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Sharp MD-C2 Service Manual

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INPORTANT SERVICE NOTES (FOR U.S.A. ONLY) ........................................................................................................ 2
SPECIFICATIONS ............................................................................................................................................................. 3
NAMES OF PARTS ........................................................................................................................................................... 4
OPERATION MANUAL ....................................................................................................................................................... 7
DISASSEMBLY .................................................................................................................................................................. 9
REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 14
ADJUSTMENT ................................................................................................................................................................. 18
EEPROM WRITING PROCEDURE .................................................................................................................................. 25
EXPLANATION OF ERROR DISPLAY ............................................................................................................................. 27
EXPLANATION OF MECHANISM ERROR ...................................................................................................................... 28
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 29
TYPE OF TRANSISTOR AND LED ................................................................................................................................. 30
BLOCK DIAGRAM ........................................................................................................................................................... 31
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 36
WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 64
WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 65
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 67
TROUBLESHOOTING (AMP SECTION) .......................................................................................................................... 71
TROUBLESHOOTING (MD SECTION) ........................................................................................................................... 72
FUNCTION TABLE OF IC ................................................................................................................................................ 77
REPLACEMENT PARTS LIST/EXPLODED VIEW/PACKING OF THE SET (FOR U.S.A. ONLY)
SERVICE MANUAL
CONTENTS
SHARP CORPORATION
- 1 -
MD-C2 MD mini system Consisting of
MD-C2(Main unit) and CP-MDC2(Speaker
system).
• 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.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MD-C2
No.S4916MDC2////
MD-C2
Page

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  • Page 1: Table Of Contents

    MD-C2 SERVICE MANUAL No.S4916MDC2//// MD-C2 MD-C2 MD mini system Consisting of MD-C2(Main unit) and CP-MDC2(Speaker system). • 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.

  • Page 2: Inportant Service Notes (For U.s.a. Only)

    MD-C2 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: Specifications

    MD-C2 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS MD-C2 MiniDisc recorder section Cassette deck section Type: 3-disc multi-play MiniDisc re- Type: Compact cassette tape corder Frequency response: 50 - 14,000 Hz (Normal tape)

  • Page 4: Names Of Parts

    MD-C2 NAMES OF PARTS MD-C2 Front panel (CD) Disc Skip Button (CD) Select/Direct Play Buttons (CD) Open/Close Button (CD) Disc Tray Surround Button Extra Bass Button Pre-programmed Equalizer Button Timer Set Indicator (MD) Record Stand-by Button (TAPE) Record Stand-by Button...
  • Page 5 MD-C2 Display window 10 11 12 13 14 15 (MD/CD) Random Play Indicator Timer Play Indicator Timer Record Indicator (MD/CD) Repeat Indicator (MD/CD) Play Indicator Memory Indicator (TAPE) Record Indicator 16 17 (MD) Record Indicator (MD/CD) Pause Indicator Total Time Indicator...
  • Page 6 MD-C2 Remote control Remote Control Transmitter LED (TUNER) Preset Up/Down Buttons (MD/CD) Clear Button MD Time Button (TAPE) Record Stand-by Button (MD) Record Stand-by Button (MD/CD) Select/Direct Play Buttons (MD/CD) Memory Button (MD/CD) Enter Button (MD/CD) Track Down/Review Button (TAPE) Rewind Button...

  • Page 7: Operation Manual

    MD-C2 OPERATION MANUAL – 7 –...
  • Page 8 MD-C2 – 8 –...

  • Page 9: Disassembly

    4. While repairing, pay utmost attention to static electricity short circuit by being careful not to allow it to touch the on ICs. PWB. Note 3: After removing the connector for the optical pickup MD-C2 MAIN UNIT from the connector wrap the conductive aluminium STEP REMOVAL PROCEDURE...
  • Page 10 MD-C2 CD Tray Cover (D3) x1 Hook (D2) x3 (C1) x3 Pull (K1) x1 (K1) x2 Main CD Player Unit (J1) x2 (D3) x1 ø3 x10mm Rear Panel (D1) x1 Main PWB ø3 x12mm Tuner PWB (E1) x2 ø3 x12mm...
  • Page 11 Headphones Bracket (P1) x1 ø3 x10mm (R4) x2 ø3 x10mm Figure 11-1 JOG PWB Figure 11-2 (A1) x1 MD-C2 CD UNIT ø3 x8mm PROCEDURE STEP REMOVAL FIGURE CD Servo PWB 1. Screw ....(A1) x1 11-3 CD Servo PWB (Note 3) 2.

  • Page 12: See Fig

    MD-C2 MD-C2 MD UNIT STEP REMOVAL PROCEDURE FIGURE Shield Case 1. Screw ....(A1) x7 12-1 MD Main PWB 1. Screw ....(B1) x3 12-1 2. Socket ....(B2) x1 3. Flat Cable ..(B3) x2 MD Changer Switch PWB 1. Screw ....(C1) x3...
  • Page 13 MD-C2 MD Mechanisum (D2 ) x2 ø2 x7mm (D2 ) x3 ø2 x7mm (NOTE3) (D4) x1 Holder,PWB (D6) x1 ł › Nylon Band MD Relay PWB (D3) x3 (D5) x1 Mechanisum Holder (D7) x4 Screw Special Note: Before reinstalling the mechanism block, secure the...

