8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
C1
0
6
33
0p
F
7RS
_
R
S
23
2
1
996/1
1/1 POR
T T
Y
P
E
C
H
A
N
GED
/CI1,/CTS
1
,/DCD
1,T
R
N
RDY1
,RCV
DT
1
,R
C
V
R
D
Y
1
,TRNE
MP1,B
R
K
1
/CI2,/CTS
2
,/DCD
2,T
R
N
RDY2
,RCV
DT
2
,R
C
V
R
D
Y
2
,TRNE
MP2,B
R
K
2
/C
I1
/C
I1
C105
1
00p
F
C108
33
0pF
4
6
5
IC
9
B
75
189
1
3
2
IC
9
A
75
18
9
FB
1
1
0
FB
1
0
9
CI1
VC
C
IC
P
1
1
2
3
JP
3
VCC
-12
V
/D
CD1
C107
1
00p
F
/D
C
D
1
1
2
3
JP
2
1
2
3
JP
1
/C
T
S
2
/C
T
S
1
/C
S
1
D
B
[0
..7
]
DB0
DB1
DB2
DB
3
DB4
DB5
DB
6
DB7
CLOCK
33
RST
34
DSR
1
35
RTS
1
36
D
TR1
37
TR
NC
L
K
1
5
VC
C
40
GND
47
RC
V
C
LK1
39
W
6
CS
1
7
RC
V
R
DY1
10
SYN
C
/BR
K
1
29
CTS
1
30
T
RNEM
P
1
31
TR
NRD
Y
1
28
DB
0
41
DB
1
42
DB
2
44
DB3
45
DB
4
1
DB
5
2
DB
6
3
DB
7
4
CS
2
12
R
9
RS
LC
T
0
8
RS
LC
T
1
11
NC
14
NC
24
NC
38
NC
48
OP
E
N
19
OP
EN
43
T
RND
T1
32
RCVDT
1
46
T
RND
T2
22
DT
R2
26
RTS
2
25
RCVDT
2
13
CTS
2
20
DS
R2
23
TR
NC
L
K
2
15
RC
V
C
LK2
27
TR
NRD
Y
2
17
RCVRDY
2
16
T
RNEM
P
2
21
SYN
C
/BR
K
2
18
IC
5
M
B
89371
A
C113
1
00p
F
2-
6B
C1
14
1
00p
F
C1
16
10
0pF
/C
T
S
1
RCVDT
1
/D
T
R
1
/R
T
S
1
TX
D1
+1
2
V
14
15
12
13
10
11
8
1
16
3
2
5
4
7
6
9
IC
8
M
C
1
4
5406
FB
1
0
3
FB
105
FB
1
0
2
FB
101
FB
1
0
4
FB
1
0
6
GN
D
ER
1
CS
1
SD1
RS
1
RD
1
DR
1
VC
C
5
9
4
8
3
7
2
6
1
CO
N
3
CONNECT
OR D
B
9
CD
1
GND
CI2
IC
P
2
1
2
3
JP
4
5
9
4
8
3
7
2
6
1
CO
N
4
C
O
N
N
E
CTOR DB9
FB
1
1
1
FB
1
1
5
FB
114
14
15
12
13
10
11
8
1
16
3
2
5
4
7
6
9
IC11
M
C
14
5
406
/DSR1
TX
D
2
RCVDT
2
R
C
VDT2
C1
1
0
100pF
C1
1
2
10
0p
F
C111
10
0pF
TR
NRD
Y
1
RC
V
R
DY1
T
RNEM
P
1
BRK
1
/C
S
2
/W
R
H
/R
D
H
AH0
AH
1
RES_
U
S
ART
CLK_USART
VC
C
C115
0.
1
u
F
C6
10
uF
/1
6
V
VCC
TR
NRD
Y
2
RCVRDY
2
T
RNEM
P
2
BRK
2
/R
T
S
2
/D
T
R
2
/D
S
R
2
/R
T
S
2
/C
T
S
2
C102
33
0p
F
FB
1
1
6
FB
1
1
3
FB
1
1
2
ER
2
CS2
SD
2
RS
2
RD2
DR
2
CD
2
FB
1
0
7
FB
1
0
8
C1
0
4
33
0pF
10
8
9
IC
9
C
751
89
13
11
1
2
IC
9
D
75
189
/C
I2
C1
01
1
00p
F
/C
I2
/D
C
D
2
/D
CD2
C1
03
1
00p
F
BL
M
3
1
X
1
6
1/5
2-
1B
2-
7
B
2-
7
B
2-
7B
2-
7B
2-
7
B
2-
7B
2-2B
2-2A
2-6B
2-3C
2-
3B
2-3C
/RT
S
1
2-3B
2-
6B
2-6B
2-
3
B
2-
3
B
2-
3B
2-
3B
2-3B
2-3B
2-3B
2-3B
2-
6B
2-
6B
Summary of Contents for ER-A750
Page 3: ......
Page 8: ...CHAPTER2 OPTIONS 1 System configuration 2 1 ...
Page 32: ...7 2 2 Description of main LSI s 2 1 CPU HD6415108FX ...
Page 66: ...CHAPTER 8 PWB LAYOUT 1 Main PWB Side A 8 1 ...
Page 67: ...2 Main PWB Side B 8 2 ...
Page 68: ...3 Mother PWB Side A 4 CKDC PWB 8 3 ...
Page 69: ...5 Rear display PWB 6 Invator PWB 7 Noise filter PWB 8 4 ...