Service Manual
Page 1
... only. This document has been published to change without notice. MD-MS722/C/W/MS721W SERVICE MANUAL No. CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MS722W/MS721W ONLY 2 SPECIFICATIONS ...3 NAMES OF PARTS ...4 OPERATION MANUAL ...6 QUICK GUIDE (MD-MS722 ONLY) ...9 DISASSEMBLY ...11 INSTALLING THE TOP CABINET ...11 REMOVING... SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD 30 NOTES ON SCHEMATIC DIAGRAM ...39 WAVEFORMS OF MD CIRCUIT ...40 TROUBLE SHOOTING ...41 FUNCTION TABLE OF IC ...44 PARTS GUIDE/EXPLODED VIEW PACKING OF THE SET (MD-MS722 ONLY) SHARP CORPORATION - 1 -
... only. This document has been published to change without notice. MD-MS722/C/W/MS721W SERVICE MANUAL No. CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MS722W/MS721W ONLY 2 SPECIFICATIONS ...3 NAMES OF PARTS ...4 OPERATION MANUAL ...6 QUICK GUIDE (MD-MS722 ONLY) ...9 DISASSEMBLY ...11 INSTALLING THE TOP CABINET ...11 REMOVING... SCHEMATIC DIAGRAM/WIRING SIDE OF P.W.BOARD 30 NOTES ON SCHEMATIC DIAGRAM ...39 WAVEFORMS OF MD CIRCUIT ...40 TROUBLE SHOOTING ...41 FUNCTION TABLE OF IC ...44 PARTS GUIDE/EXPLODED VIEW PACKING OF THE SET (MD-MS722 ONLY) SHARP CORPORATION - 1 -
Service Manual
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... Laser Power Output for several seconds to detect a disc. Use the portable minidisc recorder only in accordance with the instructions given in this may result in exposure to hazardous radiation. STRÅLEN ÄR FARLIG. MD-MS722/C/W/MS721W SAFETY PRECAUTION FORSERVICE MANUAL (MD-MS722W/MS721W ONLY) Precaution to be sure to disconnect the AC adaptor and...
... Laser Power Output for several seconds to detect a disc. Use the portable minidisc recorder only in accordance with the instructions given in this may result in exposure to hazardous radiation. STRÅLEN ÄR FARLIG. MD-MS722/C/W/MS721W SAFETY PRECAUTION FORSERVICE MANUAL (MD-MS722W/MS721W ONLY) Precaution to be sure to disconnect the AC adaptor and...
Service Manual
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...MiniDisc Recorder Type: Signal readout: Audio channels: Frequency response: Rotation speed: Error correction: Coding: Recording method: Sampling frequency: Wow and flutter: Portable MiniDisc recorder...MS722/MS722C) Power source: (MS722W/MS721W) Power consumption: (MS722...MS722...(MS722/MS722C...recording: Approx. 8 hours Continuous recording: Approx. 3 hours Continuous recording...recording time is for this model are converted to 44.1 kHz, and then recorded...Recording level Reference input level Input impedance MIC H 0.25 mV 10 k ohms MIC L 2.5 mV 10 k ohms LINE 100 mV 20 k ohms - 3 - MD-MS722...
...MiniDisc Recorder Type: Signal readout: Audio channels: Frequency response: Rotation speed: Error correction: Coding: Recording method: Sampling frequency: Wow and flutter: Portable MiniDisc recorder...MS722/MS722C) Power source: (MS722W/MS721W) Power consumption: (MS722...MS722...(MS722/MS722C...recording: Approx. 8 hours Continuous recording: Approx. 3 hours Continuous recording...recording time is for this model are converted to 44.1 kHz, and then recorded...Recording level Reference input level Input impedance MIC H 0.25 mV 10 k ohms MIC L 2.5 mV 10 k ohms LINE 100 mV 20 k ohms - 3 - MD-MS722...
Service Manual
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...com- Then, the power will increase when the unit switches to use it after the power has been turned on a MiniDisc MiniDiscs are designed so that was digitally recorded on . - 6 - Insert the side with a new one. Since the battery indicator shows the remaining amount of disuse...has run completely out, "BATT EMPTY" (main unit) and "Lo BATT" (remote control unit) will go out. OPERATION MANUAL MD-MS722/C/W/MS721W POWER SOURCE This unit can made, further digital copies are cases where digital recording may start recording or editing. Notes: When using digital cables.
