Sharp MD-MS721H, Service Manual

Page 1: ...S SERVICE MANUAL SHARP CORPORATION No SX887MDMS722H This document has been published to be used for after sales service only The contents are subject to change without notice In the interests of user safety the set should be restored to its original condition and only parts identical to those specified be used Note for users in UK Recording and playback of any material may require consent which SH...

Page 2: ...tect your eyesagainst exposure to the laser Warning of possible eye damage when repairing If the AC adaptor or batteries are connected when the top houising disc cover of the unit is removed and the PLAY key is pressed the laser will light up during docus access 2 3 seconds Fig 2 1 During the operation the laser will lesk from the opening btween the magnetic head and the mechanical chassis Fig 2 2...

Page 3: ...icator 13 Disc Name Indicator 14 Track Name Indicator 15 Remaining Recording Time Indicator 16 Total Track Number Display 17 Jog Dial 18 Record Track Mark Button 19 Volume Name Select Buttons 20 Display Lowercase Characters Button 21 Character Button 22 Volume Name Select Buttons 23 Play Pause Button 24 Fast Reverse Fast Forward Recording Level Control Cursor Shuttle Switch 25 Edit Auto Mark Time ...

Page 4: ...ame Indicator 13 Track Name Indicator 14 Remaining Recording Time Indicator 15 Total Track Number Display 16 Mode Insert Button 17 Record Track Mark Button 18 Fast Reverse Recording Level Control Cursor Button 19 Play Pause Button 20 Fast Forward Recording Level Control Cursor Button 21 Display Lowercase Characters Button 22 Volume Name Select Buttons 23 Volume Name Select Buttons 24 Bass Delete B...

Page 5: ...y indicator will flash Recharge the battery or replace the alkaline battery with a new one When the battery has run completely out BATT EMPTY main unit and Lo BATT remote control unit will appear Then the power will be disconnected automatically Notes When you are using the unit with a re chargeable battery and an alkaline battery and you want to check the remaining ca pacity of the battery the re...

Page 6: ...dental erasure Is the unit connected properly to the other equipment Is the AC adaptor unplugged or did a power failure occur whilst recording or editing Is the unit in the safety mode Is an optical signal being output from the external equipment Read the operation manual for the external equipment Even if the maximum recording time of a MiniDisc has not been reached DISC FULL or TOC FULL may be d...

Page 7: ...move the MiniDisc NO DISC A disc has not been loaded Load a disc PB DISC PROTECTED The disc is write protected You tried to record on a playback only disc Move the write protection knob back to its original position Replace it with a recordable disc POWER Improper power is being supplied Use one of the specified power sources SORRY SORRY Since a track number is currently being located or written t...

Page 8: ...2 ø1 4x2mm B1 x1 ø1 4x2mm B1 x2 ø1 4x2mm Bottom Cabinet Top Cabinet Center Cabinet A1 x1 Pull C1 x1 ø1 7x2 5mm C1 x1 ø1 7x2 5mm B2 x1 C3 x3 B2 x1 Top Cabinet Pull Pull Pull Pull Pull Pull C2 x1 Flexble PWB for optical pickup C2 x1 C3 x1 Main PWB Put the fold on the connector and apply with the felt Sagging may result in contact with the sheet metal Felt Mechanism Unit ø1 4x2 5mm Figure 9 3 Caution...

Page 9: ...emove the solder joint B1 x 2 of slide motor lead wire 2 Remove the screw B2 x 1 pc and remove the flexible PWB 3 Remove the screw B3 x 1 and remove the lift motor Note Take care so that the motor gear is not damaged If the gear is damaged noise is caused How to remove the sled motor See Fig 10 3 1 Remove the stop washer C1 x 1 pc and remove the drive gear C2 x 1 pc 2 Remove the screw C3 x 2 pc 3 ...

Page 10: ...rm manfully the preliminary adjustment Error rate indication jump test Continuous playback is performed error rate display jump test 5 RESULT 1 Mode The value adjusted in AUTO1 or MANUAL1 is indicated Execution in servo OFF state 6 RESULT 2 Mode The value adjusted in AUTO 2 or MANUAL 2 is indicated Adjustment value is changed manually error rate display jump test 7 TEST PLAY Mode Continuous playba...

