Sony KV-G21MW3 Service Manual ▷ View online
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9
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KV
-G21MW3/G21QW3
-G21MW3/G21QW3
RM-869
Additional Information
11
-EN
Troubleshooting
No picture
No sound
No sound
/ Press
U
or
u
.
/ Check the antenna connection.
/ Check the VCR connections.
/ Check the power cord connection.
/ Check the standby mode.
/ Check the VCR connections.
/ Check the power cord connection.
/ Check the standby mode.
Good picture
No sound
No sound
/ Press
.
+.
/ Press
¤
.
No color
/ Adjust the COLOR level in the on-screen
display.
/ Check the COLOR SYSTEM setting.
TV cabinet creaks
/ Even if the picture or the sound is normal,
changes in the room temperature
sometimes make the TV cabinet expand or
contract, making a noise. This does not
indicate a malfunction.
sometimes make the TV cabinet expand or
contract, making a noise. This does not
indicate a malfunction.
Note on the remote commander
•
The supplied remote commander is used on several models of
the TV. If you do not find instructions for some controls that
are on the remote commander, that means your TV does not
employ the features of those controls, e.g.
the TV. If you do not find instructions for some controls that
are on the remote commander, that means your TV does not
employ the features of those controls, e.g.
L
and SOUND
MODE.
Notes
•
When you turn on the TV, you may hear the “boon” sound
that is caused by the demagnetization of the TV. This does not
indicate a malfunction.
that is caused by the demagnetization of the TV. This does not
indicate a malfunction.
•
The picture color may become abnormal if you change the
direction of your TV. To obtain the normal picture color, press
direction of your TV. To obtain the normal picture color, press
U
on the TV to turn off the TV for five minutes and then turn
it on again.
•
Design and specifications are subject to change without notice.
•
All contents in the instruction manual are subject to change
without notice.
without notice.
WARNING
Do not install the appliance in a confined space, such as
a bookcase or built-in cabinet.
Do not install the appliance in a confined space, such as
a bookcase or built-in cabinet.
If you have any problems, read this manual again and
check the countermeasure for each of the symptoms
listed below.
If the problem persists after trying the methods below,
contact your nearest authorized service center or dealer.
check the countermeasure for each of the symptoms
listed below.
If the problem persists after trying the methods below,
contact your nearest authorized service center or dealer.
Snowy picture
Noisy sound
Noisy sound
/ Check the antenna.
/ Check the antenna connection on the TV
/ Check the antenna connection on the TV
and on the wall.
/ Check the TV SYSTEM setting (for
KV-G21MW3 only).
Dotted lines or stripes
/ This may be caused by local interference
(e.g. cars, neon signs and hair dryers).
Adjust the antenna for minimum interference.
Adjust the antenna for minimum interference.
Double images or “ghosts”
/ This may be caused by reflections from
nearby mountains or buildings. A highly
directional antenna may improve the
picture.
directional antenna may improve the
picture.
Good picture
Noisy sound
Noisy sound
/ Check the TV SYSTEM setting (for
KV-G21MW3 only).
Additional Information
Operations
10
-EN
Adjusting the
picture
picture
Each time you press SELECT, the screen changes as
follows:
follows:
2
Press +/– to adjust the item.
3
To adjust other items, repeat steps 1 and 2.
Note
•
You can also use SELECT and
.
+/– on the TV to adjust the
picture setting.
If the picture color is abnormal when receiving
programs through the
programs through the
˘
(antenna) terminal
Change the “TV SYSTEM” (for KV-G21MW3 only) or
“COLOR SYSTEM” setting or adjust the “COLOR”
level in the on-screen display until the color becomes
normal.
“COLOR SYSTEM” setting or adjust the “COLOR”
level in the on-screen display until the color becomes
normal.
If the picture is abnormal when receiving
programs through the
programs through the
…
(video input) jack
Change the “COLOR SYSTEM” setting or adjust the
“COLOR” level in the on-screen display until the color
becomes normal.
“COLOR” level in the on-screen display until the color
becomes normal.
Note
•
Normally set “COLOR SYSTEM” to “AUTO”.