...com- Then, the power will increase when the unit switches to use it after the power has been turned on a MiniDisc MiniDiscs are designed so that was digitally recorded on . - 6 - Insert the side with a new one. Since the battery indicator shows the remaining amount of disuse...has run completely out, "BATT EMPTY" (main unit) and "Lo BATT" (remote control unit) will go out. OPERATION MANUAL MD-MS722/C/W/MS721W POWER SOURCE This unit can made, further digital copies are cases where digital recording may start recording or editing. Notes: When using digital cables.
Service Manual
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... cannot be placed in the middle of a MiniDisc has not been reached, "DISC FULL" or "TOC FULL" may not function properly. Therefore, the following before calling your authorised SHARP dealer or service centre. Is the unit in the recording or editing mode? Is the unit in the... hold mode? The recording time will then function properly. Is the unit being influenced by mechanical shock or by one. Shortly after turning on how the disc has been recorded or edited. A track number can be increased by static electricity? MD-MS722...
... cannot be placed in the middle of a MiniDisc has not been reached, "DISC FULL" or "TOC FULL" may not function properly. Therefore, the following before calling your authorised SHARP dealer or service centre. Is the unit in the recording or editing mode? Is the unit in the... hold mode? The recording time will then function properly. Is the unit being influenced by mechanical shock or by one. Shortly after turning on how the disc has been recorded or edited. A track number can be increased by static electricity? MD-MS722...
Service Manual
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...recording. 9. Type Test disc Parts No. 1 High reflection disc MMD-110 (TEAC Test MD) 2 Lowreflection disc MMD-212 (TEAC Test MD) 88GMMD-110 88GMMD-212 3 Low reflection disc Recording minidisc... updating, adjustment error setting (so as follows. RESULT 2 Mode 7. MD-MS722/C/W/MS721W Test disc ADJUSTMENT MD adjustment needs two types of DC IN. Entering the TEST mode 1. ...is displayed. (Updating in real time) • Seeing the displayed adjustment value, perform preliminary manual adjustment. (Error rate indication, jump test) • Temperature is displayed. (Updating in real...
...recording. 9. Type Test disc Parts No. 1 High reflection disc MMD-110 (TEAC Test MD) 2 Lowreflection disc MMD-212 (TEAC Test MD) 88GMMD-110 88GMMD-212 3 Low reflection disc Recording minidisc... updating, adjustment error setting (so as follows. RESULT 2 Mode 7. MD-MS722/C/W/MS721W Test disc ADJUSTMENT MD adjustment needs two types of DC IN. Entering the TEST mode 1. ...is displayed. (Updating in real time) • Seeing the displayed adjustment value, perform preliminary manual adjustment. (Error rate indication, jump test) • Temperature is displayed. (Updating in real...
Service Manual
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MD-MS722/C/W/MS721W Operation in the TEST-PLAY mode, the digit which is changed by the SKIP UP/DOWN button changes as follows. 1 - 10 - 384 - 1 * After the number of jump lines is indicated for AUTO2 and MANUAL 2 are displayed. • If the VOL UP button is pressed while the AUTO2 menu ... the setting increases. At this time the adjustment value is executed. 2. MANUAL2 Mode • Adjustment item to be made in AUTO2 mode is performed manually. • When the VOL UP button is pressed during adjustment, the setting increases, and the new setting is output. • If the VOL DOWN...
MD-MS722/C/W/MS721W Operation in the TEST-PLAY mode, the digit which is changed by the SKIP UP/DOWN button changes as follows. 1 - 10 - 384 - 1 * After the number of jump lines is indicated for AUTO2 and MANUAL 2 are displayed. • If the VOL UP button is pressed while the AUTO2 menu ... the setting increases. At this time the adjustment value is executed. 2. MANUAL2 Mode • Adjustment item to be made in AUTO2 mode is performed manually. • When the VOL UP button is pressed during adjustment, the setting increases, and the new setting is output. • If the VOL DOWN...
Service Manual
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MD-MS722/C/W/MS721W - 18 - NG : During preadjustment adjustment : Preadjustment error (adjustment value output) ADJ. OK PLAY : Preadjustment normal end (adjustment value output) A T 2 : During ATT automatic adjustment ...R S L T 2 SKIP UP SKIP DOWN Din Mon SKIP UP SKIP DOWN E DATA : Pre-autoadjustment menu : ATT autoadjustment menu : Continuous playback menu : Continuous record menu : Pre-manual adjustment menu : ATT manual adjustment menu : Preadjustment value check menu : ATT adjustment value check menu : Digital input signal monitor menu : Error history display menu SKIP UP SKIP...
