Epson FX 1170 Service Manual - Page 121
CH2:PIN, Cf-Il:PIN, CH1=2V, TlME=2ms, ncorrect, rinting, omputer
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Table 5-5. Repairing the BOARD ASSEMBLY, C094 MAIN (Continued) Problem Symptom Cause Checkpoint ~aper feed abnormal. The printer ICI is does not defective. feed the paper at all or the paper feed is irregular. Check the input signal (pin 2) and the output waveform (pin 3). I (CH2:PIN 3) k I :I * E b III IhII ! I II t IIII I i-l 1- ; [ [ k -WI! ( Cf-Il:PIN 2) -i m+ * 4 II I I Solution Replace ICI. CH1=2V CH2=50V r11 I ncorrect ]rinting of iata sent from the host :omputer. Data is corrupted when the parallel interface is used. Either IC4 or IC5 is defective. TlME=2ms I 1 Replace IC4 or IC5. 5-17
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Table 5-5. Repairing the BOARD ASSEMBLY, C094 MAIN (Continued)
Problem
Symptom
Cause
Checkpoint
Solution
~aper
feed
The printer
ICI is
Check the input signal (pin 2) and the output
Replace ICI.
abnormal.
does not
defective.
waveform (pin 3).
feed the
I
paper at all
(CH2:PIN
3)
or the paper
E
feed is
k
b
irregular.
I
:
I
*
I
I
I
I
h
I
I
I
II
t
I
I
I
I
I
II
I
I
!
i-l
1-
;
[
[
k
-WI!
(
Cf-Il:PIN
2)
-
i
m
+
*
4
CH1=2V
CH2=50V
TlME=2ms
r
1
1
I
I
1
ncorrect
Data is
Either
IC4
or
Replace
IC4
]rinting
of
corrupted
IC5
is
or
IC5.
iata
sent
when the
defective.
from
the
parallel
host
interface is
:omputer.
used.
5-17