Testing Motor Resistances; Media Jams And The Paper Path; Media-Based Problems; Table 6-1 Motor And Solenoid Resistances - Tektronix Phaser 440 Service Manual

6
Troubleshooting

Testing motor resistances

Media jams and the paper path

6-8 Phaser 440 Color Printer
Required tools
#1 POSIDRIV® screwdriver
VOM
With a VOM set for measuring resistance, test each motor's windings for its
correct resistance. Rotate the motor's drive shaft slightly while taking the
measurement.

Table 6-1 Motor and solenoid resistances

Motor or solenoid
Paper-feed motor (white wire is pin 1)
Drum motor (white wire is pin 1)
Transfer roll take-up motor
Thermal head lift motor
Solenoids
Required tools
#1 POSIDRIV® screwdriver
VOM
Jams fall into the following four categories:

Media-based problems

Paper-picking errors
Paper-clamping errors
Paper-ejecting errors
Media-based problems
1. Check that the correct type of media is being used. Be sure that the
printing side of the paper faces up in the tray.
Fanning the media eliminates its tendency to double-pick.
2. Inspect the paper for bent, torn or folded corners.
3. Ensure that the correct media is in the correct paper tray. The tray
indicates the size and the type of media loaded in the tray; the printer
does not directly sense the size or type of media.
Resistance (approximately)
60 ohms between pins 3, 4 and 5, 6
30 ohms between pins 1, 3 and 1, 4
30 ohms between pins 2, 5 and 2, 6
15 ohms between pins 1, 2 and 3, 4
7 ohms between pins 1, 5 and 2, 5
7 ohms between pins 3, 6 and 4, 6
45 ohms
35 ohms
150 ohms