Samsung SF-4500 Service Manual page 54

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
LFIA1 LFIA0
L L
L H
X H
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
TXIA1 TXIA0
L L
H L
H H
Driving speed for each mode
MODE
Quick Scan
Fine
Super Fine
Samsung Electronics
CURRENT(mA)
670
400
0
CURRENT(mA)
670
221
0
PHASE
2–2 phase
1–2 phase
2–2 phase
OPERATION
When feeding document/paper
When ejecting document/paper
No current
OPERATION
Quick Scan/Fine/Super Fine
Standby
Idle
SPEED
1200pps
400pps
400pps
REMARK
REMARK
REMARK
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