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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?
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
half bridge (Q104,
Q105, Q106, Q107, Q108)
work successful?
Does transformer
(T101, T102) have output AC
voltage to P101, P102, P103,
Check panel module if damage
5. Troubleshooting (continued)
OK
OK
OK
OK
OK
detection?
NG
Does
OK
P104?
OK
Check F101, I101, Q110, Q111, Q112,
NG
Q113 and repair them if be damaged
NG
Check I101 and repair them if be damaged
NG
Check CCFL and repair if damage.
NG
Check I101 and repair if damage
Repair 101
NG
Check D102, D103, D107, D108, D114,
OK
D115, D112, D113 and repair if damage.
Check Q104, Q105, Q106, Q107, Q108 and
NG
repair them if damage
NG
Check T101 and T102 if damage
29
ACER P243W
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