Maintenance; Troubleshooting - JVC KD-G421 Instructions Manual

Maintenance

How to clean the connectors
Frequent detachment will deteriorate the
connectors.
To minimize this possibility, periodically wipe
the connectors with a cotton swab or cloth
moistened with alcohol, being careful not to
damage the connectors.
Connector
Moisture condensation
Moisture may condense on the lens inside the
CD player in the following cases:
• After starting the heater in the car.
• If it becomes very humid inside the car.
Should this occur, the CD player may
malfunction. In this case, eject the disc and
leave the unit turned on for a few hours until
the moisture evaporates.
How to handle discs
When removing a disc from
its case, press down the center
holder of the case and lift the disc
out, holding it by the edges.
• Always hold the disc by the
edges. Do not touch its recording surface.

Troubleshooting

What appears to be trouble is not always serious. Check the following points before calling a service
center.
Symptoms
• Sound cannot be heard from the
speakers.
• The unit does not work at all.
• SSM automatic presetting does not
work.
• Static noise while listening to the
radio.
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When storing a disc into its case, gently insert
the disc around the center holder (with the
printed surface facing up).
• Make sure to store discs into the cases after
use.
To keep discs clean
A dirty disc may not play correctly.
If a disc does become dirty, wipe it
with a soft cloth in a straight line
from center to edge.
• Do not use any solvent (for example,
conventional record cleaner, spray, thinner,
benzine, etc.) to clean discs.
To play new discs
New discs may have some rough
spots around the inner and outer
edges. If such a disc is used, this
unit may reject the disc.
To remove these rough spots, rub the edges
with a pencil or ball-point pen, etc.
Do not use the following discs:
Warped disc
Center holder
Remedies/Causes
• Adjust the volume to the optimum level.
• Check the cords and connections.
Reset the unit (see page 2).
Store stations manually.
Connect the aerial firmly.
Sticker
Sticker residue
Stick-on label