Self Diagnosis Function - Sony TRINITRON KV-XF25M21 Service Manual

Additional Information
Self-diagnosis
function
Your TV is equipped with a self-diagnosis function. If there is a
problem with your TV, the u indicator flashes red. The number of
times the u indicator flashes indicates the possible causes.
Front of TV
1
Check that the red flashes of the u indicator is about 3 seconds per interval.
2
Count the number of times the u indicator flashes.
3
Press U (main power) to turn off your TV.
4
Inform your nearest Sony service center about the number of times the u
indicator flashes.
Be sure to note the model name and serial number located on the rear of
your TV.
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Additional Information
Troubleshooting
If you find any problem while viewing your TV, please check the following guide. If
any problem persists, contact your Sony dealer .
Symptom
Solutions
Snowy picture • Check the antenna cable and connection
on the TV, VCR and on the wall.
(page 4)
• Display the CH PRESET menu and
select "MANUAL PROGRAM" to preset
the channel again. (page 24)
Noisy sound
• Check the antenna type (VHF/UHF).
Contact a Sony dealer for advice.
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Try using a booster.
• Turn off or disconnect the booster if it is
Distorted picture
in use.
Noisy sound
Good picture
• If the sound of all the channels are noisy,
display the CH PRESET menu and select
the appropriate TV system (page 25),
then select "AUTO PROGRAM" to
preset the channels again. (page 27)
• If the sound of some channels are noisy,
Noisy sound
select the channel, then display the CH
PRESET menu and select the
appropriate TV system. (page 25)
No picture
• Check the power cord, antenna and the
VCR connections.
• Press u (power).
• Press U (main power) on the TV to turn
off the TV about five seconds, then turn
No sound
it on again.
Possible cause
• Connection is loose or the
cable is damaged.
• Channel presetting is
inappropriate or
incomplete.
• The antenna type is
inappropriate.
• The antenna direction is
inappropriate.
• Signal transmission is low.
• Broadcast signals are too
strong.
• The TV system setting is
inappropriate.
• The power cord, antenna
or VCR is not connected.
• The TV is not turned on.
continued
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Additional Information