Read Sharp ER-A280 / ER-A280N / ER-A280F (serv.man5) Service Manual online
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
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