13: Hcpp (Host-Computer Controlled Paper Path) Driver Error - Epson DFX-9000 Repair Manual

Epson DFX-9000 Field Repair Guide
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.

13: HCPP (Host-computer Controlled Paper Path) Driver Error

Cause: A winding of the HCPP Motor was energized for too long a time period.
Action:
1. Test all four (4) windings of the HCPP Motor with an ohmmeter
Motor should have 145 - 165 ohms of resistance. If the resistance is incorrect, replace the HCPP 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 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.
Troubleshooting Printer Component, Software Item,
(See note below). Each winding of the HCPP
LCD Display, Printer Button
3/29/07
Page 128.