Page 11: ...e VOL UP button is pressed during setting indication the setting increases If the VOL DOWN button is pressed the setting reduces And then the new setting is stored in the RAM When the VOL UP DOWN button is held down the setting changes continuously one cycle being 100 ms If the STOP button is pressed during RESULT1 menu or measurement value indication or set value indication the state is changed t...

Page 12: ...bled if the premastered disc or disc is in miserase protected state 9 NORMAL Mode When the STOP button is pressed while the NORMAl menu appears the mode changes to the TEST mode stop state Indication during operation Indication of memory capacity on main unit LCD Level meter Internal mode Address Cluster section Address Sector section Selection of sound volume BASS etc is possible without indicati...

Page 13: ...en in EEPROM turn off power 15 Restore protection of EEPROM Disconnect connection made in Step 2 above 2 Temperature reference setting method 1 Measurement calculation and setting procedure 1 Set the TEST mode Set TEST 1 0 01 and turn on power or set PLAY ON in standby state 2 Start the EEPROM mode Temp menu Key operation in order of BASS SKIP DOWN x 2 times PLAY PLAY in the test mode STOP state T...

Page 14: ...C T 1 _ 9 5 H C T 2 _ 4 0 H C T 3 _ 3 0 H R C 0 _ C 0 H R C 1 _ F E H S Y C _ A 6 H P W C _ 1 2 H P W L _ 6 6 H D R 1 _ 4 9 H D R 2 _ 4 9 H I N 1 _ D 4 H I N 2 _ 7 1 H I N H _ 6 4 H D R H _ 7 4 H P L E _ 9 6 H R C E _ 5 4 H E L T _ 7 2 H S L T _ 7 3 H S P M _ 0 0 H M S L _ 0 0 H U S 0 _ 0 0 H U S 1 _ 0 0 H U S 2 _ 0 0 H Item display Set values F G _ _ 6 3 H F F 1 _ 7 0 H F F 2 _ E 8 H F Z H _ E D ...

Page 15: ... A N U 1 ATT manual adjustment menu M A N U 2 Error history display menu E D A T A Test mode normal playback menu N O R M A L Preautomatic Adjustment menu Preadjustment error adjustment value output During preadjustment adjustment Adjustment error Normal end Preadjustment normal end adjustment value output During ATT automatic adjustment PLAY PLAY A U T O 1 Preautomatic Adjustment A D J O K A D J ...

Page 16: ...ntative measurement Measurement value E signal offset EINO tentative measurement Measurement value F signal offset FINO tentative measurement Measurement value Laser On Play Power RF side focus gain coarse adjustment Gain setting A ATT focus tentative setting ATT setting B ATT focus tentative setting ATT setting RF side pit section tracking gain adjustment Gain setting Pit section adjustment COUT ...

Page 17: ... SKIP DOWN E H SKIP UP SKIP DOWN F H SKIP UP SKIP DOWN T H SKIP UP SKIP DOWN A L SKIP UP SKIP DOWN B L SKIP UP SKIP DOWN E L SKIP UP SKIP DOWN F L SKIP UP SKIP DOWN Temperature code displayATT manual adjustment menu Temperature code display Temperature code Laser ON Play Power Pit section E ATT tracking setting ATT setting Pit section E ATT tracking setting ATT setting High reflection A ATT focus ...

Page 18: ... SKIP UP SKIP DOWN A L SKIP UP SKIP DOWN B L SKIP UP SKIP DOWN E L SKIP UP SKIP DOWN F L SKIP UP SKIP DOWN T H SKIP UP SKIP DOWN P T G SKIP UP SKIP DOWN G T G SKIP UP SKIP DOWN R C G SKIP UP SKIP DOWN R F G SKIP UP SKIP DOWN P C H SKIP UP SKIP DOWN G C H SKIP UP SKIP DOWN S A SKIP UP SKIP DOWN Continued to the next page SKIP UP SKIP DOWN B ATT focus initial setting E ATT tracking initial setting F...

