Sharp ER-A880 (serv.man3) Service Manual ▷ View online
I
S
A BUS
2/
5
C1
1
C2
2
C3
3
C4
4
C5
5
C6
6
C7
7
C8
8
C9
9
C1
0
10
C1
1
11
C1
2
12
C1
3
13
C1
4
14
C1
5
15
C1
6
16
C1
7
17
C1
8
18
D1
19
D2
20
D3
21
D4
22
D5
23
D6
24
D7
25
D8
26
D9
27
D1
0
28
D1
1
29
D1
2
30
D1
3
31
D1
4
32
D1
5
33
D1
6
34
D1
7
35
D1
8
36
SL
2
SL
O
T
3
6
RE
S
E
T
IR
Q
9
VC
C
C
127
1000p
GN
D
+5
V
IR
Q
9
RE
S
E
T
SD
7
SD
6
SD
5
SD
4
A1
1
A2
2
A3
3
A4
4
A5
5
A6
6
A7
7
A8
8
A9
9
A1
0
10
A1
1
11
A1
2
12
A1
3
13
A1
4
14
A1
5
15
A1
6
16
A1
7
17
A1
8
18
A1
9
19
A2
0
20
A2
1
21
A2
2
22
A2
3
23
A2
4
24
A2
5
25
A2
6
26
A2
7
27
A2
8
28
A2
9
29
A3
0
30
A3
1
31
B1
32
B2
33
B3
34
B4
35
B5
36
B6
37
B7
38
B8
39
B9
40
B1
0
41
B1
1
42
B1
2
43
B1
3
44
B1
4
45
B1
5
46
B1
6
47
B1
7
48
B1
8
49
B1
9
50
B2
0
51
B2
1
52
B2
2
53
B2
3
54
B2
4
55
B2
5
56
B2
6
57
B2
7
58
B2
8
59
B2
9
60
B3
0
61
B3
1
62
SL
1
SL
O
T
6
2
SD
[0
..
7]
IO
RDY
AE
N
-
IO
R
D
Y
AE
N
-
SD
3
SD
2
SD
1
SD
0
DR
Q
2
GN
D
IO
W
-
IO
R
-
+1
2
V
DR
Q
2
IO
W
-
IRR-
D
100
1S
S
353
R
134
47
0
S
D
[8
..1
5]
SD
8
IO
16-
IR
Q
1
0
IR
Q
1
1
IR
Q
1
2
IR
Q
1
5
IR
Q
1
4
IR
Q
1
0
IR
Q
1
1
IR
Q
1
2
IR
Q
1
5
IR
Q
1
4
IO
16-
+5
V
GN
D
VC
C
C2
10u/
10V
O
S
SD
9
SD
1
0
SD
1
1
SD
1
2
SD
1
3
SD
1
4
SD
1
5
IR
Q
7
IR
Q
6
IR
Q
5
IR
Q
4
IR
Q
3
DA
C
K
2
-
TC
BA
L
E
C3
10u/
10V
O
S
IR
Q
7
IR
Q
6
IR
Q
5
IR
Q
4
IR
Q
3
DA
C
K
2
-
TC
BA
L
E
+5
V
GN
D
SA
9
SA
8
SA
7
SA
6
SA
5
SA
4
SA
3
SA
2
SA
1
SA
0
SA
[0
..
9]
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 12 –
RS
232C DRI
V
E
R/
RE
CE
IV
E
R
3/
5
FL
4
2
22
C
1
0
3
0.
1u
C1
1
2
0.
1
u
C
105
0.
1
u
C1
+
12
C1
-
14
C2
+
15
C2
-
16
T1
IN
7
T2
IN
6
T3
IN
20
T4
IN
21
R1
OUT
8
R2
OUT
5
R3
OUT
26
R4
OUT
22
R5
OUT
19
EN-
24
V+
13
G N D
1 0
V C C
1 1
V-
17
T1
O
U
T
2
T2
O
U
T
3
T3
O
U
T
1
T4
O
U
T
28
R1
IN
9
R2
IN
4
R3
IN
27
R4
IN
23
R5
IN
18
SH
D
N
25
IC
4
MA
X
2
1
1
VC
C
C
104
0.
1u
FL
2
2
22
FL
5
2
22
5
9
4
8 3 7
2
6
1
RS CN1
D-
S
U
B 9
TD
1
RI
1
DT
R1
CT
S1
RT
S1
RD1 DSR1
CD1
FL
6
2
22
FL
7
2
22
FL
3
2
22
C1
1
3
0.
1
u
RXD1 DSR1
-
CT
S
1
-
DCD1
-
RI
1
-
T
X
D
1
/CRB7
-
DT
R1
-/
CRB3
-
RT
S1
-/
CRB4
-
TX
D
1
DT
R1
-
RT
S1
-
RXD1
DSR1
-
CT
S1
-
DCD1
-
RI
1
-
RI
1
VC
C
J1
3X
1
IF
1
IC
PS1
.0
VCC
FL
8
2
22
FL
1
2
22
FL
21
2
2
2
FL
22
2
2
2
FL
19
2
2
2
VC
C
C
122
0.
