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Trouble Shooting
NEC-FA150ATUA
14.5 Check the power supply
Is the 5V input to J201 pin 1, 2
O K
N G
Failure point
1) USB 5V short to ground
2) USB DC cable disconnection
3) Proceed 10 "No Power On (II)"
Is the 5V input to Q203 (E) and I203
pin 2
O K
N G
Failure point
1) L214 open
2) Printed wire broke between J201 and
Q203 (E) with I203 pin 2
Is High-Level output from I203 pin 1
O K
N G
Failure point
I203 failure
Is Low-Level at Q204 pin 1 (c)
O K
N G
Failure point
1) R233 open
2) Q204 Failure
Is the 5V output from Q203
O K
N G
Failure point
Q203 failure
Printed wire broke between Q203
output and I201 pin 1