Gestetner B147 Service Manual page 306

COPY SERVICE MODE
2-208 [Toner Supply Mode] Toner Supply Mode ([Color])
Selects the toner supply method.
2-208-1 [K]
2-208-2 [Y]
2-208-3 [M]
2-208-4 [C]
Sets the toner supply rate used when the toner supply method (SP2-208-1 to 4) is set
to '0' (fixed supply mode).
2-208-5 Fixed Rate [K]
2-208-6 Fixed Rate [Y]
2-208-7 Fixed Rate [M]
2-208-8 Fixed Rate [C]
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.
NOTE: The main switch must be turned off and on to effect the setting change.
2-208-9 Upper Limit
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.
2-208-10 LowCoverage[K]
2-208-11 LowCoverage[Y]
2-208-12 LowCoverage[M]
2-208-13 LowCoverage[C]
Specifies each constant to adjust the toner supply amount. The optimum value is
specified before shipment.
2-208-14 Vt Coeff[Bk]
2-208-15 Vt Coeff[Y]
2-208-16 Vt Coeff[M]
2-208-17 Vt Coeff[C]
Specifies each constant to adjust the toner supply amount. The optimum value is
specified before shipment.
2-208-18 Img Coeff[Bk]
2-208-19 Img Coeff[Y]
2-208-20 Img Coeff[M]
2-208-21 Img Coeff[C]
Specifies each constant to adjust the toner supply amount. The optimum value is
specified before shipment.
2-208-22 ImgCrctCoef[Bk]
2-208-23 ImgCrctCoef[Y]
2-208-24 ImgCrctCoef[M]
2-208-25 ImgCrctCoef[C]
B147/B149/B190
*BCU [ 0 to 2 / 1 / 1/step ] Alphanumeric
0: Fixed supply (with the supply rates stored
*BCU
with SP2-208-5 to 8)
*BCU
1: Fuzzy control supply
*BCU
2: Proportional control supply (using the Vref
values stored with SP2-224-5 to 8)
*BCU [ 0 to 100 / 5 / 1%/step ]
*BCU
*BCU
*BCU
*BCU [ 0 to 100 / 63 / 1 %/step ] DFU
#
*BCU [ 0 to 100 / 0 / 1 %/step ] DFU
*BCU [ 0 to 10.0 / 0.3 / 0.1 %/step ] DFU
*BCU [ 0 to 10.0 / 0.7 / 0.1 %/step ] DFU
*BCU [ 0 to 10.0 / 0.1 / 0.1 %/step ] DFU
5-18 SM