Sharp CD-C421H Service Manual
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Sharp CD-C421H Service Manual

Sharp CD-C421H Service Manual

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Illustration: CD-C421H
Illustration: CD-C411H
IMPORTANT SERVICE NOTES (For U.K. Only) ............................................................................................................. 2
SPECIFICATIONS ............................................................................................................................................................ 3
NAMES OF PARTS .......................................................................................................................................................... 4
OPERATION MANUAL ..................................................................................................................................................... 6
DISASSEMBLY .................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS .................................................................................................... 9
ADJUSTMENT ................................................................................................................................................................ 10
NOTES ON SCHEMATIC DIAGRAM ............................................................................................................................. 16
BLOCK DIAGRAM .......................................................................................................................................................... 17
WAVEFORMS OF CD CIRCUIT ..................................................................................................................................... 20
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 21
TROUBLESHOOTING (CD CHANGER CONTROL / CD SECTION) ............................................................................ 38
FUNCTION TABLE OF IC .............................................................................................................................................. 42
FL DISPLAY ..................................................................................................................................................................... 50
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For U.K. Only)
SERVICE MANUAL
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
CONTENTS
SHARP CORPORATION
- 1 -
CD-C421H / C411H
No. S5834CDC421H/
CD-C421H
CP-C421H and SURROUND
(GBOXS00018AWZZ)Constitute CD-C421H.
CD-C411H
CP-C411H Constitute CD-C411H.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
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Summary of Contents for Sharp CD-C421H

  • Page 1: Table Of Contents

    CD-C421H / C411H SERVICE MANUAL No. S5834CDC421H/ CD-C421H CP-C421H and SURROUND (GBOXS00018AWZZ)Constitute CD-C421H. CD-C411H CP-C411H Constitute CD-C411H. Illustration: CD-C421H • 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.k. Only)

    CD-C421H / C411H SAFETY PRECAUTION FOR (FOR GERMANY) 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: Specifications

    CD-C421H / C411H FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS CD-C421H Cassette deck section General Frequency Power source: AC 230 V, 50 Hz response: 50-14,000 Hz (Normal tape) Power consumption:...

  • Page 4: Names Of Parts

    CD-C421H / C411H NAMES OF PARTS CD-C421H/C411H Front Panel 1. Disc Tray 2. Disc Skip Button 3. Open/Close Button: 4. CD Play Indicator: 5. CD Repeat Indicator: 8 9 10 11 6. CD Pause Indicator: 4 5 6 7. Disc Number Indicators 8.
  • Page 5 CD-C421H / C411H Speaker Section CP-C421H Front Speaker CP-C421H 6. Tweeter 7. Woofer 8. Bass Reflex Duct 9. Speaker Wire CP-C411H 6. Full-Range Speaker 7. Bass Reflex Duct 8. Speaker Wire CP-C411H Surround Speaker [CD-C421H Only] GBOXS00018AWZZ 10. Full-Range Speaker 11.

  • Page 6: Operation Manual

    CD-C421H / C411H OPERATION MANUAL – 6 –...

  • Page 7: Disassembly

    CD-C421H / C411H DISASSEMBLY Caution on Disassembly CD-C421H/C411H Follow the below-mentioned notes when disassembling Top Cabinet the unit and reassembling it, to keep it safe and ensure ( A1 ) x2 excellent performance: ø3 x12mm 1. Take cassette tape and compact disc out of the unit.
  • Page 8 CD-C421H / C411H ( F1 ) x2 ø3 x10mm ( J1 ) x1 Switch PWB ø3 x10mm ( F1 ) x3 Front Panel ø3 x10mm ( F1 ) x1 ( J2 ) x1 Display ø3 x 8mm Washer Turntable Main PWB...

  • Page 9: Removing And Reinstalling The Main Parts

    ( A2 ) x1 Figure 9-1 Figure 9-2 Notes: The Surround speakers (CD-C421H only) can be easily disassembled.Therefore the disassembling method is not discribed.For details refer to the disassembling drawing in the Parts Guide. REMOVING AND REINSTALLING THE MAIN PARTS...

