Oki MICROLINE ML320 Maintenance Manual - page 233
of
354
The CHARACTER switch does not function.
The CHA SW signal on pin 6 of
is at low level when the CHA switch is pressed?
l
No
Replace
or LXSP board.
Yes The output signal on pin 12 of
or the input signals oh pins
1
and 19 of
occasionally drop to low level?
the output signal
the input signals on pins
Figure 29
No
The output signal on pin
10
of Q4 or the input signals on pins
and 13 of
occasionally rise to high level?
the output signal
the input
signals
on pins
Figure 30
l
No ReplaceQ4.
Yes Replace
Yes Replace
I-20