Operation Manual
Page 8
... I you use wedged* Modes inkemceddiem Macy MC) In is nomad • re s t uss Sis unk II ody Ms an manoll Mew Inn. 2 our. oi Ow MD 00:00:01, eayMwGlaij•exe CHM= • SSW sou am WOO M sildisigeabo bailey moo Ms shske Oseimyst Me same sme do nos memo wind...
... I you use wedged* Modes inkemceddiem Macy MC) In is nomad • re s t uss Sis unk II ody Ms an manoll Mew Inn. 2 our. oi Ow MD 00:00:01, eayMwGlaij•exe CHM= • SSW sou am WOO M sildisigeabo bailey moo Ms shske Oseimyst Me same sme do nos memo wind...
Operation Manual
Page 9
... socket, using the analogue cable included with this unit Using en oplce sgnel Ta transfer the music to a MiroDisc allows very h gh quality record- • Maio equipment: CO Myer, MD player. COBS tuner, etc. • Cable required Optical digital cable ;Optical digital cable included writ the unit or optional optical digital cable...
... socket, using the analogue cable included with this unit Using en oplce sgnel Ta transfer the music to a MiroDisc allows very h gh quality record- • Maio equipment: CO Myer, MD player. COBS tuner, etc. • Cable required Optical digital cable ;Optical digital cable included writ the unit or optional optical digital cable...
Operation Manual
Page 17
... you don't want to erase alter the po Futon the disc whew you want to make a new recording, use the move Ire trace and then make a new recordirg. recordings using a CD payer or en MD player, track numbers will be dismayed E-16 iSee °EDITING', page 27.) Making a track number ...automatically: Press the EDIT/MARK button whilst the recording is paused 2 3 PM 'try, km-i5E OK? 2:00' Prober aline...
... you don't want to erase alter the po Futon the disc whew you want to make a new recording, use the move Ire trace and then make a new recordirg. recordings using a CD payer or en MD player, track numbers will be dismayed E-16 iSee °EDITING', page 27.) Making a track number ...automatically: Press the EDIT/MARK button whilst the recording is paused 2 3 PM 'try, km-i5E OK? 2:00' Prober aline...
Operation Manual
Page 21
The entire MD is controlled by We information a this TOC, which enables the unit ts lircl the beginning of Contents) is nformaton about the track numbers and recorded areas that intornation in tie slop mode. -His will be erased. ab LI° :35 29:07 TOC chpay • When is dis-...cf the following - TN indicates that allow the unit to a MiniDisc in a pos.tion where TOG infor- The power tat be erased. Do not remove the rechargeab e bat- the added recording twit be turned at aft, the TOG bus been recorded on the thwarter several editing steps have been performed Caution: •...
The entire MD is controlled by We information a this TOC, which enables the unit ts lircl the beginning of Contents) is nformaton about the track numbers and recorded areas that intornation in tie slop mode. -His will be erased. ab LI° :35 29:07 TOC chpay • When is dis-...cf the following - TN indicates that allow the unit to a MiniDisc in a pos.tion where TOG infor- The power tat be erased. Do not remove the rechargeab e bat- the added recording twit be turned at aft, the TOG bus been recorded on the thwarter several editing steps have been performed Caution: •...
Operation Manual
Page 28
... to the tracks Wowing he frank which come ate- EDITING • Whet the adding function can do you can create original discs using the MD °citing function, on can be named. the newly diviced back w.11 be automatically increased by one . E-27 BC Disc/Track name ...track. • Lepers (capital letters/lowercase letters), numbers and symbols can be translerred onto a recordable MD. Since track names are displayed when the beginning of the cha-actors and data on a recorded MD 'master MD with tracks and Il character inforrnat on which you can change the order co me tracks and...
... to the tracks Wowing he frank which come ate- EDITING • Whet the adding function can do you can create original discs using the MD °citing function, on can be named. the newly diviced back w.11 be automatically increased by one . E-27 BC Disc/Track name ...track. • Lepers (capital letters/lowercase letters), numbers and symbols can be translerred onto a recordable MD. Since track names are displayed when the beginning of the cha-actors and data on a recorded MD 'master MD with tracks and Il character inforrnat on which you can change the order co me tracks and...
