Ricoh J-P2 Service Manual page 205

17 January, 2003
Mode No.
1
(Class 1, 2, and 3)
910 [Idling Time] (Fusing Idling Time)
1 Idling Time
[Machine Temp.] Machine Temperature Correction
912
Th: Threshold, Heating or Pressure roller
Corrects the fusing temperature depending on the temperature inside the machine.
If the temperature inside the machine is too high or low, this may cause hot or cold offset
image at the fusing section. To avoid the offset image, the fusing temperature is corrected
depending on the temperature inside machine, which is monitored by the thermistor
located on the right side of the laser optics housing unit.
If the temperature inside the machine is detected as high or low (based on the settings of
SP1-912-001 or 002), the fusing temperature is decreased or increased by the
temperature specified in SP1-912-003 to 006.
Also see SP 1-917-1.
1 Th:High Temp
2 Th:Low Temp
3 H:High Temp
4 P:High Temp
5 H:Low Temp
6 P:Low Temp
[Temp. Cor. 1] Fusing Temperature Correction (Correction Timing)
913
1 Mode 1 185
2 Mode 1 125
3 Mode 1 62.5
PRINTER ENGINE SERVICE MODE
Function / [ Setting ]
*BCU Specifies the timer for deciding whether to do
fusing idling when receiving a print command.
When receiving a new job within the time specified
in this SP mode after the last job is completed,
fusing idling is not done because the fusing
section was already warmed up during the last
job.
[ 0 to 180 / 1 / 1 minute/step ] DFU
*BCU Sets the threshold for entering the high
temperature condition.
[ 0 to 50 / 30 / 1°C/step]
*BCU Sets the threshold for entering the low
temperature condition.
[ 0 to 50 / 17 / 1°C/step]
*BCU Sets the fusing temperature decrease for the high
temperature condition.
[ 0 to 15 / 0 / 1°C/step]
*BCU [ 0 to 15 / 0 / 1°C/step]
*BCU Sets the fusing temperature increase for the low
temperature condition.
[ 0 to 15 / 5 / 1°C/step]
*BCU [ 0 to 15 / 5 / 1°C/step]
*BCU Specifies the number of sheets to determine
whether or not to apply the fusing temperature
correction.
[ 1 to 255 / 5 / 1 sheet/step]
During a multi print job, the fusing temperature
tends to slightly overshoot around the 10th sheet
and then stabilize. Temperature overshooting may
cause the glossiness to increase.
To minimize the overshooting, both fusing and
pressure roller temperatures are decreased by the
amount specified in SP1-914 at the number of
sheets specified in this SP mode, until the end of
the job.
The temperatures are decreased in two steps.
Example: 125 mm/s line speed
First step (also called 'Mode 1'): After 5 sheets
(SP 1-913-2), temperature drops by 5C (SP 1-
914-2).
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