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11. Power Supply Unit (P.S.U)
Trouble in P.S.U
Is the
power switch
on?
Yes
Is
fuse F001
O.K?
Yes
Is the
IC001
O.K?
Yes
Is
voltage of T001
pin 8 130V
(270V)?
Yes
Is the
waveform T001
pin 5 correct?
Yes
Is the
voltage of C102
set at 165Vdc?
Yes
Is voltage
of C104 set at
65Vdc?
A
No
Switch on
No
Check the power cord outlet
and diode D001,D002,D003,D004
No
Replace IC002
Trouble in bridge diode
No
D001 or peripheral
device
Trouble in switching
No
power transformer T001
or IC001 and its ambient
circuit
No
Trouble in T001
or D101
No
Trouble in T001 or D102
27
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