Ricoh J-P2 Service Manual page 213

17 January, 2003
Mode No.
2
(Class 1, 2, and 3)
212 5 Near [K]
6 Near [YMC]
7 End [K]
8 End [YMC]
9 Pixel [K]
10 Pixel [YMC]
11 Min. Print
12 sensor avg [K]
13 sensor avg [Y]
14 sensor avg [M]
15 sensor avg [C]
PRINTER ENGINE SERVICE MODE
Function / [ Setting ]
*BCU Specifies the threshold for toner near-end
detection.
*BCU
The machine detects toner near-end when the
following happens 10 times consecutively.
Vt > Vref + Threshold
[ 0 to 5.0 / 0.4 / 0.1 V/step ]
*BCU Specifies the threshold for toner end detection.
The machine detects toner end when the following
*BCU
happens 10 times consecutively. Then, the
machine stops printing, even during a print job.
Vt > Vref + Threshold
[ 0 to 5.0 / 0.5 / 0.1 V/step ]
*BCU Specifies the number of sheets with full image
coverage that can be printed after toner near-end
*BCU
has been detected.
When near-end is detected, the pixels in the
images are counted. The machine detects toner
end when the following happens, and the machine
stops printing even during a print job.
Pixel count = 5 A4/LT sheets with full
image coverage
[ 0 to 255 / 50 / 1 sheet/step ]
NOTE: The setting of SP2-212-11 has priority for
deciding when to stop printing.
*BCU Specifies the minimum number of sheets that can
be printed after toner near-end has been detected.
However, when the following happens 10
consecutive times, the machine stops printing
even during a print job or if this guaranteed
minimum has not been met.
Vt > Current Vref value + 1.2V or Vt > 4.8V
[ 0 to 50 / 10 / 1 sheet/step ]
*BCU Displays the average signal value of the toner end
sensor. Printed images can be weak when the
value is larger.
[ 0 to 1 / 0 / 0.01/step ]
Each toner sensor detects the toner that is falling
through the toner path beneath the toner
cartridge. Each sensor outputs "0" when it detects
toner in the toner path, or outputs "1" when it does
not detect toner. The signal is "1" if toner is not
passing through the path even though the toner
cartridge contains toner. These signals, "0" and
"1", are periodically checked and used to calculate
the signal average. When enough toner is in the
cartridge, the signal average is a smaller value
("0" or its vicinity). When toner is insufficient, the
average is a larger value ("1" or its vicinity).
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