IMPOTANT SERVICE MANUAL ........................................................................................................................................ 2

SPECIFICATIONS ............................................................................................................................................................. 2

NAMES OF PARTS ........................................................................................................................................................... 3

OPERATION MANUAL ...................................................................................................................................................... 5

QUICK GUIDE ................................................................................................................................................................... 7

DISASSEMBLY .................................................................................................................................................................. 8

REMOVING AND REINSTALLING THE MAIN PARTS ................................................................................................... 12

ADJUSTMENT ................................................................................................................................................................. 15

NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 31

TYPE OF TRANSISTOR AND LED ................................................................................................................................. 31

WIRING DIAGRAM .......................................................................................................................................................... 32

BLOCK DIAGRAM ........................................................................................................................................................... 34

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ............................................................................................. 38

VOLTAGE ........................................................................................................................................................................ 68

WAVEFORMS OF CD CIRCUIT ...................................................................................................................................... 69

WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 70

TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 72

TROUBLESHOOTING (MD SECTION) ........................................................................................................................... 76

FUNCTION TABLE OF IC ................................................................................................................................................ 81

REPLACEMENT PARTS LIST/EXPLODED VIEW/PACKING OF THE SET

All manuals and user guides at all-guides.com

SERVICE MANUAL

CONTENTS

SHARP CORPORATION

- 1 -

• 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-X8

No. S0778MDX8////

MD-X8

Page

Table of Contents

Troubleshooting

Summary of Contents for Sharp MD-X8

Page 1: Table Of Contents
SERVICE MANUAL No. S0778MDX8//// MD-X8 It is the intent of Sharp that this product be used in full compliance with the copyright laws of the United States and that prior permission be obtined from copyright owners whenever necessary. US and foreign patents licensed from Dolby Laboratories Licensing Corporation.
Page 2: Impotant Service Manual
