Ricoh G133 Service Manual page 732

Fusing
6.9 FUSING
6.9.1 OVERVIEW
1. Heating roller
2. Fusing belt
3. Thermopile
4. Tension roller
5. Fusing roller
6. Stripper plate
7. Stripper pawl
8. Pressure roller
9. Pressure roller fusing lamp
This machine uses an IH (Induction Heating) system for the heating roller. This system
increases the temperature more quickly than a fusing lamp heating system.
A belt fusing system is used. This has a faster warm-up time than a conventional fusing
and pressure roller system.
The fusing roller is made of sponge, which flattens slightly, also increasing the fusing
nip. This roller does not contain a fusing lamp.
The fusing belt thermistor, pressure roller thermistor and thermopile control the
temperature of heating roller and pressure roller. The thermopile is a non-contact
sensor. The thermopile detects the temperature at the center of the fusing belt, and the
G133
10. Cleaning roller
11. Lubricant roller
12. Pressure roller thermostat
13. Pressure roller thermistor
14. Fusing belt thermistor
15. Fusing belt sensor
16. Ferrite roller HP sensor
17. IH coil unit
18. Heating roller thermostat
6-60 SM