5.8 Abnormalplug and play operation (For the DVI)
Confirmthe host computersupplies DDC2 mode.
OK
NG
FailurePoint
Thehost machine is not communicatiog in DDC2 mode.
Checkthe voltage on Q307 pin1 that is power DC 3.3
V.
OK
NG
FailurePoint
1)Printed wire broke between VR307 pin3,D325 and
P303pin14
2)R361,R372,R363 is short or open.
3)D325,Q307,I304 is failure.
Checkthe output signal of serial data / clock on I305
pin2.3
OK
NG FailurePoint
I305is failure.
Checkthe voltage on P303 pin14 that is power DC 5 V.
OK
NG FailurePoint
TheVideo cable is failure.
Checkthe voltage on P303 pin6, 7 that is serial data /
clocksignal.
OK
NG FailurePoint
TheVideo cable is failure.
FailurePoint
1)Printed wire broke between I305 pin2,3,R344,R345
andP303 pin6,7.
2)I305 maybe failure.
3)R422,R423 is open or short.
4)R344,R345 is open or C337,C336 and D321,D320 is
short
Checkthe voltage on P303 pin16 that is 4.5V.
OK
NG
FailurePoint
1)Printed wire broke between P303 pin 14 and pin 16.
2)R340 is open.
3)C323 or C324 is short.
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5.Troubleshooting (continued)
ACERX193HQ