All manuals and user guides at all-guides.com MD-X8 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. IMPORTANT SERVICE NOTES 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
5.Personal Computer Mode Indicator 22 23 24 25 26 27 6.LCD Display 7.Name / TOC-Edit Button: NAME/TOC EDIT 8.Auxiliary Input (Digital/Analog / Phono) Button: AUX MD/CD STEREO MD-X8 POWER 9.Tuner Call (Band Select) Button: TUNER (BAND) 10.3D Surround Indicator CD / MD MD EDIT 11.CD Disc Trays...
Page 4 All manuals and user guides at all-guides.com MD-X8 REMOTE CONTROL 5 6 7 1.Record Mode Button: REC MODE 2.Record Button: 3.Clear Button: CLEAR 4.Program Button: PRGM 5.Play Mode Button: P-MODE 6.Synchro Record Button: SYNCHRO REC SYNCHRO AUTO MARK MODE 7.Auto Mark Button: AUTO MARK 8.Time Display Select Button:TIME...
Page 5: Operation Manual
All manuals and user guides at all-guides.com MD-X8 OPERATION MANUAL – 5 –...
Page 6 All manuals and user guides at all-guides.com MD-X8 – 6 –...
Page 7: Quick Guide
All manuals and user guides at all-guides.com MD-X8 Quick-Guide MD / CD STEREO Guía rápida MD-X8 Connection Turning the Remote control power on and off Conexión Control remoto Conexión y desconexión de la 2 "AA" batteries alimentación Dos pilas "AA"...
Page 8: Disassembly
All manuals and user guides at all-guides.com MD-X8 DISASSEMBLY STEP REMOVAL PROCEDURE FIGURE Caution on Disassembly Whe disassembling the machine or assenbling it after CD Mechanism 1. Screw ....(U1) x2 10-1 repair, observe the following instructions so as to ensure 2.
Page 9 All manuals and user guides at all-guides.com MD-X8 (C2) x1 (C3) x2 (J1) x4 ø3 x8mm (C1) x1 ø3 x8mm (D2) x2 ø3 x10mm (D1) x1 Front Panel Main PWB Sub Chassis Motor M971 (J2) x2 MD Unit ø3 x8mm...
Page 10 All manuals and user guides at all-guides.com MD-X8 (U3) x1 Push (U1) x2 (U5) x1 ø2 x7mm ø2.6 x12mm Pawl (U6) x1 (U9) x1 Spring (U7) x2 Mechanism ø2 x6mm (U2) x1 Push the pawl of disc tray with a proper screwdriver.
Page 11 All manuals and user guides at all-guides.com MD-X8 SPEAKER MD Mechanism Top Panel (A1) x1 Frame Speaker Box Front Panel Figure 11-3 (A4)x1 Front Panel (X1)x4 (A3)x4 Ø4x16mm ø1.7x8.9mm Figure 11-1 (A2)x4 MD Main PWB Speaker Cord Copper foil tape...
Page 12: Removing And Reinstalling The Main Parts
All manuals and user guides at all-guides.com MD-X8 REMOVING AND REINSTALLING THE MAIN PARTS (A1)x1 MD MECHANISM SECTION ø1.7x5mm Perform steps 1 to 3 of the disassembly method to remove the MD mechanism. (A2) How to remove the magnetic head Soldering x2 (See Fig.
Page 13 All manuals and user guides at all-guides.com MD-X8 How to remove the spindle motor (See Fig. 13-1) 1. Remove the screws (E1) x 3 pcs., and remove the spidle motor. Caution: Be careful so that the turntable is not damaged.
Page 14 All manuals and user guides at all-guides.com MD-X8 CD MECHANISM SECTION (A1) x2 ø2.6 x5mm For the procedure to remove the CD mechanism from the Stop Washer main unit, refer to Disassembling Procedure, Steps 1~10, and (A3) x1 19. (p.8).
Page 15: Adjustment
All manuals and user guides at all-guides.com MD-X8 ADJUSTMENT TUNER SECTION fL: Low-range frequency • TEST mode setting method fH: High-renge frequency Holding down the ENTER button and TUNER (BAND) button, • AM adjustment and confirmation turn on the power. Frequency is set in the memory (initial AM signal oscillator Frequency 400 Hz, 30%, AM modulation setting) as shown in Table 15.
Page 16 All manuals and user guides at all-guides.com MD-X8 CD TEST MODE CD test mode setting Any one of test mode can be set by pressing several buttons as follows. Holding down CD PLAY/PAUSE and TACK UP/CUE, turn on POWER. TEST: CD operation test...
