Sony KV-HF21M80 service manual Self-diagnosis function, Troubleshooting

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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

KV-HF21M80

RM-952

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	Possible cause

times the u indicator flashes indicates the possible causes.

Snowy picture

•	Check the antenna cable and connection	• Connection is loose or the
	on the TV, VCR and on the wall. (page 4)	cable is damaged.

Front of TV

Noisy sound

•Press SELECT until “MANUAL PROGRAM” appears on the screen then preset the channel again. (page 10)

•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.

•Channel presetting is inappropriate or incomplete.

•The antenna type is inappropriate.

•The antenna direction is inappropriate.

•Signal transmission is low.

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u indicator

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	AdditionalInformation
	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.

Distorted picture	• Turn off or disconnect the booster if it is	• Broadcast signals are too
	in use.	strong.
Noisy sound
Good picture	• If the sound of some channels are noisy,	• The TV system setting is
	select the channel, then select the	inappropriate.
	appropriate TV system (“TV SYS”).
	(page 10)
Noisy sound
No picture	• Check the power cord, antenna and the	• The power cord, antenna
	VCR connections.	or VCR is not connected.
	• Press u (power).	• The TV is not turned on.
	• Press U (main power) on the TV to turn
No sound	off the TV for about five seconds, then
	turn it on again.

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