Service manual

31
12. Power Supply Unit (P.S.U)
Trouble in P.S.U
Is
power switch
on?
Switch on
No
Yes
Yes
Is
fuse F001
O.K?
Check the power cord outlet
and diode D001, D002,
D003, D004, Q001
No
Is
voltage of C102
100Vdc?
Trouble in D101 or
Video Part
No
Is
voltage of C105
8Vdc?
Trouble in D103
No
Is
voltage of T001
pin 7 130V
(370V)?
Trouble in D001, D002,
D003, D004, C004 and
TH001.
No
Is the
waveform of Q001
Drain pin
correct?
400Vpp (620Vpp)
Trouble in T001, IC001, Q001
and D009 etc.
No
Yes
Yes
Yes
Yes
Is
voltage of C104
45Vdc?
Trouble in D102 or
its ambient circuit
No
A