Troubleshooting; The Power Cannot Be Turned On/The Fuse Blows Out; When The Output Voltage Fluctuates; When Buzz Sound Can Be Heard In The Periphery Of Power Circuit - Philips 40PFL4707/F7 Service Manual

[Power Supply Section]
FLOW CHART NO.1
The power cannot be turned on.
Is the fuse (F600) normal?
Is the P-ON+12V line voltage normal?
FLOW CHART NO.2
The fuse blows out.
FLOW CHART NO.3

When the output voltage fluctuates.

FLOW CHART NO.4

When buzz sound can be heard in the periphery of power circuit.

TROUBLESHOOTING

Yes
Yes
Yes
Yes
No
See FLOW CHART No.2 <The fuse blows out.>
No
Check if there is any leak or short-circuit on the
primary circuit component and repair it if defective.
(C602, D604, D605, D607, D608, D609, D610, Q601,
No
IC602, R611, R612, T601)
No
Check IC401, IC601, D410 and their periphery
circuit. Repair it if defective.
8-1 PL12.3ATR