Epson 440 - Manual (Page 95)

EPSON Stylus Color 440/640/740 Revision A
Chapter 3 Troubleshooting 95
Paper feed operation is
abnormal. Paper feed motor does not
work. IC2 is dead. Stylus Color 440:
Check the waveform at
25, 18 pin of IC14.
Stylus Color 640:
Check the waveform at
43, 26 pin of IC16.
Stylus Color 740:
Check the waveform at
Pin 7 of IC12 and IC13.
Replace IC2
Stylus Color 440, 640:
IC15 is dead.
Stylus Color 740:
IC12 or IC13 is
dead.
Stylus Color 440:
Check the output
waveform of at 6-9 pin of
IC15.
Stylus Color 640:
Check the output
waveform of at 3,
6,18,21pin of IC15.
Stylus Color 740:
Check the output
waveform of at 10, 15
pin of IC12 and IC13.
Stylus Color 440, 640:
Replace IC15
Stylus Color 740:
Replace IC12, IC13.
Table 3-6. Unit Repair of Main Board
Symptoms Condition Cause Check Point Solution