Hitachi P50H401/DW3-U Service Manual page 131

TROUBLESHOOTING THE 50AE1 PANEL
On ABUSL board
CNL2 (14)-(19) pin or
CNL2 (14)-(15) pin
are shorted.
ABUSR board
CNR3 (6)-(5) pins or
CNR3 (6)-(1) pins
are shorted.
ABUSC board
CNC3 (6)-(5) pins or
CNRC (6)-(1) pins
are shorted.
(2)
Y
Remove ADM from the following
four connectors.
N
CNL 3, CNL 4,CNL 5, CNL 6
CN52 (14)-(19) pin
CN52 (14)-(15) pin
Y
Remove ADM from the following (4)
N
CN R4, CNR5, CNR 6, CNR 7
CNR3 (6)-(5) pins or
CNR3 (6)-(1) pins
Y
Remove ADM from the following two connectors.
N
CNR3 (6)-(5) pins or
CNR3 (6)-(1) pins
(3)
ABUSL board
N
or
Y
ADM (Connector with COF attached)
connectors.
ABUSR board
N
are shorted.
Y
ADM (Connector with COF attached)
CNC3, CNC4
ABUSR board
N
are shorted.
Y
129
ADM (Connector with COF attached)
COF (Chip on Film)
COF COF
Connector to ABUS PWB
ADM (Connector with COF attached)
ADM is defective
(Panel chassis is defective.)
ADM chip is defective
ABUSL board is defective.
Power supply circuit
has short-circuit.
ADM is defective
(Panel chassis is defective.)
ADM chip is defective
ABUSR board
is defective.
ADM is defective
(Panel chassis is defective.)
ADM chip is defective
ABUSC board is defective.
Power supply circuit
has short-circuit.
End of analysis