Read Sony KV-TF21M80 (serv.man3) Service Manual online
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18
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KV
-TF21M80
-TF21M80
RM-952
23
Additional Information
Possible cause
Symptom
Solutions
continued
Good picture
No sound
Dotted lines or stripes
Double images or
“ghosts”
No color
Abnormal color patches
TV cannot receive stereo
broadcast signal
(KV-XF21M93 only)
• Press ¸ + to increase the volume level.
• Press ¤ to cancel the muting.
• Press A/B
H until a better sound is
heard. (KV-XF21M93 only) (page 19)
• Do not use a hair dryer or other
equipment near the TV.
• Adjust the antenna direction for
minimum interference. Contact a Sony
dealer for advice.
dealer for advice.
• Use a highly directional antenna.
• Use the fine tuning (FINE) function.
• Use the fine tuning (FINE) function.
(page 11)
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Turn off or disconnect the booster if it is
in use.
• Press SELECT until “COLOR” appears
on the screen, then press + or – to adjust
the color level. (page 16)
the color level. (page 16)
• Press SELECT until “COL SYS ” appears
on the screen, then check the color
system setting (usually set this to
“AUTO”). (page 11).
system setting (usually set this to
“AUTO”). (page 11).
• 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.
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.
• Press A/B
H until “AUTO” appears
on the screen. (page 19)
• The volume level is too low.
• The sound is muted.
• Broadcast signal has a
transmission problem.
• There is local interference
from cars, neon signs, hair
dryers, power generators,
etc.
dryers, power generators,
etc.
• Broadcast signals are
reflected by nearby
mountains or buildings.
mountains or buildings.
• The antenna direction is
inapproprite.
• Use of a booster is
inappropriate.
• The color level setting is
too low.
• The color system setting is
inappropriate.
• The antenna direction is
inapproriate.
• The magnetic disturbance
from external speakers or
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
• The stereo reception
setting is inappropriate.
24
Additional Information
Stereo broadcast sound
switches on and off or is
distorted.
or
The sound switches
between monaural and
stereo frequently.
(KV-XF21M93 only)
Picture slant
Lines moving across the
TV screen.
The
u
indicator on your
TV flashes red a number
of times between
3-second intervals.
TV cabinet creaks.
A “boom” sound is heard
when the TV is turned on.
Troubleshooting (continued)
Possible cause
Symptom
Solutions
• Check the antenna cable and connection
on the TV, VCR and on the wall. (page 4)
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Press A/B
until a better sound is
heard. (page 19)
• Keep external speakers or other
electrical equipment away from the TV.
• Press SELECT until “PIC ROTATION”
appears on the screen, then press + or –
to align the picture to the TV screen.
(page 13)
to align the picture to the TV screen.
(page 13)
• Use the fine tuning (FINE) function.
(page 11)
• Contact your nearest Sony service
center. (page 21)
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• Connection is loose or the
cable is damaged.
• The antenna direction is
inappropriate.
• Broadcast signal has a
transmission problem.
• The magnetic disturbance
from external speakers or
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
other equipment, or the
direction of the earth’s
magnetic field may affect
the TV.
• There is interference from
external sources, e.g.,
heavy machineries, nearby
broadcast station.
heavy machineries, nearby
broadcast station.
•Your TV may need service.
• Changes in room
temperature sometimes
make the TV cabinet
expand or contact, making
a noise. This does not
indicate a malfunction.
make the TV cabinet
expand or contact, making
a noise. This does not
indicate a malfunction.
• The TV’s demagnetizing
function is working. This
does not indicate a
malfunction.
does not indicate a
malfunction.
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