  • Page 14: Removing And Reinstalling The Main Parts

    MD-C2 REMOVING AND REINSTALLING THE MAIN PARTS (A1) x1 MD MECHANISM SECTION ø1.7 x3mm For details about the procedure to remove the MD mechanism from the main unit, refer to the Disassembly Procedure, Steps 1 - 6 in the main unit and also the MD section.
  • Page 15 MD-C2 How to remove the sled motor/loading motor (D1) x2 (D1) x2 (See Fig. 15-1) ø1.7 x2mm ø1.7 x2mm 1. Remove the screws (D1) x 4 pcs., and remove the sled motor/loading motor. Caution: Be careful so that the gear is not damaged.
  • Page 16 MD-C2 How to remove the MD lift Motor (G1) x3 ø2 x4mm (See Fig. 16-1) 1. Remove the screws (G1)x 6 pcs., and remove the chassis. (G1) x3 2. Remove the screws (G2)x 2 pcs., and remove the gear box.

  • Page 17: Cd Mechanism Section

    MD-C2 CD MECHANISM SECTION Stop Washer ( A1 ) x2 ( A3 ) x1 For details about the procedure to remove the CD mechanism ø2.6 x6mm from the main unit, refer to Disassembly Procedure, Steps 1 Optical Pickup - 4 in the main unit and also the CD section. (p.9~11).

  • Page 18: Adjustment

    MD-C2 ADJUSTMENT When you need to remove the display PWB and main PWB for adjustment, use a prolongation cable for servicing. Extension Cable (See Fig. 24-6) Type Part No. Extension Cable (12 Pin) QCNWK0123AFZZ TUNER SECTION • Detection Signal generator: 10.7 MHz, FM sweep generator...

  • Page 19: Cd Test Mode

    MD-C2 CD TEST MODE CD test mode setting Any one of test mode can be set by pressing several buttons as follows. Holding down CD DISC1 and key, turn on POWER key. Test Mode Function - CD TEST mode Setting of Test mode Initialization is not performed.
  • Page 20 MD-C2 MD SECTION When the combination of mechanism/pickup and PWB was changed , set the TEST mode to perform the AUTO preliminary adjustment and AUTO adjustment, write the adjustment data in EEPROM. When EEPROM was replaced, set the TEST mode,write the EEPROM set data (p25,p26) and then perform the preliminary adjustment and AUTO adjustment, write adjustment data in EEPROM.
  • Page 21 MD-C2 2. Test mode Test mode setting method 1. Holding down the MD1 PLAY button and FF( )button, press POWER button switch. (State A is changed to state B .) 2. Load playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc) into DISC 3, and press MD RELEASE.
  • Page 22 MD-C2 1. EJECT mode Step No. Setting Method Remarks Display Step 1 Testmode EJECT state [ _ _ E J E C T _ _ _ ] Step 2 Press once the DISPLAY button. Playback power output state [ P P W _ _ _ _ _ _ _ ] Step 3 Press once the DISPLAY button.
  • Page 23 MD-C2 5. TEST-PLAY mode (For comfirmation of the playback ability at the named address.) Step No. Setting Method Remarks Display Step 1 Testmode STOP state The AUTO preliminary adjustment should have been completed. [ t s m Step 2 Press the X-BASS button.
  • Page 24 MD-C2 Lead-in switch position measurement mode Loosen the two screws(A) Insert High reflection test disk (TGYS1) Note: Adjust the lead-in switch position to FF85 to FFDF. 1. Loosen the screw (A) x 2 pcs. which fix the mechanism switch PWB.

  • Page 25: Eeprom Writing Procedure

    MD-C2 EEPROM WRITING PROCEDURE EEPROM DATA LIST (Version : 01) EEPROM (IC1402) writing procedure Focus setting 1. Method for setting the reference temperature value Item indication Setting (This setting should be performed quickly at a room temperature, between 21 C and 29 C when the PWB is not hot.)
  • Page 26 MD-C2 Slide setting Control setting Item indication Setting Item indication Setting S L G C O N T R L 1 S L 2 C O N T R L 2 S L D L I M S P K L E V m...

  • Page 27: Explanation Of Error Display

    MD-C2 EXPLANATION OF ERROR DISPLAY Error display Corrective action Errors Can't REC • Defect occurred successively 10 times during REC-PLAY. • Check that the disc is free from flaw, dust • As a result of occurrence of defect during REC-PLAY the and fingerprint.

  • Page 28: Explanation Of Mechanism Error

    MD-C2 Error display Corrective action Errors BLANK MD • UTOC was read but total TNO and the number of characters of • Perform recording to check that the disc NAME was 0? is recordable disc. TOC W ERR • Although UTOC can be read but UTOC cannot be rewritten.

  • Page 29: Notes On Schematic Diagram

    MD-C2 NOTES ON SCHEMATIC DIAGRAM • Resistor: • The indicated voltage in each section is the one measured by Digital To differentiate the units of resistors, such symbol as K and M are Multimeter between such a section and the chassis with no signal used: the symbol K means 1000 ohm and the symbol M means 1000 given.

  • Page 30: Type Of Transistor And Led

    MD-C2 TYPE OF TRANSISTOR AND LED (FRONT VIEW) (FRONT VIEW) FRONT FRONT VIEW FRONT FRONT FRONT VIEW VIEW VIEW VIEW B C E KDV147B 1 2 3 2SB1375 KIA7806P AN78L05 HE8550 D HSC1815 GR HSA1015 GR 2SD2012 KIA7812P 2SC2236 Y...