MD-MS722/C/W/MS721W - 18 - NG : During preadjustment adjustment : Preadjustment error (adjustment value output) ADJ. OK PLAY : Preadjustment normal end (adjustment value output) A T 2 : During ATT automatic adjustment ...R S L T 2 SKIP UP SKIP DOWN Din Mon SKIP UP SKIP DOWN E DATA : Pre-autoadjustment menu : ATT autoadjustment menu : Continuous playback menu : Continuous record menu : Pre-manual adjustment menu : ATT manual adjustment menu : Preadjustment value check menu : ATT adjustment value check menu : Digital input signal monitor menu : Error history display menu SKIP UP SKIP...
Service Manual
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ATT Auto Adjustment Pre-Manual Adjustment MD-MS722/C/W/MS721W - 19 - OK PLAY : ATT adjustment normal end (adjustment value output) S Q # # # # A P # # # # : Continuous playback (high reflection) : Continuous playback (low reflection) * ...G C H SKIP DOWN SKIP UP R C G SKIP DOWN SKIP UP S E SKIP DOWN SKIP UP S F SKIP DOWN SKIP UP SKIP DOWN Continued to the next page : Pre-Manual Adjustment menu : Temperature code display $ $ : Temperature code : A signal offset (AINO) tentative measurement : Measurement value : B signal offset (BINO) tentative measurement : Measurement value : ...
ATT Auto Adjustment Pre-Manual Adjustment MD-MS722/C/W/MS721W - 19 - OK PLAY : ATT adjustment normal end (adjustment value output) S Q # # # # A P # # # # : Continuous playback (high reflection) : Continuous playback (low reflection) * ...G C H SKIP DOWN SKIP UP R C G SKIP DOWN SKIP UP S E SKIP DOWN SKIP UP S F SKIP DOWN SKIP UP SKIP DOWN Continued to the next page : Pre-Manual Adjustment menu : Temperature code display $ $ : Temperature code : A signal offset (AINO) tentative measurement : Measurement value : B signal offset (BINO) tentative measurement : Measurement value : ...
Service Manual
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MD-MS722/C/W/MS721W - 20 - Continued from the preceding page ... measurement : Measurement value : S gain "Low" E signal offset (EINO) measurement : Measurement value : S gain "Low" F signal offset (FINO) measurement : Measurement value ATT Manual Adjustment M A N U 2 PLAY T M P SKIP UP L O N SKIP UP P E SKIP UP P F SKIP UP H A L a $ $ SKIP DOWN ... SKIP DOWN SKIP UP G F SKIP UP L A SKIP DOWN SKIP DOWN SKIP UP L B SKIP DOWN : Temperature code displayATT manual adjustment menu : Temperature code display $ $ : Temperature code : Laser ON (Play Power) : Pit section E-ATT (tracking) setting...
MD-MS722/C/W/MS721W - 20 - Continued from the preceding page ... measurement : Measurement value : S gain "Low" E signal offset (EINO) measurement : Measurement value : S gain "Low" F signal offset (FINO) measurement : Measurement value ATT Manual Adjustment M A N U 2 PLAY T M P SKIP UP L O N SKIP UP P E SKIP UP P F SKIP UP H A L a $ $ SKIP DOWN ... SKIP DOWN SKIP UP G F SKIP UP L A SKIP DOWN SKIP DOWN SKIP UP L B SKIP DOWN : Temperature code displayATT manual adjustment menu : Temperature code display $ $ : Temperature code : Laser ON (Play Power) : Pit section E-ATT (tracking) setting...
Service Manual
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...)] SPAKZ0465AFZZ J AD Pad,AC Adaptor [MS722W/MS721W (S)/ MS721W (BL) Except for Australia/New Zealand] SPAKZ0475AFZZ J AD Spacer,Operation Manual [MS722W/MS721W (S)/ MS721W (BL) for Australia/New Zealand] SPAKZ0489AFZZ J Pad,AC Adaptor [MS722C] SPAKZ0498AFZZ J Packing Add.,Unit SPAKZ0507AFZZ... 233 234 234 235 236 237 237 238 238 239 239 240 241 241 242 243 244 246 246 248 248 249 249 MD-MS722/C/W/MS721W PARTS CODE PRICE RANK DESCRIPTION PCUSG0675AFZZ J PGUMS0729AFZZ J PSHEZ0989AFZZ J PCUSG0534AFZZ J QTANZ9162AFFQ J PCUSG0635AFZZ J QTANZ9163AFFQ J PCUSG0674AFZZ J PCUSG0676AFZZ ...
