Read Sharp ER-A850 (serv.man3) Service Manual online
ER-
A
8RS CIRCUIT
DIAG
RAM
SU
P
PER
I
/O
C
H
IP
1/
5
VC
C
C
109
0.
1
u
FB
1
RD3
5
C
C
120
0.
1
u
C1
2
4
0.
1
u
C1
1
0u/
1
0
V
O
S
S
D
[0
..7
]
R1
2
0
15
0
R1
0
3
2K
R
104
2K
R1
0
1
150
R1
0
2
15
0
R1
0
0
15
0
SD7
SD6
SD5
SD4
SD3
SD2
SD1
SD0
VCC
R
106
10
K
R1
1
0
15
0
A9
2
A8
3
A7
4
A6
5
A5
6
A4
7
A3
8
A2
9
A1
10
A0
11
AE
N
12
IO
L
13
IO
W
14
IO
R
15
RESE
T
1
IR
Q
R
2
58
IR
Q
R
1
40
IR
Q
F
D
72
IR
Q
P
39
DRQ
69
DAK
70
TC
71
SIN1
56
SOUT
1
/CRB7
57
CT
S1
51
DSR1
53
DT
R1
/CRB3
54
RT
S1
/CR
B
4
55
RI
1
50
DCD
1
52
SIN2
42
SOUT
2
/CRB0
41
CT
R2
48
DSR2
46
RI
2
49
DT
R2
/CRB2
44
RT
S2
/CR
B
1
43
DCD
2
47
DP7
19
DP6
20
DP5
21
DP4
22
DP3
23
DP2
24
DP1
25
DP0
26
D0
60
D1
61
D2
62
D3
63
D4
64
D5
66
D6
67
D7
68
DRVT
Y
P
84
IO
L
83
HDSEL
96
ST
EP
87
DI
R
91
DENS
EL
88
W
R
PRT
99
TR
K
0
97
IN
D
E
X
98
DR0
93
DR1
92
MT
R
0
95
MT
R
1
94
DSK
C
HG
/R
G
73
OS
C1
76
OS
C2
/C
L
K
75
WG
A
T
E
86
W
D
ATA
90
RDAT
A
78
FI
L
T
E
R
82
F
G
ND2
5
0
80
F
G
ND5
0
0
79
SE
T
CUR
85
SL
IN
37
IN
IT
36
AFD
35
STB
33
BUSY
32
PO
E
38
PE
30
SL
C
T
29
ERR
28
HSC0
/C
R
B
6
16
HS
C
1
17
GA
ME
18
G N D A
7 7
G N D B
1 0 0
G N D C
6 5
G N D D
5 9
G N D E
2 7
G N D F
8 9
V C C A
8 1
V C C B
7 4
V C C C
4 5
P
D
/CRD1
34
ACK
31
IC
6
M
51
05
SA9
SA8
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
VC
C
R1
2
4
4.
7
K
SA
[0
..9
]
AEN-
IR
Q
R
2
IR
Q
R
1
IR
Q
P
DRQ2
TC
RXD1
IR
Q
6
IO
W
-
IO
R
-
RESE
T
DACK2
-
HDSEL
STEP-
RPM
/L
C
WR
P
R
T
-
TR
K
0
-
INDEX-
DR0
-
DR1
-
MT
R
0
-
MT
R
1
-
DS
KCHG/
R
G
WG
ATE-
DI
R
C
118
0
.02
2u
C1
1
9
0.
033
u
R
122
68
0
R1
2
3
2.
2K
C1
1
7
1
000
p
R1
2
1
2
20K
X1
24
M
H
z
WD
AT
A
-
RDAT
A
-
R
105
6.
4
9
K
R
111
1M
SL
INS-
IN
IT
S-
AFD
S
-
T
X
D1
/CRB7
-
CT
S1
-
DSR1
-
DT
R1
-/
CR
B
3
-
RT
S1
-/
CRB4
-
RI
1
-
DC
D1
-
RXD2
T
X
D2
/CRB0
-
CT
S2
-
DSR2
-
DT
R2
-/
CR
B
2
-
RT
S2
-/
CRB1
-
RI
2
-
DC
D2
-
DP[
0
..
7
]
DP7
DP6
DP5
DP4
DP3
DP2
DP1
DP0
R1
0
9
10K
1
HC
S
0
-/
CR
B
6
-
HC
S
1
-
SL
C
T
S
PE
S
B
U
SYS
A
C
KS-
E
RRS-
STBS-
VC
C
J9
3X
1
C1
1
0
15
p
C1
1
1
15p
1
VC
C
J1
8
3X
1
2
3
2
3
VC
C
R1
3
7
10
K
R
138
10K
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
– 11 –
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