Service manual

MD-M3/M1
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■ If a problem occurs If this unit functions abnormally during operation, first check the following items. If the unit continues to function abnormally , or if an abnormality appears other than listed below, set this unit to the stand-by mode and discon- nect the AC power plug, then consult your SHARP dealer or service personnel.
TROUBLESHOOTING
General
Possible cause
Did a power failure occur?
Is the volume level is set to “0”? Are the headphones connected?
Are the speaker wires disconnected?
When a radio or TV which uses an indoor antenna is placed near the unit, the picture on the TV screen may be distorted or the radio may not function properly.
Remedy
Try setting it again. Set this unit to the stand-by mode and then turn it back on. Then, retry the operation.
Increase the volume level. Disconnect the headphones. Connect the wires securely. It is recommended that you use an external antenna.
Symptom
The clock is wrong. When a button is pressed, the unit does not respond.
No sound is heard. Radios make unusual noise or the picture on the TV screen is dis- torted.
Symptom
A recording cannot be made.
Even though a disc has been loaded, “MD NO DISC” or “READ ERR” is displayed. Playback sounds are skipped.
Possible cause
Is the MiniDisc protected against accidental erasure?
Did you try to make recording on a play-back only MiniDisc?
Can you see the “DISC FULL” or
“TOC FULL
” message in the dis-
play? (
:number or symbol)
The source has been encoded with the SCMS signal (Serial Copy Man- agement System). The disc is very dirty.
Is the unit located near excessive
vibrations?
Has condensation formed inside the
unit?
Remedy
Slide the accidental erase pre- vention tab back to its original position.
Replace it with a recordable disc.
Put in another recordable disc
with recording space on it.
Use another source.
Clean the disc. Place the unit on a firm, level
surface free from vibration.
Remove the disc and leave the
power turned on. The unit should function properly in about 1 hour.
MD recording and playback
CD Playback
Possible cause
The disc is loaded up-side down. The disc is very dirty. The disc which does not satisfy the standards. Is the unit located near excessive vibrations?
Has condensation formed inside the unit?
Remedy
Load the disc with the correct side up.
Clean the disc. Load the correct disc. Place the unit on a firm, level
surface free from vibration.
Remove the disc and leave the
power turned on. The unit should function properly in about 1 hour.
Symptom
Even though a disc has been loaded, “CD NO DISC” or “ERR” is displayed. Playback stops in the middle of a track, or playback is not performed properly.
Playback sounds are skipped.
Symptom
Radios make unusual noise con- secutively .
Possible cause
The unit is placed near the TV or computer .
The antenna direction is not placed
properly.
Remedy
When the unit receives a radio broadcast near a TV set, a com- puter or a word-processor ,it may pick up noise. If this hap- pens,try to move the unit from the place where the noise is picked up.
Correct the antenna direction.
Radio reception
The preset channel cannot be re- called.
Did you erase the programmed sta-
tion?
Preset the channel again. Redo programming.
(Continued)
Symptom
The remote control does not func- tion or does not operate properly. The power cannot be turned on from the remote control.
Possible cause
The batteries (polarity) are not in- serted properly. The batteries inside the remote con- trol are dead.
The remote control is operated from an incorrect distance or angle. Is the AC power cord plugged in?
Remedy
Insert properly.
Replace the batteries. Operate it within a range of 8" (0.2m) to 20' (6m) and within an angle of 15 ° to either side of
center.
Connect the AC power cord.
Remote control
When an error message is displayed, proceed as follows:
Error messages BLANK MD CAN’T EDIT CAN’T REC
CD NO DISC DISC FULL FOCUS ERR MD ERR MD NO DISC
MECHA ERR* (*:Number or symbol) NAME FULL NOT AUDIO
PLAY MD PROTECTED READ ERR TEMP OVER TOC ERR* (*:Number or
symbol) TOC FULL* (*:Number or symbol) TOC W ERR U TOC ERR* (*:Number or
symbol) U TOC ERR W ? DISC 00:00
Remedy
● Replace it with another disc. ● Change the stop position of the track and
then try editing it.
● Re-record or replace the MiniDisc. ● Replace it with another disc. ● Load a CD. ● Reload the CD. ● Replace the disc with another recordable
disc.
● Reload the MiniDisc. ● Contact the shop where you purchased the
unit.
● Load a MiniDisc. ● Reload the MiniDisc. ● Set this unit to the stand-by mode and press
the MD EJECT button.
● Shorten the disc or track name. ● Select another track. ● Replace the disc. ● Replace it with another recordable disc. ● Move the write protection tab back to its
original position.
● Reload the disc or replace it. ● Set this unit to the stand-by mode and wait
for a while.
● Replace it with another disc. ● Replace it with another recordable disc. ● Contact the shop where you purchased the
unit.
● Replace it with another disc. ● Erase the disc and try recording again. ● Set this unit to the stand-by mode and try to
write the TOC again. (Remove any source of shock or vibration while writing.)
● Replace it with another disc. ● Replace the disc with another recordable
disc.
Meaning
● Nothing is recorded. ● A track cannot be edited. ● Recording cannot be performed correctly
due to vibration or shock in the unit.
● Timer recording is impossible or there is no
available space on the MD.
● A CD has not been loaded. ● The disc data cannot be read. ● The disc is out of recording space. ● A disc has not been loaded. ● The disc data cannot be read. ● Trouble is found. ● A MiniDisc has not been loaded. ● The disc data cannot be read. ● There is a mechanical problem and the disc
is not working properly .
● The number of characters for the disc name
or track name exceeds 40.
● The data recorded on this disc is not audio
data.
● You tried to record on a playback-only disc. ● The disc is write protected. ● The disc is damaged. ● A TOC is not written on the MD or there is
something wrong with data.
● The temperature is too high. ● The disc is damaged. ● TOC information cannot be read. ● MD not specified. ● There is no space left for recording charac-
ter information (track names, disc names, etc.).
● Recording is impossible. ● TOC information recorded on the MD does
not match the MD specifications or it can- not be read.
● The TOC information could not be created
properly due to a mechanical shock or to scratches on the disc.
● The data contains an error. ● Music is not being recorded.
ERROR MESSAGES