12. Power Supply Unit (P.S.U)
Trouble in P.S.U
Is
No
power switchSwitch on
on?
Yes
Is
NoCheck the power cord outlet
fuse F001
and IC001, D004, BD001
O.K?
Yes
Is the
voltage of IC001No
Replace DZ001, Q001,
pin 4 Q002 and D003
more than
14.5V?
Yes
Is
voltage of T001NoTrouble in TH001, C014,
pin 6 130VBD001, D003, D004,
(370V)?D008
Yes
Is the
No
waveform of IC001
Trouble in D003, D004 etc
pin 3 correct?
400Vpp (620Vpp)
Yes
Is
No
voltage of C120Trouble in D115, D112,
80Vdc?DZ114,Q104, Q107, Q105,
Video Part
Yes
Is
No
voltage of C101
210Vdc?
Yes
Is
No
voltage of C117
5Vdc?
A
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