Ricoh Neptune-P1, Service Manual

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• The machine compares the Vsp value with Vsg, which is read from the bare sursection of
the drum (Vsg/Vsg=Vref)
• If Vsp/Vsg < Vref (the value of this SP setting), recovery is completed and the machine
goes back to normal operation.
2943 LED Duty Adj LED Duty Adjustment DFU
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 [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.
2 LPH2
3 LPH3
2944 LED Duty Rate LED Duty Rate DFU
This SP adjusts the power to the LPH.
[0 to 100/50/1%]
2952 LPH J Jnt Adj 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]
5. Service Tables
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