Service manual

Samsung Electronics 6-23
6-1-6-3. LF (LINE FEED) MOTOR DRIVING CIRCUIT
LF motor is driven to feed and eject documents and paper.
- Motor Type: stepper motor, bi-polar
- Driving Voltage : +30V
- Winding Resistance : 12Ω ± 10%
- Driving IC : PBL3717A× 2
6-1-6-4. TX(TRANSMISSION) MOTOR DRIVING CIRCUIT
TX Motor is driven at maximum 1200pps when feeding or ejecting sheets.
- Motor Type: stepper motor
- Driving Voltage : +30V
- Winding Resistance : 4.6Ω ± 10%
- Step Degree : 7.5 deg/step
- Driving IC : PBL3717A× 2
L F I A 1 L F I A 0 C U R R E N T ( m A ) O P E R AT I O N R E M A R K
L L 6 7 0 When feeding document/paper
L H 4 0 0 When ejecting document/paper
X H 0 No current
T X I A 1 T X I A 0 C U R R E N T ( m A ) O P E R AT I O N R E M A R K
L L 6 7 0 Quick Scan/Fine/Super Fine
H L 2 2 1 S t a n d b y
H H 0 I d l e
MODE PHASE S P E E D R E M A R K
Quick Scan 2–2 phase 1 2 0 0 p p s
F i n e 1–2 phase 4 0 0 p p s
Super Fine 2–2 phase 4 0 0 p p s
Driving speed for each mode