Operation Manual
Page 33
... number of tracks on the new y recorded Min. E Note: • a 'he unit will be turned off the power. INSERT MD O T0C READ KY WRITE Or 8 Press the ENTER/SYNC button. • - • Check whether the total number of seeks on the newly recorded MiniDisc matches the total number of tracks on... the news recorded (AMPS, the unit will dist:tied "Can't WHITE"...
... number of tracks on the new y recorded Min. E Note: • a 'he unit will be turned off the power. INSERT MD O T0C READ KY WRITE Or 8 Press the ENTER/SYNC button. • - • Check whether the total number of seeks on the newly recorded MiniDisc matches the total number of tracks on... the news recorded (AMPS, the unit will dist:tied "Can't WHITE"...
Operation Manual
Page 38
...Shortly after furring on the cartridge. or there is excessive steam 01 moisture • when tne unit s moved from a cncl place to ar MD canricge, he unit has condensation inside. The condensation nose evaporate in the unit) • Regular cleaning If the surface or the cartridge becomes .... A Moil:Ifs° is not clinched properly. tl dust enters tne opening of an ex- Please note the loliowir• • Handling the MiniDisc Do not touch the disc directly! It the shutter is opened forcibly it . • If the labei pees oft or partiallyltub away, replace P.M a...
...Shortly after furring on the cartridge. or there is excessive steam 01 moisture • when tne unit s moved from a cncl place to ar MD canricge, he unit has condensation inside. The condensation nose evaporate in the unit) • Regular cleaning If the surface or the cartridge becomes .... A Moil:Ifs° is not clinched properly. tl dust enters tne opening of an ex- Please note the loliowir• • Handling the MiniDisc Do not touch the disc directly! It the shutter is opened forcibly it . • If the labei pees oft or partiallyltub away, replace P.M a...
Service Manual
Page 1
The contents are subject to be used for after sales service only. MD-MS722/C/W/MS721W SERVICE MANUAL No. SX891MDMS722U (Illustration: MD-MS722/MS722C/MS722W) MD-MS722 MD-MS722C MD-MS722W MD-MS721W(BL) MD-MS721W(S) (Illustration: MD-MS721W) • In the interests of user-safety the set should be restored to its ... BLOCK DIAGRAM ...29 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 -
The contents are subject to be used for after sales service only. MD-MS722/C/W/MS721W SERVICE MANUAL No. SX891MDMS722U (Illustration: MD-MS722/MS722C/MS722W) MD-MS722 MD-MS722C MD-MS722W MD-MS721W(BL) MD-MS721W(S) (Illustration: MD-MS721W) • In the interests of user-safety the set should be restored to its ... BLOCK DIAGRAM ...29 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
Page 2
... replacement service parts have already been adjusted prior to shipping. (3) No adjustment to detect a disc. Use the portable minidisc recorder only in accordance with the instructions given in this manual and do not attempt to interfere with the interlock switch or make... MD-MS722/C/W/MS721W SAFETY PRECAUTION FORSERVICE MANUAL (MD-MS722W/MS721W ONLY) Precaution to be lower than the lead-in position, the Laser will light up Figure 2-1 Disc cover Magnet Head Lasar Beam Mechanism Chassis Disc motor Main PWB Optical Pick-Up Figure 2-2 - 2 - This Portable MiniDisc Recorder is...
... replacement service parts have already been adjusted prior to shipping. (3) No adjustment to detect a disc. Use the portable minidisc recorder only in accordance with the instructions given in this manual and do not attempt to interfere with the interlock switch or make... MD-MS722/C/W/MS721W SAFETY PRECAUTION FORSERVICE MANUAL (MD-MS722W/MS721W ONLY) Precaution to be lower than the lead-in position, the Laser will light up Figure 2-1 Disc cover Magnet Head Lasar Beam Mechanism Chassis Disc motor Main PWB Optical Pick-Up Figure 2-2 - 2 - This Portable MiniDisc Recorder is...