  • Page 31: Block Diagram

    MD-C2 IC1300 6.5/4.75~5.25V TC74ACT02F RECORDING HEAD 3.2V HEAD XL1201 DRIVE CIRCUIT (33.8688MHz) IC1201 LR376484 ENDEC/ATRAC M1951 SPINDLE MOTOR PICKUP UNIT FOCUS M1953 TRACKING SLED MOTOR IC1101 LIGHT RECEIVING E–FSIGNAL A–BSIGNAL IR3R55 SECTION ERROR RF SERVO/ SIGNAL SIGNAL RF1 ~ RF4SIGNAL...
  • Page 32 MD-C2 OPTICAL PICUP MK03 SLED MOTOR MK02 SPINDLE MOTOR VREF SOK01 SOLENOID LASER DRIVER M63001FP FOCUS/TRACKING/SPIN/ SLED/LOADING DRIVER LA9241M SL– MK01 SERVO AMP. UP/DOWN LOADING MOTOR +12V (+B1) (+B2) 14 13 CONT 1 CONT 2 16.934MHz CONT 3 XOUT CONT 4...
  • Page 33 MD-C2 TO MICROCOMPUTER 9 8 7 6 5 4 3 2 1 CNP303 AM/FM SWITCHING TP303 Q342 VCO ADJ SWITCHING AM/FM Q344 VR351 FM-M/ST TP302 Q342 MPX IN DET OUT ST IND AM IF AM IF 7 6 5 4 3...
  • Page 34 MD-C2 CNP303 D GND CIRCUIT CNP99 28P FFC TUNER DIGOUT ICG01 CIRCUIT A+12V D.GND DIGIN A-GND NAND GATE BACKUP TUN MUTE 74HCT00F PDOWN RESET MD–ST DSCK SERCH KDATA MDDATA DSTB D.GND D.GND D.GND CIRCUIT QG03 QG02 D.GND DVDD DVDD SYSTE...
  • Page 35 MD-C2 FLD01 FL DISPLAY SY-DAT SA-COM/ 65 66 SY-CLK SY-STB ON/STAND LEDD01 QD01 SWF02 DEMO ICD01 RMD01 REMOTE IX0266AW SENSOR FL DRIVER QD07 QD14 LEDD02 ICF01 LEDD20 YSTEM CONTROL 14 25 26 89 15 16 17 CROCOMPUTER DISP-RES QD04 IX0265AW...

