Trouble Shooting
Page 3
NEC-FA150ATUA
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Check if the voltage on I312 pin3 that
is high level DC at 5V.
Check the 3.3 V power are supplied on I312 pin 2.
O K
N G
O K
N G
Failure point
1) Printed wire broke between I312 and FB314
2) Power Board failure.
Failure point
I312 Failure
Is a dot clock being outputted under the
condition that a LCD module is connected to
P301 pin 39?
O K
N G
Failure point
1) I305 failure
2) Printed wire broke between I305 and P301 pin 39.
Check the H-sync pulse of negative polarity is
output on P301 pin 35 at TTL level.
O K
N G
Failure point
1) I305 failure
2) Printed wire broke between I305 and P301 pin 35.
Check the V-sync of negative polarity are
output on P301 pin 36.
O K
N G
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Failure point
1) I305 failure
2) Printed wire broke between I305 and P301 pin 36.