Paper Feed Tests; Permanent Page Count; Print Contrast - IBM 3112 Service Manual

Paper Feed Tests

This test allows you to observe the drive gear train and feed paper
through the printer to check for broken gear teeth, watch the paper
path, or check the erase lamps.
Note: You may want to remove the gear cover before starting this
test so you can observe the motor gears.
1. Enter Diagnostics mode.
2. Select [PAPER FEED TESTS].
3. Select [Tray 1], [Tray 2], [Feeder], or [Manual].
4. Select [Single] or [Continuous].
5. Select [CANCEL] to stop continuous.
6. Press Return to get back to Diagnostics mode main menu.

Permanent Page Count

The permanent page count can be displayed only. It cannot be
modified or reset by the customer or servicer.
1. Enter Diagnostics mode.
2. Select [PAGE COUNTS].
3. Select [Permanent Page Count].
4. Press Return to return to Diagnostics mode main menu.

Print Contrast

This setting varies the developer bias to vary the print darkness. If
the Print Darkness setting on the customer menu does not allow the
darkness to be set correctly, this setting can increase or decrease
the entire darkness range.
1. Enter Diagnostics mode.
2. Select [PRINTER SETUP].
3. Select [Print Contrast].
4. Select [Low], [Medium], or [High].
5. Press Return to return to the Diagnostics mode main menu.
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Service Manual