Epson DFX-9000 Field Repair Guide 3/29/07
Troubleshooting Printer Component, Software Item, LCD Display, Printer Button Page 127.
11: Ribbon Feed Driver Error
Cause: The Ribbon Feed Motor malfunctioned, one of the Ribbon Feed Motor drive circuits malfunctioned or a wind-
ing of the Ribbon Feed Motor was energized too long.
Action:
1. Test all four (4) windings of the RF Motor with an ohmmeter (See note below). Each winding of the RF Motor
should have 13.5 - 16.5 ohms of resistance. If the resistance is incorrect, replace the RF 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 RF 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 RF Motor windings.
Subtract the value obtained in Step 2 from each of the values displayed in Step 3. The result is the actual resistance
of the RF Motor.
12: Ribbon Jam Error
Cause: Could not detect ribbon motion.
Action:
1. Check that the ribbon cartridge is not jammed.
1. Test all four (4) windings of the RF Motor with an ohmmeter (See note below). Each winding of the RF Motor
should have 13.5 - 16.5 ohms of resistance. If the resistance is incorrect, replace the RF Motor.
2. Test the RF (Ribbon Feed) Sensor. If it does not toggle, replace the RF Unit.
3. 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 RF Motor as follows:
1. Set the ohmmeter on its lowest resistance scale.
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