Epson EPL-6200L service manual Fusing Process, Fusing Temperature Control, Temperature Change

EPSON EPL-6200/EPL-6200L Revision A

2.2.5 Fusing Process

2.2.5.1 Overview

†In this process, the toner transferred to the paper in the transfer process is fused to the paper.

†For fusing, this printer uses the heat roller fusing system. The sheet with toner on passes between the heat roller, which is heated up by the fusing heater lamp, and the pressure roller. During this passage, heat and pressure are applied to permanently fuse the toner to the paper. (See “Figure 2-15”)

2.2.5.2 Fusing Temperature Control

TEMPERATURE CHANGE

See Figure 2-20 at right and Table 2-5 below for temperature change.

Table 2-5. Temperature Change

		Thermistor Temperature at Temperature Adjustment Start
		Below 50°C	50°C~125°C		125°C or above
Mode before	Power OFF		Mode 2		Mode 3
	Mode 1			Mode 1
Temperature		Mode 1
	Mode 2
Adjustment			Mode 2		Mode 3
	Mode 3

TEMPERATURE ADJUSTMENT CONTROL

†During warming up, the fuser temperature is raised up to the predetermined temperature.

†Warming up control is carried out at power on, at opening and closing of the front cover and at canceling of Pause mode.

†In standby mode, the fuser temperature is kept at 125°C, a little lower than the temperature during printing, to reduce power consumption.

†The temperature adjustment mode at restarting of temperature adjustment control (at power on, at opening and closing of the front cover or at canceling of Pause mode) is determined depending on the previous mode and the fuser temperature.

†In Pause mode (low power consumption mode), the fusing heater lamp is turned off to reduce power consumption.

Actuator

Fusing Separation Claw

Thermostat (TS1)

Paper Eject Sensor

Thermistor (TH1)

Pressure Roller

Fusing Heater Lamp

(H1)

Fusing Roller

Front Fusing Guide

Figure 2-19. Fusing Process

		Warming Up	Thermistor Detected Temperature
Temperature	200°C
	190°C		During Printing
			(600 dpi)
	160°C		During Printing
Fusing Roller	155°C
			(1200 dpi)
			During Standby
	125°C

Mode 1: 300 sec. Mode 2: 208 sec. Mode 3

Figure 2-20. Temperature Change

Operating Principles Description of Mechanisms 83