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5.8 Abnormal plug and play operation (For the DVI)
Confirm the host computersupplies DDC2 mode.
OK
NG
Failure Point
The host machine is not communicatiog in DDC2 mode.
Check the voltage onQ307 pin1 that is power DC 3.3
V.
OK
NG
Failure Point
1) Printed wire brokebetween VR307 pin3,D325 and
P303 pin14
2) R361,R372,R363 is short or open.
3) D325,Q307,I304 is failure.
Check the output signal of serial data / clock on I305
pin 2.3
OK
NG
Failure Point
I305 is failure.
Check the voltage on P303 pin14 that is power DC 5 V.
OK
NG
Failure Point
The Video cable is failure.
Check the voltage on P303 pin6, 7 that is serial data /
clock signal.
OK
NG
Failure Point
The Video cable is failure.
Failure Point
1) Printed wire brokebetween I305 pin2,3,R344,R345
and P303 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
Check the voltage onP303 pin 16 that is4.5V.
OK
NG
Failure Point
1) Printed wire broke betweenP303 pin 14 and pin 16.
2) R340 is open.
3) C323 or C324 isshort.
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5. Troubleshooting (continued)
ACER X193HQ