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10. Checking the DC/DC converter circuit
Trouble Shooting
Check if the 5V is output from P310
pin 7, 8.
Printed wire broke between P310 pin
N G
O K
7, 8 and I323 pin 3.
Check the output of 3.3V line voltage
from I323 pin 2.
Is the output FB335 being inputted
N G
to I315 pin 3?
N G
O K
O K
Failure point
I323 failure
Failure point
Printed wire broke between I323 pin 2 and IC 315 power supply pin.
B17AAU / B17ANU / B17AAY
Failure point
Printed wire broke between I323
pin 3 and output of FB335.
Page 13
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