Sony KV-G21L3 Service manual
SERVICE MANUAL
BG-1S (D)
CHASSIS
MODEL COMMANDER DEST. CHASSIS NO.
KV-G21L3 RM-883 ME SCC-J35Y-A
MODEL COMMANDER DEST. CHASSIS NO.
TRINITRON
®
COLOR TV
KV-G21L3
RM-883
Power requirements 110-240 V AC, 50/60 Hz
Power consumption (W) Indicated on the rear of the TV
Television system B/G
Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58 (AV IN)
Channel coverage VHF: E2 to E12/UHF: E21 to E69/CATV: S01 to S03, S1 to S41
Audio output (speaker) 3W
Inputs Antenna: 75 ohms
Outputs Earphone jack: minijack
Picture tube 21 in.
Dimensions (w/h/d, mm) 527 × 464 × 471
Mass (kg) 22
SPECIFICATIONS
Note
VIDEO IN jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500mVrms, high impedance
MONITOR OUT jacks: phono jacks
Video: 1 Vp-p, 75 ohms
Audio: 500 mVrms
Tube size (cm) 54 Measured diagonally
Screen size (cm) 51 Measured diagonally
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE
AND THE ANODE CAP TO THE METAL CHASSIS, CRT
SHIELD, OR CARBON PAINTED ON THE CRT, AFTER
REMOVING THE ANODE.
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
– 2 –
KV -G21L3
TABLE OF CONTENTS
Section Title Page Section Title Page
RM-883
1. GENERAL........................................................................ 4
2. DISASSEMBLY
2-1. Rear Cover Removal ................................................ 11
2-2. A Board Removal .................................................... 11
2-3. Service Position ....................................................... 11
2-4. Replacement of parts ............................................... 12
2-4-1. Replacement of Multi Button........................... 12
2-4-2. Replacement of Light Guide and Power Button
.................................................................. 12
2-5. Demagnetization Coil Removal .............................. 12
2-6. Picture Tube Removal.............................................. 13
3. SET-UP ADJUSTMENTS
3-1. Beam Landing .......................................................... 14
3-2. Convergence............................................................. 15
3-3. Focus Adjustment .................................................... 17
3-4. G2 (Screen) and White Balance Adjustment .......... 17
4. SELF DIAGNOSIS FUNCTION ................................ 18
5. CIRCUIT ADJUSTMENTS
5-1. Adjustment With Commander ................................. 19
5-2. Adjustment Method ................................................. 20
5-3. A Board, Adjustment After IC003
(MEMORY) Replacement....................................... 23
5-4. Picture Distortion Adjustment ................................. 23
6. DIAGRAMS
6-1. Block Diagram ......................................................... 25
6-2. Circuit Boards Location .......................................... 27
6-3. Schematic Diagrams and Printed Wiring Boards ... 27
(1) Schematic Diagram of A Board .............................. 31
(2) Schematic Diagram of C Board ............................. 35
6-4. Semiconductors........................................................ 37
7. EXPLODED VIEW......................................................... 39
8. ELECTRICAL PARTS LIST....................................... 41
– 3 –
KV-G21L3
2
M
O
NITO
R
OUT
AUDIO
VIDEO
VIDEO
IN
1
2
3
3
B/G
I D/K M
TV SYSTEM
AUTO PROGR
TV SYSTEM
AUTO PROGR
p KV-J21MF3
– 4 –
SECTION 1
The operating instructions mentioned here are partial abstracts from the
RM-883
Operating Instructions Manual. The page numbers of the Operating
GENERAL
Instruction Manual remain as in the manual.
Getting Started
-EN
4
M
O
N
IT
O
R
O
U
T
A
U
D
I
O
V
ID
E
O
V
ID
E
O
IN
Connections
Connecting a VHF antenna or a combination VHF/UHF antenna
— 75-ohm coaxial cable (round)
Attach an optional IEC antenna connector to the 75-ohm coaxial cable.
Plug the connector into the
(antenna) socket at the rear of the TV.
Getting Started
Rear of TV
Rear of TV
Connecting an indoor antenna
Note
• You are advised to use an outdoor antenna for better reception.
2
1
On a wall
or
3
Getting Started
5
-EN
EN
Connecting optional equipment
You can connect optional audio/video equipment to your TV such as a VCR, multi disc player, camcorder, video
game or stereo system.