  • Page 36: Schematic Diagram / Wiring Side Of P.w.board

    MD-C2 P39 12-C P39 12-A~D TO MAIN TO MAIN PWB(2/3) PWB(2/3) GND(D) RG01 8.2K C2_CL RG02 10K RG03 10K DO(u-COM DI) C2_DO RG04 10K C2_CE CG10 47/25 DI(u–COM DO) C2_DI +12V(A) A_GND 80 79 78 77 76 75 74 73 72...
  • Page 37 MD-C2 P41 12-C~E P41 12-D,E P39 12-A~H TO MAIN TO MAIN TO MAIN PWB(3/3) PWB(2/3) PWB(3/3) DEMO 10 11 12 13 14 16 17 18 20 21 22 23 24 25 26 27 28 29 SWF02 MAIN PWB-A(1/3) MD RECORD SIGNAL...
  • Page 38 MD-C2 RM09 TAPE MECHANISM QM01 QM04 PWB-H (296-4) HE8550 D RM01 KRC107 M RM02 100K 2.2K QM02 RM04 HE8550 SD 3.8V QM05 PHK00 RM03 KRC107 M RM05 PHOTO 100K 2.2K PHOTO RUN PULSE M_GND RM06 MOT+ RM08 8.2K SWK00 P.F(REC) 5.3V...
  • Page 39 MD-C2 +12V(M) TA_MOTOR TA_SOL M_GND RUN_PULSE TA_FP_SW TA_CAM_SW TA_PB/REC TA_PB_MUTE TA_REC_MUTE TAPE_LCH TAPE_RCH RK51 220K TAREC_LCH TAREC_RCH RK52 220K RK37 QK11 P40 3-A QK12 QK14 HSC1815 GR HSC1815 GR TO MAIN HSC1815 GR 9.3V PWB(3/3) 0.66V 0.66V 0.66V 0.66V RK50...
  • Page 40 MD-C2 P37 7-H P39 12-D,E P39 1-C TO MAIN TO MAIN TO MAIN PWB(1/3) PWB(1/3) PWB(2/3) MAIN PWB-A(3/3) RU54 RU73 RU53 CU51 100P CU45 CU49 2.2/50 100P RU31 RU29 RU27 100K RU25 10.6V CU47 ICU01 0.047 NJM4558MF– OPE AMP. CU46 RU26 2.2/50...
  • Page 41 MD-C2 P39 12-C P37 8-H TO MAIN TO MAIN PWB(2/3) P39 12-C WB(1/3) PWB(1/3) TO MAIN PWB(2/3) JTUU00 AUX IN RU01 RU06 RU07 LEFT 4.7K 4.7K CU01 RU03 CU00 RU02 CU02 CU03 RIGHT RU00 CU10 2.2/50 CHASSIS 64 63 62 61 60...
  • Page 42 MD-C2 P60 4-A TO MD MAIN PWB CNS11 (TOP VIEW) CN1501 P57 12-D TO CD SERVO PWB CNS99 P57 12-C CNP11 TO CD SERVO PWB CNP99 RG08 ICG01 CNPF03 BIF04 RG13 RG14 JTU00 AUX IN BIF01 LEFT RU03 CU01 ICH01...
  • Page 43 MD-C2 P57 12-B TO CD SERVO PWB CNP12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 CG22 RG08 QG02 CNPF06 BIF02 P47 12-E TO DISPLAY PWB CNSD01 DG05 RF92 RF90 RF19 CG07 CG08...
  • Page 44 MD-C2 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 TIMER–LED LEDD01 SLI342UCE –31.4V –31.4V NR5–LED LEDD08 LMKD515B –31.4V –31.4V NR4–LED LEDD07 SLI342YCE RD31 1.2K 3.64V RD38 820 0.46V...
  • Page 45 MD-C2 FLD01 FL DISPLAY 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 –31.3V –31.3V –31.3V –31.3V S16 NC 4.95V VDD3 –29.6V –29.6V –29.6V 266AW –29.6V RIVER –29.6V –29.6V –29.6V RE71 CD30 –29.6V...
  • Page 46 MD-C2 LEDD23 TRAY SWITCH RD55 RD54 PWB-B2 RD53 SWD07 OPEN/CLOSE DISPLAY PWB-B1 RE74 RE75 RE76 CD03 FLD01 SWD23 RD44 RD38 MD REC RD04 RD37 RD72 CD02 RD05 RD08 RD70 RD06 RD31 RD07 SWD21 ICD01 TAPE REC CD08 CD07 LEDD01 RD69...
  • Page 47 MD-C2 LEDD23 LEDD22 LEDD21 RD54 RD29 RD28 RD53 RD27 RD52 SWD07 SWD05 SWD06 SWD04 SWD03 OPEN/CLOSE DISC2 DISC1 DISC3 CD SKIP RD110 RD25 FLD01 RE72 RE71 SWD10 RD24 SURROUND RD23 RD60 RD22 RD26 RD59 RD21 RMD01 RD20 SWD09 RD19 X-BASS...
  • Page 48 MD-C2 ICV00 STK40705 R CH POWER AMP. QV00 HSC1815 GR L CH CV14 0.022 RV18 CV08 CV09 CV12 QV03 CV00 HSC1815 GR RV10 47/50 RV08 CV01 RV07 47/50 RV00 RV47 RV09 CV13 CV11 47/50 RV01 RV03 RV04 CV06 CV07 RV11...
  • Page 49 MD-C2 SOV00 RATED SPEAKER RLV00 IMPEDANCE :6OHMS MIN LEFT CV18 CV17 (ML) (ML) RIGHT CV20 CV19 (ML) (ML) RV23 RV22 CHASSIS QV03 HSC1815 GR RV48 10.8V DV08 QV08 1SS133 MOV01 KRC107 M FAN MOTOR RV39 47 (1/2) DV06 6.9V 1SS133...
