Troubleshooting Chart - Sharp CD-DVD500 Service Manual

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.
General
Symptom
The clock is not accurate.
When a button is pressed, the unit
does not respond.
No sound is heard.
The balance between the left and
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.
The timer indicator is flashing.
Troubleshooting Chart
Tuner
Symptom
Radio makes constant unusual
noise or static.
Cassette deck
Symptom
Cannot record.
Cannot record tracks with proper
sound quality.
Cannot erase completely.
Sound skipping.
Cannot hear treble.
Sound fluctuation.
Cannot remove the tape.
Remote control
Symptom
The remote control does not op-
erate.
Possible cause
Did a power failure occur?
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.
Is the volume level set to "0"?
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 im-
properly?
Is the speaker lead plugged in i ncor-
rectly?
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?
Is the volume too low?
Is the speaker wire shorted?
Was the unit used at high volume for
many hours?
Possible cause
Is the unit placed near the TV or com-
puter?
Is the FM/AM loop aerial placed improp-
erly?
Move the AC power lead away from the
aerial if located near.
Possible cause
Is the erase-protection tab removed?
Is it a normal tape?
(You cannot record on a metal or CrO
tape.)
Is there any slack?
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.
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?
DVD/CD player
Symptom
No i mage from the DVD video
appears on the screen of a con-
nected device.
Playback does not start.
Playback stops in the middle or is
not performed properly.
Playback sounds are skipped, or
stopped in the middle of a track.
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.
2
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.
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
unit, and then turn the power on.
Note:
If neither operation above restores the unit, clear all the memory by resetting it.
– 7 –
CD-DVD500
Possible cause
Make sure the channel of the connected
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?
Is the unit located near excessive vibra-
tions?
Is the disc very dirty?
Has condensation formed inside the
unit?