Fusing Lamp And Fusing Temperature Control - Gestetner B070 Service Manual

6.16.4 FUSING LAMP AND FUSING TEMPERATURE CONTROL

Overview
This machine controls the fusing temperature of the hot roller by switching the
fusing lamps on and off. Three fusing lamps (each of different Wattage) are
mounted inside the hot roller.
NAME
Fusing Lamp A
Fusing Lamp B
Fusing Lamp C
The table below shows how the fusing temperature control method depends on the
mode.
DEFAULT VALUES
Standby Temp.
Fusing Lower Limit
Correction for Small Paper Size
Correction for Normal Paper Size
Correction for OHP
Correction for Tracing Paper
During long jobs some images may not fuse correctly, depending on variables such
as paper and image type, and room temperature. In such circumstances, a lower
limit is set to prevent paper feed and copying while a "Please Wait" message is
displayed to allow time for fusing temperature control to achieve the correct
temperature, then the job is re-started.
In most cases, the three fusing lamps never switch on together or in pairs. Usually,
the lamps are switched on and off one-by-one at 1 sec. intervals. When a small
paper size (smaller than A4/LT) is selected for a job, two lamps are switched on
and off at 4 sec. intervals during the job.
Warm-up
Here is a summary of how the machine operates differently during warmup,
depending on the temperature of the hot roller.
• Power On at Less Than 100°C. If the fusing unit is less than 100°C when the
machine is switched on, and auto process control executes.
• Power On at 100°C or Higher. If the fusing unit is 100°C or higher when the
machine is switched on, and auto process control does not execute.
• Door Opened Then Closed at Less Than 100°C. If one of the front doors is
opened to remove a jam or perform another procedure, if the fusing unit is less
than 100°C when the door is closed, and auto process control does not execute.
SM
CÓPIA NÃO CONTROLADA
WATTAGE
NA EUR/A
800 W 730 W Heats center of the hot roller.
530 W 530 W Heats length of the hot roller.
560 W 540 W Heats ends of the hot roller.
B070 B071
173°C SP1105 001
168°C
153°C SP1105 002
148°C
10°C SP1105 003
7°C
5°C SP1105 004
2°C
5°C SP1105 005
2°C
5°C SP1105 006
2°C
6-131
CÓPIA NÃO CONTROLADA
FUSING
FUNCTION
SP No.
168 ~ 178°C
148 ~ 158°C
0 to 10°C
0 to 10°C
-10 to +5°C
-10 to +5°C
B070/B071