DOWNLOAD Sony KV-XA21M30 Service Manual ↓ Size: 7.9 MB | Pages: 83 in PDF or view online for FREE

Model
KV-XA21M30
Pages
83
Size
7.9 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xa21m30.pdf
Date

Sony KV-XA21M30 Service Manual ▷ View online

 25 
KV
-XA21M30/XA21M63
RM-952
KV
-XA21N90
RM-915
Additional Information
24
Snowy picture
Noisy sound
Distorted picture
Noisy sound
Good picture
Noisy sound
No picture
No sound
Troubleshooting
If you find any problem while viewing your TV, please check the following guide.
If any problem persists, contact your Sony dealer.
Possible cause
Symptom
Solutions
• 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 selected sound is
inappropriate.
• The power cord,
antenna or VCR is not
connected.
• The TV is not turned
on.
4
11
10
11
21
4
14
13
• Check the antenna cable and connection
on the TV, VCR and on the wall.
• Press SELECT until “MANUAL
PROGRAM” appears on the screen, then
preset the channel again.
• 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 in
use.
• If the sound of all the channels are noisy,
check the TV system (TV SYS) setting,
then press AUTO PROGR to preset the
channels again.
• If the sound of some channels are noisy,
select the channel, then select the
appropriate TV system (TV SYS).
• If the sound of some channels are noisy,
select the channel, then press A/B to select
the main sound.
• Check the power cord, antenna and the
VCR connections.
• Press ?/1 (power).
• Press ! (main power) on the TV to turn
off the TV for about five seconds, then
turn it on again.
Page
(except KV-XA21N90)
Additional Information
25
13
14
21
12
17
12
21
Good picture
No sound
Dotted lines or
stripes
Double images or
“ghosts”
No color
Abnormal color
patches
TV cannot receive
stereo broadcast
signal
• Press 2 + to increase the volume level.
• Press % to cancel the muting.
• Press A/B until a better sound is heard.
• 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.
• Use a highly directional antenna.
• Use the fine tuning (FINE) function.
• 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.
• Press SELECT until “COLOR SYS ”
appears on the screen, then check the
color system setting (usually set this to
“AUTO”).
• 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 ! (main power) on the TV to turn
off the TV for about five minutes, then
turn it on again.
• Press A/B until “AUTO” appears
on the screen.
Possible cause
Symptom
Solutions
• 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.
• Broadcast signals are
reflected by nearby
mountains or
buildings.
• The antenna direction
is inappropriate.
• Use of a booster is
inappropriate.
• The color level setting
is too low.
• The color system
setting is
inappropriate.
• 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.
• The stereo reception
setting is
inappropriate.
Page
continued
 26 
KV
-XA21M30/XA21M63
RM-952
KV
-XA21N90
RM-915
Additional Information
26
4
 21
14
12
23
Stereo broadcast
sound switches on
and off or is
distorted.
or
The sound switches
between monaural
and stereo
frequently.
(not used for this
model)
Picture slant
(KV-XA21M30 only)
Lines moving across
the TV screen.
The 1 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.
Possible cause
Symptom
Solutions
• 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.
• There is interference
from external sources,
e.g., heavy
machineries, nearby
broadcast station.
• Your TV may need
service.
• 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.
Page
• Check the antenna cable and connection
on the TV, VCR and on the wall.
• Adjust the antenna direction. Contact a
Sony dealer for advice.
• Press A/B until a better sound is heard.
•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.
• Use the fine tuning (FINE) function.
•Contact your nearest Sony service center.
Troubleshooting (continued)
19
Additional Information
Snowy picture
Noisy sound
Distorted picture
Noisy sound
Good picture
Noisy sound
No picture
No sound
Troubleshooting
If you find any problem while viewing your TV, please check the following guide. If
any problem persists, contact your Sony dealer .
Possible cause
Symptom
Solutions
• Check the antenna cable and connection
on the TV, VCR and on the wall.
• Preset the channel again.
