Read Sharp AL-1217 (serv.man15) Service Manual online
AL-1226 ELECTRICAL SECTION 12 - 10
(8) Mirror motor control circuit, Duplex motor control circuit
Stepping motors are employed for the mirror motor, the SPF motor,
and the duplex motor. The driver for IC127 (for mirror motor) is the
bipolar drive L6219DS, and the driver for IC128 (for SPF) is the uni-
polar drive IC MTD1361F. For control, the SPF outputs the drive signal
from the CPU to the IC, and the mirror outputs the drive signal to the IC
with the ASIC. They drive each motor in 1-2 phase excitement or 2-
phase excitement.
and the duplex motor. The driver for IC127 (for mirror motor) is the
bipolar drive L6219DS, and the driver for IC128 (for SPF) is the uni-
polar drive IC MTD1361F. For control, the SPF outputs the drive signal
from the CPU to the IC, and the mirror outputs the drive signal to the IC
with the ASIC. They drive each motor in 1-2 phase excitement or 2-
phase excitement.
Each motor switches the motor current value in each magnification
ratio.
ratio.
• SPF motor drive circuit
• Mirror motor drive circuit
PGND
PGND
PGND
PGND
PGND
PGND
24VM
5V
PGND
SPMT_2
(SPMT2)
SPMT_0
SPMT_3
SPMT_1
SPMT_3
SPMT_1
MRPS_1
MRPS_2
MRPS_3
MRPS_2
MRPS_3
(SPMT0)
(SPMT3)
(SPMT1)
(SPMT3)
(SPMT1)
(5-C2)
(5-C2)
(5-C2)
(5-C2)
(5-C2)
(4-D2)
(4-D2)
(4-D2)
(4-D2)
(4-D2)
(4-D2)
(4-D2)
(9-D1)
(9-D1)
(9-D1)
(9-E1)
(9-E1)
¢ U T
R199
300J
300J
C211
2200p
R191
7.5kJ
C214
2200p
R194
7.5kJ
C218
2200p
C227
OPEN
C216
OPEN
C215
OPEN
C232
OPEN
C222
2200p
R198
2.4kJ
R203
2.4kJ
R195
1kJ
1kJ
R207
1kJ
1kJ
C220
0.1u
R200
620J
620J
R201
1.2kJ
1.2kJ
R202
100J
100J
R196
750J
750J
+
C219
47u/16V
R197
1J
2W
IC128
MTD1361/F
CrA
23
CrB
20
VsA
25
RsA
3
VrefA
24
VrefB
19
RsB
12
VsB
18
In /A
26
In A
27
In /B
17
In B
16
Vmm
22
OUT /A
1
OUT A
4
OUT /B
14
OUT B
11
PG
15
PG
28
D112
OPEN
D113
OPEN
D114
OPEN
D115
OPEN
R206
1J
2W
+
C217
47u/16V
47u/16V
5V
24VM
24V
5V
5V
24VM
PGND
PGND
PGND
PGND
24Vdup
PGND
PGND
PGND
PGND
PGND
PGND
MM_PH_A
OUT_A-
MM_AI0
MM_PH_B
MM_BI0
MM_BI1
MM_BI1
MM_AI1
OUT_A+
OUT_B-
MMref0
MMref1
MMref2
MMref1
MMref2
OUT_B+
(8-C3)
(8-C3)
(8-C3)
(8-C3)
(8-C3)
(8-C3)
(8-C3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(2-A3)
(5-C1)
(5-C1)
(5-C1)
(5-C1)
(5-C1)
CP101
ICP-N38
ICP-N38
C202
820p
820p
C203
820p
820p
C204
820p
820p
C207
0.1u
0.1u
C201
820p
820p
C205
0.1u
0.1u
+
C206
1u/16V
1u/16V
+
C208
47u/35V
47u/35V
D105
OPEN
R180
1.5kJ
1.5kJ
R178
0.68J
1W
1W
R182
30kJ
30kJ
R183
30kJ
30kJ
R179
1.5kJ
1.5kJ
R177
0.68J
1W
1W
R186
510J
510J
R185
1kJ
1kJ
R184
2kJ
2kJ
R181
1kJ
1kJ
IC127
L6219DS
OUT 2A
2
SENSE 2
3
COMP 2
4
OUT 2B
5
GND
6
GND
7
I02
8
I12
9
PHASE 2
10
VREF 2
11
RC 2
12
VSS
13
RC 1
14
VREF 1
15
PHASE 1
16
I11
17
GND
18
GND
19
I01
20
OUT 1B
21
COMP 1
22
SENSE 1
23
VS
24
OUT 1A
1
D106
OPEN
D107
OPEN
D108
OPEN
CP102
ICP-N38
ICP-N38
C209
0.1u/50V
C210
0.1u/50V
CP201
0603FA1.5A
0603FA1.5A
CP202
0603FA1.5A
0603FA1.5A
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