5. Troubleshooting (continued)
5.8 Checking the resolution change IC movement
ACER G24 |
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Go to cover page
Is there +3.3V
Supplied on I314 pin107,
pin48, pin61, pin250, pin12, pin70, pin170, pin184, pin203, pin216, pin236, pin252, pin20, pin28, pin38, pin19, pin37,
pin131?
OK
Is there +1.8V
supplied on I314 pin16, pin22, pin50, pin2, pin78, pin96, pin143, pin160, pin181,
pin225
OK
Is 14.318MHz
clock input to I314 pin35 and pin36 at TTL level during power on?
OK
Is +3.3V supplied to I314 pin9 at low level (Reset again)?
OK
Failure Point
I314 is defected.
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NG |
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NG |
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| Is 14.318MHz clock output | Failure Point | ||||
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NG |
| from X302 pin1 at TTL level |
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| X302 is defected. |
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Failure Point
Print wire is broken between X302 pin1 and I314, pin36
NG |
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| of 3.3V “H” pulse from |
| NG |
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| OK |
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Failure Point
Print wire is broken between I306 pin12 and I314 pin9.