6-8
Phaser 440 Color Printer
6
Troubleshooting
Testing motor resistances
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.
Media jams and the paper path
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.
Required tools
■
#1 POSIDRIV® screwdriver
■
VOM
Table 6-1 Motor and solenoid resistances
Motor or solenoid
Resistance (approximately)
Paper-feed motor (white wire is pin 1)
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
Drum motor (white wire is pin 1)
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
Transfer roll take-up motor
45 ohms
Thermal head lift motor
35 ohms
Solenoids
150 ohms
Required tools
■
#1 POSIDRIV® screwdriver
■
VOM