Specifications

Table 5-6. Repair of the Main Board (Cont.)
Symptom Conditon
Cause
Checkpoint
Solution
The top
TE motor
ICI 2 is Check
the output signal at pin 21, 22, 23 and
Replace
edge hold- does not ro-
defective. 24 of IC 12.
Ic12.
ing
mecha-
tate at all.
nism does
ICI 8 is
Check the output signal of IC 18.
Replace
not operate
defective.
normally.
IC 18.
The pump The pump
IC12 or
Check the waveform at pin 1 and 2 of ICI 2
Replace
does not op- motor does
IC16 is
and pin 15 and 9 of
IC 16.
IC12 or 16.
crate
not rotate at defective.
normally
all.
Abnormal Data is not
ICI 2 is
Check the input/output signal of IC 12.
Replace
print in un- received defective.
Ic12.
line mode.
normally.
5-17