SARP MDMT821HBL
Service Manual

TROUBLESHOOTING MINIDISC SYSTEM LIMITATIONS
MiniDiscs are recorded using a different system than is used for cassette tapes or DAT s Moisture condensation recordings. Therefore, the following conditions may be encountered, depending on how
read, and the unit may not function

MD-MT821H

In following cases, When the unit has condensation the disc has been recorded or edited. These are due to system limitations, and should be may form inside unit. inside, the disc signals cannot be considered normal.

q Shortly after turning on a heater. When the number of tracks used q When unit is placed in a room where reaches limit, regardless of the q When the unit is moved from a cool

there is excessive steam or moisture. remaining recording time, further

recording will be impossible. If a MiniDisc has been recorded or edited repeatedly or if a MiniDisc has scratches on it, it may not be possible If something seems to be wrong with this product, check the following before calling your to record the maximum number of authorised SHARP dealer or service centre. tracks on it. If there are scratches on a disc, the unit

place to a warm place. (Maximum number of tracks: 255)

Even if the maximum recording time of a MiniDisc has not been reached, �DISC FULL� or �TOC

properly. q If this happens, remove the disc. The condensation should evaporate in approximately 1 hour. The unit will then function properly.

Many potential �problems� can be resolved by the owner without calling a service techniFULL� may be displayed. cian.

PROBLEM CAUSE Even if the number of tracks and

q Is AC adaptor disconnected? the time have not will automatically avoid recording in q Is the battery exhausted? reached the limit, �DISC FULL� those areas. The recording time will be

The unit does not turn q Is unit in the hold mode? on. q Has condensation formed inside the unit?

may be displayed. reduced.

q Is the unit being influenced mechanical shock or by When the remaining recording time of Even if several short tracks are

static electricity? a disc is displayed, short tracks less erased, the remaining recording

No sound is heard from q Is remote control unit or the earphones plugged in? the earphones. q Are you trying to play a MiniDisc with data it instead For MiniDiscs on which repeated

q Is the volume set too low? included in the total.

than 12 seconds long may not be time may not show an increase. Two tracks may not be combined of a MiniDisc containing music? recording and editing operations were in editing. performed, the COMBINE function

�6�
q Is unit in the recording or editing mode?

When the operation may not work. buttons are pressed, the unit does not respond.

q Is unit in the hold mode? q Is the battery exhausted? q Is remote control unit or the earphone plug inA cluster (about 2 seconds) is normally

serted firmly? the minimum unit of recording. So, even

q Has the track number or character information been Therefore, the time actually available for

written on the disc yet? recording may be less than the

remaining time displayed. recording time.

if a track is less than 2 seconds long, it Some sounds are q Is the battery exhausted? will use about 2 seconds of space on the skipped. q Is the unit being subjected to excessive vibration? disc. The total of the recorded time and time remaining on a disc may not The MiniDisc cannot be add up to the maximum possible ejected. If there are scratches on discs, those q Is the MiniDisc protected against accidental erasure? sections will be automatically avoided q Is unit connected properly to the other equipment?

q Is the AC adaptor unplugged or did a power failure (no recording will be placed in those

Recording and editing sections). Therefore, the recording time are impossible. will be reduced.

occur whilst recording or editing?

q Is unit in the hold mode? q Is an optical signal being output from the external When recorded tracks are played For MiniDiscs on which repeated

equipment? back using the cue review oprecording and editing were performed, Read operation manual for the external equipment. some sounds may be skipped whilst

erations, some sounds may be skipped. cueing and reviewing. If there are scratches or dust on a A track number can be created in the middle of a track.
4. Plug adaptor back into AC MiniDisc, the track numbers following When this product is subjected to strong

s If trouble occurs

external interference (mechanical shock, socket and retry the operation. that track will be increased by one. excessive static electricity, abnormal supply voltage due to lightning, etc.) if it is If strange sounds, smell or smoke come out operated incorrectly, it may malfunction. If of unit or an object is dropped into the such a problem occurs, do following: unit, remove adaptor from the AC 1. Unplug adaptor from the AC socket immediately and contact an socket. authorised SHARP service centre. 2. Remove the battery. 3. Leave the unit completely unpowered for approximately 30 seconds.