Sony KV-HF21M80 service manual Troubleshooting

Symptom Good picture

No sound

Solutions		Possible cause
• Press ¸ + to increase the volume level.	•	The volume level is too low.
• Press ¤ to cancel the muting.	•	The sound is muted.

Troubleshooting (continued)
Symptom	Solutions	Possible cause
	• Press SELECT until “PIC ROTATION”
Picture slant		• The terrestrial magnetism
(KV-XF21M83/	appears on the screen, then press + or –
		affects your TV set.
XF21M80 only)	to align the picture to the TV screen.
	(page 13)

Dotted lines or stripes	•	Do not use a hair dryer or other	• There is local interference
		equipment near the TV.	from cars, neon signs, hair
	• Adjust the antenna direction for		dryers, power generators,
		minimum interference. Contact a Sony	etc.
		dealer for advice.

Lines moving across the	• Use the fine tuning (FINE) function.
TV screen.	(page 11)
The uindicator on your	• Contact your nearest Sony service
TV flashes red a number	center. (page 19)
of times between

•There is interference from external sources, e.g., heavy machineries, nearby broadcast station.

•Your TV may need service.

– 17 –

Double images or “ghosts”

No color

• Use a highly directional antenna.	• Broadcast signals are
• Use the fine tuning (FINE) function.	reflected by nearby
	mountains or buildings.
(page 11)
• Adjust the antenna direction. Contact a	• The antenna direction is
Sony dealer for advice.	inappropriate.
• Turn off or disconnect the booster if it is	• Use of a booster is
in use.	inappropriate.
• Press SELECT until “COLOR” appears	• The color level setting is
on the screen, then press + or – to adjust	too low.
the color level. (page 16)
• Press SELECT until “COL SYS ” appears	• The color system setting is
on the screen, then check the color	inappropriate.
system setting (usually set this to
“AUTO”). (page 11)

3-second intervals.

TV cabinet creaks.

—

A “boom” sound is heard

when the TV is turned on.

—

•Changes in room temperature sometimes make the TV cabinet expand or contract, making a noise. This does not indicate a malfunction.

•The TV’s demagnetizing function is working. This does not indicate a malfunction.

Abnormal color patches

•Adjust the antenna direction. Contact a Sony dealer for advice.

•Keep external speakers or other electrical equipment away from the TV. Do not move the TV while the TV is turned on. Press U (main power) on the TV to turn off the TV for about five minutes, then turn it on again.

•The antenna direction is inappropriate.

•The magnetic disturbance from external speakers or other equipment, or the direction of the earth’s magnetic field may affect the TV.

continued
	21	22	Additional Information
Additional Information

KV-HF21M80

RM-952