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5.10 Checking the inverter board circuit
Does 22V output pin
have voltage around 20V?
Does On/Off pin have voltage over 3V?
Does brightness pin have voltage in
the range of 0V~3.2V?
Does I101 pin6 have 5V output?
Check F101, I101, Q110, Q111, Q112,
Q113 and repair them if be damaged
Check I101 and repair them if be damaged
Check panel module if damage
NG
NG
OK
OK
Does P101, P102, P103,
P104 be firmly connected?
Does I101 pin4, pin5
have triangle pulse?
Does I101 pin1 have soft
start edge up to 2.4V?
Does I101 pin8 have
voltage up to 1.2V from output
detection?
Does
half bridge (Q104,
Q105, Q106, Q107, Q108)
work successful?
OK
OK
OK
NG
Check Q104, Q105, Q106, Q107, Q108 and
repair them if damage
Check D102, D103, D107, D108, D114,
D115, D112, D113 and repair if damage.
Repair 101
Check I101 and repair if damage
Check CCFL and repair if damage.NG
NG
NG
OK
NG
Does transformer
(T101, T102) have output AC
voltage to P101, P102, P103,
P104?
OK
Check T101 and T102 if damage
OK
NG
29
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5. Troubleshooting (continued)
ACER G24