Connecting video equipment using video input jacks
p KV-G21L3
When connecting a monaural VCR
Connect the yellow plug to VIDEO and the black plug to AUDIO-L (MONO).
p KV-G21L3
When using the video input jacks
Do not connect video equipment to the video input jacks at the front and the rear of your TV simultaneously; otherwise the pict
ure will
not be displayed properly on the screen.
to antenna
output
VIDEO IN
Rear of TV
to antenna socket
VIDEO
AUDIO
VIDEO
IN
MONITOR
OUT
: Signal flow
VCR
to video
and audio
outputs
Front of TV
VIDEO
VIDEO INPUT
AUDIO
Camcorder
to video and
audio outputs
: Signal flow
– 5 –
KV -G21L3
RM-883
KV-G21L3
Getting Started
-EN
6
Connecting audio/video equipment using MONITOR OUT jacks
When recording through the MONITOR OUT jacks
If you change the channel or video input while recording with a VCR, the channel or video input you are recording also will be
changed.
VIDEO
AUDIO
VIDEO
IN
MONITOR
OUT
Rear of TV
MONITOR OUT
p KV-G21L3
to video
and audio
inputs
to antenna socket
to antenna
output
VCR
or
Audio system
: Signal flow
Getting Started
7
-EN
Presetting channels
Presetting channels manually using the
buttons on the TV
1
Press MANUAL PROGR.
2
Press PROGR +/
– on the remote commander
until the required program position
appears on the screen.
3
Press TV SYSTEM until your local TV system
appears (KV-J21MF3 only).
4
Press VOLUME +/
– until the required channel
picture appears on the screen.
5
Press MANUAL PROGR.
If the TV system is not properly selected
(KV-J21MF3 only).
The color of the picture may be poor and/or the sound
may be noisy. In this case, select the appropriate TV
system.
1 Press PROGR +/– on the remote commander to
select the program position.
2 Press TV SYSTEM until the picture and sound
become normal.
Notes (KV-J21MF3 only).
• If you do not know your local TV system, consult your nearest
authorized service center or dealer.
• The setting of the TV SYSTEM is memorized for each program
position.
Disabling program positions using the
buttons on the TV
By disabling unused or unwanted program positions,
you can skip those positions when you press
PROGR +/– on the remote commander.
1
Press PROGR +/
– on the remote commander
until the unused or unwanted program
position appears on the screen.
2
Press MANUAL PROGR.
3
Press PIC MODE on the remote commander.
4
Press MANUAL PROGR.
To cancel the skip setting
Preset the channel manually or automatically again.
You can preset up to 100 TV channels in numerical
sequence from program position 1 automatically.
To change the channel for a particular program
position or to receive a channel with a weak signal,
you can preset the channel manually. You can also
disable program position.
You can preset TV channels using the buttons on the
TV or the remote commander.
Presetting channels automatically
using the buttons on the TV
Front of TV
1
Press POWER to turn on the TV.
When the TV is turned on in standby mode, press
POWER on the remote commander.
2
Press TV SYSTEM until your local TV system
appears (KV-J21MF3 only).
3
Press AUTO PROGR.
To start presetting channels automatically
from the specified program position
1 Press MANUAL PROGR.
2 Press TV SYSTEM to select your local TV system
(KV-J21MF3 only).
3 Press PROGR +/
– to select the program position.
4 Press AUTO PROGR.
2
3
1
MANUAL PROGR
COLOR SYSTEM
SELECT
TV SYSTEM
AUTO PROGR
POWER
POWER
TV SYSTEM
B/G
I
D/K
M
AUTO PROGR
1
2
3
1
RM-883
– 6 –
Getting Started
9
-EN
If you are not satisfied with the picture
and sound quality
You may be able to further improve the picture and
sound quality by using fine tuning as below:
1
Select the program position you want to
adjust.
2
Press SELECT until
“MANUAL PROGRAM
”
appears on the screen.
3
Press + or – on the remote commander
once.
4
Press DISP until
“FINE” appears on the
screen.
5
Press + or – continuously until you are
satisfied with the picture and sound
quality.
6
Press SELECT to return to normal screen.
Getting Started
-EN
8
Presetting channels automatically
using the remote commander
1
Press POWER to turn on the TV.
When the TV is turned on in standby mode, press
POWER on the remote commander.
2
Press SELECT until
“TV SYSTEM” appears
(KV-J21MF3 only).
3
Press + or – to select your local TV system
(KV-J21MF3 only).
4
Press SELECT until
“AUTO PROGRAM
”
appears.
5
Press + or – .
6
Press + or – .
Presetting channels manually using the
remote commander
1
Press SELECT until
“TV SYSTEM” appears
(KV-J21MF3 only).
2
Press + or – to select your local TV system
(KV-J21MF3 only).
3
Press PROGR +/
– or a number button until
the required program appears on the
screen.
4
Press SELECT until
“MANUAL PROGRAM
”
appears.
5
Press + or – .
6
Press + or – .
The selected channel appears on the screen.
7
Press SELECT to return to normal screen.
