Isolating The Faulty Part According To The Phenomenon - Epson Stylus PHOTO 2000P Service Manual

EPSON Stylus PHOTO 2000P

3.1.3 Isolating the Faulty Part according to the Phenomenon

Refer to this section if you could not solve the problem in Section 3.1.1.1
or Section 3.1.2 or need more information to isolate the cause according
to the exhibited phenomenon. This section mostly covers the problems
relating to the main control circuit and other parts.
Table 3-11. Phenomenons Exhibited
No. Phenomenon Exhibited
1 CR motor does not rotate.
2 PF motor does not rotate.
3 Pump/ASF motor does not rotate.
4 Cleaning does not solve the print
problem.
TROUBLESHOOTING
Step
Table to refer to
Table 3-12
Table 3-13
Table 3-14
Table 3-15
Overview
Table 3-12. CR Motor does not Work
Checkpoint Action
1 Getting ready Using an oscilloscope, check the outputwaveform at
for checking CN14 (CR motor connector) on the main board. For
waveforms. checking, press the Load/Eject button to drive the CR
motor.
NOTE: Be sure to disconnect the CR motor cable.
NOTE: Ground one of the probes to the frame. The
connector itself has no ground line since the
CR motor is a bi-polar motor.
2 Checking the Drive the CR motor and check that the waveform
waveforms to shown below 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 or the CR
motor driver IC (IC18).
Revision A
20V 20µ
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