Sharp ER-A470 (serv.man2) 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
<DOT PULSE ADJ.>
+5
V
+2
4
V
+2
4
V
R1
2
130
K
F
D6
1S
S
133
1
2
ZD
3
E
102
+5
V
R1
5
3.
3K
PE
TP
R1
4
62
K
+2
4
V
3
2
1
8
4
A
GL
3
9
3
IC
2
VR
1
200K
R1
3
2K
ZD
4
R
D
4.
3E
L1
Q4
C3
1
9
8
TRG
R1
6
2K
R8
6
3.
3K
C1
4
100
00P
<P-OFF CIRCUIT>
+2
4
V
R1
9
8.
2K
G
R2
2
2.
7K
+5
V
R2
3
56
K
D8
1S
S
1
33
R2
4
2.
7K
/POFF
C1
6
100
0P
R2
0
15
K
G
R2
1
9.
1K
G
C1
5
1u
50
V
5
6
7
8
4
B
GL
3
9
3
IC
2
ZD
5
MTZ5
.1
A
(2
-7
D
)
(2-
2
D
)
(7
-7
A)
P
-O
FF,
D
o
t pu
ls
e
4/
7
– 44 –
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
/WR
A0
~
A
17
/RD
+5V
VPP
1
A16
2
A15
3
A12
4
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A0
12
D0
13
D1
14
D2
15
GND
16
VCC
32
A18/PGM
31
A17
30
A14
29
A13
28
A8
27
A9
26
A11
25
OE
24
A10
23
CE
22
D7
21
D6
20
D5
19
D4
18
D3
17
IC4
ROM
A14
1
A12
2
A7
3
A6
4
A5
5
A4
6
A3
7
A2
8
A1
9
A0
10
D0
11
D1
12
D2
13
GND
14
VCC
28
/WE
27
A13
26
A8
25
A9
24
A11
23
OE
22
A10
21
CS
20
D7
19
D6
18
D5
17
D4
16
D3
15
IC5
RAM(32K)
VRAM
C17
0.1u
C18
10u
50V
+5V
C19
0.1u
C20
10
u5
0V
VRAM
(R90)
0
9
10
8
C
74HC00
IC3
RAS1
VRAM
14
4
5
6
B
74HC00
IC3
1
2
3
A
74HC00
IC3
/ROS1
D0
~
D
7
/RESETS
C21
1000P
R25
10K
C22
1000P
RAS2
7
12
13
11
D
74HC00
IC3
C24
330P
/RAS2
(R91)
0
/RESET
3
4
5
6
B
IC12
74HC10
9
10
11
8
C
IC12
74HC10
VRAM
MA15
/RESET
1
2
13
12
A
IC12
74HC10
14
7
/R
O
S
2
/RAS3
(CN11 12P)
/(
R
O
S
2
.R
A
S
3
)
(1-
2C) (2-7
C)
(1
-2
C
) (
2
-7
C
)
(1
-6
B
)
(1
-7
C
)
(2
-2
C
)
(2
-2
C
)
(2
-2
C
)
(2-
2C)
(1
-6
C
) (2
-8
B
) (5
-7
A
)
(7
-7
C
)
(5
-4
A
)
5/
7
Mem
o
ry
330P
– 45 –
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
P
O
W
E
R
UN
IT
(
U
,A
)
1
2
CN1
PS C
N
F1
AC
1
AC
2
C1
0.
033u
BD
1
CP
3
0
1
MO
D
E
S
W
V0
C2
4700u
63
V
R1
12
K
R9
5
P-
O
N
R2
33
K
R5
3.
3K
1W
Q1
B8
8
1
R4
33K
HE
A
T
S
IN
K
5
3
2
1
4
IC
1
S
T
R
20
24
R7
47
K
L1
180uH
C4
2200u
50
V
+2
4
V
C3
10u
50V
R3 2.
7K
R6
10
K
Q1
4
C
1027
P
O
W
E
R UNI
T
(
V
)
ZD
1
MTZ6
.2
B
FB
1
FB
2
7
4
5
8
2
10
6
1
3
9
T1
DC
-D
C C
V
T
R8
5.
6K
D1
1N
4
002
+2
4
V
C5
100u
50
V
Q2
C4
1
5
3
Q3
C3
1
9
3
C6
R9
220
R1
0
330
C8
10u
10
V
C9
3.
3u
50V
C7
330
0P
D2
1S
S
4
1B
C1
0
47
U
50
V
C1
3
33
0u
16
V
C1
1
46
0u
16
V
D3
P
S
10
2R
D4
1N
4
002
D5
1N
4002
C1
2
100u
16
V
ZD
2
M
TZ5
.6
A
BAT
T
E
R
Y
3/
17
0m
A
H
R1
1
330
VF
1
VF
2
-3
2V
+5
V
VR
AM
VC
KD
C
VB
T
6/
7
P
o
we
r s
upp
ly
CO
RE
CO
RE
CO
RE
CO
RE
N
o
t m
ount
ed
– 46 –
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
+5V
+24V
01
1
02
2
03
3
04
4
05
5
06
6
07
7
08
8
09
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
A
OPTCN
CN7
/RD0
/WR0
A[0..23]
A23
A22
A21
1
2
CN1
PSCN
AC1
AC2
GND
GND
D3
D4
D2
D5
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
OPTION MEM CN
CN11
D1
D6
D0
D7
A0
/ROS2
/RAS2
A1
A10
A2
/RD
A3
A11
A4
VBT
GND
1
2
B/T CN
CN8
A20
A19
A18
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
/RESET
/OPTCS
A6
A5
A4
A1
A0
GND
+5V
STH
HTS
/SCK
/KRQ
/SHEN
1
2
3
4
5
6
7
DI
SPL
AY CN9
A9
A5
A8
A6
A13
A7
A14
/WR
A17
A12
A15
A16
+5V
VRAM
+5V
ASK
IRDA
GND
1
2
3
4
5
CN15
/STOP
1
2
3
4
5
6
7
8
9
10
11
12
DISPLAY CN10
/EXWAIT
/BREQ
/B
A
C
K
/TRQ2
/TRQ1
/EXINT1
/EXINT0
NU
VRAM
01
35
02
36
03
37
04
38
05
39
06
40
07
41
08
42
09
43
10
44
11
45
12
46
13
47
14
48
15
49
16
50
17
51
18
52
19
53
20
54
21
55
22
56
23
57
24
58
25
59
26
60
27
61
28
62
29
63
30
64
31
65
32
66
33
67
34
68
B
OPTCN
CN7
/IRQ1
/R
F
S
H
/IPLON
D[0..7]
/POFF
D0
D1
D2
D3
D4
D5
D6
D7
C191
1000PF
/POFF
GND
-32V
VF1
VF2
GND
P-ON
V0
/RESET
GND
VRAM
IRTX
A3
A2
/RES
/AS
NU
(2-
2B)
(2
-2
B
)
(1
-6
B
)
(5-
4A)
(2
-2
C
)
(1-
2B)
(1
-6
B
)
(1
-6
B
)
(2
-2
B
)
(2
-2
B
)
(2
-2
B
)
(2
-2
B
)
(1
-2
C
)
(1
-2
C
)
(2-
2A)
(1
-7
C
)
(2
-7
C
) (
4
-6
A
)
(2
-7
D)
(1
-2
C
) (
2
-7
C
)
7/
7
Ma
in
P
W
B
co
n
n
ect
o
r
– 47 –
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