Page 19: ...d in the continued playback mode jump of specified number of lines occurs in the external periphery direction If the key is held down jump occurs continuously 100 ms cycle When the SKIP DOWN key is pressed in the continuous playback mode jump of specified number of lines occurs in the internal periphery direction If the key is held down jump occurs continuously 100 ms cycle Continuous record menu ...

Page 20: ... When the STOP key is pressed in specific menu the TEST MODE STOP state is set Error history display menu Error history 0 display Error code Error history 1 display Error code Error history 2 display Error code Error history 3 display Error code Error history 4 display Error code Error history 5 display Error code Error history 6 display Error code Error history 7 display Error code Error history ...

Page 21: ...UP SKIP DOWN B S 3 SKIP UP SKIP DOWN When the STOP key is pressed in specific menu the TEST MODE STOP state is set When the DISP key operation is performed in the specific state the menu changes to TEMP SETTING menu In the specific state the setting changes in the range of 00h to FFh when the VOL UP DOWN key is pressed The upper limit varies depending on the items Focus setting menu PLAY F o c u s...

Page 22: ...pending on the items S C o SKIP UP SKIP DOWN S C t SKIP UP SKIP DOWN S C m SKIP UP SKIP DOWN C L p SKIP UP SKIP DOWN C L v SKIP UP SKIP DOWN J P i SKIP UP SKIP DOWN K 1 0 SKIP UP SKIP DOWN Spin setting menu PLAY S p i n Spin Setting S P G S P i SKIP UP SKIP DOWN S P m SKIP UP SKIP DOWN S P o SKIP UP SKIP DOWN S P 1 SKIP UP SKIP DOWN S P 2 SKIP UP SKIP DOWN S P 3 SKIP UP SKIP DOWN S P 4 SKIP UP SKI...

Page 23: ...ue PLAY T e m p TEMP Setting T M T p i n SKIP UP SKIP DOWN When the STOP key is pressed in specific menu the TEST MODE STOP state is set When the DISP key operation is performed in the specific state the menu changes to TEMP SETTING menu In the specific state the setting changes in the range of 00h to FFh when the VOL UP DOWN key is pressed Adjustment setting menu PLAY A D J S E T Adjustment Setti...

Page 24: ... state the menu changes to TEMP SETTING menu In the specific setting display state the setting change digit changes when the P MODE key is pressed 1st digit initial value 2nd digit P MODE P MODE In the specific state the setting changes in the range of 0h to Fh when the VOL UP DOWN key is pressed Control setting menu PLAY C T R L Control Setting C T 0 C T 1 SKIP UP SKIP DOWN C T 2 SKIP UP SKIP DOW...

Page 25: ...N SKIP UP SKIP DOWN U S 1 U S 2 When the STOP key is pressed in specific menu the TEST MODE STOP state is set When the DISP key operation is performed in the specific state the menu changes to TEMP SETTING menu In the specific setting display state the setting change digit changes when the P MODE key is pressed 1st digit initial value 2nd digit P MODE P MODE In the specific state the setting chang...

Page 26: ...E CONTORL J801 DC IN 4 5 5V 2 9 4 1V 3 4V VCC VCC 2 35 DISPLAY UNIT OPERATION UNIT IC901 3 PHASE BRUSHLESS DRIVER BA6965AF IC703 AUDIO AMP IR3R54N IC701 AUDIO AMP IR3R54N IC601 PWM DRIVER 17A39TD VM VCC IC402 EEPROM S29L294A 4 5 VCC VS IC202 16BIT D RAM IX2723AF 2 5 2 5 4 5 OPTICAL IN UNIT J701 DIGITAL INPUT J701 LINE INPUT J702 MIC IN READY FOR PLUG IN POWER J703 HEAD PHONES LINE 1 6 19 20 17 13 ...

Page 27: ...98 99 100 8 7 6 5 4 3 2 1 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 26 27 27 28 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 48 49 49 50 50 51 525354 5556 57 58 59 60 61 6263 64 6566 67 9 8 7 6 5 4 3 2 1 CN101 22 21 20 19 18 17 16 15 14 13 12 11 10 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1615 14 1312 1110 9 8 7 6 5 4 3 2 1 CN601 M903 LIFT MOTOR PH901 G...

