Testing For A Shorted Motor; Testing Motor And Solenoid Resistances; Table 6-2 Motor And Solenoid Resistances - Tektronix Phaser 360 Service Manual

6
Troubleshooting

Testing for a shorted motor

Testing motor and solenoid resistances

6-10 Phaser 360 Color Printer
1.
Reinstall the power supply if removed in the previous procedure.
2. Disconnect the process motor, the Y-axis motor, X-axis motor and the
cap/wipe/purge assembly motor wiring harness.
3. Turn on the printer again to see if it does not overload now that the
motors are disconnected from the power supply.
If the power supply is functional, move to the procedure, "Testing motor and
solenoid resistances" on page 6-10.
If the motors and solenoids are working properly, but the power supply still
does not function, replace it. Refer to the topic, "Power supply" on page 8-10.
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.

Table 6-2 Motor and solenoid resistances

Motor or solenoid
Process motor
Y-axis motor
X-axis motor
Cap/wipe/purge assembly motor
Head-tilt solenoid
Maintenance tray camshaft solenoid
Paper-pick solenoid
Transfix cam solenoid
In general, if you measure any low resistance, less than 4 ohms, 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
45 ohms
45 ohms
45 ohms
45 ohms