Paper Feed Magnet; Fuser Drive Gear Backlash - IBM 3112 Service Manual

Paper Feed Magnet

1. Remove the RIP board. (See "RIP Board, Inner EMC Shield,
and Engine Board Removal" on page 91.)The magnet is
accessed through the holes in the right frame.
2. With the armature latched on the cam step check for 0.60 mm
+/- 0.07 mm (0.024 in +/- 0.003) between the foam pad and the
magnet pole piece.
Note: Don't let the sound deadening material on the armature
interfere with the adjustment.
3. Keep the armature latched and loosen the magnet mounting
screw.
Note: The flat side of the D-roll is down when the feed is
latched.
4. Insert feeler gage.
5. Rotate the magnet against the feeler gage.
6. Tighten the mounting screw.
7. The gage should pass between the foam pad and the magnet
pole piece with moderate resistance.

Fuser Drive Gear Backlash

Fuser drive gear backlash is adjusted so that when gear #2 is held still,
there is a slight amount of backlash in the fuser gear. Print quality can
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Service Manual