Gestetner B003 Service Manual page 219

SP2 Mode Number
2913* 1* Print Density for Test
Pattern
2914* Process Control Setting –
By-pass
1*
Cα
2*
Cβ
3*
Bγ
4*
Bδ
2920 LD Off Check
2960* Toner Overflow Sensor
2964* 1* Transfer Cleaning Blade
Forming
SM
SERVICE PROGRAM MODE
Function and [Setting]
Sets the print density for the patterns printed with
SP2-902-3.
[0~15 / 15 / 1 ]
Adjusts the charge roller voltage for the following
items.
Adjusts the charge roller voltage 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 SP2-309-1.
Use this SP when an image problem (such as white
spots at the center of black dots or breaks in thin
black lines) occurs when paper with a small width is
fed from the by-pass feed tray.
[0 ~ 400 / 250 / 10V step]
Adjusts the charge roller voltage 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 ~ 400 / 50 / 10V step]
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 SP2-309-1.
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 / 200 / 10V step]
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]
DFU
Selects whether the toner overflow sensor is
activated or not.
0 = No, 1 = Yes
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/ 3 / 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 coefficient of friction ( µ )
between the belt and the blade increases, and
could cause the blade to bend or scour the surface
of the belt.
5-13 B003/B004/B006/B007