IMAGE FUSING17 May, 1999
Fluorescent Lamp Flicker
Starting and stopping the fusing lamp power every second causes fluorescent
lighting in the room to flicker. To reduce this flickering, use SP1-108 to change the
cycle from 1 second to 3 seconds.
In addition, full power is applied to the fusing lamp gradually, not all at once. This
prevents the power in the room from dropping suddenly. This feature is known as
?Soft Start?. The machine does this by gradually allowing more power to the fusing
lamp over a number of zero-cross cycles of the ac supply. The diagram below
shows full power being applied gradually over the duration of 6 zero-cross cycles.
With SP1-107, this number can be set to 6, 10, or 20.
A250D888.WMF
Fusing Temperature Control for Thick Paper at the By-pass Tray
When thick paper mode is selected, the machine changes the target fusing
temperature from 180°C to 190°C.
This also happens when the machine detects A6 size. This is because the machine
automatically assumes that the A6 paper is a post card, and post cards should be
treated as thick paper.
Pre-heat Mode (Fusing Idling)
When the machine is powered on, or the right door is closed, the hot roller turns for
10 seconds.
If the SP1-103 setting is 1 (Yes), when the fusing thermistor detects a temperature
lower than 6°C,0 the hot roller turns for 60 seconds (instead of for just 10 s) after
the machine is powered on, or the right door is closed. This maintains conditions
for fusing copies made on thick paper during cold weather conditions.
To Prevent Offset when Making Multiple Copies on Small Paper
This prevents the temperature at the ends of the hot roller from being higher than
at the center.
If the smallest copy paper width detected during a one-minute interval is less than
220 mm, the machine lowers the target fusing temp°C.erature by 10
Then, during the next minute, if the smallest width detected is less than 220 mm
again, the machine lowers the target temperatur°C.e by another 5
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ACEC
