Service manual

System Layout
SM 6-7 M000/M009
Detailed
Descriptions
6.3.4 FUSER
The fuser consists of the heat lamp, heat roller, pressure roller, thermistor and thermostat.
It bonds the toner to the paper with heat and pressure to complete the printing job.
 E-coil Heater: 750 W ± 5%
Thermostat
When heat lamp overheats, thermostat cuts off the main power to prevent overheating.
 Non-Contact type Thermostat
Heat roller
The heat roller transfers heat from the e-coil to apply heat on the paper. The surface of the
heat roller is coated with Teflon, so toner does not stick to the surface.
Pressure roller
The pressure roller mounted under the heat roller is made of silicon resin, and the surface
is also coated with Teflon. When a sheet of paper passes between the heat roller and
pressure roller, toner adheres to the surface of the paper permanently.
Items for safety
Protecting devices from overheating
 1st protection device: Hardware cuts off when overheated
 2nd protection device: Software cuts off when overheated
 3rd protection device: Thermostat cuts off main power.
Safety device
 Fuser power is cut when the front cover is opened
 Exercise caution when servicing parts near the fusing unit - allow fuser cover surface
to cool to under 80°C to avoid burns.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA