Read Sharp CD-DVD500 (serv.man22) Service Manual online
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CD-DVD500H
Troubleshooting chart
Many potential “problems” can be resolved by the owner without calling a service tech-
nician. If something is wrong with this product, check the following before calling your
authorised SHARP dealer or service centre.
nician. If something is wrong with this product, check the following before calling your
authorised SHARP dealer or service centre.
General
Symptom
The clock is not accurate.
When a button is pressed, the unit
does not respond.
does not respond.
No sound is heard.
The balance between the left and
right channels is bad.
right channels is bad.
Hum or excessive noise.
No sound is heard, or the sound
is too low, from the centre or sur-
round speakers.
is too low, from the centre or sur-
round speakers.
The timer indicator is flashing.
Possible cause
Did a power failure occur?
Reset the clock.
Reset the clock.
Set this unit to the power stand-by mode
and then turn it back on.
If the unit still malfunctions, reset it.
and then turn it back on.
If the unit still malfunctions, reset it.
Is the volume level set to “0”?
Are the headphones connected?
Are the speaker wires disconnected?
Are the headphones connected?
Are the speaker wires disconnected?
Are the front and surround speakers
connected to the wrong channels?
If an external unit is connected, are the left
and right channels connected improperly?
connected to the wrong channels?
If an external unit is connected, are the left
and right channels connected improperly?
Is the speaker lead plugged in incorrectly?
Does the speaker lead run past other
electronic equipment?
Are the plugs or terminals dirty?
Does the speaker lead run past other
electronic equipment?
Are the plugs or terminals dirty?
Is the “speaker size” item set to “NO” in
the “setup” operation (page 42)?
Is the volume too low?
the “setup” operation (page 42)?
Is the volume too low?
Is the speaker wire shorted?
Was the unit used at high volume for
many hours?
Was the unit used at high volume for
many hours?
Remote control
Symptom
The remote control does not op-
erate.
erate.
Possible cause
Is the AC power lead of the unit un-
plugged?
Is the battery polarity wrong?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive
strong light?
plugged?
Is the battery polarity wrong?
Are the batteries dead?
Is the distance or angle incorrect?
Does the remote control sensor receive
strong light?
Tuner
Symptom
Radio makes constant unusual
noise or static.
noise or static.
Possible cause
Is the unit placed near the TV or com-
puter?
Is the FM aerial or AM loop aerial placed
improperly?
Move the AC power lead away from the
aerial if located near.
puter?
Is the FM aerial or AM loop aerial placed
improperly?
Move the AC power lead away from the
aerial if located near.
Cassette deck
Symptom
Cannot record.
Cannot record tracks with proper
sound quality.
Cannot erase completely.
sound quality.
Cannot erase completely.
Sound skipping.
Cannot hear treble.
Sound fluctuation.
Cannot hear treble.
Sound fluctuation.
Cannot remove the tape.
Possible cause
Is the erase-protection tab removed?
Is it a normal tape?
(You cannot record on a metal or CrO
(You cannot record on a metal or CrO
2
tape.)
Is there any slack?
Is the tape stretched?
Are the capstans, pinch rollers, or heads
dirty?
Is the tape stretched?
Are the capstans, pinch rollers, or heads
dirty?
If a power failure occurs during playback,
the heads remain engaged with the tape.
Do not open the compartment forcibly.
Wait until electricity resumes.
the heads remain engaged with the tape.
Do not open the compartment forcibly.
Wait until electricity resumes.
DVD/CD player
Symptom
No image from the DVD video
appears on the screen of a con-
nected device.
appears on the screen of a con-
nected device.
Playback does not start.
Playback stops in the middle or is
not performed properly.
Playback stops in the middle or is
not performed properly.
Playback sounds are skipped, or
stopped in the middle of a track.
stopped in the middle of a track.
Possible cause
Make sure the channel of the connected
TV is set to VIDEO or AV.
Make sure video cables are connected
correctly.
TV is set to VIDEO or AV.
Make sure video cables are connected
correctly.
Is the disc loaded upside down?
Does the disc dissatisfy the standards?
Is the disc distorted or scratched?
Does the disc dissatisfy the standards?
Is the disc distorted or scratched?
Is the unit located near excessive vibrations?
Is the disc very dirty?
Has condensation formed inside the unit?
Is the disc very dirty?
Has condensation formed inside the unit?
When timer indicator is flashing
When only TIMER indicator is flashing (other indicators have gone out), the unit is
overheated.
Due to a problem in the speaker circuit, the unit will enter the stand-by mode automati-
cally.
In this case, take the following corrective
actions.
overheated.
Due to a problem in the speaker circuit, the unit will enter the stand-by mode automati-
cally.
In this case, take the following corrective
actions.
1
. Unplug the AC power plug from the AC
socket.
2
. Make sure that the unit vent is not blocked.
3
. Make sure that the speaker wires have
been correctly connected to the speaker
terminals.
terminals.
4
. After checking items 2 and 3 above, wait
for 2 or 3 hours before trying to use the
unit.
unit.
5
. Reconnect the AC power lead.
The higher volume causes to flash the timer indicator. If it happens, lower the
volume.
volume.
Before transporting the unit
1.
Press the ON/STAND-BY button to turn the power on.
2.
Press the DVD/CD button.
3.
Press the
OPEN/CLOSE button to open
the disc tray.
Remove all discs from the unit.
Remove all discs from the unit.
4.
Press the
OPEN/CLOSE button to close
the disc tray.
Make sure that “NO DISC” is displayed.
Make sure that “NO DISC” is displayed.
5.
Press the ON/STAND-BY button to enter the
stand-by mode, “GOOD-BYE” is displayed.
stand-by mode, “GOOD-BYE” is displayed.
6.
When “GOOD-BYE” disappears, unplug
the AC power lead from the AC socket.
the AC power lead from the AC socket.
7.
Insert the transport screw into the back of
the unit and tighten it with a flat-blade
screwdriver.
the unit and tighten it with a flat-blade
screwdriver.
Condensation
Sudden temperature changes, storage or operation in an extremely humid environ-
ment may cause condensation inside the cabinet (DVD/CD pickup, tape heads, etc.)
or on the transmitter on the remote control.
Condensation can cause the unit to malfunction.
If this happens, leave the power on with no disc (or cassette) in the unit until normal
playback is possible (about 1 hour). Wipe off any condensation on the transmitter with
a soft cloth before operating the unit.
ment may cause condensation inside the cabinet (DVD/CD pickup, tape heads, etc.)
or on the transmitter on the remote control.
Condensation can cause the unit to malfunction.
If this happens, leave the power on with no disc (or cassette) in the unit until normal
playback is possible (about 1 hour). Wipe off any condensation on the transmitter with
a soft cloth before operating the unit.
If trouble occurs
When this product is subjected to strong external interference (mechanical shock, ex-
cessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is oper-
ated incorrectly, it may malfunction.
cessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is oper-
ated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Set the unit to the stand-by mode and turn the power on again.
2. If the unit is not restored in the previous operation, unplug and plug in the
2. If the unit is not restored in the previous operation, unplug and plug in the
unit, and then turn the power on.
Note:
If neither operation above restores the unit, clear all the memory by resetting it.
If neither operation above restores the unit, clear all the memory by resetting it.
Clearing all the memory (reset)
1
. Press the ON/STAND-BY button to enter the power stand-by mode.
2
. Whilst pressing down the
button and X-BASS/DEMO button, press the
ON/STAND-BY button until “CLEAR AL” appears.
Caution:
This operation will erase all data stored in memory including clock, timer settings and
tuner preset.
tuner preset.
Troubleshooting chart
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