Read Sony KLV-32D300A / KLV-40D300A / KLV-46D300A (serv.man2) Service Manual online
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KLV-32/40/46D300A
RM-GA008
G1H Board PFC Converter Trouble Shooting
(KLV-32D300A)
Check Q6107, 6108
PH6103, R6181
T6102 Disconnection of
1pin-3pin winding
IC6101, 6103 OVP
circuit operation R6130,
6131, 6132, 6133,
6134, 6135, 6136, OPEN
Or IC6101 fail
PFC Converter fail
IC6101 8 pin (Vcc)
About 17V?
Voltage of C6152
about 18V?
Voltage of C6125
about 395V?
IC6101 7 pin (Out)
Is the output a
Pulse wave?
IC6101 fail
L6102 disconnection of
5pin-12pin winding
No
No
No
Yes
Yes
Yes
Check
Q6102, R6121
PFC Output voltage
confirmation
confirmation
It jumps up to DC450V or more transitional
The voltages do not go up by
DC140V. (Confirm it with AC100V)
DC140V. (Confirm it with AC100V)
PFC control IC
Vcc voltage
confirmation
Vcc voltage
confirmation
PFC control IC
Switching
confirmation
Switching
confirmation
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