64 Chapter 2 Service tools EN
Developer test
The developer test rotates the carousel stopping at each toner cartridge
and rotating the developer sleeve. For the best view of the carousel and
the toner cartridge sleeves, remove the drum cartridge. The drum
drawer must be closed before the test can run.
1 Press the I
TEM key until ENGINE DIAGS DEVELOPER TEST is
displayed.
2 Press the S
ELECT key to run the test. The front panel displays
ENGINE DIAGS E2:DEVELOPER while the test is running. Watch the
carousel and make sure that the toner cartridge developer sleeve
rotates. The sequence is black followed by a pause, then magenta,
cyan, and finally yellow.
The test takes approximately 35 seconds. While the developer test is
running you will see the drum turn if it is installed, as well as the drive
gear for the ITB.
Drum test
The drum test exercises the drum drive mechanism. In addition, the
fuser motor is turned on to allow the lift cams for the ITB to be rotated
into the ITB up position.
1 Press the I
TEM key until ENGINE DIAGS DRUM TEST displays.
2 Press the SELECT key to run the test. The front panel displays
ENGINE DIAGS E3:DRUM while the test is running.
Watch to see if the ITB lift cams turn and if both the drum drive gear and
the ITB drive gear is rotating.
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