Sony FPF55C17196UA Service Manual page 32

(3)
Turn on AC power.
PSU board
Va (63V) exist?
N
Turn off the AC power.
Disconnect
CNU4-5(ABUSU4).
Turn on AC power.
PSU board
Va (63V) exist?
N
Turn off the AC power.
Disconnect
CND4-5(ABUSD4).
Turn on AC power.
PSU board
Va (63V) exist?
N
Y
PSU board
Vs (85V) exist?
N
Turn off the AC power.
(4)
Y
ADM is defective.
ADM chip has abnormality.
Y
ABUSU1-4 boards
are defective.
Power supply line has abnormality.
(Ex. capacitor)
Y
ABUSD1-4 boards
are defective.
Power supply line has abnormality.
(Ex. capacitor)
PSU board is
defective (Vs).
-28-
Turn off the AC power.
End of analysis
Turn off the AC power.
End of analysis