Epson SQ-1170 Service Manual page 142

Conditon
Symptom
The carriage The carriage
does not op- does not op-
erate erate at all.
normally.
Table 5-6. Repair of the Main Board (Cont.)
Cause
Check the oscillator waveform at pins 27, 25,
32 and 31 of ICIO.
defective.
ICI 7 is At IC 17, compare the waveform at pin 2 with
that at pin 4.
defective.
Checkpoint
5-15
Solution
Replace
Ic 10.
Replace
Ic17.