Document Sensors - Ricoh ADF DF7010 Field Service Manual

(2) Document Sensors

Description
The ADF document sensor detects the presence of the document on the document tray. The ADF
document jam sensor and ADF document lead edge sensor detects the front and rear end of the
document. Five types of document detection are performed: detection of the document presence,
detection of the front end of the document, detection of the rear end of the document, detection of
the finish of the document, detection of document jam.
Circuit
ADF Document Lead Edge Sensor
ADF Document Jam Sensor
ADFDocument Sensor
Operation
ADF document jam sensor
ADF document lead edge sensor
3 +5V Red CN2-1
2 Light green
1 GND Blue
1 +5V Red CN2-4
2 Orange
3 GND Blue
1 +5V Rad CN2-7
2 Yellow
3 GND Blue
ADF document sensor
Chapter 2 3 Function of Parts and Circuit
ADF DRIVE PCB UNIT
5V
5V
-2
0
Photopassing: 0V
-3
Photointerrupting: 5V
5V
5V
-5
0
Photopassing: 0V
-6
Photointerrupting: 5V
5V
5V
-8
0
Photopassing: 0V
-9
Photointerrupting: 5V
5V
5V
5V
２
19