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R15AAC/AAU (vs15)
8.
Abnormal plug and play operation
8.1
Abnormal plug and play operation for VGA
Confirm the host computersupplies DDC2 mode.
OK
NG
Failure Point
The host machine is not communicatiog in DDC2
mode.
Check the voltage on I306 pin8 that is power DC 5 V.
OK
NG
Failure Point
1) Printed wire broke between I306 pin8, D306, D309
and P302 pin9.
2) D306 is failure.
3) D310 is short.
Check the output signal of serial data / clock on I308
pin5, 6.
OK
NG
Failure Point
I308 is failure.
Check the voltage on P302 pin9 that is power
DC 5 V.
OK
NG
Failure Point
The VGA video cable is failure.
Check the voltage on P302 pin12, 15 that is serial data
/ clock signal.
OK
NG
Failure Point
The VGA video cable is failure.
Failure Point
1) Printed wire broke between I309 pin5, 6 and P302
pin12, 15.
2) R332, R333 is open.
3) C338, C339 is short.
