Self Diagnosis Function - Sony KV-PF21M70 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 u indicator flashes red a number of times between 3-second
intervals.
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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u indicator
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
Snowy picture • Check the antenna cable and connection
on the TV, VCR and on the wall. (page 4)
• Press SELECT until "MANUAL
PROGRAM" appears on the screen then
preset the channel again. (page 9)
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, check the TV system (TV SYS)
setting (page 10), then press AUTO
PROGR to preset the channels again
(page 8).
• If the sound of some channels are noisy,
Noisy sound
select the channel, then select the
appropriate TV system (TV SYS).
(page 10)
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 for about five seconds, then
No sound
turn it on again.
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Additional Information
Solutions 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 or
channel presetting is
inappropriate or
incomplete.
• The power cord, antenna
or VCR is not connected.
• The TV is not turned on.