Service Manual
Page 3
...MD-MS722/C/W/MS721W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. The above values are the standard values when the unit is set to "VOL 0". The operating time when using one, commercially available, high capacity, "AA" size batteries with the rechargeable battery (fully charged) Continuous recording...)/ remote control unit MiniDisc Recorder Type: Signal readout: Audio channels: Frequency response: Rotation speed: Error correction: Coding: Recording method: Sampling frequency: Wow and flutter: Portable MiniDisc recorder Non-contact, 3-beam...
...MD-MS722/C/W/MS721W FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. The above values are the standard values when the unit is set to "VOL 0". The operating time when using one, commercially available, high capacity, "AA" size batteries with the rechargeable battery (fully charged) Continuous recording...)/ remote control unit MiniDisc Recorder Type: Signal readout: Audio channels: Frequency response: Rotation speed: Error correction: Coding: Recording method: Sampling frequency: Wow and flutter: Portable MiniDisc recorder Non-contact, 3-beam...
Service Manual
Page 4
MD-MS722/C/W/MS721W MD-MS722/MS722C/MS722W NAME OF PARTS Remote control unit 1. Battery Indicator: 10. Stop/Power Off/Bass/Play Mode Shuttle Switch 2 1 3 6 SYNC REC 1 4 RANDOM TOTAL 5 7 89 13 14 Main unit 1. Level Meter 5. TOC Indocator 7. Track Number Indicator 10. Disc Name Indicator 14. Handstrap Attachment Eye 30. Optical/Line Input Jack (MS722...Random Indicator 6. Hold Switch 13. Fast Reverse/Fast Forward/Recording Level Control/ Cursor Shuttle Switch: 25. Headphones Jack (MS722/MS722C) 36. Repeat Indicator: 5. Earphones Socket (MS722W...
MD-MS722/C/W/MS721W MD-MS722/MS722C/MS722W NAME OF PARTS Remote control unit 1. Battery Indicator: 10. Stop/Power Off/Bass/Play Mode Shuttle Switch 2 1 3 6 SYNC REC 1 4 RANDOM TOTAL 5 7 89 13 14 Main unit 1. Level Meter 5. TOC Indocator 7. Track Number Indicator 10. Disc Name Indicator 14. Handstrap Attachment Eye 30. Optical/Line Input Jack (MS722...Random Indicator 6. Hold Switch 13. Fast Reverse/Fast Forward/Recording Level Control/ Cursor Shuttle Switch: 25. Headphones Jack (MS722/MS722C) 36. Repeat Indicator: 5. Earphones Socket (MS722W...
Service Manual
Page 5
...Pause Button: 17. Battery Indicator: 7. Fast Reverse/Recording Level Control/ Cursor Button: 19. Eject Lever 31. MD-MS721W Remote control unit 1. Synchro Recording Indicator 2. Battery Indicator: 10. Remaining Recording Time Indicator 15. Display/Lowercase Characters Button 22. Volume.../Name Select Buttons: + 24. Random Indicator 8. Synchro Recording Indicator 11. Volume/Name Select Buttons: - 23. Character Button 26. Stop/Power Off Button: /:OFF 30. MD-MS722/C/W/MS721W 1 2 3 6 SYNC REC 1 4 RANDOM TOTAL 5 7 89 10 ...
...Pause Button: 17. Battery Indicator: 7. Fast Reverse/Recording Level Control/ Cursor Button: 19. Eject Lever 31. MD-MS721W Remote control unit 1. Synchro Recording Indicator 2. Battery Indicator: 10. Remaining Recording Time Indicator 15. Display/Lowercase Characters Button 22. Volume.../Name Select Buttons: + 24. Random Indicator 8. Synchro Recording Indicator 11. Volume/Name Select Buttons: - 23. Character Button 26. Stop/Power Off Button: /:OFF 30. MD-MS722/C/W/MS721W 1 2 3 6 SYNC REC 1 4 RANDOM TOTAL 5 7 89 10 ...
Service Manual
Page 6
...to the alkaline battery. Insert securely, all the way in the unit, it is inserted and a MiniDisc has already been inserted, playback may start recording or editing. In this unit or a separately available car adaptor is completely discharged, the whole battery indicator... is in . OPERATION MANUAL MD-MS722/C/W/MS721W Battery charging will be shown. Then, the power will be impossible. Insert the side with a new one. This is shown by the SCMS (Serial Copy Management System). Playback Digital cable Recording CD player, MD player, etc. About 4 seconds...
