IBM 3112, Service Manual

Page: 65 / 184

bh1s.bk : bh1saids.doc 49 Thu Apr 20 12:42:16 1995
Diagnostic Aids
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4. Select [Single] or [Continuous].
5. Select [Cancel] to stop continuous print.
6. Press Return to return to Diagnostics mode main menu.
Quick Disk Test
This is a one minute test which performs a non-destructive write/
read on one block per track on the disk. It tests the printer-to-disk
communications, and the disk hardware and circuitry, but does only
incidental testing of the disk surface itself.
The Quick Disk Test does not destroy data on the disk; existing data
is read and stored prior to the testing of each track, and then
rewritten after the track is tested.
1. Enter Diagnostics mode.
2. Select [DEVICE TESTS].
3. Select [Quick Disk Test].
4. The display will indicate [Test Passed] or [Test Failed].
5. Press Return to return to Diagnostics mode main menu.
Quick Test
The Quick Test is activated by pressing Ready from any screen
while in Diagnostics mode, as well as being an entry under [PRINT
REGISTRATION]. It provides a simple page alignment pattern that
prints faster than the other print tests.
Sensor Test
1. Enter Diagnostics mode.
2. Select [HARDWARE TESTS].
3. Select [Sensor Test].
4. Select one of the following sensor tests: Toner Low, Output Bin,
Input, Exit, or Cover Open.
5. When the sensor is blocked, [Open] will be displayed.
Otherwise, [Closed] will be displayed.
6. Press Return to return to the Diagnostics mode main menu.