Checking Inverter Board Circuit - Acer H15AAX Service Manual

13. Ch ec k ing inv er t er board c irc uit
Brightness pin is between 0V and 3.7V.
Check pin 5 of I102 is 5V.
Check CN102, CN103 is connected
Check pin 3 of I102 is over 2V.
Check pin 18 of I102 is triangle
Check pin 4 of I102 there is soft start
edge up to 4V and pin 11, 12, 19, 20
there is some pulse output.
Check pin 2 of I102 there is up to 2V
Check full-bridge (I101, I103, D102,
D103, C123, C125) work right.
Check transformer (T101, T102)
Check detection (C124, C118, C126,
CR102 and like those) work right
Page 16
Check Vin pin is around 15.5V.
On/off pin is over 2V.
NG
OK
NG
OK
right.
NG
OK
NG
OK
pulse.
NG
OK
NG
OK
from output detection.
OK
NG
NG
OK
work right.
NG
OK
and repair them.
It is not inverter problem.
Check Q101, D101, D104 and repair
them.
Check CCFL and repair them.
Check Q106, D110 and repair them.
Check C115, R108, I102 and repair
them.
Repair I102.
Check Q102, Q103, CR101, CR103
and repair them.
Repair them.
Repair them.
H1 5 A AX ( AL 5 0 2 )
T ro ubl e Sho o t i ng