Epson Stylus COLOR 900 Service Manual page 77

EPSON Stylus COLOR 900/900N
3.1.1.5 Remedies for a Fatal Error
Fatal errors can be caused by defective motors and non-responsive
sensors. Check for problems in the order listed below to troubleshoot a
fatal error.
NOTE: If you answer "Yes" to a question listed under "Problem," take
the action described to the right under "Solution." If "No,"
proceed to the next step.
Table 3-12. Remedies for a Fatal Error
Step Problem
1 Has the CRHP Check the CRHP sensor visually. Connect the
sensor come off the connector properly. Make sure the connector is
printer mechanism connected to the indicated position on the relay
frame? board. Also, check that there is no dust or paper
debris in the sensor.
Is the connector for
the CRHP sensor
disconnected?
2 Has the encoder belt Referring to step 2 in
come off? that the encoder belt passes through the slot in the
sensor. Also check that the sensor is free from dust
and paper debris.
Solution
Table 3-6 on page 69, check
Table 3-13. Remedies for a Fatal Error
Step Problem
3 Has the ASF sensor Referring to the figure below, check that the ASF
come off? sensor is attached correctly.
Is the ASF sensor Check that both connectors 1 and 2 are securely
disconnected? connected.
4 Has a coil in the CR Measure each coil's resistance using a meter as
motor burned out? shown below.
Resistance: 5.8
Note: Be
sure to
measure the
resistance at
each pair of
points
shown at
right.
5 Has a coil in the PF Measure the internal coil resistance of the PF motor
motor burned out? in the same manner as for the CR motor.
Resistance: 8.1
Chapter 3 Troubleshooting
Solution
Ω ±
10%
S t e p 1
T o P i n 3
T o P i n 1
T o P i n 2
S t e p 2
C R M o t o r
T o P i n 4
Ω ±
10%
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