Page 17 All manuals and user guides at all-guides.com MD-X8 MD SECTION • Note Remove the MD unit for repeir, ansd after installing it in the set, be dure to reset it and ascertain that reset has been done. Resetting procedure (1) Unplug the AC cord from the socket, and hold down the RESET buttonm provided at the rear side for more than 10 seconds.
Page 18 All manuals and user guides at all-guides.com MD-X8 • Test Mode 1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.) • The adjustment value is output with the aid of system controller interface.
Page 19 All manuals and user guides at all-guides.com MD-X8 2. AUTO adjustment mode Setting Method Step No. Remarks Display Step 1 Testmode STOP state [ t s m Step 2 Press the CD PLAY button two times. AUTO adjustment menu [ A U T O _ A J S T _ ] Step 3 Press once the MD PLAY button.
Page 20 All manuals and user guides at all-guides.com MD-X8 3. RESULT mode (final adjustment) Step No. Setting Method Remarks Display Step 1 Testmode STOP state [ t s m Step 2 Press the CD PLAY button four times. RESULT menu [ _ R E S U L T _ _ _ ] Step 3 Press once the MD PLAY button.
Page 21 All manuals and user guides at all-guides.com MD-X8 • If the VOL UP/VOL DOWN button is pressed during setting indication, the setting increases/decreases, and the new setting is stored in RAM. • If the VOL UP/VOL DOWN button is held down, the setting changes continuously with 100 ms cycle.
Page 22 All manuals and user guides at all-guides.com MD-X8 Step No. Setting Method Remarks Display Step 9 Press once the CD PLAY button. Comparison level setting in case of FOK generation [ F O K L E V f _ (when focus is "ON") Step 10 Press once the CD PLAY button.
Page 23 All manuals and user guides at all-guides.com MD-X8 Step No. Setting Method Remarks Display Step 18 Press once the CD PLAY button. TCRS comparison level 1 for high reflection [ T C R S C 1 P _ Step 19 Press once the CD PLAY button.
Page 24 All manuals and user guides at all-guides.com MD-X8 e) TEMP setting Setting Method Step No. Remarks Display Step 1 Testmode STOP state [ t s m Step 2 Press the CD PLAY button seven times. EEPROM setting menu [E E P R O M _ S E T] Step 3 Press once the MD PLAY button.
Page 25 All manuals and user guides at all-guides.com MD-X8 8. TEST-PLAY mode Setting Method Step No. Remarks Display Step 1 Testmode STOP state [ t s m Step 2 Press the CD MD EDIT button. TEST-PLAY menu [ T E S T _ P L A Y _ ] Step 3 Press once the CD STOP button.
Page 26 All manuals and user guides at all-guides.com MD-X8 11. EJECT mode Setting Method Step No. Remarks Display Step 1 Testmode EJECT state [ _ _ E J E C T _ _ _ ] Step 2 Press oncethe CD STOP button. Max. power output state...
Page 27 All manuals and user guides at all-guides.com MD-X8 EXPLANATION OF ERROR DISPLAY Error display Errors Corrective action 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 All manuals and user guides at all-guides.com MD-X8 Error display Errors Corrective action 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.
Page 29 All manuals and user guides at all-guides.com MD-X8 -PROM Data List Focus setting Slide setting Item indication Setting Item indication Setting S L G S L 2 F F 1 S L D L I M F F 2 S L D L E V...
Page 30 All manuals and user guides at all-guides.com MD-X8 -PROM Setting Mode Chart Figure 30 – 30 –...
Page 31: Notes On Schematic Diagram
All manuals and user guides at all-guides.com MD-X8 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...
Page 32: Wiring Diagram
All manuals and user guides at all-guides.com MD-X8 MD MAIN PWB-G(BOTTOM) LAMP PWB-C1 MD MECHANISM SWITCH PWB-H CNP741 CNS1901 CNP1904 FW1901 M903 SWITCH A PWB-C2 SWITCH B PWB-C3 LED PWB-C4 FW701 FW701 MD MAIN PWB-G (TOP) MD FLAT CABLE (42)
