Sony KE-42TS2E / KE-42TS2U Service Manual ▷ View online
38
Turn off the main power.
Bar of 1/2 width on the
left does not light?
Y
Turn off the main power.
Disconnect CN52 from ABUSL board.
Turn on the main power.
PSU cable is defective.
Connector has poor
connection
(LOGIC board is
defective.)
ABUSL board is defective.
Voltage exists at ABUSL
board CN 52.
board CN 52.
LOGIC board is
defective.
N
Y
Bar of 1/2 width in
right does not light?
Y
Turn off the main power.
Disconnect CN42 from ABUSL board.
Turn on the main power.
Voltage exists at
PSU Side?
PSU cable is defective. Connector
has poor connection.
(PSU board is defective.)
ABUSR board is
defective.
LOGIC board is
defective.
N
Y
N
End of analysis
N
Y
N
Y
N
1
Voltage exists at
PSU Side?
Voltage exists at
ABUSR board CN42?
ABUSR board CN42?
2
39
Exists in left 1/2
area.
Y
N
Turn off the main power.
Replace ABUSL board (Backup part).
Turn on the main power.
Normal?
ABUSL board is
defective.
N
Y
Y
Turn off the main power.
Replace LOGIC board (Backup part)
Turn on the main power.
Normal?
LOGIC board is
defective.
Y
N
Turn off the main power.
Replace LOGIC ~ ABUSL signal cable.
Turn on the main power.
Normal?
Y
Signal cable is
defective.
ADM is defective.
(Panel chassis is
defective.)
N
N
Turn off the main power.
End of analysis
2
Vertical line of
different color?
3
4
40
Y
Turn off the main power.
Replace ABUSR board (Backup part).
Turn on the main power.
Normal?
ABUSR board is
defective.
N
Turn off the main power.
Replace LOGIC board (Backup part).
Turn on the main power.
Normal?
LOGIC board is
defective.
Y
Turn off the main power.
Replace signal cables LOGIC ~ ABUSR.
Turn on the main power.
N
3
4
Panel is defective.
(Panel chassis is
defective.)
Turn off the main power.
End of analysis
Normal?
Y
Signal cable is
defective.
ADM is defective.
(Panel chassis is
defective.)
N
41
4.6.3 "Horizontal bar" Problem analysis procedure
Horizontal bar
Normal?
X-SUS board is
defective.
Y
Y
N
Turn off the main power.
Replace X-SUS board (Backup parts).
Turn on the main power.
Turn off the main power.
Replace X-SUS0 board (Defective product).
Replace Y-SUS board (Backup parts)
Turn on the main power.
N
Normal?
Y-SUS board is
defective.
Panel chassis is
defective.
Y
N
Turn off the main power.
End of analysis
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