Acer wistron rb23wabas Manual De Usuario
Check +3.3V supply on I301 pin2.
OK
NG
Proceed " Checking the DC/DC converter circuit" section.
Check +1.2V supply on I305 pin 2.
OK
NG
Proceed " Checking the DC/DC converter circuit" section.
Check X301 12MHz clock input to I312 pin 116 and 117 at TTL level.
OK
NG
Failure Point
1) Printed wire broke between X301 and I312 pin 116, 117.
2) C354, C356 is short or open.
3) X301 failure.
2) C354, C356 is short or open.
3) X301 failure.
Check I312 pin 114 RSTB signal is high level at normal operation.
OK
Check I312 pin 70,71,72 SPI signal.
OK
NG
Failure Point
1) Printed wire broke between I312 pin 70, 71, 72 and I313 pin 2, 5,6.
2) I313 is failure.
2) I313 is failure.
Failure Point
I312 failure.
Failure Point
1) Printer wire broke between I312 pin 114 and
C359
2) C359 is short.
3) I312 is failure.
1) Printer wire broke between I312 pin 114 and
C359
2) C359 is short.
3) I312 is failure.
NG
5.10 Checking the resolution change IC movement
49
5. Troubleshooting (continued)
ACER V233H