Service manual
Rev. 2.00
- 129 -
SRP-275
8-1-2 Paper feeding system
Paper feeding is performed by conveying the PF(Paper Feed) motor’s rotational power from the PF motor
pinion through the Gear reduction and Gear feeding.
Since the Shaft-rubber roller and Roller holder are pressed together, paper advances to the top of the
Rotator ass’y because of the friction between the rubber of the Shaft-rubber roller and the Roller holder.
Shaft-rubber roller
Paper
Gear feedingGear reduction
Pinion PF motor
Roller holder
Shaft-roller holder
As shown in figure, paper feeding system consists of Shaft-rubber roller, Roller holder, Motor-step, Gear
reduction and Gear feeding. The paper feeding operation can be selected by controlling the Motor-step.
Paper feeding is made as follows; As Motor-step set turning by electric signal, Shaft-rubber roller comes
into turning, passing Gear reduction. For Shaft-roller holder is pressed to Roller holder by Spring-roller
holder, paper is feed by friction. Pitch is 1/144″.
LF_B
LF_A
LF_An
LF_Bn
VCC_5V
VCC_24V
VCC_24V
VCC_5V
VCC_5V
C40
22p 1608
C48
22p 1608
R61
510 1% 1608
R64
10K 1% 1608
U17
TEA3718
1
2
3
4
5
6
7
8
9
11
13
14
15
16
12
10
MB
PT
VM1
GND1
GND2
VCC
I1
PHA
I0
Vref
GND4
VM2
MA
RS
GND3
COMP
R65
1K 1608
R67
0.5 1/2W DIP
R66
56K 1608
C50
820p 1608
C49
820p 1608
TP160
C37
100n 1608
R59
56K 1608
C38
100n 1608
R60
0.5 1/2W DIP
C42
820p 1608
C43
820p 1608
U15
TEA3718
1
2
3
4
5
6
7
8
9
11
13
14
15
16
12
10
MB
PT
VM1
GND1
GND2
VCC
I1
PHA
I0
Vref
GND4
VM2
MA
RS
GND3
COMP
C44
100n 1608
C45
100n 1608
R58
1K 1608
LF_IB1[4]
LF_IA1[4]
LF_PHB[4]
LF_IB0[4]
LF_IA0[4]
LF_PHA[4]