Service manual

30
12. Power Supply Unit (P.S.U)
Is the
TH001 OK?
Is TR Q003
OK?
1. Replace Q003.
2. Replace TH001.
No
Is
voltage of T001
pin 1 130V
(370V)?
Trouble in bridge diode
D001 or peripheral
device.
No
Is the
waveform of T001
pin 7 correct?
Trouble in T001, IC001 and
check cold soldering of IC001.
No
Trouble in P.S.U
Is
power switch
on?
Switch on
No
Yes
Yes
Yes
Yes
Yes
Yes
Is
voltage of C103
226Vdc?
Trouble in D102, D103.
No
Is
fuse F001
O.K?
Check the power cord outlet
and diode bridge D001.
No
Is
voltage of C106
80Vdc?
No
Yes
Trouble in D104.
A
Yes
Is
voltage of C105
185Vdc?
Trouble in D114, D115.
No