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5-3 Function Key Abnormal
Function Key Abnormal
Check I701 and
I703 missing?
No
Power
ON/OFF again and
check X701, oscillator
OK?
Yes
Check
I703 EEPROM content
OK?
Yes
Replace I701 and check
uP OK?
No
Check
pin 8 of I701
is 5V?
No
Replace I705, Q701,
Q702, R728
Put on
Yes
I701, I703
No
Replace X701
Replace I703 or do
No
ATE again
Yes
Replace I701
Check
Yes
ZD709, R735
VM77S
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