Epson DFX-9000 Field Repair Guide 3/29/07
Troubleshooting Printer Component, Software Item, LCD Display, Printer Button Page 129.
14: HCPP (Host-computer Controlled Paper Path) Error
Cause: Did not detect that paper path switching occurred during a paper path switching operation.
Action:
1. Check for proper connections at connectors CNSEN1 and CNSEN2 on the ROM Board.
2. Check for proper connection of the HCPP Sensor at connector CNPPSS on the Sensor Board.
3. Test the HCPP Sensor. If there is no toggle, replace the HCPP Sensor.
4. Test all four (4) windings of the HCPP Motor with an ohmmeter (See note below). Each winding of the HCPP
Motor should have 145 - 165 ohms of resistance. If the resistance is incorrect, replace the HCPP Motor.
5. 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 HCPP 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 HCPP 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 HCPP Motor.
15: O/C Driver Error
Cause: A winding in the O/C Motor was energized too long.
Action:
1. Check for proper connection of the O/C Motor at connector CNO/C on the Sensor Board.
2. Test all four (4) windings of the O/C Motor with an ohmmeter (See note below). Each winding of the O/C Motor
should have 72 - 88 ohms of resistance. If the resistance is incorrect, replace the O/C Motor.
3. Replace the ROM Board.
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