  • Page 10: Adjustment

    CD-C421H / C411H ADJUSTMENT TUNER SECTION MECHANISM SECTION • Driving Force Check fL: Low-range frequency fH: High-renge frequency Torque Meter Specified Value • AM IF/RF Play: TW-2412 Tape 1: Over 80 g Signal generator: 400 Hz, 30%, AM modulated Tape 2: Over 80 g...
  • Page 11 CD-C421H / C411H TEST MODE • Setting the test mode Any one of test mode can be set by pressing several keys as follows. <REC. PAUSE> + <CD> + <POWER> TEST: CD operation test • TEST mode Function — CD test mode Setting of TEST mode Indication of CD TST mode (Fig.
  • Page 12 Descriptions of the PTY (Programme Type) codes, TP (Traffic System) Programme) and TA (Traffic Announcement) Eith the CD-C421H/C411H, you can search for and receive RDS is a broadcasting service which a growing number of FM the forrowing PTY, TP and TA signals.
  • Page 13 CD-C421H / C411H – 13 –...
  • Page 14 PTY search function is equal to FM band search function as a result. 1. Introduction of RDS for CD-C421H/C411H CD-C421H/C411H RDS function is equal to adding EON feature to the current CD-C75H RDS. EON feature is EON—PTY and EON—TI. Although PTY and TI indicators are separated, PTY contains TI in the PTY items (software) like current PTY search items.
  • Page 15 CD-C421H / C411H EON summary notice for reference 1. EON-TI/PTY EON stand-by can be set, only when EON ind. lights up. While EON ind. goes out (NO EON STATION), EON stand-by can't be set. If the EON button is pressed, then “NO EON” is indication the display.

  • Page 16: Notes On Schematic Diagram

    CD-C421H / C411H 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 17: Block Diagram

    CD-C421H / C411H Figure 17 BLOCK DIAGRAM (1/3) – 17 –...
  • Page 18 CD-C421H / C411H SO301 FM IF ANTENNA CF351 X351 AMP. FL701 TERMINAL FM IF FM IF FM FRONT END QT21 CF301 Q301 CF302 AM IF FE301 LOW PASS FM IF IN T351 FILTER L354 (AC) FM/AM ANTENNA IC303 VR351 FM IF DET/FM MPX/AM IF...
  • Page 19 CD-C421H / C411H FL701 8 6 5 SW725,726 –VP Q701 19 21 22 (AC) KEY5 KEY MATRIX –VP SW701~SW724 KEY1 IC701 IX0223AW SYSTEM MICROCOMPUTER RESET Q702 SYS STOP XL701 Q703 24 20 52 40 14 15 16 17 18 Q704...

  • Page 20: Waveforms Of Cd Circuit

    CD-C421H / C411H WAVEFORMS OF CD CIRCUIT STOP PLAY FOCUS SERCH 0.5ms 0.50 V 10.0 V IC1 20 F.E 0.5ms 10.0 V 0.5ms 5.0 V 0.50 V IC1 54 DRF 0.5ms 1.00 V PLAY 0.5ms NORMAL DISC 1.00 V TN0=01 20ms 1.00 V...

