PRINTER ENGINE SERVICE MODE
17 January, 2003
5-24
2
Mode No.
(Class 1, 2, and 3)
Function / [ Setting ]
9 Upper
Limit
*BCU
#
Specifies the maximum possible toner supply,
expressed as a percentage of the maximum
amount of toner that can possibly be supplied for
a sheet of paper.
If too much toner is supplied to the development
unit especially for black or in the low humidity
condition, this may cause dirty background due to
insufficient agitation. This SP mode limits the
maximum possible toner supply for black and only
in the low humidity condition for color.
[ 0 to 100 / 63 / 1 %/step ]
DFU
NOTE:
The main switch must be turned off and on
to effect the setting change.
10 LowCoverage[K]
11 LowCoverage[Y]
12 LowCoverage[M]
13 LowCoverage[C]
*BCU Adjusts the toner supply amount (fixed rate) when
making multiple prints of pages with low image
ratio (coverage).
When printing with a low image ratio, toner
concentration is controlled only with Vt outputs
since pixel count is not done for low image ratios.
This may cause the attraction force between toner
and carrier to increase, resulting in low image
density on outputs. To prevent this, the machine
counts the number of pixels and supplies a fixed
amount of toner if the accumulated number of
pixels becomes greater than the specified level.
[ 0 to 100 / 0 / 1 %/step ]
DFU
14 Vt
Coeff[Bk]
15 Vt
Coeff[Y]
16 Vt
Coeff[M]
17 Vt
Coeff[C]
*BCU Specifies each constant to adjust the toner supply
amount. The optimum value is specified before
shipment.
[ 0 to 10.0 / 0.3 / 0.1 %/step ]
DFU
18 Img
Coeff[Bk]
19 Img
Coeff[Y]
20 Img
Coeff[M]
21 Img
Coeff[C]
*BCU Specifies each constant to adjust the toner supply
amount. The optimum value is specified before
shipment.
[ 0 to 10.0 / 0.7 / 0.1 %/step ]
DFU
22 ImgCrctCoef[Bk]
23 ImgCrctCoef[Y]
24 ImgCrctCoef[M]
208
25 ImgCrctCoef[C]
*BCU Specifies each constant to adjust the toner supply
amount. The optimum value is specified before
shipment.
[ 0 to 10.0 / 0.1 / 0.1 %/step ]
DFU
[Toner Counter]
Toner Supply Counter ([Color])
5 [K]
*BCU
6 [Y]
*BCU
7 [M]
*BCU
210
8 [C]
*BCU
Displays the total time that the toner supply clutch
has been on.
This data is stored in the memory chip on each
toner cartridge.
[ 0 to 5000 / 0 / 1 second/step ]
[Toner Near/End]
Toner Near End / End Detection Threshold ([Color])
1 Start
[K]
*BCU
212
2 Start
[YMC]
*BCU
When the amount of toner amount left in the
cartridge becomes less than this value, the
machine starts monitoring the Vt values for toner
near end detection.
[ 0 to 1000 / 100 / 10 g/step ]