Ricoh B079, Service Manual

Page: 241 / 948

Service
Tables
SERVICE PROGRAM MODE
SM 5-15 B079/B082
SP2 Mode Number Function and [Setting]
2914* 4* B δ Adjusts the development bias used when paper
with a small width is fed from the by-pass tray. The
paper width below which the correction starts
depends on the value of SP2-309-2.
Use this SP when an image problem (see 2-914-1)
occurs when paper with a small width is fed from
the by-pass feed tray.
[0 ~ 300 /
50 / 10V step]
2920 LD Off Check DFU
2960 * Toner Overflow Sensor Selects whether the toner overflow sensor is
activated or not.
0 = No,
1 = Yes
2964* 1 * Transfer Cleaning Blade
Forming Applies a pattern of toner to the transfer belt at a
defined interval between sheets on the transfer belt
in order to reduce friction between the belt surface
and the cleaning blade.
[0 ~ 30/
0 / 1 sheets]
Under conditions of high temperature and high
humidity, the density control feature may reduce the
amount of toner, which also reduces the amount of
toner on the surface of the transfer belt. With less
toner on the belt, the friction between the belt and
the blade increases, and could cause the blade to
bend or scour the surface of the belt.
LD – PWM Selection
1 * Printer Output LD – PWM
Selection Changes the LD power PWM control for printed
copies. A smaller value produces a lighter image.
Use this SP to adjust the image density for printing
from a personal computer or printing a received fax
message.
1: 87.5% 2: 75% 3: 62.5%
2969 *
2 * Fax Output LD – PWM
Selection Changes the LD power PWM control for printed fax
messages. A smaller value produces a lighter
image
Use this SP to adjust the image density for printing
fax messages.
1: 87.5% 2: 75% 3: 62.5%
2971 Toner Full Sensor Count DFU
Grayscale Limit A new feature of this machine that controls the
halftone density level to prevent deterioration of the
OPC. The halftone density is detected by the ID
sensor, and the machine adjusts the intensity of the
LD beam according to the upper/lower limit setting.
1 * Upper Limit Defines the upper limit for grayscale.
A larger value allows a wider range of halftones at
the pale end of the scale. If the image contains pale
areas with fuzzy borders surrounded by dark areas,
reduce this value to make the borders clearer.
[0 ~ 100 / 60 / 1 step]
2972*
2 * Lower Limit Defines the lower limit for grayscale.
A smaller value allows a wider range of halftones at
the dark end of the scale.
[0 ~ 100 / 40 / 1 step]