Gestetner B147 Service Manual page 300

COPY SERVICE MODE
1-912 [Machine Temp. Cor.] Machine Temperature Correction
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.
1-912-1 Th:High Temp
Sets the threshold for entering the high temperature condition.
1-912-2 Th:Low Temp
Sets the threshold for entering the low temperature condition.
1-912-3 H:High Temp
Sets the fusing temperature decrease for the high temperature condition.
1-912-4 P:High Temp
1-912-5 H:Low Temp
Sets the fusing temperature increase for the low temperature condition.
1-912-6 P:Low Temp
1-913 [Temperature. Cor. 1] Fusing Temperature Correction (Correction Timing)
Specifies the number of sheets to determine whether or not to apply the fusing
temperature correction.
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).
Second step (also called 'Mode 2'): After 20 sheets (SP 1-913-7), temperature drops
by 10C (SP 1-914-7).
Narrow: LT/A4 SEF width or less
Wide: Wider than LT/A4 SEF
1-913-1 Mode 1 185
1-913-2 Mode 1 125
1-913-3 Mode 1 62.5
1-913-4 Mode 1 OHP narrow
1-913-5 Mode 1 185 wide
1-913-6 Mode 2 185
1-913-7 Mode 2 125
1-913-8 Mode 2 62.5
1-913-9 Mode 2 185 narrow
1-913-10 Mode 2 185 wide
B147/B149/B190
*BCU
[ 0 to 50 / 30 / 1°C/step]
*BCU
[ 0 to 50 / 17 / 1°C/step]
*BCU
[ 0 to 15 / 0 / 1°C/step]
*BCU
[ 0 to 15 / 0 / 1°C/step]
*BCU
[ 0 to 15 / 5 / 1°C/step]
*BCU
[ 0 to 15 / 5 / 1°C/step]
*BCU [ 1 to 255 / 5 / 1 sheet/step ]
*BCU [ 1 to 255 / 5 / 1 sheet/step ]
*BCU [ 1 to 255 / 5 / 1 sheet/step ]
*BCU [ 1 to 255 / 5 / 1 sheet/step ]
*BCU [ 1 to 255 / 10 / 1 sheet/step ]
*BCU [ 1 to 255 / 20 / 1 sheet/step ]
*BCU [ 1 to 255 / 20 / 1 sheet/step ]
*BCU [ 1 to 255 / 20 / 1 sheet/step ]
*BCU [ 1 to 255 / 10 / 1 sheet/step ]
*BCU [ 1 to 255 / 20 / 1 sheet/step ]
5-12 SM