Acer P243W Service Manual page 28

5.8 Checking the resolution change IC movement
Supplied on I314 pin107,
pin48, pin61, pin250, pin12, pin70,
pin170, pin184, pin203, pin216,
pin236, pin252, pin20, pin28,
supplied on I314 pin16, pin22,
pin50, pin2, pin78, pin96, pin143,
clock input to I314 pin35
and pin36 at TTL level
I314 pin9 at low level
5. Troubleshooting (continued)
Is there +3.3V
pin38, pin19, pin37,
pin131?
OK
Is there +1.8V
pin160, pin181,
pin225
OK
Is 14.318MHz
NG
during power on?
OK
Is +3.3V supplied to
(Reset again)?
NG
OK
Failure Point
I314 is defected.
Proceed to 5.9 Checking the DC/DC converter
NG
circuit section
Proceed to 5.9 Checking the DC/DC converter
NG
circuit section
Is 14.318MHz clock output
from X302 pin1 at TTL level
during power on?
Failure Point
Print wire is broken between X302
pin1 and I314, pin36
Check the output
of 3.3V H pulse from
I306 pin12
OK
Failure Point
Print wire is broken between I306
pin12 and I314 pin9.
ACER P243W
Go to cover page
Failure Point
X302 is defected.
Failure Point
NG I306 is defected.
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