Filter
Top Products
Check the 5V is output from P301 pin 5,6
OK
NG
Failure Point
1) Power wire disconnection.
2) Power board is failure.
Check the 5V is input to I301 pin3.
OK
NG
Failure Point
1) Printed wire broke between P301 pin 5,6
and I308 pin3.
Check the 3.3V is output from I301 pin2, 4.
Failure Point
I301 is failure or C303,C304 short.
OK
NG
Check the 3.3V is input to I309 pin3.
OK
NG
Failure Point
1) Printed wire broke between I302 pin2. 4 and
I309 pin3.
Check the 1.8V is output from I309 pin2,4.
Failure Point
I309 failure or C368 short.
OK
NG
Failure Point
1) Printed wire broke between I301 pin2,4,I309 pin3,2,4
and I308
2) FB309,FB310 is open.
5.11 Checking the DC/DC converter circuit
Go to cover page
30
5. Troubleshooting (continued)
ACER X193HQ