Page 33 All manuals and user guides at all-guides.com MD-X8 POWER PWB-B1 CNS1904A CNS1904B BI850 BI830 CNP1904 MD OPTICAL PICK UP UNIT FLEXIBLE PWB T801 POWER TRANSFOMER CNP261 CNS961 M971 FAN MOTOR MAGNETIC HEAD(40) POWER AMP. PWB-B2 CNP1252 CNS1903 IC201 COLOR TABLE...
Page 34: Block Diagram
All manuals and user guides at all-guides.com MD-X8 Figure 34 BLOCK DIAGRAM (1/4) – 34 –...
Page 35 All manuals and user guides at all-guides.com MD-X8 PICKUP IN SW702A M702 SLED MOTOR M701 SPINDLE MOTOR LASER DRIVER M56748FP FOCUS/TRACKING/ SPIN/SLIDE DRIVER LA9241M SL– SERVO AMP. 27 26 16.934MHz XOUT LC78623D SERVO SIGNAL CAM SWITCH VVDD SWB101 CONTROL SWB102...
Page 36 All manuals and user guides at all-guides.com MD-X8 Q353 FM/AM Q354 X351 VOLTAGE CF351 REGURATOR PHASE IF IN CF352 Q371 MONO/ST FM MONO/ST TO µ-COM STEREO FM IN AM IF XT21 AM RF IN T351 AM IN FM IF X352 4.5MHz...
Page 37 All manuals and user guides at all-guides.com MD-X8 IC905 JK902 8 MULTIPLEXER IC751~IC753 74HCU04 DIGITAL 2 INPUT LCD AMP. UNA901 IC752 SO201 DIGITAL 1 CONTROLL JK901 SPEAKER INPUT SO602 BA13058 HEADPHONES TERMINALS AC POWER SUPPLY CORD AC120V 60Hz IC605 TC7WU04F...
Page 38: Schematic Diagram / Wiring Side Of P.w.board
All manuals and user guides at all-guides.com MD-X8 MIC PWB-C7 MIC VOLUME VR601 20K(B) IC601 R611 C621 10/50 NO. VOLTAGE D615 R620 R609 1SS133 –11.1V 1.5K C615 R615 Q601 10/50 1.5K KTC3199 GR R603 10.8V MICROPHONE C603 EX_MD-R JK601 220P...
Page 39 All manuals and user guides at all-guides.com MD-X8 FM SIGNAL AM SIGNAL MAIN PWB-A(1/3) R364 C336 0.022 1.2K C342 C373 R358 R363 0.022 0.018 8.2K 1.2K VR351 AMTRACKING C371 10K(B) 1/50 L353 FM MUTE MUTING LEVEL Q353 C302 R350 KTC3199 GR 0.001...
Page 40 All manuals and user guides at all-guides.com MD-X8 MAIN PWB-A(2/3) CNP999 B A SEL MODE INPUT SELECTOR IC902 IC902 R931 BU2092F C901 100K IC904 390P NO. VOLTAGE R905 R932 NO. VOLTAGE DATA 4052A 0.2V R1071 SW12 4.7V R906 4052B 4.8V...
Page 41 All manuals and user guides at all-guides.com MD-X8 R1052 R1051 R1050 220K 2.7K IC901 NO. VOLTAGE C939 R1048 INVERTER 0.01 JK902 IC904 AUX DIGITAL 2 74HC153P INPUT R1049 4.8V ZD901 9 10 11 12 13 14 UZ5.1BSB 0.2V R1053 L905 C945 2.2µH...
Page 42 All manuals and user guides at all-guides.com MD-X8 23 24 25 MAIN PWB-A(3/3) IC522 FM SIGNAL NO. VOLTAGE CD SIGNAL C541 22/25 –10V R587 100K C573 MIC AMP. R569 IC552 R585 C575 NJM4565D 3.9K 22/50 Q553 0.6V – KTC3199 G...
Page 43 All manuals and user guides at all-guides.com MD-X8 P40 10-H 33 34 D421 1SS133 D422 L421 1SS133 R431 R429 2.2µH L421 2.2µH 2.2K L-CH C429 0.7V 330P R427 AUX OUT L423 100K R419 Q423 2.2µH 5.6K R-CH KTC3199 GR Q541, Q542 :...
Page 44 All manuals and user guides at all-guides.com MD-X8 MAIN PWB-A R1091 R949 R931 R1092 R932 R930 R928 CNP950 R350 R1067 R927 IC902 R1063 R926 R1039 Q902 C372 C367 R925 R924 R362 R1033 R917 C366 R365 C353 IC303 R1064 CNP960 C357...
Page 45 All manuals and user guides at all-guides.com MD-X8 C331 R350 T302 C367 R349 C366 C353 IC303 R399 R348 L342 R347 C333 C357 3 2 1 C399 C351 C348 R393 Q301 CF302 B C E C346 C334 C340 SO301 C349 R355...
Page 46 All manuals and user guides at all-guides.com MD-X8 NO. VOLTAGE NO. VOLTAGE CD SERVO PWB-C8 2.5V 2.5V DRIVER 2.5V LASER 2.5V 2.6V 47/10 KTA1266 GR 2.5V 4.9V 0.47/50 1.5V 4.9V 2.6V 2.5V 0.33/50 1/50 2.5V 2.5V 4.2V 0.01 2.6V 2.5V 2.6V...
Page 47 All manuals and user guides at all-guides.com MD-X8 NO. VOLTAGE 2.5V 2.5V 0.2V 2.5V R77 1K 2.5V R46 1K 2.6V R47 1K 2.6V R45 1K R78 1K CD SIGNAL R48 1K 2.6V 0.01 2.6V 2.5V 2.5V 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 5.9V...
