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5.9 Checking the DC/DC converter circuit
Check if the 5V is output
from P301 pin1, pin2, pin3, pin4
to I301, I303, I320 pin3.
Check if the 3.3V, 2.5V
and 1.8V line voltage is output
from I301, I302, I303 pin2
OK
Failure Point
Printedwireisbrokenbetween
P301 pin1, pin2, pin3, pin4 and
I301, I303, I320 pin3.
NG
NG
OK
Failure Point
Printed wire is broken
between I301, I302, I303
pin2, and I314 power supply
pin.
Is the output
FB301 being supplied to
I301, I303, I320 pin3?
Failure Point
Printedwireisbroken
between I301, I303, I320
pin3 and output of FB301
Failure Point
I301, I303, I320 is defected.
OK
NG
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5. Troubleshooting (continued)
ACER G24