Acer AL1516W Service Manual page 29

ACER AL1516W
28
Go to cover page
5.8 Checking the resolution change IC movement
Check +3.3V supply on I305 pin8,
pin14, pin16, pin24 , pin32, pin49,
Check +1.8V supply on I305 pin
Check X301 14.318MHz clock
input to I305 pin96 and pin97 at
Check I305 pin 84 HWRESET
signal is low level at normal
Check I305 pin37, pin38, pin39,
(Same as the IIC signal).
Failure Point
I306 failure.
5. Troubleshooting (continued)
pin56, pin75, pin98
NG
OK
51, 66, 82, 34.
NG
OK
TTL level.
NG
OK
operation.
NG
OK
pin40 SPI signal
NG
OK
1) Power wire disconnection
2) Power board is failure
3) Checking FB311 and FB315
Proceed " Checking the DC/DC converter circuit" section.
Failure Point
1) Printed wire broke between X301 and I305 pin96, pin97.
2) C379, C380 is short or open.
3) X301 failure.
NG
Check if I309 pin2 is low.
Failure Point
1) Printer wire broke between I305 pin84 and I309
OK
pin2.
2) I309 is failure
3) I305 is failure
Failure Point
1) Printed wire broke between I305 pin37, pin38, pin39, pin40 and
I306 pin1, pin2, pin5, pin6.
2) I306 failure.
Failure Point
1) Printer wire broke between I305 pin84
and I309 pin2