OK
OK
All OK
No or
Low voltage
No Power/No Operation
< symptom >
No signal = IC8001
No P16.3V = Q7502/D7502
NG
Troubleshoot of Power On Problem (1/2)
Check output voltage of
STB5V, STB3.3V
Check TV_SUB_ON signal (=High)
and voltage P16.3V line
Power IC of Defective line
Check short circuit of each power line
SUB5V,SUB3.3V,DDR1.8V,VCCK1.1V
(PNL12V,TNR3.3V,TNR1.8V)
F7101/CF7101
Q7301/IC7301/D7317,
D7502/IC7503
IC7503/IC8708
(check short circuit of STB power line)
OK
NG
Check input voltage of
IC7503 (16V) and
Check VLED voltage (38V)
at P2-3pin
If all output voltages are OK,
IC8001
NG
Check by power on sequence ( from to )
1st
13th
3rd
4th
2nd
6th
7th
8th
9th
6
