 (L-CH) SP2 (R-CH)
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Page 54: Rear Speaker System
CD-C422/C422C/C2800/C2800C REAR SPEAKER SYSTEM SP1,2 904x3 904x3 Figure 11 SPEAKER EXPLODED VIEW (3/3) – 12 – – 11 –... -
Page 55: Packing Of The Set (For U.s.a. Only)
CD-C422/C422C/C2800/C2800C PACKING OFF THE SET (For U.S.A. Only) Setting position of switches and knobs Tape Mechanism STOP Unit CD-C422/CD-C2800 Rear Speaker(L/R) SPAKP0013AWZZ1 SPAKA0197AWZZ Polyethylene Bag Packing Add.,(Left/Right) 92L411-0063 Polyethylene Bag SPAKZ0383AWZZ Sheet 92L412-0064 Packing Add., (Top and bottom) CP-C422 Front Speaker(L/R) - Page 56 CD-C422/C422C/C2800/C2800C © COPYRIGHT 1998 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.