Fusing Lamp Control - Ricoh SP5 Series Service Manual

June 30, 1998

2.9.4 FUSING LAMP CONTROL

➀
A229D521.WMF
When the main switch is turned on, the CPU turns on the two fusing lamps.
When the fusing temperature reaches 180°C, the machine starts the process
control data initial setting. If the fusing temperature was already above 100°C when
the main switch was turned on, process control initial setting is not done.
When the CPU detects a fusing temperature of 200°C, the copier starts fusing
idling. The idling period can be adjusted with SP mode 1-103. If the fusing
temperature was already above 100°C when the main switch was turned on, the
copier does not go into the fusing idling mode.
When fusing idling has finished, the warm-up period is completed and the Ready
indicator turns on. After this, fusing temperature is kept at 185°C.
The CPU changes the fusing lamp on period depending on the temperature
measured by the thermistor to keep the fusing temperature as close as possible to
the target temperature.
200 °C
180 °C
➁ ➂
2-113
IMAGE FUSING
185 °C
➀
: Main switch on
➁
: Process control data
initial setting start
➂
: Idling start
➃
: Ready
➃