Page 28: ... 47 48 48 49 49 50 50 51 525354 5556 57 58 59 60 61 6263 64 6566 67 6869 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 98 99 99 100 100 8 7 6 5 4 3 2 1 4 1 R481 36K R482 18K IC771 TK71225M 5 4 3 2 1 C605 0 1 TP610 C600 22 6 3 L600 2 2 C773 0 22 C774 1 C 0 C507 10 6 3 R500 4 7 C506 0 001 C505 0 001 R P RESET RKEY HDON PCNT1 PHOLD SYD7 SYRS SYRD SYWR SYD6 SYD...

Page 29: ... C502 0 0022 C501 0 0022 C504 3 3 10 C503 3 3 10 TP500 L500 22µH C508 1 C500 10 6 3 IC501 AK4519VF AD DA CONVERTER C722 3 3 10 C760 0 027 TP704 TP702 TP707 R715 100K R716 100K C734 0 1 16 C733 0 1 16 C754 1 R729 2 7K R730 2 7K C759 0 027 TP807 L851 4 7µH IC851 CPH3403 C856 1 16 C854 0 01 R857 100K D851 RB521S30 D852 F1J2F C857 10 CH L852 10µH C853 10P R853 330K R854 0 2M D861 F10J2E L861 4 7µH C86...

Page 30: ... 0V 0V 0V 0V 0V 0V 0V 1 2 3 4 5 6 7 8 9 10 IC651 VOLTAGE NO PIN 0V 0 24V 0V 0V 0 73V 0 73V 1 2 3 4 5 6 IC801 VOLTAGE NO PIN 0V 0V 2 35V 0V 0V 2 35V 0V 0 91V 2 5V 0V 0 91V 2 35V 0V 4 54V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 IC351 VOLTAGE NO PIN 1V 2 5V 1 27V 0V 1 27V 1 27V 1 27V 1 27V 126V 2 2V 1 43V 2V 0V 0V 0V 0V 1V 0V 0V 0V 0V 0V 0V 0V 0V 1 58V 0 87V 0 87V 1 73V 1 1V 2 5V 0 6V 0 8V 1 9V 0 9V 1 29V 1...

Page 31: ...202 L202 1 6 7 12 13 18 19 24 L201 C201 IC201 C212 R222 C211 C422 C203 R204 C204 IC601 L601 L602 L603 L604 C604 C622 1 5 10 15 18 19 20 25 30 35 36 L651 C651 C603 L600 C600 C602 C601 R455 R456 R457 R426 C605 IC651 R425 R452 R454 R451 R453 R458 C837 D836 L771 C826 C803 C505 C506 R207 L204 XL201 C774 IC771 C773 1 1 3 4 5 5 10 12 13 15 20 24 L500 C500 C508 C507 R500 J701 OPTICAL LINE IN J702 MIC IN R...

Page 32: ... R412 CN601 R903 R401 1 11 10 15 20 5 R901 R902 C907 C906 C905 R904 R404 R411 C354 C910 C130 C106 C107 C110 R423 C109 R422 SW402 HOLD C854 R860 R813 R756 R757 C760 C813 R832 R848 R845 R846 R819 R762 R770 R761 1 5 10 12 13 15 20 24 R857 R826 C859 R855 R854 D431 C712 R769 R712 R711 IC841 CN482 IC703 C753 R763 D841 D842 C765 D843 R849 R909 P34 6 H P34 4 E G P34 6 C P34 1 C TP115 TP105 TP108 TP106 TP1...

Page 33: ...M901 SPINDLE MOTOR M903 LIFT MOTOR SW902 DISC PROTECT MECHA FLEXIBLE PWB UNIT 8 MAGNETIC HEAD FLEXIBLE PWB 23 MAGNETIC HEAD 32 KEY FLEXIBLE PWB ASS Y 248 KEY FLEXIBLE PWB ASS Y 248 CN101 BK RD SW901 DISC IN TO MAIN PWB P33 11 H CN601 TO MAIN PWB P33 12 E CN451 TO MAIN PWB P33 12 E CN451 TO MAIN PWB P33 11 B LCD 249 CN482 MD MS722H MD MS721H ...

