Sharp ER-A280 / ER-A280N / ER-A280F (serv.man5) Service Manual ▷ View online
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 7
■
PRINTER /
WINDING MO
T
O
R
7/12
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
OUT_A#
OUT_B
OUT_A
OUT_B#
L/R_A
VREF
L/R_B
IN1_A
OUT_A#
OUT_A
OUT_B
OUT_B#
IN2_A
IN1_A
IN2_A
L/R_A
IN1_B
IN2_B
IN1_B
IN2_B
L/R_B
VREF
PH1
PH3
PH2
PH4
CN15_1
CN15_2
CN15_1
CN15_2
VCC5
VCC5
VCC5
VCC5
VCC5
VMOT
VMOT
VMOT
VMOT
VCC5
VP
VMOT
VP
VCC5
VCC5
VCC5
VCC5
VCC5
OUT_A#
[6,10]
OUT_B
[6,10]
OUT_A
[6,10]
OUT_B#
[6,10]
VREF
[1]
PH1
[1]
PH2
[1]
PH3
[1]
PH4
[1]
WMOT
[1]
CN15_1
[10]
CN15_2
[10]
<<PRINTER STEPPING MOTOR for EPSON>>
STEPPING MOTOR
VREF=2.5v
Littel 372
VREF=2.5v
<<PRINTER WINDING MOTOR>>
WINDING MOTOR
(2.5mm)
7PIN : GND
14PIN : VCC5
C97
0.1uF
C95
0.01uF
R153
10K
C96
0.1uF
C93
0.01uF
IC9C
SN74HCT32PW
9
10
8
7
14
IC11
KIA431F
1
3
2
R151
10K/F
D20
(1SR154-400)
A
C
R146
47K
F4
T1.6A/250V SEMKO
R139
(15K)
C98
0.01uF
R147
47K
IC12
LB1843V
P-GND
1
P-GND
20
S-GND
11
VCC
6
OUT1
2
OUT1
3
OUT2
19
OUT2
18
Vm
4
Vm
5
NC
7
NC
8
Vref
9
NC
10
NC
16
L/R
17
DEL
15
IN2
14
IN1
13
RD
12
Q11
KTD1414
B
E
C
R138
(2.2K)
D18
(1SR154-400)
D18
A
C
IC9D
SN74HCT32PW
12
13
11
7
14
R143
1K/F
R144
3K/F
R145
47K
R152
0.75F [1/4W]
IC9A
SN74HCT32PW
1
2
3
7
14
CN10
(5267-02A-X)
1
2
C99
(NU)
R142
3K/F
D17
(1SR154-400)
A
C
R150
1K/F
R149
240
R136
0.75F [1/4W]
R137
10K
R148
47K
IC8
LB1843VLB1843V
P-GND
1
P-GND
20
S-GND
11
VCC
6
OUT1
2
OUT1
3
OUT2
19
OUT2
18
Vm
4
Vm
5
NC
7
NC
8
Vref
9
NC
10
NC
16
L/R
17
DEL
15
IN2
14
IN1
13
RD
12
IC9B
SN74HCT32PW
4
5
6
7
14
C94
0.01uF
D19
(1SR154-400)
A
C
IC10
CD74HC123PW
IC10
13
4
16
8
5
15
14
7
6
10
12
9
2
3
11
1
+
C92
100uF/16V SKV(6.3x5.5)/MVL(6.3x7.7)
+
1
2
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 8
■
SERIAL I/F - 1,2
8/12
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
RX_1
DCD1
TX_1
RTS1
DTR1
RX_2
DCD2
CTS2
DSR2
RI2
TX_2
RTS2
DTR2
RI2_sp
RTS2
DCD2
DTR2
TX_2
CTS2
RX_2
DSR2
RI2
DSR2
CTS1
EFTC#
DTR1
RTS1
DCD1
DTR1
TX_1
CTS1
RX_1
DSR1
TX_1
RTS1
RX_1
DSR1
RI1
DSR1
CTS1
RI1
DCD1
RI1
DTR2
TX_2
RI2_sp
RX_2
RTS2
CTS2
DCD2
GND-FRAME
GND-FRAME
VCC3
