After drum or cleaning blade replacement, this SP dusts the drum and blade with toner to
reduce friction between the new drum and/or new blade, reducing the chance of scouring
the drum or bending the blade.
2924 Developer Mixing: Warmup DFU
1 Warm-up
This SP setting controls warm-up to prevent dark backgrounds in the first prints after a cold
start.
[0 to 2/1/1]
0: No warm-up control
1: Executes warm-up control only if the fusing temperature is below 50°C.
2: Executes warm-up control every time the machine is powered on, regardless of the fusing
temperature.
Warm-up timing.
• D046: 31.5 sec.
• D049: 22.3 sec.
2 Enable
If the drum seal is left open external light can fatigue the drum and cause horizontal banding
in prints. After the upper unit has been open, the charge corona is applied and the drum
operates so the drum can recover from drum fatigue.
[0 to 1/0/1]
0: (Upper unit opening/closing) drum initialization operates.
1: (Upper unit opening/closing) drum initialization does not operate.
However, each setting is affected by the following:
• "Toner-End Recovery" and "Drum Initialization"> Toner-end recovery executes. Drum
initialization is not done.
• "Warm-up Control" and "Drum Initialization"> Cold-start inching executes. Drum
initialization is not done.
• After the machine is turned on with the upper unit open, after the upper unit is closed
then the conditions described above exist.
The operation timing of drum initializing when the drum is opened and closed is:
• D046: 4.3 sec.
• D049: 3.0 sec.
8. Appendix: SP Mode Tables
128
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