• 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 in use.
• If the sound of all the channels are
noisy, then press AUTO PROGRAM to
preset the channels again.
• Check the power cord, antenna and the
VCR connections.
• Press POWER on the remote.
• Press POWER on the TV to turn off the
TV for about five seconds, then turn it
on again.
• 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.
• Channel presetting is
inappropriate or
incomplete.
• The power cord,
antenna or VCR is not
connected.
• The TV is not turned
on.
continued
Page
4
9
_
8
4
11
10
Additional Information
(KV-XA21N90)
 27 
KV
-XA21M30/XA21M63
RM-952
KV
-XA21N90
RM-915
20
Additional Information
Good picture
No sound
Dotted lines or stripes
Double images or
“ghosts”
No color
Abnormal color patches
TV cannot receive stereo
broadcast signal
Troubleshooting (continued)
Possible cause
Symptom
Solutions
• Press VOL + to increase the
volume level.
• Press MUTING to cancel the
muting.
• Press MTS until a better
sound is heard.
• 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.
• Use a highly directional
antenna.
• 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.
• 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 POWER on
the TV to turn off the TV for
about five minutes, then turn
it on again.
• Press MTS until a good sound
is heard.
• 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.
• Broadcast signals are
reflected by nearby
mountains or buildings.
• The antenna direction is
inappropriate.
• Use of a booster is
inappropriate.
• The color level setting is too
low.
• 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.
• The stereo reception setting
is inappropriate.
Page
10
11
17
_
_
14
_
_
17
21
Additional Information
Stereo broadcast sound
switches on and off or is
distorted.
or
The sound switches
between monaural and
stereo frequently.
The STANDBY 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.
Possible cause
Symptom
Solutions
• Check the antenna cable and
connection on the TV, VCR and
on the wall.
• Adjust the antenna direction.
Contact a Sony dealer for
advice.
• Press MTS until a good sound
is heard.
• Contact your nearest Sony
service center.
• Connection is loose or the
cable is damaged.
• The antenna direction is
inappropriate.
• Broadcast signal has a
transmission problem.
• Your TV may need service.
• 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.
Page
4
_
17
18
_
_
 28 
KV
-XA21M30/XA21M63
RM-952
KV
-XA21N90
RM-915
Additional Information
27
Overview of controls
TV front panel
Page
Function
Button
2
L(MONO)
R
PROGR
SELECT
AUTO
PROGR
2
L(MONO)
R
PROGR
SELECT
AUTO
PROGR
!
Preset channels automatically.
5
Select the desired item.
12
Select program number.
13
Turn off completely or turn on
13
the TV.
Adjust volume.
13
Standby indicator.
13
Select TV or video input.
14
Wake Up indicator.
15
Stereo indicator.
21
Headphone jack.
AUTO PROGR
SELECT
PROGR +/–
!
+/–
t
i
continued
1
(except KV-XA21N90)
Additional Information
28
Remote Control
The names/symbols of
buttons on the remote are
indicated in different colors to
represent the available
functions.
Label color
White
Green
Button function
For general TV
operations
For Teletext
operations
Page
Button
Function
Overview of controls (continued)
TV
1
2
3
4
6
7
8
9
0
5
JUMP
SOUND 
MODE
 
FAVORITE
PROGR
-
2
Select the desired item.
Adjust value.
Select program number.
Input numbers.
Adjust volume.
Turn off temporarily or turn on
the TV.
Select TV or video input.
Display the TV program.
Mute the sound.
Display on-screen information.
Jump to previous program
number.
Set TV to turn on automatically.
Set TV to turn off automatically.
Select picture mode.
Select sound mode.
Display favorite channels.
Select stereo/bilingual mode.
Display Teletext broadcast.
Display Teletext service
contents.
Stop Teletext display from
scrolling.
Reveal concealed information.
Enlarge the Teletext display.
Show TV screen while waiting
for Teletext page.
Access a FASTEXT menu.
11
11
13
13
13
13
14
14
14
14
14
15
15
16
16
19
21
23
24
24
24
24
24
24
SELECT
+/–
PROGR +/–
0 – 9, -
2
 +/–
?/
1
t
a
%
JUMP
Timer operations
PIC MODE
SOUND MODE
FAVORITE
A/B
Teletext operations
(Not used for this model)
x
 (red, green,
yellow, blue)
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