Epson DFX-9000 Field Repair Guide
3/29/07
Troubleshooting
Printer Component,
Software Item,
LCD Display,
Printer Button
Page 121.
O4: LF Driver Error
Cause: Abnormal current to the
LF Motor
or one phase of the
LF Motor
was energized for too long a time period.
Action:
1.
Test all four (4) windings of the
LF Motor
(
Line Feed Motor
) with an ohmmeter (
See note below
). Each winding
of the
LF Motor
should have 0.5 - 0.6 ohms of resistance. If the resistance is incorrect, replace the
LF Motor
.
2.
Replace the
ROM Board
.
Note: A weak ohmmeter battery, uncalibrated ohmmeter, and ohmmeter test lead resistance will cause an
inaccurate resistance reading. To obtain an accurate resistance reading, test the LF Motor as follows:
1.
Set the ohmmeter on its lowest resistance scale.
2.
Short the ohmmeter test leads together and note the value displayed on the ohmmeter.
3.
Place the ohmmeter test leads across each of the
LF Motor
windings.
Subtract the value obtained in Step 2 from the each of the values displayed in Step 3. The result is the actual resis-
tance of the
LF Motor
.
O5: CR Error
Cause:
Carriage Motor
deceleration error.
Action:
1.
Inspect the
Carriage Encoder Sensor
(
CES Sensor
) for debris, physical damage, and proper cable seating in
its connector.
2.
Test the
Carriage Encoder Sensor
(
CES Sensor
). If there is no toggle, replace the
Carrier Unit
(
Carriage
Assy
).
3.
Replace the
ROM Board
.
