5.Troubleshooting (continued)
5.4 Abnormalscreen for VGA
Checkthe R, G, B video signal from computer
inputon P302 of video connector.
OK
NG FailurePoint
1)No R, G, B video signals output from host
computer,check computer.
2)Video signal cable disconnection.
Checkthe R, G, B input video signals on I305
pin12,14, 16 respectively that their level is 0.0 to
0.7Vp-p.
FailurePoint
Inthe case of the Red signal. (A Green and Blue
signalis the same path, too.)
1)Printed wire broke between P302 pin1 and
I305pin16.
2)Video cable is failure.
3)FB302,FB306,R327 is open.
4)R326 is short or open.
5)C315 is short or open.
NG
OK
Checkall LVDS signals being output to P305
fromI305?
FailurePoint
Printedwire broke between I305 and P305.
NG
OK
Prpcess"Checking the resolution change IC
movement"section.
23
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ACERX193HQ