Fusing - Ricoh B202 Service Manual

FUSING

6.12 FUSING
6.12.1 OVERVIEW
13
12
11
1. Heating roller thermistor
2. Heating roller thermostat
3. Heating roller
4. Heating roller fusing lamp
5. Fusing belt
6. Pressure roller thermo fuse
7. Pressure roller thermistor
• A belt fusing system is used. This has a faster warm-up time than a conventional
hot and pressure roller system.
• The heating roller is made of aluminum to increase the temperature of the fusing
belt quickly.
• The hot roller is made of sponge, which flattens slightly, also increasing the
fusing nip. This roller does not contain a fusing lamp.
• Each of the heating and pressure rollers has a fusing lamp.
– NA: 770W for the heating roller. 350W for the pressure roller
– EU: 700W for the heating roller. 325W for the pressure roller
• The heating roller thermistor and pressure roller thermistor control the
temperature of these lamps.
• Temperature is normally controlled by turning the fusing lamps on and off. SP1-
104-1 is used to change between on/off control and phase control
• The oil supply roller supplies a small amount of oil to the pressure roller through
the cleaning roller. Oil does not need to be supplied to the oil supply roller
because it contains oil and the amount of oil supplied to the pressure roller is
small.
B202/B178/B180
10
9 8
B178D003.WMF
8. Pressure roller fusing lamp
9. Oil supply roller
10. Cleaning roller
11. Pressure roller
12. Hot roller
13. Tension roller
6-90
1
2
3
4
5
6
7
SM