  • Page 21: Schematic Diagram / Wiring Side Of P.w.board

    CD-C421H / C411H DISPULAY PWB-A2 SW721 SW714 VOLUME VOLUME DOWN SW722 X-BASS/ EQUALIZER FW703 SW713 TO MAIN PWB TUNING UP P22 4-A /TIME C719 SW715 R790 RANDOM/ DEMO RX701 C718 R795 R751 ZD701 R769 R738 SW720 TUNING DOWN R770 /TIME...
  • Page 22 CD-C421H / C411H TO DISPLAY PWB P21 2-B CNPM1 TO TAPE MECHANISM PWB FW703 P24 5-D CNS703 R569 R511 R514 Q571 Q511 R568 CNSM1 Q514 R583 R570 Q583 C571 C570 C511 Q513 Q582 C584 C572 R512 R513 L501 C609 R584...
  • Page 23 CD-C421H / C411H TO DISPLAY PWB P21 2-F MAIN PWB-A1 FW702 CNS702 IC91 CNS10 TO CD MECHANISM P25 8-E CNS601 D601 R630 R644 R638 C608 CNS2A R629 R602 TO CD MECHANISM R631 P25 8-C R642 R623 R639 R643 R640 R641...
  • Page 24 CD-C421H / C411H When Servicing, pay attention as the area enclosed by this line ) is directly connected with AC main voltage. POWER PWB-B D903 PT901 POWER TRANSFORMER D901 L901 CORE MAIN PWB D905 P22 3-F D907 CNP901 C910 TF901...
  • Page 25 CD-C421H / C411H PICKUP UNIT(306) CNS1A CNS1B TO MAIN PWB P23 12-E CNP1 TO MAIN PWB P23 12-C CNP2 CNS2A CNS2B CNS5 MECHA UP DISC NUMBER SENSOR PWB-E OPEN/CLOSE T/T UP/DOWN LOADING CNS10 TO MAIN PWB P23 12-B SOLENOID SOLM2...
  • Page 26 CD-C421H / C411H TUNER PWB-C CT23 RT30 RT29 RT32 RT37 RT28 RT33 RT36 RT34 RT35 R366 CT37 E C B XT21 Q354 CT26 Q353 R377 E C B LT22 R361 C371 CNS303 C374 C373 R370 X351 C368 R357 TO MAIN PWB...
  • Page 27 CD-C421H / C411H IC501 IC303 IC401 IC701 NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE –24.7V 2V(2V) 0.41V 2V(2V) –24.7V 2.1V 0.6V 7.2V(8.2V) –24.7V 2.1V 0.5V(0.8V) –24.7V 4.4V 1.8V 2V(2V) –24.7V 2.2V 1.3V...
  • Page 28 CD-C421H / C411H TO TUNER PWB TO DISPLAY PWB P37 9-G P35 7-A FW702 CNS303 TO MAIN PWB(3/3) POWER AMP. TO MAIN PWB(3/3) SECTION POWER AMP.SECTION CNP303 P32 2-F P32 2-F 9 8 7 6 5 4 3 2 1 C602 150P +5.6V...
  • Page 29 CD-C421H / C411H TO TUNER PWB P37 9-G CNS303 TO MAIN PWB(2/3) CD SECTION P31 11-C CNP303 C412 R412 C456 390P 220P RIGHT R414 SO401 1.5K VIDEO/AUX R413 R418 1.5K LEFT C457 R411 C411 C402 220P 390P 0.047 R402 (ML)
  • Page 30 CD-C421H / C411H R1 1K 0.01 KTA1266 GR 47/16 0.33/50 1/50 0.47/50 – FIN2 – – FIN1 EFBAL – – – FOSTA – DGND TOSTA – 2FREQ 0.1/50 – LASER – 0.033 TE– – FSTA 100K LA9241M 8/12CM 0.001 SERVO AMP.
  • Page 31 CD-C421H / C411H LC78622K SERVO/SIGNAL CONTROL 0.01 0.022 EFLG 16.93MHz U-COM SBSY SUB-CODE INTERFACE DEF1 XVSS 3.3M X-TAL XOUT GENERATOR 2KX8 0.022 0.047 VVSS XVDD ISET MUTER 0.022 RVDD 0.047 VCO CLOCK ERROR COERECT 2.7K 220P CD_R RCHO OSC CONTROL...
  • Page 32 CD-C421H / C411H MAIN PWB-A1(3/3) IC961 – LA4451:411H LA4450:421H – POWER AMP. FM SIGNAL C975 1000/25 C963 1/50 MAIN_L TO MAIN PWB(1/3) A_GND C976 A.P.SECTION 1000/25 MAIN_R R975 P29 12-C C964 C968 (1/2W) 1/50 R972 0.001 C977 C972 C980 0.001...
  • Page 33 CD-C421H / C411H HEADPHONE PWB-A4 R982 330 (1/2W) JK961 HEADPHONES R975 R981 (1/2W) L963 R972 2.2mH (1/2W) L962 L961 421H ONLY C977 0.29µH 0.29µH (ML) C986 C989 0.022 0.022 R986 (ML) (ML) LUG962 C979 R983 2.2:411H (258) 2.2:411H 3.3:421H CHASSIS 3.3:421H...
  • Page 34 CD-C421H / C411H TO MAIN FW702 FL701 FL DISPLAY 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5...
  • Page 35 CD-C421H / C411H TO MAIN PWB(1/3) P28 5-B DISPLAY PWB-A3 R759 R760 FW701 SW725 SW726 OPEN DISC /CLOSE SKIP R701 R702 R703 1.2K R705 SW701 SW702 SW703 L702 R706 1.8K 0.82µH TIMER CLOCK R707 STAND-BY /SLEEP R709 R711 R712 R713...
  • Page 36 CD-C421H / C411H VD301-1 C343 AM ANT. KV1236Z23F L354 R319 C342 R358 0.022 100K 8.2K VR351 T302 10K(B) C332 C323 L353 C338 0.022 FM MUTE 0.022 LEVEL 0.001 FILT D303 R350 SHASSIS 1SS133 2.7K C367 1/50 D304 24 23 22...
  • Page 37 CD-C421H / C411H QT21 RT34 KTC3199 GR RT36 5.2V RT37 RT35 2.6V (0V) 220K 220K 220K (0V) (0V) RT26 RT30 RT28 R357 470K LT22 C373 L354 2.2µH CT28 0.033 R363 47/10 1.5K CT29 C371 0.022 1/50 MUTING 24 23 22 21...

