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9. Checking the resolution change IC movement
Is there +3.3V supply on I302, I303,
I305, I306, I308
N G
Proceed "Checking the DC/DC converter circuit" section.
O K
Is 10MHz clock input to I306 pin 13
at TTL level?
Is 10MHz clock output from X302
N G
at TTL level?
O K
N G
O K
1) Printed wire broke between X302 and I306 pin 11, pin 13
2) I306 failure
Is +16.934MHz clock input to I305
pin 20 at TTL level?
Is +16.934MHz clock output from
N G
X301 at TTL level?
N G
O K
O K
Failure point
Print wire broke between X301 and
I305 pin 20, pin 21.
Failure point
I305 failure
Failure point
X302
Failure point
Failure point
X301
NEC-FA150ATUA
Trouble Shooting
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