Page 48 All manuals and user guides at all-guides.com MD-X8 MOB1 MOB2 MAIN CAM MOTOR TRAY MOTOR M971 FAN MOTOR BIM1 CNS961 TO POWER AMP. PWB TO CD SERVO PWB CNP261 CNP11 COLOR TABLE BROWN RD(R) BIM3 SWB101 CAM1 ORANGE TO MAIN PWB...
Page 49 All manuals and user guides at all-guides.com MD-X8 VR602 JK601 VR601 MICROPHONE INPUT LEVEL VOLUME JK901 PC CONTROL HEADPHONES SO602 KEYBORD INPUT SO601 C646 R650 Q601 C639 C650 ZD601 R655 5 6 7 8 1 2 3 4 D615 R644...
Page 50 All manuals and user guides at all-guides.com MD-X8 DISPLAY PWB- VSS(VD) VOUT LCD751 VDD PMODE EXA VSS CK CKS DISPLAY OSC1 OSC0 R751 680K FROM LCD751 P/S SDA SCL LAMP PWB-C1 BACK LIGHT LMP741 LMP742 LMP743 LMP744 RESB RESET VSS-TEST FROM POWER AMP.
Page 51 All manuals and user guides at all-guides.com MD-X8 PWB-C6 IC751 ~ IC753 : LCD AMP. IC751 BA10358 – TO MAIN PWB – CNP975 P40 1-B IC752 BA10358 R759 150K L751 – 4.7µH RESET TO MAIN PWB D GND CNP970 +13R5V...
Page 52 All manuals and user guides at all-guides.com MD-X8 LAMP PWB-C1 SWITCH A PWB-C2 LED772 CNP741 R792 SW789 LMP741 MD PLAY/ PAUSE C775 R788 C771 C772 C774 SW788 C773 MD STOP R776 R787 R777 LMP742 R778 VOLUME DOWN JOG701 LMP744 SW787...
Page 53 All manuals and user guides at all-guides.com MD-X8 SWITCH B PWB-C3 LED PWB-C4 R712 FW701 FW701 LED706 SW701 POWER SW707 COMPUTER NETWORK R706 LED705 RX701 REMOTE SENSOR R714 R711 SW704 SW703 SW702 CD/MD MD EDIT CD/MD MD EDIT CD/MD MD EDIT...
Page 54 All manuals and user guides at all-guides.com MD-X8 FM SIGNAL POWER AMP.PWB-B2 IC201 IC201 STK40705 NO. VOLTAGE – – POWER AMP. –34V –34V Q251 KTC3199 GR –7V 4.5V –5.6V FR202 R205 Q252 R253 KTC3199 GR –34V C205 C221 C250 R201...
Page 55 All manuals and user guides at all-guides.com MD-X8 Q271,Q272: MOTOR DRIVER RELAY RL201 R271 OUL_L R276 R272 OUL_R D203 ZD271 M971 1SS133 UZ6.2BSB D270 1SS133 MOTOR 4.5V 4.5V D271 R229 1SS133 R275 D201 3.9K 1SS133 Q252 KTC3199 GR Q297 D272...
Page 56 All manuals and user guides at all-guides.com MD-X8 POWER PWB-B1 BI850/CNS850 1 2 3 4 5 6 7 8 C891 C807 D820 R801 D814 D815 C806 C805 D813 D812 F805 1.6A L 250V T801 POWER TRANSFOMER F803 5A L 125V F802 5A L 125V T.F.
Page 57 All manuals and user guides at all-guides.com MD-X8 POWER AMP. PWB-B2 Q871 D871 D872 FR811 R873 C816 BI830/CNS830 R813 RP821 R811 R866 C888 ZD810 C817 R865 C815 R831 C818 C832 Q862 C831 C823 Q851 R820 D801 ZD820 R821 Q850 C820...
Page 58 All manuals and user guides at all-guides.com MD-X8 SITUATION : TP1141 TP1131 C1107 C1111 C1110 0.015 0.0047 0.47 TP1142 C1106 0.47 EFMAGI EFMAGC ADIPI C1119 R1155 330P & ADIPO DIFF ADLPFO DIFF C1102 TP1138 REFI 22KO IC1101 ADIP IR3R55 C1103...
Page 59 All manuals and user guides at all-guides.com MD-X8 TP1131 C1107 TP1275 0.0047 TP1142 C1106 0.47 99 98 97 96 9 ADIPI TP1274 EFMMON TP1140 C1119 R1155 AVCC 330P EFMO-I EFMO-I C1202 EFMI TP1139 99 98 ADIPO AGND AOUT-IN AOUT-IN EOUT-IN...
Page 60 All manuals and user guides at all-guides.com MD-X8 SITUATION : Waveforms should be measured by inserting the circuit, as shown in the figure. 100K Connect an oscilloscope. 270P R1211 C1208 0.047 TP1275 TP1210 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76...
Page 61 All manuals and user guides at all-guides.com MD-X8 MD MAIN PWB-G n in the figure. scilloscope. DADATA ADDATA DFCK BCLK LRCK AND GATE IC1916 74VHC08FT TP1911 R1927 CNP1904 DOUTO TP1901 DIGOUT TO MAIN TP1902 C1951 0.047 CNP961 TP1904 DIGIN P41 12 - B...
Page 62 All manuals and user guides at all-guides.com MD-X8 SITUATION : CNS1101 FLEXIBLE 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 5 4 3 2 1 L1251 47uH...
