Samsung SCX-82x0 series, Service Manual

Page: 74 / 399

2. Product Description
SAMSUNG ELECTRONICS Service Manual
2-56
2.10.3.1 DADF Original Drive Assembly
DADF-GUIDE PICK UP ASS’Y
CLUTCH-ELECTRIC
GEAR-PICKUP_IDLE SHAFT-PICKUP
After detecting the paper, one motor controls the drive system totally.
The CLUTCH-ELECTRIC provides the power to pick up the paper.
The CLUTCH can’t rotate inversely. The Spring that is included in DADF-GUIDE PICK UP ASS’Y is connected
to COVER-OPEN. When the CLUTCH does not drive, it makes Stand-by status and fix the stopper operation.
The ADF roller and Pick up Roller is connected by the belt.
The ADF roller is provided with the power while the paper is picked up and transferred to the Registration
roller. When the pick up drive is stopped and Registration roller is driven, the ADF roller become idle.
The normal process is :
• When the original is setting up, the detect-sensor is activated, and printing job starts, the motor and pick up
clutch work.
Then, the pick-up roller moves down and contacts an original in the tray.
• When the Registration sensor detects the paper, the pick up clutch stops.
• When the Detect-Sensor detects that the tray is empty, the motor stops and the machine enters stand-by
status.