Page 34: ...to electro lytic capacitor the expression capacitance withstand volt age is used CH TH RH UJ Temperature compensation ML Mylar type The indicated voltage in each section is the one measured by Digital Multimeter between such a section and the chas sis with no signal given Parts marked with are important for maintaining the safety of the set Be sure to replace these parts with specified ones for ma...

Page 35: ... CH1 0 000V CH2 0 00V Main 1K Zoom 1K CH3 0 00V CH4 0 00V Trigger Mode AUTO Type EDGE CH1 Detay 0 0ns Hold OFF MINIMUM T TP201 EFM Stopped CH1 2V DC 10 1 500ms div 500ms div 1 MORM 200MS s 9 1994 12 15 08 57 26 Filter Offset Record Length Smoothiing OFF BW FULL CH1 0 00V CH2 0 00V Main 10K Zoom 10K CH3 0 000V CH4 0 0V Trigger Mode NORMAL Type EDGE CH1 Detay 0 0ns Hold OFF MINIMUM T TP201 EFM TP210...

Page 36: ...aning tissue and a small amount of isopropyl alcohol Do not touch the lens with the bare hand Is the power supply turned on when the remote control button or main unit button is pressed No Perform the check stated in item Power is not turned on when the PLAY button is pressed Perform the check stated in item Abnormal display No Yes Does the display operate normally Is playback state set Yes Perfor...

Page 37: ...k time display advance Yes Position check in INNER mode Check IC201 and IC202 connection line Is the lead in photointerrupter set to OFF when the optical pickup moves to the innermost periphery in NORMAL mode Is TP660 in H level Check the lead in photointerrupter mechanical flex PWB soldering and CNS601 connection No Ia an attempt to repeat repeatedly the TOC part performed on the low reflection d...

Page 38: ...eck whether disc is record inhibited No Does the RF waveform of TP201 appear when playback is Does level of pins 34 of IC401 and pin 17 of IC101 change depending on record and playback Is RF pattern output from IC201 pin 50 Yes No Check for soldering failure of IC201 No Check periphery of IC401 and IC101 Check whether there is any damage in IC101 periphery of laser diode Yes Check for defects of I...

Page 39: ...CPGI Input Microphone plug insertion detection input 34 PC2 _INPGI Input Line digital plug insertion detection 35 PC3 INPGCK Input Line digital plug type detection 36 PC4 RCPCNT Output Record circuit power control output 37 PC5 TEST1 Input Test mode setting input 1 38 PC6 TEST0 Input Test mode setting input 0 39 PC7 JPNP Input Kana conversion Kana input existence nonexistence discrimination 40 Vcc...

Page 40: ...80 AN1 PLVDCI Input DC jack voltage detection input 81 AN2 PLVINN Input Lithium battery voltage detection input 82 AN3 RKEY Input Remote control key operation detection input 83 AN4 HKEY1 Input Unit key operation detection input 1 84 AN5 HKEY2 Input Unit key operation detection input 2 85 AN6 TEMP Input Ambient temperature detection input 86 DA1 LDVAR Output P U laser power setting output 87 AVss ...

Page 41: ...VC MF Cylindrical type without lead wire VC MN Cylindrical type without lead wire VC TV Square type without lead wire VC TQ Square type without lead wire VC CY Square type without lead wire VC CZ Square type without lead wire VC J The 13th character represents capacity difference J 5 K 10 M 20 N 30 C 0 25 pF D 0 5 pF Z 80 20 If there are no indications for the electrolytic capacitors error is 20 R...

Page 42: ...100mA L456 458 RCILC0353AFZZ J AB Tip Solid Induction 100mA L491 VPBNN4R7M0000 J AC 4 7 µH L500 VPCBM220K0000 J AC 22 µH L600 RCILC0331AFZZ J AC 2 2 µH Choke L601 604 RCILC0358AFZZ J AC 4 7 µH Choke L608 RCILC0359AFZZ J AC 100 µH Choke L609 610 RCILC0358AFZZ J AC 4 7 µH Choke L651 VPBNNR47M0000 J AC 0 47 µH L702 703 RCILC0353AFZZ J AB Tip Solid Induction 100mA L704 RCILC0352AFZZ J AB Tip Impeder 1...