  • Page 50 MD-C2 T900 POWER TRANSFOMER CNS900 POWER PWB-C2 CNSV 1 2 3 4 5 6 7 AC120V 60Hz CNPV01 1 2 3 4 5 6 7 F803 1.25A/125V CNP802 CNP800 SO900 C805 C804 D812 D810 D809 D811 D804 D803 D802 L900...
  • Page 51 MD-C2 POWER AMP. PWB-C1 COLOR TABLE BROWN R827 RD(R) Q811 C832 3 2 1 ORANGE YELLOW GREEN BLUE C816 D819 VIOLET R819 D817 GRAY D816 WH(W) WHITE F804 IC803 BLACK 630mA/125V PINK FAN MOTOR MOV01 C815 C827 CNSV01 R807 R808...
  • Page 52 MD-C2 IC301 BF301 TA7358AP FM BPF FM FRONT END 1 2 3 C302 75 OHMS R306 C303 0.01 C304 C314 (CH) 4.7P 10/16 C306 C310 R309 0.001 T301 VD304 R314 CF301 KDV147B 10.7MHz FM IF R301 FM IF C309 C317 6.8P...
  • Page 53 MD-C2 AM IF T351 CF352 R359 2.7K AM IF 5.5V R361 (6.9V) C361 C363 7.2V 22/16 (1.2V) 4.8V 0.027 Q343 (6.8V) KRA109 M 5 6 7 TP303 C356 1.12V T352 3.3/50 (0V) TP302 C355 R375 3.3/50 R347 1.2K Q342 3.9K...
  • Page 54 MD-C2 47/16 0.01 KTA1266 GR 0.01 CNS1B CNS1A – 2.5V FIN2 – – 2.5V FIN1 EFBAL – – – 2.5V FOSTA 2.5V – DGND TOSTA 2.5V 2.4V – 2FREQ CNP1 0.1/50 – 2.5V LASER – 0.033 FSTA 2.5V – TE–...
  • Page 55 MD-C2 CD SIGNAL 0.01 2.3V 2.3V 4.7V 4.6V 4.6V 2.5V 2.5V EFLG MICROCOMPUTER SBSY SUB–CODE INTERFACE DEF1 XVSS X-TAL 3.3M XOUT GENERATOR 2K x 8 0.047 VVSS XVDD 5.0V ISET 1.9V MUTER 5.0V R-CH 4.6V VCO CLOCK 0.047 RVDD A_GND...
  • Page 56 MD-C2 75 OHMS CHASSIS SO301 C328 CHASSIS C329 T302 C303 C307 C311 L302 C312 C302 C330 R301 C310 VD303 C304 VD301-1 R303 C332 R309 R319 C305 C313 R320 VD301-2 R316 C319 R324 R323 R314 C314 VD304 C334 R312 C336 Q302...
  • Page 57 MD-C2 CD SERVO PWB-E COLOR TABLE BROWN R D( R ) ORANGE YELLOW GREEN BLUE VIOLET GRAY W H ( W ) WHITE BLACK PINK BI1-A ZD61 1 2 3 4 5 CNP1 CNP2 35 40 1 2 3 4 5 6 7 8 9 10...
  • Page 58 MD-C2 MD MAIN PWB-I MD RELAY PWB-J TP1124 C1108 C1110 0.47 0.0047 C1109 R1910 TP1938 +2.8V TP1937 POUT EFMAGI EFMAGC ADAGC TP1936 TP1132 0.7V 1.6V LVVOUT ADIPI APCOUT R1106 TP1933 0.7V 1.6V LDVCC ADIPO TP1133 DGND & DIFF DGND 0.7V...
  • Page 59 MD-C2 IN PWB-I Waveforms should be measured by inserting the circuit, as shown in the figre. C1204 0.047 TP1215 TP1218 TP1217 Connect an oscilloscope TP1216 100K 270P R1208 C1205 TP1202 TP1213 100 9 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 TP1201 1.55V...
  • Page 60 MD-C2 TO MAIN PWB P42 6-A CNPF03 MD MAIN PWB-I (TOP VIEW) CN1501 IC1300 TP1524 R1512 R1612 R1521 R1614 C1805 C1709 R1804 C1703 Q1804 C1713 R1110 R1108 R1111 R1420 R1457 R1109 C1453 TP1200 TP1135 R1407 C1117 C1114 R1410 C1405 C1454...
  • Page 61 MD-C2 MAGNET HEAD(37) RECORD MD MAIN PWB-I (BOTTOM VIEW) CN1300 C1606 C1511 C1301 Q1500 R1301 D1300 C1300 C1714 L1501 C1804 R1302 R1711 R1300 Q1702 CW1911 R1704 C1707 R1702 Q1803 L1701 R1701 IC1701 D1401 R1801 R1706 C1408 C1705 R1710 R1709 R1406...
  • Page 62 MD-C2 TO MD MAIN PWB TO MD MAIN PWB (BOTTOM VIEW) (BOTTOM VIEW) P61 12-F P61 12-C CN1401 CN1101 CN1921 CN1911 C1920 R1913 C1921 CN1904 CN1902 CN1901 CN1920 R1910 CW1904 CW1902 CW1901 MD RELAY PWB-J (TOP VIEW) MD LOADING MD SLED...
  • Page 63 MD-C2 CW1940 TO MD MAIN PWB (TOP VIEW) P60 4-H SW1942 CN1402 SLOT 3 CN1940 CN1941 CW1941 SW1941 SLOT 2 M1941 MD LIFT MOTOR SW1940 SLOT 1 SW1943 MD CHANGER SWITCH PWB-L LIFT A SW1944 LIFT B FLEXIBLE MD PICKUP UNIT (38)