+ or –
SELECT
POWER
1
2
3
1
SELECT
TV SYSTEM : B/G
SELECT
AUTO PROGRAM
B/G I D/K M
VHF LOW B/G
SELECT
TV SYSTEM : B/G
B/G I D/K M
or
1
2
3
4
6
7
8
9
÷
0
5
PROGR
JUMP
1
SELECT
MANUAL PROGRAM
VHF LOW B/G
SELECT
– 7 –
KV -G21L3
RM-883
Operations
10
-EN
POWER
VIDEO
HOLD
TV
1
2
3
4
6
7
8
9
÷
0
5
JUMP
Watching the TV
1
Press POWER to turn on the TV.
When the TV is turned on in standby mode, press
POWER on the remote commander.
2
Select the TV program you want to watch.
To select a program position directly
Press the number button.
To select a two-digit program position, press
“-/--”
before pressing the number buttons.
For example: to select program position 25, press
“-/--,” and then “2” and “5.”
To scan through program positions
Press PROGR +/
– until the program position you
want appears.
3
Press VOL +/– to adjust the volume.
Turning off the TV
To turn off the TV temporarily
Press POWER on the remote commander. The
STANDBY indicator on the TV lights up.
To turn off the TV completely
Press POWER on the TV.
If the power on the TV is turned off in standby mode,
the STANDBY indicator on the TV may remain alight for
a while.
Watching the video input
Press VIDEO/HOLD.
To watch TV
Press TV.
Switching back quickly to the previous
channel
Press JUMP.
Muting the sound
Press MUTING.
÷
2
5
PROGR
Operations
VIDEO
1
POWER
JUMP
MUTING
MUTING
POWER
VOL
Operations
11
-EN
DISP
REVEAL
Setting the Sleep Timer
You can set the TV to automatically turn off as you
have programmed.
Press SLEEP/TEXT CLR.
To cancel the Sleep Timer, press SLEEP/TEXT CLR
repeatedly until
“SLEEP TIMER: OFF
” appears, or turn
off the TV.
Changing the on-screen display
language
You can use buttons on the remote commander or the
TV to change the on-screen display language.
1
Press SELECT until the screen appears as
follows:
2
Press + or – to select “ ”.
Note
• You can also use SELECT and VOLUME +/
– on the TV to
Setting the Wake Up Timer
You can set the TV to automatically turn on as you have
programmed.
1
Press WAKE UP/INDEX repeatedly to set the
timer.
The on-screen display appears and the WAKE UP
indicator on the TV lights up.
2
If you want a particular TV program or
video input to be displayed using the Wake
Up Timer, select the TV program or video
input.
3
Press POWER on the remote commander or
set the Sleep Timer to turn off the TV in
standby mode.
To cancel the Wake Up Timer, press WAKE UP/INDEX
repeatedly until
“WAKE UP TIMER: OFF
” appears, or
turn off the main power of the TV.
Notes
• The Wake Up Timer starts immediately after the on-screen
display disappears.
• The last TV program position or video input just before the TV
turns into standby mode will appear when the TV is turned on
using the Wake Up Timer.
• If no buttons or controls are pressed for more than two hours
after the TV is turned on using the Wake Up Timer, the TV
automatically turns into standby mode. If you want to
continue watching the TV, press any button or control on the
remote commander or the TV.
Displaying on-screen information
Press DISP/REVEAL.
The program position, local system, and TV settings are
displayed on the screen.
: LANGUAGE /
SLEEP TIMER:30M
SLEEP TIMER:60M
SLEEP TIMER:OFF
SLEEP TIMER:90M
No sleep timer
After 90 minutes
After 60 minutes
After 30 minutes
1
AUTO B/G
DYNAMIC ≥ MUSIC
WAKE UP
INDEX
After 10 minutes
No wake up timer
After 12 hours
WAKE UP TIMER:10M
WAKE UP TIMER:OFF
WAKE UP TIMER:12H00M
SLEEP
TEXT CLR
+ or –
SELECT
SELECT
LANGUAGE /
: ENGLISH
KV-G21L3
RM-883
– 8 –
Operations
12
-EN
Using the Child Lock
feature
Watching the picture
in wide mode
You can prevent a child from watching certain program
positions by using the buttons on the remote
commander.
1
Select the TV program you want to lock.
2
Press SELECT until
“CHILD LOCK” appears
on the screen.
3
Press + or – until “LOCKED” appears on the
screen.
Notes
• To unlock the program position, repeat steps 1 to 3 as above
until “LOCKED” disappears from the screen.
• To prevent your child from unlocking the program position,
keep the remote commander away from your child.
÷
0
+ or –
SELECT
SELECT
CHILD LOCK
LOCKED
You can adjust the display mode accordingly to fit the
programs to your TV screen size.
Press WIDE/V-ZOOM repeatedly until the wide
display mode you want appears on the screen.