VCC5
VCC3
VCC5
VCC3
VCC5RS
VCC3
VCC3
VCC3
VCC3
GA_RTS1
[2]
GA_DTR1
[2]
GA_SOUT1RS
[2]
GA_SOUT2
[2]
GA_RTS2
[2]
GA_DTR2
[2]
EFTC#
[10]
EFT_DTR#
[10]
EFT_SOUT
[10]
GA_SIN1RS
[2]
EFT_RTS#
[10]
GA_DCD1
[2]
GA_RI1
[2]
GA_CTS1
[2]
GA_SIN2
[2]
GA_DSR1
[2]
GA_RI2
[2]
GA_CTS2
[2]
GA_DCD2
[2]
EFT_SIN
[10]
GA_DSR2
[2]
EFT_DCD#
[10]
EFT_CTS#
[10]
EFT_RI#
[10]
EFT_DSR#
[10]
CH2
1-2 NORMALLY SHORT
D-SUB CH1
FPGA-signal
D-SUB CH2
SCANNER & EFT
CH1
FPGA-signal
Littel 372
R167
100
C116
0.1uF
C110
1000pF
C110
1000pF
R175
10K
FB7
BLM21PG600SN1
C115
0.1uF
TP39
C121
1000pF
C101
0.1uF
R179
47K
R301
(10K)
C120 1000pF
R174
0
R159
100
TP38
TP34
IC14
ICL3241ECA/3243ECA
C1+
28
C1-
24
C2+
1
C2-
2
T1in
14
T2in
13
T3in
12
R1outB
21
R1out
19
R2out
18
R3out
17
R4out
16
R5out
15
EN#
23
GND
25
VCC
26
V+
27
V-
3
T1out
9
T2out
10
T3out
11
R2outB
20
R1in
4
R2in
5
R3in
6
R4in
7
R5in
8
SHDN#
22
FB5
BLM21PG600SN1
C119
1000pF
C102
2.2uF/10V CERAMIC
+
C113
10uF/16V SKV(4x5.5)
+
1
2
RP31
(10K_x4)
+-5%
3
2
1
4
5
6
7
8
R157
100
R302
(0)
R156
10K
R163
10K
TP44
C104
0.1uF
R172
0
R177
0
TP32
R158
100
SP5
ShortPin&Header
1
2
3
FB8
BLM21PG600SN1
R169
100
CN12
RS232 CN [D-SUB 9Pin]
DCD
1
RxD
2
TxD
3
DTR
4
GND
5
DSR
6
RTS
7
CTS
8
RI
9
FG
10
FG
11
C111
0.1uF
R171
0
R161
100
F5
T500mA/250V SEMKO
R160
100
C109
1000pF
C109
1000pF
R176
10K
FB9
BLM21PG600SN1
C100
0.1uF0.1uF
IC13
ICL3241ECA/3243ECA
IC13
C1+
28
C1-
24
C2+
1
C2-
2
T1in
14
T2in
13
T3in
12
R1outB
21
R1out
19
R2out
18
R3out
17
R4out
16
R5out
15
EN#
23
GND
25
VCC
26
V+
27
V-
3
T1out
9
T2out
10
T3out
11
R2outB
20
R1in
4
R2in
5
R3in
6
R4in
7
R5in
8
SHDN#
22
TP29
R173
10K
C105
0.1uF
R166
100
TP41
R165
100
R168
100
TP31
TP43
FB4
BLM21PG600SN1
TP28
C108
1000pF
C108
1000pF
C103
0.1uF
TP33
TP45
IC15
SN74LV157APW
IC15
SELECT
1
1A
2
1B
3
1Y
4
2A
5
2B
6
2Y
7
GND
8
3Y
9
3B
10
3A
11
4Y
12
4B
13
4A
14
STROBE
15
VCC
16
C107
1000pF
C107
1000pF
R154
10K
R178
0
R178
0
CN11
RS232 CN [D-SUB 9Pin]
CN11
DCD
1
RxD
2
TxD
3
DTR
4
GND
5
DSR
6
RTS
7
CTS
8
RI
9
FG
10
FG
11
C118
1000pF
TP36
C114
0.1uF
R303
(0)
TP37
FB3
BLM21PG600SN1
C106
1000pF
C106
1000pF
R170
0
FB6
CIB32P600NE
TP40
TP30
R162
10K
R304