  • Page 64: Waveforms Of Cd Circuit

    MD-C2 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 NORMAL DISC 0.5ms TN0=01 1.00 V 20ms PLAY 1.00 V 0.5ms...

  • Page 65: Waveforms Of Md Circuit

    MD-C2 WAVEFORMS OF MD CIRCUIT PLAY STATE PIT PLAY Stopped Stopped NORM: 100M S/s 1997 / 08 / 04 09:30:15 NORM: 1M S/s 1997 / 08 / 04 13:35:24 CH1 500mV 500ns/div 200mV 1ms/div AC 10:1 DC 10:1 DC 10:1...
  • Page 66 MD-C2 PLAY Stopped Stopped NORM: 1k S/s 1997 / 08 / 04 14:19:52 NORM: 100M S/s 1997 / 08 / 04 11:23:12 1s/div 2us/div DC 10:1 DC 10:1 DC 10:1 DC 10:1 DC 10:1 DC 10:1 DC 10:1 Filter Filter...

  • Page 67: Troubleshooting (Cd Section)

    MD-C2 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 68 MD-C2 • When turntable fails to move. When the mechanism is operating, is the following voltage Check the SW2(MECHA UP SW) and the wiring from the found on pin 96 on ICF01? ICF01 pin 94 to the SW2. CD mechanism up : 0V Other : 5.0V...
  • Page 69 MD-C2 • The CD operation keys work. Check the FOCUS-HF system. Playback can be performed without a disc. Focus search OK Does the pickup move up and down two twice? Check the area around IC3 to CNP2. Does the output waveform of IC1 pin 16 (FD) match that...
  • Page 70 MD-C2 • Check the tracking system. Check the waveform of IC1 pin 7 (TE). Check the periphery of IC1 pin 8 to pin The waveform shown in Figure 70-1 Tracking servo is inoperative. 15, and IC3 to CNP2. appears, and the disc condition is too slow in being displayed.

  • Page 71: Troubleshooting (Amp Section)

    MD-C2 • Although HF waveform is normal and time indication is normal, no sound is not output. Check the IC2 pin 48 (EFLG). Usually, the number of pulses of flawless disc is 100 pulses/sec or less. Check the IC2 pin 37 and 40.

