Service manual
MD-MT15/15C/15H/15W/161E/18H
– 6 –
Many potential “problems” can be resolved by the owner without calling a service techni-
cian.
If something seems to be wrong with this product, check the following before calling your
authorized SHARP dealer or service center.
■ If trouble occurs
When this product is subjected to strong
external interference (mechanical shock,
excessive static electricity, abnormal sup-
ply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Unplug the AC adaptor from the AC out-
let.
2. Remove the battery.
3. Leave the unit completely unpowered for
approximately 30 seconds.
4. Plug the AC adaptor back into the AC
outlet and retry the operation.
If strange sounds, smell or smoke come out
of the unit or an object is dropped into the
unit, remove the AC adaptor from the AC
outlet immediately and contact an autho-
rized SHARP service center.
PROBLEM CAUSE
The unit does not turn
on.
● Is the AC adaptor disconnected?
● Is the battery exhausted?
● Is the unit in the hold mode?
● Has condensation formed inside the unit?
● Is the unit being influenced by mechanical shock or by
static electricity?
● Is the volume set too low?
● Is the headphones plugged in?
● Are you trying to play a MiniDisc with data on it instead
of a MiniDisc containing music?
● Is the unit in the hold mode?
● Is the battery exhausted?
● Is the battery exhausted?
● Is the unit being subjected to excessive vibration?
● Has the track number or character information been
written on the disc yet?
● Is the unit in the recording or editing mode?
● Is the MiniDisc protected against accidental erasure?
● Is the unit connected properly to the other equipment?
● Is the AC adaptor unplugged or did a power failure oc-
cur while recording or editing?
● Is the unit in the hold mode?
● Is an optical signal being output from the external equip-
ment?
Read the operation manual for the external equipment.
No sound is heard from
the headphones.
When the operation but-
tons are pressed, the
unit does not respond.
Some sounds are
skipped.
The MiniDisc cannot be
ejected.
Recording and editing
are impossible.
TROUBLESHOOTING
■ Moisture condensation
In the following cases, condensation
may form inside the unit.
● Shortly after turning on a heater.
● When the unit is placed in a room where
there is excessive steam or moisture.
● When the unit is moved from a cool
place to a warm place.
When the unit has condensation inside,
the disc signals cannot be read, and the
unit may not function properly.
● If this happens, remove the disc.
The condensation should evaporate in
approximately 1 hour. The unit will then
function properly.
If the hold function is active while the power
is turned off, the power cannot be turned
on by mistake and the battery will not be
accidentally drained.
CONVENIENT OPERATION OF THE UNIT
< How to read the battery indicator >
● When the battery is completely dis-
charged, the battery indicator will flash.
Recharge the battery or replace the al-
kaline batteries with new ones.
● When the battery has run completely out,
“BATT EMPTY” will appear. Then, the
power will be disconnected automatically.
Notes:
● When using the unit with alkaline bat-
teries or a rechargeable battery, the bat-
tery indicator will not correctly display
the remaining capacity for approximately
10 seconds after the power has been
turned on.
● When an AC adaptor or a car adaptor is
used, the battery indicator will not be
shown.
● The number of bars shown in the bat-
tery indicator may increase or decrease,
depending on the operation being per-
formed. This is normal.
■ To prevent the unit from being
operated by mistake
To avoid accidental operation of the unit,
use the hold function.
Move the HOLD switch to the safety posi-
tion (direction indicated by the arrow).
● When the unit is in the hold mode, press-
ing the buttons will have no affect.
● To cancel the hold mode, move the
HOLD switch away from the safety po-
sition (the opposite direction of the ar-
row).
Battery indicator
Since the battery level is very low, you
cannot start recording or editing.
When the battery
level is high
When the battery
level is very low
■ Checking the remaining amount
of battery level
The remaining amount of battery level is
shown by the battery indicator (
) dur-
ing operation.