Acer RA19WAANU Service Manual page 25

ACER X193HQ
24
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5.5 Abnormal screen (For the DVI)
5. Troubleshooting (continued)
Check the DVI video signal from computer input
on P303 of DVI-I video connector.
NG
OK
Check the DVI input video signals on I305 pin
2,3,4,5,6,7,47,48 respectively that differential
input voltage is 150 to 1200mV, and input
commond mode voltage is 3.3V.
NG
OK
Check all LVDS signals being output to P305
from I305?
NG
OK
Prpcess "Checking the resolution change IC
movement" section.
Failure Point
1) No DVI video signals output from host
computer, check computer.
2) DVI Video signal cable disconnection.
Failure Point
In the case of the DVI_RX0+/- signal. (A
DVI_RX1+/-, DVI_RX2+/- and DVI_RXC+/-
signal is the same path, too.)
1)Printed wire broke between P303 pin 17, 18 and
I305 pin 4. 15.
2) Video cable is failure.
3) R334, R335 open.
Failure Point
Printed wire broke between I305 and P305.