If the sound is distorted or noisy when
receiving programs through the
receiving programs through the
˘
(antenna)
terminal
Change the “TV SYSTEM” setting (for KV-G21MW3
only) in the on-screen display until the sound becomes
clear.
Change the “TV SYSTEM” setting (for KV-G21MW3
only) in the on-screen display until the sound becomes
clear.
Note on the SOUND MODE button
•
The sound mode feature is unavailable for your TV. Thus, the
SOUND MODE button on the remote commander is not used
for your TV.
SOUND MODE button on the remote commander is not used
for your TV.
Selecting the picture mode
Press PIC MODE until the mode you want
appears.
appears.
Each time you press PIC MODE, the screen changes as
follows:
follows:
Note
•
If you change the picture mode after the following
adjustments, the adjustment changes in accordance with the
picture mode.
adjustments, the adjustment changes in accordance with the
picture mode.
Adjusting the picture setting
1
Press SELECT until the item you want to
adjust appears.
adjust appears.
÷
0
SOUND
MODE
SELECT
PIC MODE
PIC MODE
PIC MODE
High contrast
picture
picture
Soft picture
(good for video
games)
(good for video
games)
DYNAMIC
STANDARD
SOFT
+/–
SELECT
PICTURE
COLOR
BRIGHT
HUE
SHARPNESS
(Operative for
NTSC signal
only)
NTSC signal
only)
…
SELECT
–
PROGR
+
–
.
+
Front of TV
Normal
picture
picture
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10
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KV
-G21MW3/G21QW3
-G21MW3/G21QW3
RM-869
2-1.
REAR COVER REMOVAL
2-2.
A BOARD REMOVAL
2-3.
SERVICE POSITION
SECTION 2
DISASSEMBLY
Four screws
(BVTP 4
(BVTP 4
×
16)
1
2 Two screws
(BVTP 4
×
16)
Lever
Lever
A board
A board
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11
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KV
-G21MW3/G21QW3
-G21MW3/G21QW3
RM-869
2-4.
REPLACEMENT OF PARTS
For replacement of the Multi Button and Light Guide, cut the welded portions
from them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
from them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
2-4-1. REPLACEMENT OF MULTI BUTTON
2-5.
TERMINAL BOARD BRACKET REMOVAL
2-6.
DEMAGNETIZATION COIL REMOVAL
Two claws
A board
Terminal board bracket
A board
Terminal board bracket
1 Demagnetization coil
2
Tension spring
Picture tube
Cut
Cut
Multi button
Multi button
Three screws
(BVTP 3
(BVTP 3
×
12)
•
SCREWING TORQUE
7
±
1 kg•cm
2-4-2. REPLACEMENT OF LIGHT GUIDE
Light guide
Cut
Cut
Light guide
Two screws
(BVTP 3
(BVTP 3
×
12)
•
SCREWING TORQUE
7
±
1 kg•cm
–
12
–
KV
-G21MW3/G21QW3
-G21MW3/G21QW3
RM-869
2-7.
PICTURE TUBE REMOVAL
2
Using a thumb press down, then pull up the rubber cap firmly in the direction indicated
by the arrow
by the arrow
b
.
3
When one side of the rubber cap is separated from the anode button, the anode-cap
can be removed by turning up the rubber cap and pulling it up in the direction of the
arrow
can be removed by turning up the rubber cap and pulling it up in the direction of the
arrow
c
.
•
HOW TO HANDLE AN ANODE-CAP
1
Do not damage the surface of anode-cap with sharp shaped objects.
2
Do not press the rubber too hard so as not to damage the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built into the rubber.
A metal fitting called the shatter-hook terminal is built into the rubber.
3
Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the rubber.
The shatter-hook terminal will stick out or damage the rubber.
•
REMOVAL OF ANODE-CAP
NOTE : After removing the anode, short circuit the anode of the picture tube and the
anode cap to the metal chassis, CRT shield or carbon paint on the CRT.
•
REMOVING PROCEDURES
1
Turn up one side of the rubber cap in the direction indicated by the arrow
a
.
2
A board
4
C board
5
Deflection yoke
Cushion
6
Four screws
(Tapping screws)
1
Anode cap
a
a
b
b
c
Anode button
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