Samsung SCX4521F - B/W Laser - All-in-One Service Manual page 33

7) Motor Driver speed & method
(a) FAX Transmission
- Normal Mode : 2000 pps
- Fine Mode : 1000 pps
- Super Fine Mode : 667 pps
(b) Copy Job : 667 pps, 2-2
- max(30sheets) : 50gf
- min(1sheets) : 20gf
8) Document Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
9) Regi Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA
- max voltage : 3.3V
(d) Output - Logic "H" : No Paper
- Logic "L" : Paper
(e) Lever-Sensor DOC : ADF Lower Torsion Spring
10) Document Scan sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED : - Max current : 50mA
- Max Voltage : 3.3V
(d) Output - Logic "H" : Off(No Position), No Paper
- Logic "L" : On (Doc Position), Paper
(e) LEVER - SENSOR SCAN : Scan Lower Torsion Spring
Samsung Electronics
System Overview
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