Acer AL1702 Manuale di servizio - Pagina 18
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4. Abnormal screen
Check the R, G, B video signal from computer
input on P302 of video connector.
Check the R, G, B input video signals on I305
pin63, 60, 58 respectively that their level is 0.5
Check all LVDS signals being output to P305
Prpcess "Checking the resolution change IC
movement" section.
Page 16
NG
OK
to 0.7Vp-p.
NG
OK
from I305?
NG
OK
Failure Point
1) No R, G, B video signals output from host
computer, check computer.
2) Video signal cable disconnection.
Failure Point
In the case of the Red signal. (A Green and
Blue signal is the same path, too.)
1)Printed wire broke between P302 pin 9 and
I305 pin63.
2) Video cable is failure.
3) R322 is short or open.
4) R318 is short or open.
5) C332 is short or open.
Failure Point
Printed wire broke between I305 and P305.
AL1702