Acer wistron rb23wabas Manual De Usuario
Check the horizontal sync signal on P302 pin13 TTL
level.
OK
NG
Failure Point
Video cable is failure.
Check the horizontal sync signal on I307 pin41 TTL
level.
OK
NG
Failure Point
1) Printed wire broke between P302 pin13 and
I307 pin41.
2) R321 is open.
3) D307 ,R324 or C327 is short.
3) D307 ,R324 or C327 is short.
Failure Point
Proceed "Checking the resolution change IC movement"
section.
section.
5.7.2 Checking the control circuit of vertical sync pulse
Check the vertical sync signal on P302 pin14 TTL level.
OK
NG
Failure Point
Video cable is failure.
Check the horizontal sync signal on I307 pin42 TTL
level.
OK
NG
Failure Point
1) Printed wire broke between P302 pin14 and
I307 pin42.
2) R322 is open.
3) D306,R323 or C326 is short.
3) D306,R323 or C326 is short.
Failure Point
Proceed "Checking the resolution change IC movement"
section.
section.
5.9 Checking the interface circuit of sync signa
5.9.1 Checking the control circuit of horizontal sync pulse
36
5. Troubleshooting (continued)
ACER V233H