Page 63 All manuals and user guides at all-guides.com MD-X8 VREF3.2V R1401 MINF R1423 HINF TP1405 R1404 C1402 R1424 R1426 0.047 R1472 L1251 47uH R1223 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81...
Page 64 All manuals and user guides at all-guides.com MD-X8 SITUATION : IC1990 74AC04FS L1203 4.7µH INVERTOR C1711 0.01 C1716 0.01 28 27 26 25 24 23 22 21 20 REF3.2V IC1701 UDA1340 R1423 A/D,D/A CONVE C1709 0.047 R1424 1 2 3 4 5 6 7 8 9...
Page 65 All manuals and user guides at all-guides.com MD-X8 R1712 100K C1711 0.01 C1716 0.01 L3DATA 28 27 26 25 24 23 22 21 20 19 18 17 16 15 MD PLAYBACK SIGNAL IC1701 MD RECORD SIGNAL UDA1340 A/D,D/A CONVERTER 1 2 3 4 5 6 7 8 9...
Page 66 All manuals and user guides at all-guides.com MD-X8 TO MAIN PWB CNP950 FROM MAGNETIC HEAD CNS1903 MD FLEXIBLE PWB (42) CNS 1902 CNP1252 Q1820 2322 212019181716151413121110 C1251 C1252 R1251 R1827 R1939 R1463 R1459 Q1253 Q1254 C1425 R1461 R1253 C1460 R1734...
Page 67 All manuals and user guides at all-guides.com MD-X8 • Through-hole where the top, bottom and +B patterns are connected. • Through-hole where the top, bottom and ground patterns are connected. • Through-hole where the top, and bottom patterns are connected.
Page 68: Voltage
All manuals and user guides at all-guides.com MD-X8 VOLTAGE (MD MAIN PWB) IC1916 IC1202 Q1801 IC1201 IC1401 IC1601 IC1907 NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE NO. VOLTAGE VOLTAGE NO. VOLTAGE NO. VOLTAGE 1.58V 1.25V 1.1V 1.48V 2.8V 3.2V 1.1V...
Page 69: Waveforms Of Cd Circuit
All manuals and user guides at all-guides.com MD-X8 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...
Page 70: Waveforms Of Md Circuit
All manuals and user guides at all-guides.com MD-X8 WAVEFORMS OF MD CIRCUIT PLAY STATE PIT PLAY Stopped Stopped NORM: 100M S/s NORM: 1M S/s 1997 / 08 / 04 09:30:15 1997 / 08 / 04 13:35:24 CH1 500mV 200mV 500ns/div...
Page 71 All manuals and user guides at all-guides.com MD-X8 PLAY Stopped Stopped NORM: 1k S/s NORM: 100M S/s 1997 / 08 / 04 14:19:52 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...
Page 72: Troubleshooting (Cd Section)
All manuals and user guides at all-guides.com MD-X8 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 73 All manuals and user guides at all-guides.com MD-X8 • The CD operation keys work. Check the FOCUS-HF system. Playback can be performed without a disc. Does the pickup move up and down two twice? Focus search OK Does the output waveform of IC1 pin 16 (FD) match that Check the area around IC5 to CNP2.
Page 74 All manuals and user guides at all-guides.com MD-X8 • Check the tracking system. Check the waveform of IC1 pin 7 (TE). The waveform shown in Figure 74-1 Check the periphery of IC1 pin 8 to pin Tracking servo is inoperative.
Page 75 All manuals and user guides at all-guides.com MD-X8 • 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.
Page 76: Troubleshooting (Md Section)
All manuals and user guides at all-guides.com MD-X8 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.
Page 77 All manuals and user guides at all-guides.com MD-X8 • Disc loading is not normal. Is disc loaded when it is inserted? Check CNP1601 and SW1956. Is the pin 4 of CNP1601 set to L state? Is change observed on the pin 23 or 24 of IC1601? Check IC1401.
Page 78 All manuals and user guides at all-guides.com MD-X8 • 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?
Page 79 All manuals and user guides at all-guides.com MD-X8 • 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.
Page 80 All manuals and user guides at all-guides.com MD-X8 • Disc motor fails to run Does waveform appear on the pins 24 and 25 of IC1201 in the Check soldering joint and parts of pins 24 and 25 of IC1201, and peripheral circuit.
