Sony KLV-20S400A Service Manual ▷ View online
– 4 –
KLV-20S400A
RM-GA011/W
1-5. Lead Free Information
The circuit boards used in these models have been processed
using Lead Free Solder. The boards are identified by the LF
logo located close to the board designation.
The circuit boards used in these models have been processed
using Lead Free Solder. The boards are identified by the LF
logo located close to the board designation.
The servicing of these boards requires special precautions. It
is strongly recommended to use Lead Free Solder material in
order to guarantee optimal quality of new solder joints. Lead
Free Solder is available under the following part numbers:-
is strongly recommended to use Lead Free Solder material in
order to guarantee optimal quality of new solder joints. Lead
Free Solder is available under the following part numbers:-
Due to high melting point of Lead Free Solder, the soldering
iron tip temperature needs to be set to 370 degrees
centigrade. This requires soldering equipment capable of
accurate temperature control coupled with a good heat
recovery characteristics.
iron tip temperature needs to be set to 370 degrees
centigrade. This requires soldering equipment capable of
accurate temperature control coupled with a good heat
recovery characteristics.
For more information on the use of Lead Free Solder,
please refer to
please refer to
http://www.sony-training.com
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Figure 2: LF logo
Figure 3: LF logo on circuit board
– 5 –
KLV-20S400A
RM-GA011/W
PICTURE OFF/
TIMER
REMOTE/LIGHT SENSOR
STANDBY
POWER
MENU TV/VIDEO
VOLUME
CHANNEL
POWER
SECTION 2
SELF DIAGNOSTIC FUNCTION
2-4. LED Pattern
When safety shutdown occurs, Standby LED display reports the
cause by using the blinking patterns as indicated below.
When safety shutdown occurs, Standby LED display reports the
cause by using the blinking patterns as indicated below.
Example:
The figure above shows LED display when
SHUTDOWN is caused by DC_ALERT 2. It repeats
flashing for a specified number of times in 0.3sec/
cycle and has a 2 seconds interval of lighting off.
Please note that a 2 seconds interval of lighting off
is fixed regardless of abnormal state types.
SHUTDOWN is caused by DC_ALERT 2. It repeats
flashing for a specified number of times in 0.3sec/
cycle and has a 2 seconds interval of lighting off.
Please note that a 2 seconds interval of lighting off
is fixed regardless of abnormal state types.
2.0 sec
2.0 sec
0.3 sec
0.3 sec
2-1. Overview of Control Buttons
LED Type Description
Remark
Status
Display
Power LED
Remark
POWER
Green: One LED Green lights at power ON.
STANDBY
Red: One LED
Red lights during standby.
Timer
Green/Amber
: Two LEDs
: Two LEDs
Green lights during Picture
OFF and amber lights
during Timer activation.
OFF and amber lights
during Timer activation.
POWER ON Green lights
OFF
in a normal state.
STANDBY
OFF
Red lights
Microcomputer is
in a sleep state.
Failure
Classify the
trouble causes by
the no. of red
blinking.
trouble causes by
the no. of red
blinking.
Standby LED
Microcomputer is
2-2. LED Display Specification
2-3. LED Display Control
– 6 –
KLV-20S400A
RM-GA011/W
Blinking times
Error
Countermeasure
2
DC_DET (12V Main Voltage)
Replace either/both
z
BG1 board
z
GP(26",32")/
Power Unit(G2D)(37") board
Power Unit GD(20”) board
Power Unit(G2D)(37") board
Power Unit GD(20”) board
3
DC_ALERT 1
Replace BG1 board.
4
DC_ALERT 2
Replace BG1 board.
5
DC_ALERT 3
Replace BG1 board.
6
BACKLIGHT/
Replace BG1 board.
INVERTER ERROR
7
INTERNAL TEMP
Replace GP(26",32")/Power Unit(G2D)(37") board
ERROR
Power Unit GD(20”) board
BG1 board
BG1 board
8
AUDIO ERROR
Replace either/both
z
BG1 board
z
GP(26",32")/
Power Unit(G2D)(37") board
Power Unit(G2D)(37") board
z
Speaker
9
Not used for GA
—
10
Not used for GA
—
11
NVM ERROR
Replace either/both
z
BG1 board
12
IIC ERROR
Replace BG1 board.
13
BALANCER ERROR
Replace BG1 board.
14
HDMI ERROR
—
2-5. Standby LED Error Display
Perform below countermeasures according to Standby LED blinking times.
Perform below countermeasures according to Standby LED blinking times.
Note: Each of the above blinking repeats every 2 seconds.
– 7 –
KLV-20S400A
RM-GA011/W
SECTION 3
DISASSEMBLY
3-2. H1S Board Removal
3-1. Rear Cover and Stand Assy Removal
3-3. GD Board and Bracket Removal
3-4. Inverter Board Removal
3-6. Vesa Frame Removal
qa
Lift to remove
Rear Cover
2
Four screws
(BVTP2 3 X 12)
5
Two screws
(BVTP2 3 X 12)
6
AC Cover
1
Eight screws
(BVTP2 4 X 20)
3
Two screws
(+PSW M3 X 5)
4
Two screws
(+BVTP 3 X 12)
9
Four screws
(+PSW M4 X 12)
0
Handle Assy
7
Two screws
(+PSW M4 X 12)
8
Stand (20AG) Assy
3
Button (B)
Bracket
4
H1S board
2
Lift tabs to
remove board
4
Two screws
(BVTP2 4 X 16)
(BVTP2 4 X 16)
4
GD Compl
Kit (STT)
Kit (STT)
5
GD (20) Bracket
3
One connector
2
One connector
1
Four screws
(+PSW 3SG)
6
Three
Connectors
3
Three screws
(+BVST 3 X 8)
1
Six screws
(+BVST 3 X 8)
(+BVST 3 X 8)
5
Three
Connectors
Connectors
2
Shield
Inverter
Inverter
7
board
4
One
connector
6
BG1 board
2
Side Jack (20)
Bracket Assy
4
Two Connectors
5
Two Connectors
3
Nine screws
(+BVST 3 X 8)
1
One screw
(+PSW M3 X 5)
2
Frame
5
LCD Bracket
(20-EG1L) Assy
1
One screw
(+PSW M4 X 8)
3
Four screws
(+PSW M4 X 8)
4
Two screws
(BVTP2 4 X 16)
3-5. Side Jack Bracket Assy and BG1
Board Removal
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