Sharp ER-A440 (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
KEYBOARD
1
ST4
CN13
CN14
D11
D
D12
D
KEY I/F(MAIN PWB)
ST[0..9]
KR10
8-4B
2
3
4
5
6
1
/RES0
KR11
R199
47K
8-4B
8-8B
8-4B
ST0
ST1
ST2
ST3
CL1
CL2
CL3
CL4
GND
/RES0
ST0
ST1
ST2
KR11
P-ON
V0
SW1
CN12
CLERK CN
D22
D23
D24
(NU)
(NU)
1
2
3
4
5
D25
1SS353X4
2
3
4
5
6
7
8
9
10
11
ST0
ST1
ST2
ST3
ST4
ST5
ST6
ST7
ST8
U?
KEY74
ST5
KR10
CL1
CL2
CL3
CL4
D13
D
D14
D
D15
D
D16
D
D17
D
D18
D
D19
D
D20
D21
1SS353X11
K
R
1
K
R
2
K
R
3
K
R
4
K
R
5
K
R
6
K
R
7
K
R
1
0
2
3
4
5
6
7
8
9
KEY CN
K
R
0
1
CN15
KEY CN
R190~R198
47KX9
C234~C242
330PX9
MRS SW
ST4
ST5
ST6
ST7
ST3
D28
1SS353
ST6
KR10
OFF
ON
KR[0..7]
7
8
9
10
11
MODE SW CN
8-5C
8-8C
8-7A
8-8C
8-7A
9/10
Not used
8 –
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
+5V
RS232C
C222
0.1U
/RSS
/ERS
TXD
/CDS
RXD
/RI
/DRS
/CSS
2-1C
2-1C
2-2B
2-2B
2-2B
2-2B
2-2B
2-2B
C225
0.1U
C226
0.1U
C224
0.1U
0.1U
C223
0.1U
C1+
12
C1-
14
C2+
15
C2-
16
V+
13
V-
17
T1IN
7
T2IN
6
T3IN
20
T4IN
21
R1OUT
8
R2OUT
5
R3OUT
26
R4OUT
22
R5OUT
19
/EN
24
T1OUT
2
T2OUT
3
T3OUT
1
T4OUT
28
R1IN
9
R2IN
4
R3IN
27
R4IN
23
R5IN
18
/SHDN
25
1
0
0
V
C
C
C
1
1
1
IC21
MAX211
/RS
/ER
SD
RD
/CD
/CI
/DR
/CS
FL2
FL1
FL4
FL5
FL6
FL7
FL8
R200
R201
R202
R203
R204
100X5
FL3
CN16
RS CN
C117
C118
C119
1000PX5
C115
C116
FL
FB
FB
C
10/10
/CD
1
RD
2
SD
3
/ER
4
GND
5
/DR
6
/RS
7
/CS
8
9
9
D-SUB 9Pin
+5V
/CI
8
– 10
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
G[1'..10']
G2
G1
G4'
G3'
G2'
G1'
Q22
A1663
A1663
Q23
A1663
A1663
Q24
A1663
A1663
Q32
Q33
Q34
R177
12K
R178
12K
R179
12K
R187
220
R188
220
R189
220
G3
G4
G5
G6
G7
G8
G9'
G8'
G7'
G6'
G5'
Q17
A1663
A1663
Q18
A1663
A1663
Q19
A1663
A1663
Q20
A1663
A1663
Q21
A1663
A1663
Q27
Q28
Q29
Q30
Q31
R172
12K
R173
12K
R174
12K
R175
12K
R176
12K
R182
220
R183
220
R184
220
R185
220
R186
220
VCH
G[1..10]
G9
G10
G10'
Q15
A1663
A1663
Q16
A1663
A1663
Q26
R168
330K
C105
33p
R170
12K
R171
12K
R180
220
R181
220
Q25
KRC106SX10
DISPLAY DRIVER(CKDC8)
VDD
C219
33u/10V
OS
VDD
KR5
KR6
KR7
KR6
KR7
/POFF
D9
1SS353
BD8
BD9
BD10
R162
10K
1-1A
9-8B
9-8B
9-8B
9-8B
9-8B
/RESET
36
T0
53
T1
54
T2
55
T3
56
T4
57
T5
58
T6
59
T7
60
T8
61
T9
62
T10
63
SHEN
45
/RES1
46
VDD1
24
AVRF
34
AVDD
35
VSS0
9
AVSS
25
V
S
S
1
4
2
I
D
6
4
D
P
1
A
2
B
3
C
4
V
D
D
0
1
0
D
5
E
6
F
7
G
8
K
R
4
1
1
/
S
C
K
1
7
STH
16
HTS
15
LDRQ
43
ERC
44
KR10
12
KR11
13
ST0
18
ST1
19
ST2
20
ST3
21
ST4
22
ST5
23
ST6
47
ST7
48
ST8
49
ST9
50
KR8
14
KR9
26
KR0
27
K
R
1
2
8
K
R
2
2
9
K
R
3
3
0
B
U
Z
5
2
X
1
4
1
X
2
4
0
I
C
3
9
K
R
7
3
3
K
R
6
3
2
K
R
5
3
1
/
P
O
F
5
1
X
T
2
3
7
X
T
1
3
8
IC19
CKDC8
VDD
KR1
KR2
KR3
BD7
BD6
BD5
R169
1M
1
3
2
X3
4.19MHz
X2
32.768KHZ
C106
18p
9-8B
9-8B
9-8B
+5V
1
2
BZ1
BUZZER
BUZZER
D10
1SS353
R166
2.2K
R167
12K
CN10
FRONT CN
Q14
C2412K
G7'
PDS
G7'
PDS
JP2
NORMAL:G7'/FISCAL:PDS
CN11
POP CN(15P)
FRONT LED PWB
POP UP LED PWB
ERC
LDRQ
HTS
LDRQ
HTS
STH
ST[0..9]
3-8C
3-8C
2-5C
2-5C
9-8C
9-8C
9-8D
TO
TO
CN10-A
CN10-B
KR11
KR10
KR10
KR0
BD2
BD3
BD4
C103
330P
C104
330P
330P
R164 330
9-8B
R208
10K
R209
10K
10K
/RES0
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G2
G3
G4
G5
G6
G7
G8
G9
G10
/RESETS
DP
C99
330P
330P
C100
2200P
C220
10U/16V
9-8C
3-8B
2-5C
5-8A
/SHEN
SA
SB
SC
SB
SC
SD
SE
SF
SG
SE
SF
SG
KR4
/SCK
VDD
BD1
C101
0.1U
0.1U
C221
10U/16V
10U/16V
3-8C
9-8B
SA..DP
C102
330P
330P
1
0
7
1
1
6
1
2
2
5
DP
SG
SF
SE
E'
F'
G'
DP'
NU
IC20
KID65003P
C107
1000P
C108
C109
C110
Q35
KRC106S
1
3
4
1
4
4
3
1
5
2
1
6
6
1
SD
SC
SB
SA
A'
B'
C'
D'
A'..DP'
C111
C112
C113
C114
1000PX7
8/10
8 –
8
2. MAIN PWB LAYOUT
(1) SIDE A
8
– 11
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