Button Test; Charge Roll - IBM 3112 Service Manual

Button Test

To test the operator panel buttons:
1. Enter Diagnostics mode.
2. Select [HARDWARE TESTS].
3. Select [Button Test].
4. Press each button. [Closed] is displayed until the button is
released. Then [Open] is displayed.
5. Press Return to return to the Diagnostics mode main menu.

Charge Roll

This setting varies the charge roll bias. It is used to reduce
background on the output. In general, if there is background and the
environment is hot and humid, change the setting to low; if the
environment is cool and dry, change the setting to high. If the
background is not reduced, try changing the setting the other way.
1. Enter Diagnostics mode.
2. Select [PRINTER SETUP].
3. Select [Charge Roll].
4. Select [High], [Medium] or [Low].
5. Press Return to return to the Diagnostics mode main menu.
Diagnostic Aids
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