...)] SPAKZ0465AFZZ J AD Pad,AC Adaptor [MS722W/MS721W (S)/ MS721W (BL) Except for Australia/New Zealand] SPAKZ0475AFZZ J AD Spacer,Operation Manual [MS722W/MS721W (S)/ MS721W (BL) for Australia/New Zealand] SPAKZ0489AFZZ J Pad,AC Adaptor [MS722C] SPAKZ0498AFZZ J Packing Add.,Unit SPAKZ0507AFZZ... 233 234 234 235 236 237 237 238 238 239 239 240 241 241 242 243 244 246 246 248 248 249 249 MD-MS722/C/W/MS721W PARTS CODE PRICE RANK DESCRIPTION PCUSG0675AFZZ J PGUMS0729AFZZ J PSHEZ0989AFZZ J PCUSG0534AFZZ J QTANZ9162AFFQ J PCUSG0635AFZZ J QTANZ9163AFFQ J PCUSG0674AFZZ J PCUSG0676AFZZ ...
Service Manual
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...Operation Manual [MS721W (S)/MS721W (BL) for Australia/New Zealand] AG Operation Manual [MS722W for Australia/New Zealand] Operation Manual [MS722C] AG Operation Manual [MS722] AD Quick Guide [MS722 Only] AN Operation Manual [MS722W Except for Australia/ New Zealand] AN Operation Manual [MS721W...)] OTHER SERVICE PARTS UDSKM0001AFZZ J AZ Recording Mini Disc 88GMMD-110 J BV High Reflection Disc MMD-110 (TEAC Test MD) 88GMMD-212 J BU Low Reflection Disc MMD-212 (TEAC Test MD) - 5 - Main [MS722/MS722C] J - PARTS CODE PRICE RANK DESCRIPTION P.W.B. MD-MS722/C/W/MS721W NO. ! ! ! ! ...
...Operation Manual [MS721W (S)/MS721W (BL) for Australia/New Zealand] AG Operation Manual [MS722W for Australia/New Zealand] Operation Manual [MS722C] AG Operation Manual [MS722] AD Quick Guide [MS722 Only] AN Operation Manual [MS722W Except for Australia/ New Zealand] AN Operation Manual [MS721W...)] OTHER SERVICE PARTS UDSKM0001AFZZ J AZ Recording Mini Disc 88GMMD-110 J BV High Reflection Disc MMD-110 (TEAC Test MD) 88GMMD-212 J BU Low Reflection Disc MMD-212 (TEAC Test MD) - 5 - Main [MS722/MS722C] J - PARTS CODE PRICE RANK DESCRIPTION P.W.B. MD-MS722/C/W/MS721W NO. ! ! ! ! ...
Service Manual
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SPAKA2704AFZZ - 8 - MD-MS722/C/W/MS721W PACKING OF THE SET (MD-MS722 ONLY) SETTING POSITION OF SWITCHES AND KNOBS UNIT HOLD OFF Remote Control HOLD CANCEL Connecting Cord, Optical Type Caution, Headphones Carrying Case UBAGC0076AFSA Operation Manual Quick Guide Headphones Battery Case Paper Bag, Unit SSAKP0116AFZZ MD-MS722 AC Adaptor Packing Add., Unit SPAKZ0498AFZZ Pad, AC Adaptor SPAKZ0489AFZZ Remote Control Strap Packing Add., Unit SPAKZ0509AFZZ Rechargeable, Battery Connecting Cord, RCA Type Packing Add. Packing Case SPAKC6672AFZZ : Not Replacement Item
SPAKA2704AFZZ - 8 - MD-MS722/C/W/MS721W PACKING OF THE SET (MD-MS722 ONLY) SETTING POSITION OF SWITCHES AND KNOBS UNIT HOLD OFF Remote Control HOLD CANCEL Connecting Cord, Optical Type Caution, Headphones Carrying Case UBAGC0076AFSA Operation Manual Quick Guide Headphones Battery Case Paper Bag, Unit SSAKP0116AFZZ MD-MS722 AC Adaptor Packing Add., Unit SPAKZ0498AFZZ Pad, AC Adaptor SPAKZ0489AFZZ Remote Control Strap Packing Add., Unit SPAKZ0509AFZZ Rechargeable, Battery Connecting Cord, RCA Type Packing Add. Packing Case SPAKC6672AFZZ : Not Replacement Item