12. Power Supply Unit (P.S.U)
Trouble in P.S.U
Is
No
power switchSwitch on
on?
Yes
IsCheck the power cord outlet
No
fuse F001and diode D001, D002,
O.K?D003, D004
Yes
Is the
No
Replace R004
voltage of IC001
Replace C005
pin 3 16V?
Yes
Is
voltage of T001NoTrouble in D001, D002,
pin 6 130VD003, D004, C004 and
(370V)?TH001.
Yes
Is the
No
Trouble in T001, IC001,
waveform of IC001
IC101, PH001 and D005 etc.
pin 1correct?
400Vpp (620Vpp)
Yes
Is
No
voltage of C103Trouble in D102, D103 or
45V DC?B+ Part
Yes
Is
No
Trouble in D101 or
voltage of C101
Video Part
80V DC?
Yes
Is
No
Trouble in D108 or
voltage of C113
Video Part
120V DC?
A
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