(0)
R164
10K
C117
1000pF
TP42
C112
0.1uF
TP35
R155
10K
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 9
■
SERIAL I/F - 3,4
9/12
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
DCD4
CTS4
RTS4
DTR4
TX_4
RX_4
DSR4
CTS4
RTS4
DTR4
TX_4
RX_4
DSR4
DCD3
RX_3
CTS3
DSR3
TX_3
DTR3
RTS3
DCD3_sp
DSR3
RX_3
DTR3
RTS3
TX_3
CTS3
DCD3_sp
DCD4
RX_4
CTS4
DSR4
TX_4
DTR4
RTS4
CTS3
RTS3
DTR3
TX_3
RX_3
DSR3
DCD4
DCD3
GND-FRAME
GND-FRAME
VCC3
VCC3
VCC5RS
VCC3
VCC3
VCC3
VCC3
GA_RTS3
[2]
GA_SOUT3
[2]
GA_DTR3
[2]
GA_RTS4
[2]
GA_SOUT4
[2]
GA_DTR4
[2]
GA_SIN3
[2]
GA_DCD3
[2]
GA_CTS3
[2]
GA_DSR3
[2]
GA_SIN4
[2]
GA_DCD4
[2]
GA_CTS4
[2]
GA_DSR4
[2]
RJ45 CH3
RJ45 CH4
FPGA-signal
FPGA-signal
FB13
BLM21PG600SN1
TP60
TP50
FB15
BLM21PG600SN1
C122
0.1uF
R194
100
R183
100
C126
0.1uF
TP56
TP59
R182
10K
R191
100
R195
10K
TP48
TP57
C138
1000pF
C136
0.1uF
R184
100
C135
0.1uF
C123
0.1uF
FB12
BLM21PG600SN1
TP61
TP51
TP46
R187
10K
R189
10K
R181
10K
CN14
RJ45
RTS
1
DTR
2
TxD
3
dcd/ri
4
GND
5
RxD
6
DSR
7
CTS
8
FG
9
FG
10
R186
100
C127
0.1uF
TP53
R180
10K
RP32
(10K_x4)
+-5%+-5%
3
2
1
4
5
6
7
8
R190
10K
CN13
RJ45
RTS
1
DTR
2
TxD
3
dcd/ri
4
GND
5
RxD
6
DSR
7
CTS
8
FG
9
FG
10
C132
0.1uF
TP49
C128
1000pF
C133
0.1uF
C139
1000pF
C141
1000pF
C131
1000pF
SP6
ShortPin&Header
1
2
3
R188
10K
FB14
BLM21PG600SN1
C137
0.1uF
TP54
+
C124
10uF/16V SKV(4x5.5)
+
1
2
IC16
ICL3241ECA/3243ECA
C1+
28
C1-
24
C2+
1
C2-
2
T1in
14
T2in
13
T3in
12
R1outB
21
R1out
19
R2out
18
R3out
17
R4out
16
R5out
15
EN#
23
GND
25
VCC
26
V+
27
V-
3
T1out
9
T2out
10
T3out
11
R2outB
20
R1in
4
R2in
5
R3in
6
R4in
7
R5in
8
SHDN#
22
FB10
BLM21PG600SN1
IC17
ICL3241ECA/3243ECA
C1+
28
C1-
24
C2+
1
C2-
2
T1in
14
T2in
13
T3in
12
R1outB
21
R1out
19
R2out
18
R3out
17
R4out
16
R5out
15
EN#
23
GND
25
VCC
26
V+
27
V-
3
T1out
9
T2out
10
T3out
11
R2outB
20
R1in
4
R2in
5
R3in
6
R4in
7
R5in
8
SHDN#
22
TP47
R192
100
TP58
C140
1000pF
C125
0.1uF
FB11
BLM21PG600SN1
C130
1000pF
R185
100
FB16
CIB32P600NE
R193
100
+
C134
10uF/16V SKV(4x5.5)
+
1
2
C129
1000pF
TP55
RP33
(10K_x4)
+-5%+-5%
3
2
1
4
5
6
7
8
TP52
ER-A280F/A280N (V)
CIRCUIT DIAGRAM & PWB LAYOUT
8 – 10
■
EFT
, B
UZZER,
etc.
