Epson PH890 Service Manual page 75

EPSON Stylus Photo 890/1290
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 Load/Eject button 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
Load/Eject button 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 B
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