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3
167
Chapter 3 Drum Section
3
2
1
+5V
GND
CN9-11
-12
-13
(6) Front Cover Sensor
Description
The front cover sensor detects opening and closing of the front cover. When it detects that the front
cover is open, "CLOSE FRONT COVER" is displayed on the LCD panel. When the front cover is
open, master making and printing are not performed. When the front cover sensor detects the front
cover opening during printing, the machine stops urgently. (During master making, the machine
stops when the front cover is opened.)
CLOSE
OPEN
Circuit
Front cover sensor
Red
Yellow
Blue
Main motor PCB unit
Photopassing: 0V
Photointerrupting: 5V
Operation
When the front cover is closed, the lever blocks the light of the sensor. When the front cover is
opened, the lever position is away from the sensor.
●
When the front cover is closed:
●
When the front cover is open:
Photointerrupted
Photopassed
Front cover sensor
7
Summary of Contents for DD 5450
Page 1: ...RICOH DD5450 DD5440 Machine Code C284 C283 Field Service Manual June 2016...
Page 2: ......
Page 15: ...Chapter 1 Dimensions 13 2 Dimensions 2 622 1405 555 228 1080 710 980 688 370 Unit mm...
Page 37: ...35 Chapter 2 Machine Installation 5 Touch OK DATE TIME is set 6 Touch END 1...
Page 170: ......
Page 262: ......