Correction For Paper Width And Thickness - Ricoh B291 Service Manual

DRUM CHARGE

6.8.3 CORRECTION FOR PAPER WIDTH AND THICKNESS

NOTE: This correction is done for the bypass tray only.
The by-pass tray can be used for non-standard paper narrower than sizes
accepted by the paper trays. Thicker paper, OHP sheets, etc. can also be loaded in
the by-pass tray but adjustments must be performed with the SP modes listed
below in order to avoid jams and copy quality problems.
SP Mode
SP2001 1 Charge Roller Bias Adjustment
SP2309 1 Paper Lower Width [a]
SP2309 2 Paper Upper Width [b]
SP2914 1 C-alpha
SP2914 2 C-beta
The way that these SP modes are used is shown below.
0 mm
Voltage:
SP2001 1 + SP2914 1
Default: -1500 + 150 V
For example, with the default settings, if the paper width fed from the by-pass tray
is 200 mm, the charge roller voltage will be –1500 +0 V.
B291/B295/B296/B297
CÓPIA NÃO CONTROLADA
SP Name
SP 2309 1
Default: 150 mm
Voltage:
SP2001 1 + SP2914 2
Default: -1500 + 0 V
CÓPIA NÃO CONTROLADA
Width 216 - 297 mm (Default: -1450 V)
Width limit (Default: 150 mm)
Width limit (Default: 216 mm)
Adjust 10V/step (Default: 150 V)
Adjust 10V/step (Default: 0 V)
SP 2309 2
Default: 216 mm
6-58
297 mm
Voltage:
SP2001 1
Default: -1500 V
B195D928.WMF
SM