  • Page 72: Troubleshooting (Md Section)

    MD-C2 TROUBLE SHOOTING (MD SECTION) When MD fails to operate If the objective lens of optical pickup is contaminated, MD may fail to operate. At first, clean the objective lens to check playback operation. If MD fails persistently to operate, perform checks as follows.
  • Page 73 MD-C2 • Changer disc loading is nor normal. When a disc is loaded into the disc 1 position, does the mechanism go to the disc 1 position? Does pin 55 on IC1401 change to L? Check the C1940, SW1940 Does either pin 7 or pin 9 on IC1602 change ? Check the IC1602, IC1401.
  • Page 74 MD-C2 • Normal playback When it has been confirmed that EEPROM value is normal in the TEST mode Is initialization performed normally when high reflection disc is Does the playback time display advance? played back? Check IC1201 Does disc rotate normally?
  • Page 75 MD-C2 • Record and playback operation Insert the low reflection disc, and after verifying the audio output in the normal mode playback set the record/playback TEST mode Recording from start address cannot be performed. Check whether the disc is record-prohibited.
  • Page 76 MD-C2 • Disc motor fails to run Check soldering joint and parts of pins 24 and 25 of IC1201, and Does waveform appear on the pins 24 and 25 of IC1201 in the peripheral circuit. TEST mode focus gain coarse adjustment step? Does waveform appear on the pins 9 and 10 of IC1601, pins 7 Check soldering joint of IC1601.

  • Page 77: Function Table Of Ic

    MD-C2 FUNCTION TABLE OF IC ICF01 RH-iX0265AW00:System Control Microcomputer (iX0265AW) (1/3) Active Setting Input/Output Terminal Name Port Name Function Pin No. Level in Reset 16KHz Input – – SPEANA input 16kHz 4LHz Input – – SPEANA input 4kHz 1KHz Input –...
  • Page 78 MD-C2 ICF01 RH-iX0265AW00:System Control Microcomputer (iX0265AW) (2/3) Setting Active Port Name Input/Output Function Pin No. Terminal Name in Reset Level HI-VOLT Output – TUNER AM : "L" V-LOAD2 Output – – V-LOAD1 Output – "H" : 5V, "L" : 6.5V...
  • Page 79 MD-C2 ICF01 RH-iX0265AW00:System Control Microcomputer (iX0265AW)(3/3) RUN PALSE 81 P87 S.W. MUT FP SW SYS MUT 82 P86 CAM SW 83 P85 84 P84 B CE Recognition of 85 P83 B SL destination 86 P82 B Si 87 P81 B SO...
  • Page 80 MD-C2 ICD01 RH-iX0266AW00:FL Driver (iX0266AW) (2/3) Setting Active Input/Output Terminal Name Port Name Function Pin No. in Reset Level LED-10 Output REW-LED drive LED-11 Output STOP-LED drive LED-12 Output PLAY-LED drive LED-13 Output FF-LED drive LED-14 Output MD3-LED drive LED-15...
  • Page 81 MD-C2 ICD01 RH-iX0266AW00:FL Driver (iX0266AW) (3/3) Setting Active Port Name Input/Output Function Pin No. Terminal Name in Reset Level OUTPUT – Fluorescent grid drive display OUTPUT – Fluorescent grid drive display OUTPUT – Fluorescent grid drive display OUTPUT – Fluorescent drive output OUTPUT –...
  • Page 82 MD-C2 IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (1/2) Terminal Name Input/Output Function Pin No. DEFI Input Input terminal of detect detection signal (DEF). Input For PLL Input terminal for test. Pull-down resistor is integrated. Output Output terminal of phase comparison for external VCO control.
  • Page 83 MD-C2 IC2 VHiLC78622N-1: Servo/Signal Control (LC78622NE) (2/2) Terminal Name Input/Output Function Pin No. SBCK Input Clock input terminal to read subcode. Schmit input. Output Output terminal of synchronous signal of 7.35kHz divided from quartz oscillation. Output Output terminal to stand by output of subcode Q.
  • Page 84 MD-C2 IC3 VHiM63001FP-1: Focus/Tracking/Spin/Sled/Loading Driver (M63001FP) Function Function Pin No. Terminal Name Pin No. Terminal Name IN2- CH2 inverted input IN5- CH5 inverted input IN5+ CH5 non-inverted output IN1A- CH1 inverted input IN1B- CH1 output offset control VCC2 Power supply 2 (CH4)
  • Page 85 MD-C2 ICU00 VHiLC75397E-1:Audio Processor (LR75397E) (1/2) Function Terminal Name Pin No. RBB1 Bus input/output terminal RBB2 Bus input/output terminal RBBOUT Bus input/output terminal RTIN Equalizer input terminal RF1C1 Capacitor and resistor connection terminal for configuring the F1 band equalizer filter.
  • Page 86 MD-C2 ICU00 VHiLC75397E-1: Audio Processor (LR75397E) (2/2) Function Terminal Name Pin No. Input signal terminal Input signal terminal Input signal terminal Input signal terminal Power terminal NO CONNECTION terminals. leave open or connect to VSS. Input signal terminal Input signal terminal...
  • Page 87 MD-C2 IC1202 RH-iX2474AFZZ: 4bit D-DRAM (iX2474AF) Function Terminal Name Pin No. 1, 2 I/O1, I/O2 Data input/Data output Write enable Row address storobe Address input A0-A3 Address input Power (3.3V) 11-15 A4-A8 Address input Output enable Column address storobe 18, 19...
  • Page 88 MD-C2 IC1101 VHiiR3R55//-1:RF Signal Processing (iR3R55) (1/2) Function Terminal Name Pin No. RF signal input terminal 2 . The RF signal received is applied here. RF signal input terminal 1 . The RF signal received is applied here. RF signal input terminal 4 .
  • Page 89 MD-C2 IC1101 VHiiR3R55//-1:RF Signal Processing (iR3R55) (2/2) ADIPI ADIPO DIFF DIFF ADLPFO ADIP 22KO REFI 22KI REFO BIAS RFADD TCGO TCGI AOUT BOUT EOUT LOGIC FOUT Figure 89-1 BLOCK DIAGRAM OF IC IC1201 VHiLR376484-1:ATRAC Encoder and Decoder/Compressing and Expansion (LR376484) (1/3)
  • Page 90 MD-C2 IC1201 VHiLR376484-1: ATRAC Encoder and Decoder/Compressing and Expansion (LR376484) (2/3) Terminal Name Input/Output Function Pin No. EFMMON Output EFM monitor output AVCC – Analog power EFMI Input EFM signal input from the RF amplifier AGND – Analog ground Input...
  • Page 91 MD-C2 IC1201 VHiLR376484-1: ATRAC Encoder and Decoder/Compressing and Expansion (LR376484) (3/3) Terminal Name Input/Output Function Pin No. X700KO Output Clock output. f=705.6kHz. When RSTX=0, the clock output is not available. EXPORT0 Output Microcomputer extension output port0 EXPORT1 Output Microcomputer extension output port1...
  • Page 92 MD-C2 IC1401 RX-iX0276AWZZ:MD System Microcomputer (iX0276AW) (1/2) Terminal Name Input/Output Function Pin No. Output Input/output port P96 SBCK Output Input/output port P95 LDVAR Output LDVAR (Laser power output adjustment) ADIS Output ADIS (For automatic adjustment step check) SFSY Output Input/output port P92...
  • Page 93 MD-C2 IC1401 RX-iX0276AWZZ:MD System Microcomputer (iX0276AW) (2/2) Terminal Name Input/Output Function Pin No. SYS D2 In/Output SYS D2 (Data bus 2) SYS D1 In/Output SYS D1 (Data bus 1) SYS D0 In/Output SYS D0 (Data bus 0) SLOT1 Input Input/output port P37. MD changer mechanism slot 1 SW Disc IN: L...
  • Page 94 MD-C2 IC1601 VHiM56788FP-1:Motor Driver (M56788FP) Function Function Pin No. Terminal Name Pin No. Terminal Name CH3IN CH3 non-inverted input VREFO Reference voltage output VREF Reference voltage input OUT3 E3 amplifier output IN3- E3 amplifier inverted input SS.GND Small signal GND...
  • Page 95 MD-C2 IC1701 VHiUDA1344/-1: AD/DA Converter (UDA1344) Pin No. Terminal Name Function AD converter analog ground SSA(ADC) AD converter analog power DDA(ADC) VINL AD converter input (left) Vref(A) AD converter reference voltage VINR AD converter input (right) AD converter reference voltage N...
  • Page 96 MD-C2 FLD01 VVKBJ670GK/-1 FL Display (13G) (11G) B8 B9 (12G) B2 B3 B4 B5 B6 B7 (14G) (10G~1G) – – – – – – – – – – – – – – – – – – – – – –...