1u
C
121
0.
1
u
C
1
23
0.
1
u
C1
+
12
C1
-
14
C2
+
15
C2
-
16
T1
IN
7
T2
IN
6
T3
IN
20
T4
IN
21
R1
OUT
8
R2
OUT
5
R3
OUT
26
R4
OUT
22
R5
OUT
19
EN-
24
V+
13
G N D
1 0
V C C
1 1
V-
17
T1
O
U
T
2
T2
O
U
T
3
T3
O
U
T
1
T4
O
U
T
28
R1
IN
9
R2
IN
4
R3
IN
27
R4
IN
23
R5
IN
18
SH
D
N
25
IC
7
MA
X
2
1
1
RXD2
T
X
D
2
/CRB0
-
DT
R2
-/
CRB2
-
RT
S2
-/
CRB1
-
TX
D
2
DT
R2
-
RT
S2
-
RXD2
C1
2
5
0.
1u
C
1
26
0.
1u
FL
23
2
2
2
FL
24
2
2
2
TD
2
RI
2
DT
R2
CT
S2
RT
S2
RD2 DSR2
CD2
5 9
4
8 3
7
2 6
1
RS CN2
D-
S
U
B 9
FL
20
2
2
2
FL
25
2
2
2
FL
18
2
2
2
RI
2
J2
3X
1
VC
C
DSR2
-
CT
S
2
-
DCD2
-
RI
2
-
DSR2
-
CT
S2
-
DCD2
-
RI
2
-
IF
2
IC
P
S
1
.0
VCC
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 13 –
P
R
IN
T
E
R CO
NNE
CT
O
R
4/
5
DP
[0
..
7
]
PE
S
SL
C
T
S
VCC
R1
3
5
4.
7
K
R
136
4.
7K
R1
3
2
4.
7
K
FL3
3
222
FL3
2
222
SL
CT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
PR
C
N
D-S
U
B 2
5
R1
3
3
4.
7
K
FL3
1
222
FL3
0
222
FL2
9
222
FL2
8
222
DP7
DP6
B
U
SY
S
A
C
KS
-
DP5
DP4
DP3
R
125
4.
7
K
FL2
7
222
FL2
6
222
FL1
7
222
PE
BU
SY
AC
K-
DB
7
DB
6
DB
5
DB
4
DB
3
SL
CT
IN-
DB
2
IN
IT
-
DB
1
ER
RO
R
-
DB
0
AU
TO
F
D
-
ST
RO
B
E
-
R1
1
2
4.
7
K
FL1
6
222
FL1
5
222
FL1
4
222
FL1
3
222
DP2
IN
IT
S
-
SL
IN
S-
E
RRS
-
AFD
S
-
DP1
DP0
R1
1
3
4.
7
K
R1
0
7
4.
7
K
R1
0
8
4.
7K
FL1
2
222
FL1
1
222
FL1
0
222
FL9
222
S
T
BS
-
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 14 –
S
E
TTI
N
G
S
W
IT
C
H
E
S
5/
5
VC
C
1A
1B
2A
3A
3B
J3
3
X
6
J4
3
X
6
R1
2
6
10K
R1
2
7
10K
R1
1
4
10
K
R1
1
5
10
K
T
X
D2
/CRB0
-
1A
1B
2A
2B
3A
3B
J1
7
3X
7
J1
6
3X
7
IR
Q
R
1
IR
Q
R
2
IR
Q
3
IR
Q
4
HI
O
R
-
3 4
IC
5
B
7
4
HC0
4
1
2
IC
5
A
7
4
HC0
4
IO
R
-
IO
W
-
C1
0
6
1
00p
C
108
1
00p
5
6
IC
5
C
7
4
HC0
4
HI
O
W
-
9 8
IC
5
D
7
4
HC0
4
C
107
100
p
C
114
100
P
IR
Q
1
0
IR
Q
9
1C
1D
2C
2D
3C
3D
J1
5
3X
7
J1
4
3X
7
J1
3
3X
7
RT
S2
-/
CR
B
1
-
DT
R
2
-/
CRB2
-
DT
R
1
-/
CRB3
-
1C
1D
2B
2C
2D
3C
3D
J5
3
X
6
J6
3
X
6
R1
2
8
10K
R1
2
9
10K
R1
1
6
10
K
R1
1
7
10
K
1E
1F
2E
2F
3E
3F
J7
3
X
6
J8
3
X
6
R1
3
0
10K
R1
3
1
10K
R1
1
8
10
K
R1
1
9
10
K
RT
S1
-/
CR
B
4
-
HCS
0
-/
CRB
6
-
1E
1F
1G
2E
2F
2G
3E
3F
3G
J1
2
3X
7
J1
1
3X
7
IR
Q
1
1
IR
Q
1
2
IR
Q
1
5
HR
E
S
-
13
12
IC
5
F
7
4
HC0
4
C
116
100
0p
11
10
IC
5
E
7
4
HC0
4
C1
1
5
1
000p
RESE
T
IR
Q
5
IR
Q
7
IR
Q
P
1A
2A
1B
2B
J1
0
2X
2
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 15 –
