Sony KE-37XS910 / KE-42XS910 / KE-MX37A1 / KE-MX37N1 / KE-MX37S1 Service Manual ▷ View online
– 41 –
6
Disconnect connection from
XBB/X-SUS board.
Measure resistance of XBB line.
(Between A1-B1,B1-A2,
A2-B2 ,B2-A3,A3-B3,B3-A4,A4-B4)
XBB line has
short-circuit.
XBB is faulty
(Panel chassis is
defective.)
X-SUS board
is defective.
Y
Y-SUS board
is defective.
X-SUS board
is defective.
End of analysis
A1
B1
A2
B2
A3
B3
A4
B4
N
– 42 –
4.6.2
"Vertical line/Vertical bar" Problem analysis procedure
One vertical line？
Turn on the main power.
Any
changes?
ADM flexible has abnormal
appearance?
ADM is defective.
(Panel chassis is
defective.)
Signal cable is
defective.
Y
Heat-melted
junction is defective
(Panel chassis is
defective.)
Y
N
N
Panel address has open
circuit or ADM IC chip is
defective.
(Panel chassis is defective.)
End of analysis
End of analysis
Turn off the
main power.
Y
Y
N
N
Vertical line/Vertical bar
Tap lightly on ADM flexible
heat-melted junction.
LOGIC ~ ABUS board signal
cable has abnormal appearance?
1
– 43 –
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.
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?
2
– 44 –
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
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