Service manual

22” LCD Color Monitor Adelpia TGL2240A
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8.2 Trouble Shooting
8.2.1 Main Board
No power
No power
Press power key and look if the
picture is normal
Please reinsert and make sure the
AC of 100-240 is normal
Reinsert or check the
power sect
Check if X401 oscillate
w
veforms are normal
Measure U701 Pin2=3.3V,
C704(+)=1.8V
OK
OK
NG
NG
NG
Measure CN701
Replace U401
Re
p
lace X401
NG
Replace U701，Q702
OK
OK