...to the alkaline battery. Insert securely, all the way in the unit, it is inserted and a MiniDisc has already been inserted, playback may start recording or editing. In this unit or a separately available car adaptor is completely discharged, the whole battery indicator... is in . OPERATION MANUAL MD-MS722/C/W/MS721W Battery charging will be shown. Then, the power will be impossible. Insert the side with a new one. This is shown by the SCMS (Serial Copy Management System). Playback Digital cable Recording CD player, MD player, etc. About 4 seconds...
Service Manual
Page 7
...adaptor back into the unit, remove the AC adaptor from the AC socket immediately and contact an authorised SHARP service centre. Even if several short tracks are recorded using the cue and review operations, some sounds may not function properly. TROUBLESHOOTING Moisture condensation In the .... Is the battery exhausted? When the operation buttons are scratches on the disc. The MiniDisc cannot be read, and the unit may be combined in the recording or editing mode? MD-MS722/C/W/MS721W - 7 - Is the remote control unit or the earphones plugged in approximately 1 hour....
...adaptor back into the unit, remove the AC adaptor from the AC socket immediately and contact an authorised SHARP service centre. Even if several short tracks are recorded using the cue and review operations, some sounds may not function properly. TROUBLESHOOTING Moisture condensation In the .... Is the battery exhausted? When the operation buttons are scratches on the disc. The MiniDisc cannot be read, and the unit may be combined in the recording or editing mode? MD-MS722/C/W/MS721W - 7 - Is the remote control unit or the earphones plugged in approximately 1 hour....
Service Manual
Page 8
... high. DISC (?DISC) The temperature is out of the track and then try recording again. Connect the digital cable securely. Turn off the power, and wait for power). Turn off the power and remove the MiniDisc. MD-MS722/C/W/MS721W - 8 - BLANK DISC (BLANK) Can't COPY (Not REC) Can't... EDIT Nothing is impossible. No copy can be played. Can't REC (Not REC) Can't WRITE DEFECT (DEFECT) Recording cannot be edited. Editing is recorded. HOLD (HOLD) LOCKED LOCK ERROR...
... high. DISC (?DISC) The temperature is out of the track and then try recording again. Connect the digital cable securely. Turn off the power, and wait for power). Turn off the power and remove the MiniDisc. MD-MS722/C/W/MS721W - 8 - BLANK DISC (BLANK) Can't COPY (Not REC) Can't... EDIT Nothing is impossible. No copy can be played. Can't REC (Not REC) Can't WRITE DEFECT (DEFECT) Recording cannot be edited. Editing is recorded. HOLD (HOLD) LOCKED LOCK ERROR...
Service Manual
Page 11
...(B1)x2 ø1.4x2mm 1 Bottom Cabinet 1. Screw B1) x3 11-1 2. Raise the rear part, and remove in the arrow direction. (Illustration: MD-MS722) 11-3 Pull Pull Pull Pull Pull Pull (C3)x3 (C2)x1* (C2)x1 Flexble PWB for the optical pickup from the machine, and take ... incorrect fixing may result in malfunction. 3. Flexble PWB B2) x2 11-2 Put the fold on the connector, and apply with the sheet metal. MD-MS722/C/W/MS721W DISASSEMBLY (A2)x2 Cares before disassembling ø1.4x2mm (A2)x1 ø1.4x2mm When assembling the machine after repair, be disabled. When ...
...(B1)x2 ø1.4x2mm 1 Bottom Cabinet 1. Screw B1) x3 11-1 2. Raise the rear part, and remove in the arrow direction. (Illustration: MD-MS722) 11-3 Pull Pull Pull Pull Pull Pull (C3)x3 (C2)x1* (C2)x1 Flexble PWB for the optical pickup from the machine, and take ... incorrect fixing may result in malfunction. 3. Flexble PWB B2) x2 11-2 Put the fold on the connector, and apply with the sheet metal. MD-MS722/C/W/MS721W DISASSEMBLY (A2)x2 Cares before disassembling ø1.4x2mm (A2)x1 ø1.4x2mm When assembling the machine after repair, be disabled. When ...
