Ricoh B286, Service Manual, Page: 338 / 622

SP2-xxx Drum
B286/B289 5-68 SM
2943 LED Duty Adjustment
Adjusts the on timing (the “width” or “duty”) of the LEDs in the LPH units to
change image exposure. Use this SP if it is necessary to make the output of one
LPH block brighter or darker. Raising the setting creates darker pixels, lowering
the setting creates lighter pixels.
1 LPH1
2 LPH2
3 LPH3
[1.0 to 32.0/12.0/0.1%]
The optimum LPH settings are printed on the label that is attached
to LPH replacement units. Always input these settings immediately
after the LPH unit has been replaced.
2944 LED Duty Rate DFU
This SP adjusts the power to the LPH.
[0 to 100/50/1%]
2952 LPH Joint Adjustment
Adjust these settings only after you replace the LPH. For more, refer to
“Replacement and Adjustment.”
1 LPH1-2 Main Scan
Adjusts the LPH joint for main scan between
LPH1 and LPH2.
[0 to 999/500/1]
2 LPH2-3 Main Scan
Adjusts the LPH joint for main scan between
LPH2 and LPH3.
[0 to 999/500/1]
11 LPH1-2 Sub Scan
Adjusts sub scanning at LPH 1-2 for paper
more than 420 mm wide.
[300 to 500/412/1]
12 LPH2-3 Sub Scan
Adjusts sub scanning at LPH 2-3 for paper
more than 420 mm wide.
[2 to 100/16/1]