Power off condition

The DC controller turns off the product with the 24V POWER SUPPLY (24VRMT) signal, 5V POWER SUPPLY (VC5VOFF) signal, 3V POWER SUPPLY (VC3VOFF) signal, and VOLTAGE CONVERSION (PWRSAVE) signal.

+5VA and +5VC, are converted into +3.2V, and +3.3VA and supplied during the power off condition.

Fuser control

The fuser-control circuit controls the fuser temperature. The product uses an on-demand fusing method.

Figure 1-6Fuser components

Fuser control

circuit

FUSER HEATING CONTROL signal

Fuser heater

safety circuit

FUSER TEMPERATURE signal

Fuser sleeve

Table 1-10Fuser components

Type of component

Abbreviation

Name

Function

 

 

 

 

Heaters

H1

Fuser heater

Heats the fuser sleeve.

 

 

 

 

Thermistors

TH1

Main thermistor

Each thermistor detects the center

(Contact type)

 

 

temperature of the fuser sleeve.

 

 

 

TH2

Sub thermistor

Each thermistor detects the side

 

 

TH3

 

temperature of the fuser heater.

 

 

 

 

 

 

 

Thermoswitches

TP1

For the fuser heater

Controls the fuser-roller main

(Non-contact type)

 

 

heater

 

 

 

 

 

 

 

ENWW

Engine control system 15