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H1 5 A AX ( AL 5 0 2 )
10. Chec k ing t he DC/ DC c onv e rt er c ir c uit
Check the output of 3.3V line voltage
from I308 pin 2.
Is the output FB321 being inputted
NG
to I308 pin 3?
Failure point
NG
OK
Printed wire broke between I308
OK
pin 3 and output of FB322.
Failure point
I308 failure
Failure point
Printed wire broke between I308 pin 2 and I300 power supply pin.
T ro ubl e Sho o t i ng
Page 13
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