Sharp ER-A770 (serv.man4) Service Manual ▷ View online
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
MCR I/F
VCC
MC
R C
N
RCP2#
RDD2#
CLS2#
RCP1#
RDD1#
CLS1#
VCC
1
2
3
4
5
6
7
8
CN11
504
5-0
810
FB
40
BLM31
X6
FB
37
FB
35
FB
14
FB
13
FB
12
R111
4.7
K
X6
R104
R95
R99
R108
R114
R110
10K
R103
10K
R94
10K
R100
10K
R109
10K
CLS1
CLS2
RDD1
RCP1
RDD2
RCP2
R115
10K
6/14
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
OPC2
VCC
C7
10
uF/
16V
C8
2
0.
1uF
C7
7
NU
RES_USART
CLK_USART
/RDH
/W
R
H
AH1
AH0
VCC
VCC
SL00
1
SL01
2
SL02
3
SL10
4
SL11
5
SL12
6
SL20
7
SL21
8
SL22
9
SL30
10
SL31
11
SL32
12
CD0
13
BRK0
14
TRNEMP0
15
RCVRDY0
16
TRNRDY0
17
CTS0
18
RCVDT0
19
VCC
20
GND
21
CI
0
22
RTS0
23
CS0
24
CD1
25
BRK1
26
TRNEMP1
27
RCVRDY1
28
TRNRDY1
29
CTS1
30
RCVDT1
31
CI
1
32
RTS1
33
CS1
34
CD2
35
TRNEMP2
36
RCVRDY2
37
TRNRDY2
38
CTS2
39
RCVDT2
40
CI
2
41
CS2
42
CD3
43
BRK3
44
TRNEMP3
45
RCVRDY3
46
TRNRDY3
47
CTS3
48
RCVDT3
49
CI
3
50
CS3
51
D0
52
D1
53
D2
54
D3
55
GND
56
D4
57
D5
58
D6
59
D7
60
GND
61
VCC
62
X1
63
X2
64
XOUT
65
TRCK
66
AB0
67
AB1
68
US1
C
H
69
PX
70
POF
71
RSRQ
72
TRV
73
RXDATA0
74
TXE
75
TRRQ
76
TRQ
1
77
TRQ
2
78
A0
79
A1
80
A2
81
A3
82
A4
83
A5
84
OPT
C
S
85
RD
86
WR
87
RES
88
DB0
89
DB1
90
DB2
91
DB3
92
GND
93
DB4
94
DB5
95
DB6
96
DB7
97
R
98
W
99
VCC
10
0
GND
10
1
RES
10
2
TRNCL
K
10
3
RCVCL
K
10
4
DBTST
10
5
UTST
10
6
CSA
10
7
TRNDTA
10
8
DTRA
10
9
RTSA
11
0
RCVDTA
11
1
CTSA
11
2
DSRA
11
3
TRNRDYA
11
4
RCVRDYA
11
5
TRNEMPA
11
6
SYCBKA
11
7
GND
11
8
CSB
11
9
TRNDTB
12
0
DTRB
12
1
RTSB
12
2
RCVDTB
12
3
CTSB
12
4
DSRB
12
5
TRNRDYB
12
6
RCVRDYB
12
7
TRNEMPB
12
8
SYCBKB
12
9
GND
13
0
CSC
13
1
TRNDTC
13
2
DTRC
13
3
RTSC
13
4
RCVDTC
13
5
CTSC
13
6
DSRC
13
7
TRNRDYC
13
8
RCVRDYC
13
9
TRNEMPC
14
0
SYCBKC
14
1
VCC
14
2
GND
14
3
CSD
14
4
TRNDTD
14
5
DTRD
14
6
RTSD
14
7
RCVDTD
14
8
CTSD
14
9
DSRD
15
0
TRNRDYD
15
1
RCVRDYD
15
2
TRNEMPD
15
3
SYCBKD
15
4
WIN
15
5
RI
N
15
6
RSL
C
T0
15
7
RSL
C
T1
15
8
RST
15
9
MCL
K
16
0
IC
1
0
OPC2
PLZ
BE SHORT PAT
TERN!
