Xerox 8500DN Service Manual - Page 197

Testing Motor and Solenoid Resistances General Troubleshooting 1. Turn off the printer and disconnect the power cord. 2. With a DMM set for measuring resistance, test each motor's windings for correct resistance (disconnected from the printer). Rotate the motor's drive shaft slightly while taking the measurement. Motor and Solenoid Resistances Motor or Solenoid Resistance (Approximate) Process Drive motor Y-Axis Motor X-Axis Motor Media Path Drive motor Wiper drive clutch Paper-pick clutch Deskew clutch MPT Pick solenoid 4.3 ohms +/-15% (Difficult to measure due to variability at the brush/commutator interface.) 1.4 ohms +/- 15% (Difficult to measure due to variability at the brush/commutator interface.) 12.5 ohms/phase (red-to-yellow and blue-to-orange) 1.5 +/- 20% ohms 186 ohms +/- 15% 186 ohms +/- 15% 124 ohms +/- 5% Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-67