  • Page 97: 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 98 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK MD-C2 INTEGRATED CIRCUITS QK15 VSHSA1015GR-1 AC Silicon,PNP,HSA1015 GR QK16 VSKRC104M//-1 AC Digital,NPN,KRC104 M VHILA9241M/-1 AS Servo Amp.,LA9241M QK19 VS2SC2236-Y-1 AB Silicon,NPN,2SC2236 Y VHILC78622N-1 AY Servo/Signal Control, QM01 VSHE8550D//-1 AF Silicon,PNP,HE8550 D...
  • Page 99 MD-C2 PRICE PRICE DESCRIPTION DESCRIPTION PARTS CODE PARTS CODE RANK RANK T302 RCILA1064AFZZ AD AM Tracking VCCSPA1HL150J AA 15 pF,50V AC 330 µF,6.3V,Electrolytic T304 RCILB1074AFZZ AC AM Band Coverage VCEAZA0JW337M J T351 RCILI0011AWZZ AD AM IF C44~47 VCCCTV1HH101J AA 100 pF (CH),50V...
  • Page 100 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK AA 0.01 µF,50V AB 47 µF,25V,Electrolytic C821 VCEAZA1EW476M J C1713 VCKYTV1HF103Z AB 0.022 µF,50V AB 1 µF,16V C822 VCKYPA1HF223Z C1714 VCKYTV1CF105Z AB 1 µF,50V,Electrolytic AA 0.1 µF,16V C823 VCEAEA1HW105M J...
  • Page 101 MD-C2 PRICE PRICE DESCRIPTION DESCRIPTION PARTS CODE PARTS CODE RANK RANK AA 0.0047 µF,16V CS04~06 VCTYMN1CX472K J VRD-ST2CD103J AA 10 kohm,1/6W AB 0.022 µF,50V CS07 VCKYPA1HF223Z VRS-TV2AB681J AA 680 ohms,1/10W AB 47 µF,25V,Electrolytic CS08 VCEAZA1EW476M J VRD-ST2CD335J AA 3.3 Mohms,1/6W...
  • Page 102 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R1133 VRS-CY1JB100J AA 10 ohm,1/16W R1711,1712 VRS-TV2AB120J AA 12 ohms,1/10W R1134 VRS-TV2AB1R0J AA 1 ohm,1/10W R1713 VRS-CY1JB104J AA 100 kohm,1/16W R1200,1201 VRS-CY1JB104F AA 100 kohm,1/16W R1801 VRS-CY1JB271J AA 270 ohms,1/16W...
  • Page 103 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK RD111 VRD-ST2CD473J AA 47 kohms,1/6W RK25 VRD-MN2BD683J AA 68 kohms,1/8W RE51,52 VRD-RT2HD181J AA 180 ohms,1/2W RK27,28 VRD-ST2CD682J AA 6.8 kohms,1/6W RE71 VRD-ST2CD330J AA 33 ohms,1/6W RK29 VRD-MN2BD332J AA 3.3 kohms,1/8W...
  • Page 104 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK RV05,06 VRD-ST2CD102J AA 1 kohm,1/6W CW1901 ———— — Connector Ass’y,2Pin (Supplies RV07,08 VRD-ST2CD563J AA 56 kohms,1/6W at REF No.M1953) RV09,10 VRD-ST2CD102J AA 1 kohm,1/6W CW1902 ———— — Connector Ass’y,2Pin (Supplies...
  • Page 105 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK SWD26 92LSWICHT1663T J AC Switch,Key Type NSFTM0277AFFW J AC Shaft,Pickup Slide [TUNER (BAND)] (Pick Guide Shaft (A)) SWD27 92LSWICHT1663T J AC Switch,Key Type [TAPE] NSFTM0278AFFW J AC Shaft,Pickup Slide...
  • Page 106 MD-C2 PRICE PRICE DESCRIPTION PARTS CODE PARTS CODE DESCRIPTION RANK RANK CABINET PARTS LHLDZ1140AWZZ AB Guide,CD Tray LHLDZ1141AWZZ AB Support,Pitch LHLDZ1215AWZZ AH Holder,FL Display 92LCAB3013AS1 Front Panel Ass’y LHLDZ1216AWZZ AD Holder,LED, [CD DISC 201- 1 ———— — Front Panel (Not...
  • Page 107 MD-C2 PRICE PRICE PARTS CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK XJBSD30P08000 AA Screw,ø3×8mm CP-MDC2 XJBSD30P10000 AA Screw,ø3×10mm SPEAKER BOX PARTS XJBSD30P14000 AA Screw,ø3×14mm XJBSD30P18000 AA Screw,ø3×18mm XJBSF30P10000 AA Screw,ø3×10mm 92L10102PC2H00 Speaker Box Ass’y XJBSF30P12000 AA Screw,ø3×12mm 92L3121CPC2H10 J Speaker Cord Ass’y XJSSF30P10000 AA Screw,ø3×10mm...
  • Page 108 MD-C2 306-2 306-1 306-3 703x2 MK02 MK03 305x2 PWB-F Figure 11 CD MECHANISM EXPLODED VIEW – 11 –...
  • Page 109 MD-C2 406x2 406x2 PWB-K SW1930 SW1931 SW1933 SW1935 SW1932 403x2 SW1934 403x2 CW1903 M1951 M1953 M1952 408x2 Figure 12 MD MECHANISM EXPLODED VIEW – 12 –...
  • Page 110 MD-C2 CW1501 PWB-i 509x3 508x3 505x2 505x2 MD MECHANISM CW1940 PWB-L 505x3 SW1942 SW1941 507x2 128x2 SW1940 SW1943 SW1944 505x2 CW1921 127x2 127x2 501x2 129x2 CW1911 501x2 PWB-J2 112x3 507x2 PWB-J1 113x3 505x2 119x3 110x3 505x3 PWB-J3 114x3 505x2 122x3...
  • Page 111 MD-C2 616x3 614x2 616x2 620x3 620x7 620x3 PWB-C2 616x2 MD CHANGER MECHANISM 620x2 UNIT 609x2 PWB-C4 609x2 618x2 605x2 609x2 604x2 PWB-A PWB-D MOV01 607x2 PWB-B1 604x2 611x2 611x12 611x2 PWB-B2 611x2 201-7 201-5 611x2 FLD01 259x2 201-8 201-2-3 201-2...
  • Page 112 MD-C2 295-3 295-2 295-1 620x2 620x2 279x2 MECHANISM 608x2 PWB-G MK01 612x4 PWB-E SOK01 Figure 15 CABINET EXPLODED VIEW – 15 –...
  • Page 113 MD-C2 CP-MDC2 Tweeter SP3 (L-CH) Super SP4 (R-CH) Tweeter SP5 (L-CH) Capacitor SP6 (R-CH) (Supplies at Ref No.903) Black 3.3 µF/100V N.P. Black SP5,6 Woofer SP1 (L-CH) SP2 (R-CH) 908x2 Capacitor 908x2 SP3,4 904x2 905x4 Super Tweeter SP5 (L-CH) SP6 (R-CH)
  • Page 114 MD-C2 PACKING OF THE SET (FOR U.S.A. ONLY) Setting position of switches and knobs Tape Mechanism STOP MD-C2 CP-MDC2 SPAKP0032AWZZ Polyethylene Bag, Unit 92L70032002210 Polyethylene Bag, Speaker SPAKA0204AWZZ Packing Add., Unit 92L71525004400 Sheet, Speaker TLABZ0516AWZZ REAR SIDE AM Loop Antenna...

  • Page 115: Quick Guide

    MD-C2 MD MINI SYSTEM Listening to a CD / Audición de discos CD Quick Guide/Guía rápida MD-C2 Label facing up Etiqueta hacia arriba Check the supplied accessories / Compruebe los accesorios suministrados OPEN/CLOSE POWER OPEN/CLOSE AM loop antenna x 1...
  • Page 116 MD-C2 © COPYRIGHT 1999 BY SHARP COPORATION 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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