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5 warm-up control, 5 warm-up control -106 – Konica Minolta 5430 DL 5440 DL 5450 User Manual

Page 143

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Fusing Section

Main Unit Theory of Operation

2-106

II Comp

osition

/O

p

eration

16.3.5

Warm-up control

• Control is provided until the Heating Roller reaches the predetermined level.
• The Power Save mode is not accepted during a warm-up cycle.

A. Control start timing
• The Power Switch is turned ON.
• A malfunction or media misfeed is reset.
• The machine leaves the Power Save mode.
• A door is closed.

B. Control termination timing
• A malfunction or media misfeed is reset.
• A door is opened.

C. Control start decision
• If the information provided by the Temperature/Humidity Sensor (HS1) is less than a pre-

determined value, the low temperature start control is provided.

• If the information provided by the Temperature/Humidity Sensor (HS1) is the predeter-

mined value or more, the ordinary start control is provided.

D. Low temperature start control
1.

The “single reference temperature adjustment” is started with the target temperature of
the Heating Roller Heater Lamp set at 80°C + correction value. At the same time, the
“single reference temperature adjustment” is started with the target temperature of the
Fusing Pressure Roller Heater Lamp set at 10°C.

2.

The control proceeds to “ordinary start control” after the lapse of a predetermined
period of time after the Heating Roller temperature has reached the target value.

3.

The control proceeds to “heater OFF control” if an event of control termination timing
occurs during control.

Warm-up cycle control diagram during low temperature start

OFF

ON

HI

LOW

HI

LOW

Fusing Motor (M4)

Fusing Ready

Temperature control

Temperature control

Temperature control

Temperature control

Fusing

Pressure Roller

Heating Roller

Temperature (°C)

170 + ǩ

80 + ǩ

150

165

10

Heating Roller Heater Lamp

(H1) Remote

Fusing Pressure Roller

Heater Lamp (H2) Remote

Warm-up start

Fusing Unit rollers

and belt start

4138to2144e0

5430DL_5440DL_5450_TO_PDF.book 106 ページ 2005年4月12日 火曜日 午後4時49分