Table 1-6 DC controller controlled components (continued) Component Designator Description Switch SW501 Cartridge-door switch SW502 Power switch Fuser-control circuit The fuser-control circuit monitors and controls the temperature in the fuser. The product uses on- demand fusing. The fuser-control circuit consists of the following major components:
● Fuser heater (H1); heats the fusing film ● Thermistor (TH1); detects the fuser temperature (contact type) ● Thermal fuse (FU1); prevents abnormal temperature rise in the fuser (contact type) Figure 1-8 Fuser control circuit Fuser film TH1 FU1 H1 Pressure roller FUSER TEMPERATURE signal Fuser heater control circuit circuit Fuser control DC controller Engine controller 12 Chapter 1 Theory of operation ENWW c