Page 81: Function Table Of Ic
All manuals and user guides at all-guides.com MD-X8 FUNCTION TABLE OF IC IC901 RH-iX2679AFZZ:System Control Micon (iX2679AF) (1/3) Port Name Input/Output Pin No. Terminal Name Function RESET Output Reset signal for MD microcomputer S-ID Output Track mark signal and MD ON/OF control signal for MD...
Page 82 All manuals and user guides at all-guides.com MD-X8 IC901 RH-iX2679AFZZ:System Control Micon(iX2679AF) (2/3) Port Name Input/Output Pin No. Terminal Name Function TRAY SW-A P124 Input Main tray OPEN completion detection switch input H: OPEN completion state when SW is OFF.
Page 83 All manuals and user guides at all-guides.com MD-X8 IC901 RH-iX2679AFZZ:System Control Micon(iX2679AF) (3/3) Port Name Input/Output Pin No. Terminal Name Function COIN Output Serial output of command data to CD DSP CQCK SCK0 Output Serial clock output to CD DSP...
Page 84 All manuals and user guides at all-guides.com MD-X8 IC901 RH-iX2679AFZZ:System Control Micon(iX2679AF) MIC detection and DSTB port replacement (EX MD) SW1 DUBB MODE (EX MD) SW2 STOP DSTB input must be through INTP6 interruption port. (EX MD) SW3 SKIP +1 P06->INTP6;...
Page 85 All manuals and user guides at all-guides.com MD-X8 IC1101 VHiiR3R55//-1:RF Signal Processor (IR3R55) Function Terminal Name Pin No. RF signal input terminal 1 Input of RF signal output of pickup RF signal input terminal 2 Input of RF signal output of pickup...
Page 86 All manuals and user guides at all-guides.com MD-X8 IC1201 VHiLR37648/-1:ENDEC (LR37648) (1/2) Input/Output Function Terminal Name Pin No. EFMMON Output EFM monitor output AVCC — Analog power EFMI Input EFM signal input from RF amp. AGND — Analog GND Input...
Page 87 All manuals and user guides at all-guides.com MD-X8 IC1201 VHiLR37648/-1:ENDEC (LR37648) (2/2) Input/Output Function Terminal Name Pin No. TESO1 Output PLLLR. Microcomputer extension output port 2 in case of selection TESO3 In/Output PLLOSC. Microcomputer extension output port 3 in case of selection...
Page 88 All manuals and user guides at all-guides.com MD-X8 IC1401 RX-iX0227AWZZ:MD System Micon Control (IX0227AW) (1/2) Input/Output Function Terminal Name Pin No. P96/ANEX1 Output Input/Output it port P96 P95/ANEX0 Output Input/Output it port P96 P94/DA1 Output LDVAR (laser power adjustment output)
Page 89 All manuals and user guides at all-guides.com MD-X8 IC1401 RX-iX0227AWZZ:MD System Micon Control (IX0227AW) (2/2) Input/Output Function Terminal Name Pin No. P42/A18 In/Output SYS D2 (data bus 2) P41/A17 In/Output SYS D1 (data bus 1) P40/A16 In/Output SYS D0 (data bus 0)
Page 90 All manuals and user guides at all-guides.com MD-X8 IC1101 VHiiR3R55//-1:RF Signal Processor (IR3R55) 48 47 46 45 44 43 42 41 40 39 38 37 ADIPI ADIPO DIFF DIFF ADLPFO ADIP REFI 22KO REFO 22KI BIAS RFADD TCGI TCGO AOUT...
Page 91 “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 92 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK INTEGRATED CIRCUITS Q841 VS2SD2012//-1 AD Silicon,NPN,2SD2012 Q850 VSKTC3199GR-1 AB Silicon,NPN,KTC3199 GR VHILA9241M/-1 AS Servo Amp.,LA9241M Q851 VS2SD2012//-1 AD Silicon,NPN,2SD2012 VHILC78623D-1 AY Servo/Signal Control,LC78623D...
Page 93 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK AB 4.7 µF,25V,Electrolytic T801 RTRNP0169AWZZ J BT Power RC-EZY475AF1E AA 0.022 µF,25V VCTYMN1EF223Z COILS AB 0.1 µF,16V VCTYPA1CX104K AA 0.022 µF,25V VCTYMN1EF223Z AC 0.82 µH...
