Panasonic 32A410G Podręcznik techniczny - Strona 6

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Troubleshoot of Power On Problem (1/2)

Check by power on sequence ( from

< symptom >

No Power/No Operation

1st

Check output voltage of

STB5V, STB3.3V

3rd

4th

Check TV_SUB_ON signal (=High)

and voltage P16.3V line

6th

7th

Check short circuit of each power line

SUB5V,SUB3.3V,DDR1.8V,VCCK1.1V

(PNL12V,TNR3.3V,TNR1.8V)

8th

9th

All OK

If all output voltages are OK,

IC8001

)

13th

Check input voltage of

IC7503 (16V) and

Check VLED voltage (38V)

No or

at P2-3pin

Low voltage

2nd

IC7503/IC8708

(check short circuit of STB power line)

No signal = IC8001

No P16.3V = Q7502/D7502

Power IC of Defective line

F7101/CF7101

Q7301/IC7301/D7317,

D7502/IC7503