Epson Stylus PHOTO 890 Service Manual page 73

EPSON Stylus Photo 890/1280/1290
Table 3-12. CR Motor does not Work
Step Checkpoint Action
1 Getting ready for Using an oscilloscope, check the outputwaveform at CN14
checking (CR motor connector) on the main board. For checking, press
waveforms. the Maintenance Switch to drive the CR motor.
NOTE: Be sure to disconnect the CR motor cable.
2 Checking the Drive the CR motor and check that the waveform shown below
waveforms to is output from each pin of CN14.
solve the
problem.
• If the waveform appears as shown, replace the CR motor.
• If not, replace the main control board.
TROUBLESHOOTING
Table 3-13. PF Motor does not Work
Step Checkpoint
1 Getting ready for
checking
waveforms.
2 Checking the
waveform to
solve the
problem.
Overview
Action
Using an oscilloscope, check the outputwaveform at CN13 (PF
motor connector) on the main board. For checking, press the
Maintenance Switch to drive the PF motor.
NOTE: Be sure to disconnect the PF motor cable.
Drive the PF motor and check that the waveform shown below
is output from each pin of CN13.
• If the waveform appears as shown, replace the PF motor.
• If not, replace the main control board.
Revision C
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