Page 43: ... J AA 390 kohms 1 16W R106 VRS CY1JB563J J AA 56 kohms 1 16W R154 VRS CY1JB122J J AA 1 2 kohms 1 16W R161 VRS CY1JB122J J AA 1 2 kohms 1 16W R204 VRS CY1JB102J J AA 1 kohm 1 16W R205 VRS CY1JB684D J AA 680 kohms 1 16W R206 VRS CY1JB274D J AA 270 kohms 1 16W R207 VRS CY1JB681J J AA 680 ohms 1 16W R222 VRS CY1JB105J J AA 1 Mohm 1 16W R351 VRS CY1JB4R7J J AA 4 7 ohms 1 16W R361 VRS TQ2BB150J J AA 15 ...

Page 44: ...B Spring Eject Lever 23 QPWBH0327AFZZ J AG Magnetic Head Flexible PWB 25 MLEVF2625AFM1 J AK Lift Lever Ass y 27 MLEVF2626AFFW J AD Lever Lift Joint 28 MLEVF2627AFFW J AE Lever Lift 29 MSPRD1360AFFJ J AC Spring Lift Lever 30 LANGF1588AFFW J AD Bracket Pickup 32 RCILH0110AFZZ J AM Magnetic Head 502 LX JZ0154AFZZ J AA Screw ø1 4 2 8mm 503 LX BZ0823AFZZ J AA Screw ø1 4 1 2mm 504 LX WZ9290AFZZ J AA Was...

Page 45: ...CUSG0681AFZZ J AB Cushion C MS721H Only 262 PFLT 1143AFZZ J AB Felt MS721H Only 263 PSHEZ0999AFZZ J AB Sheet LCD Flexible MS722H Only 264 PSHEZ1004AFZZ J AB Sheet Volume Knob MS721H Only 265 TLABS0497AFZZ J AD Caution Laser 266 TLABS0503AFZZ J AC Label Laser 601 LX BZ0877AFF3 J AA Screw ø1 4 1 5mm 602 LX CZ0107AFFF J AA Screw ø1 2 2 5mm MS721H Only 603 LX CZ0126AFFF J AA Screw ø1 4 2mm 604 LX BZ08...

Page 46: ... G H 1 2 3 4 5 6 Figure 5 MD MECHANISM EXPLODED VIEW 5 1 2 7 509 3 12 6 5 20 4 23 30 518x2 514 514 506 8 503 11 13 504 29 15 18 16 505 M903 M902 M901 28 503x2 502x3 32 511x2 508 508 8 4 8 1 8 2 SW901 8 3 SW902 9 25 515 27 516 517 ...

Page 47: ...2 219 216 201 2 601 201 5 603 201 1 201 601 201 4 201 3 220 226 256 208 207 601 210 209 205 206 607 606x2 202 1 223x2 202 2 202 225x2 222 234 225x2 606 601 604 228x2 604 204 4 204 1 204 2 204 3 606 606x2 606x2 602 605 204 218 218 266 265 261 231 232 233 246 252 221 MS722 MS721 253 249 254 239 238 241 237 248 264x3 202 260x2 202 1 202 2 259 255 246 262 263 MD MECHANISM MS721H ONLY MS721H ONLY ...

Page 48: ...SAKP0116AFZZ 15 Service Card TCADS0085AFZZ 16 Spacer Operation Manual SPAKZ0475AFZZ 17 Packing Add Unit SPAKZ0498AFZZ 18 Packing Add Unit SPAKZ0509AFZZ 7 1 Battery Case GCASZ0086AFSA 2 Connecting Cord RCA Type QCNWG0382AFZZ 3 AC Adaptor RADPA8487AFZZ 4 Headphones RPHoH0176AFZZ 5 Remote Control RRMCW0038AFSA 6 Packing Add SPAKA2679AFZZ 7 Packing Case SPAKC6671AFZZ 8 Pad AC Adaptor SPAKZ0481AFZZ 9 R...