DOWNLOAD Sony KV-XF21M80 (serv.man3) Service Manual ↓ Size: 881.72 KB | Pages: 46 in PDF or view online for FREE

Model
KV-XF21M80 (serv.man3)
Pages
46
Size
881.72 KB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-xf21m80-sm3.pdf
Date

Sony KV-XF21M80 (serv.man3) Service Manual ▷ View online

– 16 –
KV
-XF21M80/XF21M8J
RM-952
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. (page 4)
• Press SELECT until “MANUAL
PROGRAM” appears on the screen then
preset the channel again. (page 9)
• 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, press AUTO PROGR to preset the
channels again. (page 8)
• If the sound of some channels are noisy,
select the channel, then select the
appropriate TV system. (page 9)
• 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
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 TV system setting is
inappropriate.
• The power cord, antenna
or VCR is not connected.
• The TV is not turned on.
continued
Additional Information
20
Additional Information
Troubleshooting (continued)
Possible cause
Symptom
Solutions
• Press ¸ + to increase the volume level.
• Press ¤ to cancel the muting.
• 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.
(page 10)
• 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 15)
• Press SELECT until “COL SYS ” appears
on the screen, then check the color
system setting (usually set this to
“AUTO”). (page 10).
• 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 volume level is too low.
• The sound is muted.
• 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
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.
• There are magnetic effects
from external speakers or
other electrical equipment
that may affect the TV.
• The direction of the earth’s
magnetic field may affect
the TV.
Good picture
No sound
Dotted lines or stripes
Double images or
“ghosts”
No color
Abnormal color patches
– 17 –
KV
-XF21M80/XF21M8J
RM-952
21
Additional Information
Possible cause
Symptom
Solutions
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.
• Press SELECT until “PIC ROTATION”
appears on the screen, then press + or –
to align the picture to the TV screen.
(page 12)
• Use the fine tuning (FINE) function.
(page 10)
• Contact your nearest Sony service
center.
• The terrestrial magnetism
affects your TV set.
• 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.
22
Additional Information
Identifying parts and controls
Refer to the pages indicated in parentheses ( ) for details.
Front panel
1
U
 (main power) button (11)
2 PROGR +/– (program) buttons (11)
3
¸
 +/– (volume) buttons (11)
4
 (TV/video) button (12)
5 AUTO PROGR (program) button (5)
6 SELECT button (10)
7
2
 (headphone) jack
ONE-PUSH  AUTOMATIC  PROGRAMING
ONE-PUSH  AUTOMATIC  PROGRAMMING
2
– 18 –
KV
-XF21M80/XF21M8J
RM-952
23
Additional Information
Remote Control
9
!™
!∞
TV
1
2
3
4
6
7
8
9
÷
0
5
JUMP
SOUND 
MODE
 
FAVORITE
PROGR
SELECT 
p
PIC MODE 
p
Á
TV
1
2
3
4
6
7
8
9
÷
0
5
JUMP
SOUND 
MODE
 
FAVORITE
PROGR
SELECT 
p
PIC MODE 
p
Á
Button function
For general TV operations
For Teletext operations
1 u (power) button (11)
2 ; (TV) button (12)
3 Number buttons (11)
4 JUMP button (12)
5 PROGR +/– buttons (11)
6 SELECT button (9)
7 PIC MODE button (14)
8 +/– buttons (9)
9
(display) button (12)
!º ¤ (muting) button (12)
!¡ … (video) button (12)
!™ . +/– (volume) buttons (11)
!£ A/B button
(not used for these models)
!¢ Timer setting buttons (13)
(wake up timer)
(sleep timer)
!∞ FAVORITE button (16)
!§ SOUND MODE button (14)
!¶ Teletext operation buttons
(not used for these models)
 (text)
 (enlarge)
 (reveal)
 (hold)
 (index)
 (text clear)
p
 (FASTEXT: red, green, yellow, blue)
Names/symbols of buttons on the
remote are indicated in different
colors to represent the available
functions.
Label color
White
Green
1
2
3
4
5
6
7
8
– 19 –
KV
-XF21M80/XF21M8J
RM-952
SECTION 2
DISASSEMBLY
2-2. CHASSIS ASSY REMOVAL
1
 Chassis assy
Lever
Lever
2-1. REAR COVER REMOVAL
1
 Four screws
     (+BVTP 4 
× 
16)
1
 One screw
     (+BVTP 4 
× 
16)
2
 Rear cover
2-3. F BRACKET REMOVAL
3
 One screw
     (+BVTP 3 
× 
12)
1
 Three connectors
2
 F board
Lever
2-4. SERVICE POSITION
(Note: Remove F Bracket first.)
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