Trouble Shooting
Page 9
H15AAX (AL502)
7. Checking the interface circuit of sync signal
7.1 Checking the control circuit of horizontal sync pulse
Check the horizontal sync signal on I301
pin 94 TTL level.
OK
NG
Failure point
1) Video cable may have failed.
2) Printed wire broke between P302 pin 13
and I301 pin 94
3) R346, R348 open
4) C372, C373 short
Process "Checking the resolution change IC
movement" section.
Check the vertical sync signal on I300 pin
44 TTL level.
OK
NG
Failure point
1) Video cable may have failed.
2) Printed wire broke between P302 pin 7 and I300 pin 44
3) FB308, R343 open
4) C369 short
Process "Checking the resolution change IC
movement" section.
7.2 Checking the control circuit of vertical sync pulse
Summary of Contents for H15AAX
Page 1: ...15 inch LCD Monitor H15AAX Service Manual ...
Page 3: ...Circuit Description H15AAX AL502 ...
Page 30: ......
Page 71: ...Printedin Taiwan ...