Ricoh B234 - Fusing Lamp and Fusing Temperature Control

FUSING
SM 6-149 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
6.16.4 FUSING LAMP AND FUSING TEMPERATURE CONTROL
Overview
A thermistor in permanent contact with the hot roller monitors the temperature of
the hot roller as it rotates. These temperature readings are used to control the
temperature of the hot roller by switching the fusing lamps on and off.
NOTE: The current temperature detected by the thermistor can be displayed with
SP1106.
Four thermostats mounted very close to the surface of the hot roller also monitor
the hot roller temperature. The thermostats trigger an SC code if the hot roller
overheats and the fusing unit shuts down.
There are three types of fusing lamps. Each is classified by which portion of the hot
roller it heats:
There are three fusing lamps inside the hot roller.
Fusing
Lamps
B234/B235/D101/D102 Fusing Lamps B236/D103 Fusing Lamps
1
2
3
The wattages of the fusing lamps are as shown below.
VOLTAGE/WATTAGE
NAME
B234/B235/D101/D102 B236/D103
Fusing Lamp 1 900 W (M: Red, R: Red)*
1
900 W (M: Red, R: Red)
Fusing Lamp 2 600 W (F/R: White) 600 W (F/R: Yellow)
Fusing Lamp 3 900 W (M: White, R: Blue) 900 W (M: White, R: Blue)
*
1
: F=Front, R=Rear