Testing Motor And Solenoid Resistances; Table 6-4 Motor And Solenoid Resistances - Tektronix Phaser 380 Service Manual

6
Troubleshooting

Testing motor and solenoid resistances

6-10 Phaser 380 Color Printer
1.
Turn off the printer and disconnect the power cord.
2. With a VOM 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 wire to
wire. All motors and solenoids should be open circuit to ground.

Table 6-4 Motor and solenoid resistances

Motor or solenoid
Process motor
Y-axis motor
X-axis motor
Cap/wipe/purge assembly motor
Media width sensor motor
Head-tilt solenoid
Paper-pick solenoid
Transfix cam solenoid
Air valve solenoid
Maintenance tray camshaft electric clutch
Upper feed roller electric clutch
Lower feed roller electric clutch
In general, if you measure any low resistance from a motor winding to ground
while the motor is installed, replace that motor.
Resistance (approximately)
3 ohms
2 ohms
60 ohms/phase
80 ohms/phase
15 ohms/phase
45 ohms
45 ohms
45 ohms
150 ohms
150 ohms
150 ohms
150 ohms