/DCD1
/C
TS
1
RCVDT1
/C
I1
/R
TS
1
BRK1
TRNEMP1
RCVRDY1
TRNRDY1
RCVDT1
VCC
R6
8
10
K
/S
IN
T
/S
RCS
D
[8
..15
]
/C
S
1
VCC
C1
03
33
0p
F
R5
9
10
K
X
3
C9
5
D8
D9
D1
0
D1
1
D1
2
D1
3
D1
4
/C
S
1
RCVDT1
TRNRDY1
RCVRDY1
TRNEMP1
BRK1
/S
RCS
TXD1
/D
TR
1
/D
S
R
1
VCC
R6
3
R6
6
R5
1
R5
2
R5
3
R5
4
R5
5
R5
7
R5
8
R6
0
10
K
X
10
D
B
[0
..7]
/W
R
H
/RDH
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
/W
R
H
/RDH
C9
8
C
7
8
C8
0
C8
3
C8
6
C8
8
C8
9
C9
2
C9
4
33
0p
F
X
10
C9
7
SRNRESET
/O
P
T
C
S
/RDO
/W
R
O
/R
E
S
A0
A1
A2
A3
A5
A4
/S
RESET
D1
5
/S
RESET
4
5
6
IC
6
B
74
LV0
8
1 2
IC
4
4
A
7
4
HC0
4
#
AH0
AH1
/P
O
F
F
/I
RQ
1
/T
RQ
2
/T
RQ
1
A
[0
..5
]
CLK_USART
AH0
AH1
VCC
FL
2
RCORF6
7
0
2
B
HZZ
R6
5
10
K
X
2
R6
7
C9
6
10
0p
F
X
2
C1
01
7P
IN
- -
- G
N
D
IC
44
14
PI
N - -
-
VCC
7P
IN
- -
- G
N
D
/S
RNRESET
/R
E
S
IC
6 1
4
PI
N
- -
- VCC
7/14
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
RS232
1
2
3
SW
2
SSSS312
R9
0
C6
3
10
0p
F
/C
I1
/DCD1
/C
I1
/DCD1
VCC
PF1
POLY SW
C5
8
33
0p
F
FB2
2
BLM
3
1
C4
9
33
0p
F
10
8
9
IC
3
C
SN
75
18
9
13
11
1
2
IC
3
D
SN
75
18
9
FB1
9
BLM
3
1
C5
2
10
0p
F
RCVDT1
/D
S
R
1
RCVDT2
14
15
12
13
10
11
8
11
6
3
2
5
4
7
6
9
IC
2
M
C
145
40
6
/R
T
S
1
+1
2V
-1
2V
/C
T
S
2
/C
T
S
1
TXD1
/D
T
R
1
TXD2
/D
T
R
2
/C
T
S
1
/D
T
R
1
/D
S
R
1
/R
T
S
1
/C
T
S
2
/D
T
R
2
TXD1
TXD2
RCVDT1
RCVDT2
VCC
14
15
12
13
10
11
8
11
6
3
2
5
4
7
6
9
IC
4
M
C
145
40
6
FB1
8
BLM
3
1
FB3
0
BLM
3
1
FB2
3
BLM
3
1
FB2
9
BLM
3
1
FB3
2
BLM
3
1
FB2
8
BLM
3
1
C6
1
10
0p
F
C5
6
10
0p
F
GND
CI
1
ER1
CS1
SD1
RS1
RD1
DR1
CD1
GND
CI
2
ER2
CS2
SD2
RS2
CHANNEL 1
CHANNEL
8
FOR DSUB
9
P
IN
FOR DSUB
9
P
IN
FB2
4
BLM
3
1
FB1
7
BLM
3
1
FB2
7
BLM
3
1
9
8
7
6
5
4
3
2
1
CN4
M
L
X 5
3
0
14-
091
0
9
8
7
6
5
4
3
2
1
CN5
8
M
L
X 5
3
0
14-
091
0
FB2
6
BLM
3
1
FB2
5
BLM
3
1
RD2
DR2
CD2
FB3
1
BLM
3
1
7P
IN
- -
- G
N
D
IC
3
14
P
IN
-
- -
V
C
C
C6
9
10
0p
F
/R
T
S
2
/C
I2
/DCD2
/D
S
R
2
/R
T
S
2
/C
I2
/DCD2
FB2
0
BLM
3
1
FB2
1
BLM
3
1
C5
7
33
0p
F
C4
8
33
0p
F
1
3
2
IC
3
A
SN
75
18
9
4
6
5
IC
3
B
SN
75
18
9
C6
2
10
0p
F
C5
1
10
0p
F
C7
1
10
0p
F
/D
S
R
2
8/14
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