Page 94 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK AB 1 µF,50V,Electrolytic C393 RC-GZA105AF1H C701 VCKYMN1HB101K J AA 100 pF,50V AB 47 µF,16V,Electrolytic AB 1 µF,50V,Electrolytic C394 RC-GZA476AF1C C702 RC-GZA105AF1H AA 0.022 µF,25V...
Page 95 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK AA 0.0047 µF,50V C1107 VCKYTV1HB472K VRD-SA2CD0R0J AB 0 ohm,Jumper,ø1.9×3.4mm,Red AD 1 µF,6.3V C1109 VCKYTV0JB105K VRD-ST2CD0R0J AA 0 ohm,1/6W,Jumper AC 0.47 µF,16V C1110...
Page 96 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R227,228 VRD-ST2EE4R7J AA 4.7 ohms,1/4W R453,454 VRD-ST2CD222J AA 2.2 kohms,1/6W R229,230 VRD-ST2CD563J AA 56 kohms,1/6W R455~458 VRD-MN2BD392J AA 3.9 kohms,1/8W R239,240 VRD-ST2EE331J...
Page 97 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK R751 VRD-MN2BD684J AA 680 kohms,1/8W R957 VRD-ST2CD102J AA 1 kohm,1/6W R752 VRD-ST2CD104J AA 100 kohm,1/6W R958 VRD-MN2BD103J AA 10 kohm,1/8W R753 VRD-ST2CD124J...
Page 98 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK R1409 VRS-CY1JB102J AA 1 kohm,1/16W R1927 VRS-TV2AB220J AA 22 ohms,1/10W R1412 VRS-CY1JB104J AA 100 kohm,1/16W R1939 VRS-CY1JB102J AA 1 kohm,1/16W R1413 VRS-CY1JB332J AA 3.3 kohms,1/16W...
Page 99 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK CNS2A/B QCNWN0859AWZZ J AF Connector Ass’y,7/7Pin SW784 QSW-K0005AWZZ J AC Switch,Key Type CNS3A/B QCNWN0857AFZZ J AK Connector Ass’y,6/6Pin [Multi Control Up] CNS950/A/B QCNWN0959AWZZ J AS Connector Ass’y,8/2/6Pin...
Page 100 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE PART CODE DESCRIPTION PARTS CODE DESCRIPTION RANK RANK M903 RMOTV0014AWM1 J AQ MD Loading Motor Ass’y SWB108 QSW-P0920AFZZ AC Switch,Push Type [CD Set] SW1952A/B QSW-P0006AWZZ J AG Switch,Push Type CABINET PARTS...
Page 101 All manuals and user guides at all-guides.com MD-X8 PRICE PRICE DESCRIPTION PARTS CODE DESCRIPTION PART CODE RANK RANK MSPRD0108AWFJ J AC Spring,Fan Motor NBRGC0003AWZZ J AC Bearing Metal LX-BZ0880AFZZ AC Screw,ø2×2mm XBPSD30P10KS0 AA Screw,ø3×10mm XEBSD26P10000 AA Screw,ø2.6×10mm XEBSD30P10000 AA Screw,ø3×10mm LX-HZ0087AFFD AA Screw,ø3×8mm...
Page 102 All manuals and user guides at all-guides.com MD-X8 CNS1903 SW1956 PWB-H SW1953 1952A/B SW1955 SW1954 603x2 FW1901 CNS1904 603x2 PWB-G 612x4 M902 M903 M901 606x3 Figure 11 MD MECHANISM EXPLODED VIEW – 11 –...
Page 103 All manuals and user guides at all-guides.com MD-X8 306-2 306-1 306-3 703x2 M701 M702 305x2 SW702A PWB-D Figure 12 CD MECHANISM EXPLODED VIEW – 12 –...
Page 104 All manuals and user guides at all-guides.com MD-X8 CD Mechanism 805x4 803x2 804x3 104 105 801x2 111x2 110x2 108x3 108x3 SWB101 PWB-F ~104 MOB1 108x3 123x4 MOB2 80mm Figure 13 CHANGER MECHANISM EXPLODED VIEW – 13 –...
Page 105 All manuals and user guides at all-guides.com MD-X8 PWB-B3 MD Mechanism Unit 610x2 602x2 M971 611x5 604x6 PWB-C4 606x2 PWB-C3 604x3 261x2 263x2 601x2 609x2 262x2 PWB-C6 602x2 604x7 604x2 JOG701 604x10 PWB-C5 LCD751 611x2 PWB-C1 611x2 PWB-C2 604x2 603x2...
Page 106 All manuals and user guides at all-guides.com MD-X8 TWEETER SP3 (L-CH) SP4 (R-CH) 3.3µF, 100V, Film Capacitor WOOFER SP1 (L-CH) SP2 (R-CH) 912x2 SPEAKER TERMINAL (905) SP3 (L-CH) SP4 (R-CH) 911x4 910x4 906x4 TWEETER SP3 (L-CH) SP4 (R-CH) SPEAKER SP1 (L-CH)
Page 107 All manuals and user guides at all-guides.com MD-X8 PACKING OF THE SET SSAKH0022AWZZ SPAKA0133AWZZ Polyethylene Bag, Unit L Mark Packing Add., Left/Right TLABN0001AWZZ Label, Serial Month AM Loop Antenna R Mark FM Antenna Speaker Cord Operation 92L411-0086 Manual 92L412-0088 Polyethylene Bag,...
Page 108 All manuals and user guides at all-guides.com MD-X8 © COPYRIGHT 1997 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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