10/12
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
POFF#5V
EFT_RESET#
LD7
LD6
LD5
LD0
LD1
LD2
LD0
LD7
LD1
LD2
LD3
LD4
LD5
LD6
LD3
LD4
A2
A2
A0
A4
A[0..19]
A13
A3
A8
A10
A7
A17
A4
A5
A11
A18
A3
A14
A6
A5
A15
A19
A9
A12
A0
A1
A16
A1
EFTC#
RD#
WR#
POFF#5V
EFT_RESET#
VCC5
VCC5
VCC3
PE_LED
V_HEAD
VCC5
VCC3
VCC3
VLED
VCC5
LD[0..7]
[2,4]
CS1_EFT#
[2]
EFT_RI#
[8]
WR#
[1,2,3,5]
RD#
[1,2,3,5]
EFT_CTS#
[8]
EFT_DCD#
[8]
EFT_DSR#
[8]
BUZZ
[1]
A[0..19]
[1,2,3,5]
EFT_SIN
[8]
EFTC#
[8]
EFT_SOUT
[8]
EFT_DTR#
[8]
EFT_RTS#
[8]
RD#
[1,2,3,5]
WR#
[1,2,3,5]
DEV_RESET#
[1,2,3,4]
LD2
KR1
[2,4]
LD3
KR0
[1,4]
PESJ#
[2,6]
PESR#
[2,6]
PSTB6
[1,6]
KR7
[2,4]
PTM
[1,6]
PSTB4
[1,6]
PSTB5
[1,6]
PSTB2
[1,6]
OUT_B
[6,7]
OUT_A
[6,7]
OUT_A#
[6,7]
OUT_B#
[6,7]
PR_VH
[6]
PSTB1
[1,6]
PSTB3
[1,6]
KS3
[1,4]
KS2
[1,4]
KS1
[1,4]
LD4
LCD_E
[2,4]
KS0
[1,4]
D_dp
[2,4]
D_g
[2,4]
LD5
LCDON
[2,4]
R/W#
[2,4]
[2,4]
[2,4]
[2,4]
[2,4]
[2,4]
[2,4]
[2,4]
[2,4]
D_f
[2,4]
D_e
[2,4]
D_d
[2,4]
LD6
D_c
[2,4]
D_b
[2,4]
D_a
[2,4]
KR6
[2,4]
LD0
CS1_LCD#
[2,4]
KR5
[2,4]
LD1
CN15_1
[7]
CN15_2
[7]
LD7
KR4
[2,4]
LA0
[2,4]
CHK_KEY
[2,4]
KR3
[2,4]
KR2
[2,4]
POFF#
[1,11zz]
DEV_RESET#
[1,2,3,4]
E
2
DTC114EKA
1
3
B
C
+
GND(1)
OUT(3)
Buzzer-signal
from CPU
EFT
<PRINTER>
CN7 TP
<LCD>
CN10 TP
<KEY>
CN5 TP
CN4 TP
R201
10K
R201
10K
TP115
TP82
TP149
TP73TP73
TP113TP113
TP111
TP97
Q14
2SK3541
Q14
2SK3541
D
G
S
TP68TP68
Q12
DTC114EKA
Q12
DTC114EKA
B
E
C
TP64TP64
TP121TP121
TP104TP104
TP135TP135
TP80TP80
Q13
DTA114EKA
Q13
DTA114EKA
B
E
C
TP72TP72
TP63TP63
D21
1SS355
D21
1SS355
A
C
TP124
BZ1
BUZZER
BZ1
BUZZER
1
2
4
3
R200
(47K)
R200
(47K)
TP105TP105
TP116TP116
TP125TP125
TP95TP95
TP84TP84
J2
53553-0678 [molex]
J2
53553-0678 [molex]
2
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
TP151
C145
(100pF)
C145
(100pF)
TP117TP117
+
C147
+
C147
47uF/6.3V SKV(5x5.5)/
MVL(5x5.7)
1
2
TP90TP90
TP94TP94
TP141TP141
TP85TP85
TP74TP74
TP102
TP137
TP138TP138
TP128
TP75TP75
C152
1000pF
C152
1000pF
TP134
TP89TP89
TP99TP99
C146
0.1uF
C146
0.1uF
TP107
TP132TP132
TP66TP66
C167
0.1uF
C167
0.1uF
TP77
TP92
TP70TP70
TP153
TP71TP71
TP87
+
C143
33uF/10V SKV(5x5.5)/MVL(5x5.7)
+
C143
33uF/10V SKV(5x5.5)/MVL(5x5.7)
1
2
TP140
TP100TP100
TP112TP112
TP131
TP79TP79
R198
1K
R198
1K
TP109TP109
TP129TP129
TP120TP120
TP67TP67
TP69TP69
TP65TP65
TP127
TP62TP62
TP108TP108
C142
0.1uF
C142
0.1uF
TP123
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