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R15AAC/AAU (vs15)
7.
Abnormal OSM display adjust problem
Check the input DC voltage level whether was changed
when pressed function keys on the P307 pin 8, 9. (normal is
low level, when push buttom, generated a DC level plus)
(Refer table 1)
OK
NG
Failure Point
1) Function key wire disconnection.
2) Function key wire is failure.
3) Function key board is failure.
4) R390, R391 are open
5) R371, R370 are open or short
6) R365, R366, R367, R368, R369 are open or short or not correct
assistance.
Failure Point
I311 is failure.
