LiteOn B17AAU, Руководство по обслуживанию

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Page 6 Trouble Shooting
B17AAU / B17ANU / B17AAY
O K
N G
Failure point
1) No R, G and B video signal output from host computer. Check
computer
2) Video signal cable disconnection.
O K
N G
Check the R, G, B video signal from computer input on
D-Sub R, G, B connector.
Check the R, G, B input signals on I315 pin E1, D2, C1
respectively that their level is 0.7Vp-p maximum.
Is the pulse of the TTL level being output to I319, I320
from the data line of I315?
Failure point
In the case of the Red signal. (A Green and Blue signal is the same
path, too.)
1) Printed wire broke between D-Sub(R) and I315 pin E1.
2) R339 short.
3) C359 open.
4) R337 open.
O K
N G
Failure point
1) Printed wire broke between I315 data line and I319, I320.
2) I315 failure.
Check the negative horizontal sync pulse output to
RN314 pin 8 from I315 pin F20 at TTL level.
O K
N G
Failure point
1) Printed wire broke between I315 pin F20 and RN314 pin 8.
2) I315 failure
Check the negative vertical sync pulse output to RN314
pin 7 from I315 pin F19 at TTL level.
O K
N G
Check the positive DE pulse output to RN314 pin 6 from
I315 pin F18 at TTL level.
O K
N G
Check the SHFCLK OUTPUT to L322 pin 2 from I315 pin
G20 at TTL level.
O K
N G
Next Page
Failure point
1) Printed wire broke between I315 pin G20 and L322 pin 2.
2) L321 open
3) C583 short
4) C590 short
5) L322 short
6) I315 failure
Failure point
1) Printed wire broke between I315 pin 73 and RN314 pin 7.
2) I315 failure
Failure point
1) Printed wire broke between I315 pin F18 and RN314 pin 6.
2) I315 failure
4. Abnormal screen