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12. Power Supply Unit (P.S.U)
Is the
voltage of IC001
pin 3 16V?
Replace R004
Replace C005
No
Is
voltage of C101
80V DC?
Trouble in D101 or
Video Part
No
Is
voltage of C113
120V DC?
Trouble in D108 or
Video Part
No
Is
voltage of T001
pin 6 130V
(370V)?
Trouble in D001, D002,
D003, D004, C004 and
TH001.
No
Is the
waveform of IC001
pin 1correct?
400Vpp (620Vpp)
Trouble in T001, IC001,
IC101, PH001 and D005 etc.
No
Trouble in P.S.U
Is
power switch
on?
Switch on
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Is
voltage of C103
45V DC?
Trouble in D102, D103 or
B+ Part
No
Is
fuse F001
O.K?
Check the power cord outlet
and diode D001, D002,
D003, D004
No
A