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Check the 3.3 V power are supplied on I312 pin 2.
Is a dot clock being outputted under the
condition that a LCD module is connected to
P301 pin 39?
Check the H-sync pulse of negative polarity is
output on P301 pin 35 at TTL level.
Check the V-sync of negative polarity are
output on P301 pin 36.
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Trouble Shooting
Check if the voltage on I312 pin3 that
N G
is high level DC at 5V.
O K
O K
Failure point
I312 Failure
N G
O K
N G
O K
N G
O K
N G
1) Printed wire broke between I312 and FB314
2) Power Board failure.
1) I305 failure
2) Printed wire broke between I305 and P301 pin 39.
1) I305 failure
2) Printed wire broke between I305 and P301 pin 35.
1) I305 failure
2) Printed wire broke between I305 and P301 pin 36.
NEC-FA150ATUA
Failure point
Failure point
Failure point
Failure point
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