Fuser Control; Fuser Control Method; Warm-Up Control - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

2.7.10 Fuser Control

2.7.10.1 Fuser Control Method

The Fuser temperature is controlled by turning the H/R Heater and the
P/R Heater ON/OFF as follows:
1. If the temperature on the surface of the Heat Roll is higher than the
Fuser control temperature, the power supplied to the H/R Heater
and P/R Heater is turned off. (Fuser temperature: Thermistor
detected temperature in the Temperature Sensor Assembly)
2. If the temperature on the surface of the Heat Roll is lower than the
Fuser control temperature, the power supplied to the H/R Heater
and P/R Heater is turned on. (Fuser temperature: Thermistor
detected temperature in the Temperature Sensor Assembly)
Chapter 2 Operating Principles

2.7.10.2 Warm-up Control

When Fuser Warm-up (Warm-up mode) starts, the H/R Heater and P/R
Heater are turned on. When the Fuser temperature reaches the Fuser
control temperature, Fuser Warm-up ends. The Fuser control
temperature in the Warm-up mode changes (described in the table
below) according to the Heat Roll surface temperature at Power ON.
Table 2-17. Warm-up Control
Heat Roll surface
Fuser control
temperature at
temperature
Power ON
[Standard [Temp.1] C
temperature: H] C
or higher
Less than [0.1t+b] C
[Standard
temperature: H] C
NOTE: The Fuser temperature in the Warm-up is corrected according to
the environment temperature (detected by the Environment
Sensor).
NOTE: When Fuser Warm-up is started, the Heater turns ON/OFF for a
predetermined duration and then remains ON.
NOTE: Thermal fuser and the thermostat are activated under the
following conditions:
• Thermal fuse: 141
• Thermostat: 180
Revision A
Description
Temp. 1 has been defined by the NVM
(MCU PWB).
Warm-up ends after 30 seconds from when
the Heat Roll surface temperature becomes
[0.1t+b] C (after Power ON) and the Fuser
control temperature becomes [Temp.1] C.
t: Fuser temperature at Power On
b: Compensation (Defined in NVM on the
MCU PWB.)
C
C
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