Samsung SCX-6320F, Service Manual

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Service Manual
Summary of Product
4-8
Samsung Electronics
4.2.6 DADF (Duplex Auto Document Feeder)
4.2.6.1 DADF Specification
• Duplex drive mechanism controlled by its own One Chip MICOM.
• It sends/receives command from the Main Board using UART.
- The 2 Motors, DADF MOTOR & DUPLEX MOTOR, are driven at a maximum of 2940pps.
- MOTOR DRIVER : A3977(Allegro) x 2EA
- Driving Power : 24V DC
- Driving Mode :
COPY : 1470pps
SCAN : 400pps ( 600dpi) ~ 2940pps (75dpi)
FAX : Super Fine : 1470pps (1-2phase)
Fine : 1470pps (2-2phase)
Normal : 1470pps (2-2phase)
Minimum Scan Line Time : 0.72msec -> 0.68ms
CCD Driving : 0.72msec -> 0.68ms
4.2.6.2 DADF Sensor
* DADF Capacity : 50sheets
4.2.6.3 DADF Rubber
Type Photo interrupt
Location ADF B'D
Heating area Max. current 50mA
Max. voltage 5V
Output Logic "H" Document present
Logic "L" Document not present
Location : Doc. Sensor To detect document in document feed tray
Doc. Width Sensor To detect document width
Doc. Length Sensor To detect document length
Regi Sensor For Document Registration
Scan Sensor To ready/end for CCD Module Scan
Gate Sensor To identify Duplex start point
Duplex Sensor For registration of document in Duplex path
Door Open Sensor To remove document jam in feed area
Exit Open Sensor To remove document jam in exit area
Material SI rubber
Life 20,000 sheets (A4 standard)
4.2.6.4 DADF Roller
Diameter 25.06mm
Material EPDM
Life 50,000 sheets (A4 standard)