TV
WIDE/
V-ZOOM
Good-bye,Jane
Good-bye.
Good-bye,Jane
Good-bye.
WIDE
V-ZOOM
NORMAL
Normal display
mode
“WIDE” mode
“V-ZOOM” mode
Operations
13
-EN
Adjusting the
picture
Adjusting the sound and picture settings
1
Press SELECT until the item you want to
adjust appears.
Each time you press SELECT, the screen changes
as follows:
2
Press + or – to adjust the item.
3
To adjust other items, repeat steps 1 and 2.
Notes
• You can also use SELECT and VOLUME +/
– on the TV to
adjust the sound and picture settings.
• The on-screen display for BASS, TREBLE, BALANCE and
SURROUND are available for KV-J21MF3 only.
• SURROUND is only applicable to a stereo signal. When
receiving a monaural signal, please turn off SURROUND for
the best sound
(KV-J21MF3 only)
.
If the picture color is abnormal when receiving
programs through the ˘ (antenna) terminal
Change the “TV SYSTEM”
(KV-J21MF3 only) or
“COLOR
SYSTEM” setting or adjust the
“COLOR” level in the on-screen
display until the color becomes normal.
If the picture color is abnormal when receiving
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.
Note
• Normally set “COLOR SYSTEM
” to “AUTO”.
If the sound is distorted or noisy when receiving
programs through the ˘ (antenna) terminal
(KV-J21MF3 only)
Change the “TV SYSTEM” setting in the on-screen display until
the sound becomes clear.
Adjusting the sound
and picture
÷
0
SOUND
MODE
SELECT
PIC MODE
Selecting the sound mode
p KV-J21MF3 only
Press SOUND MODE until the mode you want
appears.
Each time you press SOUND MODE, the screen
changes as follows:
Note on the SOUND MODE button (KV-G21L3)
• The sound mode feature is unavailable for your TV. Thus, the
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.
Each time you press PIC MODE, the screen changes as
follows:
Note
• If you change the picture and sound mode after the following
adjustments, the adjustment changes in accordance with the
picture and sound mode.
SELECT
+ or –
SOUND
MODE
≥ MUSIC
≥ DRAMA
≥ SPORTS
≥ SOFT
PIC MODE
DYNAMIC
STANDARD
SOFT
High contrast
picture
Soft picture
Normal
picture
Emphasize
low and high
sound effect
Emphasize
huge
audience
atmosphere
Emphasize
vocals and
background
music
Emphasize
soft sound
PICTURE
COLOR
BRIGHT
HUE
SHARPNESS
BASS
BALANCE
SURROUND
TREBLE
(Operative for
NTSC signal only)
(KV-J21MF3 only)
Front of TV
MANUAL PROGR
COLOR SYSTEM
SELECT
TV SYSTEM
AUTO PROGR
– 9 –
KV -G21L3
RM-883
Additional Information
14
-EN
Troubleshooting
Additional Information
If you have any problems, read this manual again and
check the countermeasure for each of the symptoms
listed below.
If the problem persists, contact your nearest authorized
service center or dealer.
Snowy picture
Noisy sound
/ Check the antenna.
/ Check the antenna connection on the TV
and on the wall.
/ Check the TV SYSTEM setting
(KV-J21MF3 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.
Double images or
“ghosts”
/ This may be caused by reflections from
nearby mountains or buildings. A highly
directional antenna may improve the picture.
No color
/ Adjust the COLOR level in the on-screen
display.
/ Check the COLOR SYSTEM setting.
No picture
No sound
/ Press POWER.
/ Check the antenna connection.
/ Check the VCR connections.
/ Check the power cord connection.
/ Check the standby mode.
Good picture
Noisy sound
/ Check the TV SYSTEM setting
(KV-J21MF3 only).
/ Reduce the TREBLE level or select the
“SOFT” sound mode (KV-J21MF3 only).
Good picture
No sound
/ Press VOLUME +.
/ Press MUTING.
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.
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. TEXT.
Note on the TV system
• The TV SYSTEM button is not used on the KV-G21L3 model.
Notes
• When you switch on the TV, you may hear the
“boon” sound
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
POWER on the TV to switch off the TV for five minutes and
then switch it on again.
WARNING
Do not install the appliance in a confined space, such as
a bookcase or built-in cabinet.
– 10 –
KV-G21L3
RM-883
SECTION 2
2
Two screws
(BVTP 4×16)
3
One screw
(BVTP 3×16)
1
Two screws
(BVTP 4×16)
A board
Lever
Lever
A board
DISASSEMBLY
2-1. REAR COVER REMOVAL
– 11 –
2-2. A BOARD REMOVAL
2-3. SERVICE POSITION
KV -G21L3
RM-883
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