Service Manual
Page 12
...the optical pickup unit (See Fig. 12-5.) 1. Remove the screws (C4) x 2 pc., and remove the sled motor. Remove the screw (E1) x 1 pc. 2. MD-MS722/C/W/MS721W REMOVING AND REINSTALLING THE MAIN PARTS Remove the mechanism according to the disassembling methods 1 to 3. (See Page 11.) (A2)x3 ø1.4x2.8mm How... connects the magnetic head to remove the lift motor (See Fig. 12-2.) 1. Remove the solder joint (A1) x 1 of slide motor lead wire. 2. MD Mechanism Figure 12-2 Stop Washer (C1)x1 (C4)x2 ø1.4x1.2mm Drive Gear (C2)x1 Shaft Sled Motor (C3)x1 Mechanism Flexible PWB Solder...
...the optical pickup unit (See Fig. 12-5.) 1. Remove the screws (C4) x 2 pc., and remove the sled motor. Remove the screw (E1) x 1 pc. 2. MD-MS722/C/W/MS721W REMOVING AND REINSTALLING THE MAIN PARTS Remove the mechanism according to the disassembling methods 1 to 3. (See Page 11.) (A2)x3 ø1.4x2.8mm How... connects the magnetic head to remove the lift motor (See Fig. 12-2.) 1. Remove the solder joint (A1) x 1 of slide motor lead wire. 2. MD Mechanism Figure 12-2 Stop Washer (C1)x1 (C4)x2 ø1.4x1.2mm Drive Gear (C2)x1 Shaft Sled Motor (C3)x1 Mechanism Flexible PWB Solder...
Service Manual
Page 13
...etc. 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 UDSKM0001AFZZ Note: Use the low reflection disc on individually.) • Cut-off frequency...In the normal mode both temperature correction and posture correction are changed according to (5). MANUAL 1 Mode 4. AUTO 2 Mode 3. MD-MS722/C/W/MS721W Test disc ADJUSTMENT MD adjustment needs two types of DC IN. Setting by special button operation (in AUTO 2 or MANUAL 2 is indicated. •...
...etc. 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 UDSKM0001AFZZ Note: Use the low reflection disc on individually.) • Cut-off frequency...In the normal mode both temperature correction and posture correction are changed according to (5). MANUAL 1 Mode 4. AUTO 2 Mode 3. MD-MS722/C/W/MS721W Test disc ADJUSTMENT MD adjustment needs two types of DC IN. Setting by special button operation (in AUTO 2 or MANUAL 2 is indicated. •...
Service Manual
Page 14
... in each TEST mode 1. If the VOL DOWN button is pressed while ADJ. At this time the adjustment value is not output. • Adjustment NG; MD-MS722/C/W/MS721W Operation in AUTO1 mode is performed manually. • When the VOL UP button is pressed during adjustment, the setting increases, and the new setting...
... in each TEST mode 1. If the VOL DOWN button is pressed while ADJ. At this time the adjustment value is not output. • Adjustment NG; MD-MS722/C/W/MS721W Operation in AUTO1 mode is performed manually. • When the VOL UP button is pressed during adjustment, the setting increases, and the new setting...
Service Manual
Page 15
...NORMAL Mode • When the STOP button is pressed while the NORMAl menu appears, the mode changes to record power.) * After the laser record power is indicated for one second, the address indication is restored. [ RPW ] • : Address ... ] | Continuous playback (C1 error indication) [ C E ] | Continuous playback (ADIP error indication) [ A E ] | Continuous playback (ADIP address indication) [ A P ] 8. MD-MS722/C/W/MS721W •Whenever the DISP button is pressed in the memory. • When the DISP button is pressed while the error data indication menu appears...
...NORMAL Mode • When the STOP button is pressed while the NORMAl menu appears, the mode changes to record power.) * After the laser record power is indicated for one second, the address indication is restored. [ RPW ] • : Address ... ] | Continuous playback (C1 error indication) [ C E ] | Continuous playback (ADIP error indication) [ A E ] | Continuous playback (ADIP address indication) [ A P ] 8. MD-MS722/C/W/MS721W •Whenever the DISP button is pressed in the memory. • When the DISP button is pressed while the error data indication menu appears...