Inverter Circuit On Power Board - Acer AL1716 Service Manual

4.2 Inverter circuit on power board

Check C106 pin is
greater than 0.55V Brightness pin is
an external PWM.
NG
Check pin2 of I101 is 5V
OK
Check if
P103 and P104 are connected
correctly.
OK
Check pin5 of I101, there's around
1.25V from output detection.
OK
Check SW MCS Q105 whether to
work properly.
OK
Check the prepherial components and repair
them
4. Troubleshooting (continued)
OK It is not inverter board problem.
Check R105, ZD101, or C102 whether to
NG be damaged. And, printed wire between
them is opened.
Check CCFL and repair them. Reconnect
NG
P103 and P104 in tightly.
Check D121, D120, R130, C128, C111
NG
and repair them if be damaged.
NG Repair Q105
ACER AL1716W 15
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