  • Page 38: Troubleshooting (Cd Changer Control / Cd Section)

    CD-C421H / C411H 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 39 CD-C421H / C411H • 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 40 CD-C421H / C411H • 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). If the disc is not turning, the DRF Does the DRF signal change from "L"...
  • Page 41 CD-C421H / C411H • 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.

  • Page 42: Function Table Of Ic

    CD-C421H / C411H FUNCTION TABLE OF IC IC2 VHiLC78622K-1:Servo/Signal Control(LC78622K) (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 43 CD-C421H / C411H VHiLC78622K-1:Servo/Signal Control(LC78622K) (2/2) Pin No. Terminal Name Input/Output 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 44 CD-C421H / C411H 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 45 CD-C421H / C411H 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 46 CD-C421H / C411H IC601 RH-iX0225AWZZ:Main System Microcomputer (IX0225AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function Output Not used OUT:H OPEN T_RECPLY Output REC/P.B Selection Output Not used OUT:H OPEN Output CD Mute Contorol DSPRES Output Reset Output For CD Display...
  • Page 47 CD-C421H / C411H IC601 RH-iX0225AWZZ:Main System Microcomputer (IX0225AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function P115 Output Not used OUT:H OPEN P114 SRS_P Input SRS exsists or not exist 65*-66* P113-112 Output Not used OUT:H OPEN P111 Input...
  • Page 48 CD-C421H / C411H IC701 RH-iX0223AWZZ:System Microcomputer (IX0223AW) (1/2) Pin No. Port Name Terminal Name Input/Output Function FIP6-0 G06-00 Output – — +Power Supply SCK0 C2B CLK Output C2B Serial Clock Output C2B DO Output C2B Serial Data Output C2B DI...
  • Page 49 CD-C421H / C411H 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 P33/ P113/ FIP21 P112/ P34/TI2 FIP20 P35/PCL P111/ LED CLK FIP19 P110/ P36/BUZ LED DATA...

  • Page 50: Fl Display

    CD-C421H / C411H 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)
  • Page 51 CD-C421H / C411H 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)

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