Table of Contents
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5-7 Key Data Input
Check Initial operation
the pin 12, 13, 14 and 15
of J403 low?
one of the keys is pushed,
one of pin 12,13,14 and 15 of J403
Key PCB is OK ?
5-7
Yes
Are
Yes
When
is high ?
Yes
Yes
END
No
Replace the PBA
No
Resolder pin 12,13,14 and 15
of J403
No
Replace the Key PCB
Flow chart of trouble shooting
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