Acer X223 Manual de serviço - Página 30
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5.9 Checking the DC/DC converter circuit
Failure Point
1) Printed wire broke between I302 pin 2. 4,
Q306 pin1 and I305 VCTRL pin.
2) FB311, FB312, FB313, FB314, FB315, are
open.
5. Troubleshooting (continued)
Check the 5V is output from
P301 pin5, pin6.
NG
OK
Check the 5V is input to
I302 pin3.
NG
OK
Check the 3.3V is output
from I302 pin2, 4.
NG
OK
Check the 3.3V is input to
Q305 pin1.
NG
OK
Check the 1.8V is output
from D326 pin 1.
NG
OK
Failure Point
1) Power wire disconnection.
2) Power board is failure.
Failure Point
1) Printed wire broke between P301 pin5,
pin6, and I302 pin3.
Failure Point
I302 is failure.
Failure Point
Printed wire broke between I302 pin2, pin4
and Q305 pin1.
Failure Point
D326 is failure.
29
ACER X223W
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