Sharp ER-A770 (serv.man8) 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
PSRAM
IC34 20PIN - - - VCC
10PIN - - - GND
D[0..7]
D[8..15]
/M3SWP
/RD
/RD
D0
D1
D2
D3
D4
D5
D6
D7
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D9
D10
D11
D12
D13
D14
D15
/RD
VCC
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
3
A15
31
A16
2
CE
22
OE/RFSH
24
R/W
29
A18
1
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
VCC
32
GND
16
A17
30
IC33
TC51V8512AFT
C184
0.1uF
0.1uF
C31
OS 10uF/10V
OS 10uF/10V
B1
18
B2
17
B5
14
B6
13
B7
12
B8
11
DIR
1
G
19
A8
9
A7
8
A6
7
A5
6
A4
5
A3
4
A2
3
A1
2
B4
15
B3
16
IC38
74AHCT245NS
ODD SIDE
/PSREF
/AS
VMEM
/PCE1_O
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
1
2
3
1
4
7
IC23A
74LVX32
RASPN1
/PSRFO
VMEM
/RESET
from MPCA
VMEM
VMEM
/RESET
VMEM
12
13
11
1
4
4
7
IC25D
74LVX00
1
2
3
1
4
4
7
IC22A
74LVX32
1
2
3
1
4
4
7
IC26A
74LVX08
4
5
6
1
4
7
IC24B
74LVX00
RASPN1E
PCE22O
/RESET
VMEM
VMEM
/RESET
from MPCA
VMEM
VMEM
VMEM
VMEM
12
13
11
1
4
4
7
IC22D
74LVX32
4
5
6
1
4
7
IC26B
74LVX08
9
10
8
1
4
4
7
IC26C
74LVX08
74LVX08
1
2
3
1
4
7
IC25A
74LVX00
9
10
8
1
4
4
7
IC24C
74LVX00
EVEN SIDE
/OWR
/PCE22_O
A[1..19]
VMEM
/AS
/AS
VMEM
/PCE1_E
A17
A18
A19
A18
A19
/PCE1_O
/PSREF
/OWR
/PSREF
/OWR
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
12
13
11
1
4
7
IC23D
74LVX32
4
5
6
1
4
4
7
IC23B
74LVX32
D[8..15]
D8
D9
D10
D11
D12
D13
D14
D15
D9
D10
D11
D12
D13
D14
D15
VCKDC
C265
0.1uF
C36
10uF/16V
10uF/16V
R4
0
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
3
A15
31
A16
2
CE
22
OE/RFSH
24
R/W
29
A18
1
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
VCC
32
GND
16
A17
30
IC34
TC51V8512AFT
VMEM
1
2
3
1
4
4
7
IC24A
74LVX00
C139
0.1uF
0.1uF
C140
0.1uF
0.1uF
R3
0
C187
0.1uF
0.1uF
C32
OS 10uF/10V
OS 10uF/10V
/PCE21_E
/PCE22_E
/PCE21_O
/HWR
/AS
/AS
/AS
VMEM
VMEM
VMEM
A12
A13
A14
A15
A16
A17
A18
A19
A13
A14
A15
A16
A17
A18
A19
/PSREF
/PCE1_E
/HWR
VMEM
VMEM
9
10
8
1
4
4
7
IC22C
74LVX32
9
10
8
1
4
4
7
IC23C
74LVX32
4
5
6
1
4
4
7
IC22B
74LVX32
C136
0.1uF
0.1uF
C137
0.1uF
0.1uF
C138
0.1uF
0.1uF
PCE21O
PCE22E
PCE21E
/RESET
/RESET
/RESET
VMEM
VMEM
VMEM
12
13
11
1
4
4
7
IC26D
74LVX08
74LVX08
9
10
8
1
4
4
7
IC25C
74LVX00
12
13
11
1
4
4
7
IC24D
74LVX00
4
5
6
1
4
4
7
IC25B
74LVX00
IC22,IC23,IC24,IC25,IC26 VCC --- GND
4/14
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
MPCA8
X 3
STH2
/SCK2
HTS2
HTS2
for MCR
for MCR
C46
330pF
C124
C121
/RES
RDD1
CLS1
RCP1
RDD2
CLS2
RCP2
VCC
VCC
RF
1
JF
2
PCUT
3
FCUT
4
VF
5
STAMP
6
VIO
7
VMEM
8
SWAP
9
RES
10
FROS1
11
FROML
12
INT0
13
INT1
14
HTS1
15
SCK1
16
STH1
17
MCRINT
18
VWAIT
19
VCC
20
VSS
21
MCRINT
22
VRESC
23
SLTMG
24
SLRST
25
AS
26
RD
27
WR
28
PHAI
29
RASPN1E
31
RASPN12
32
VSS
33
RASPN2
34
RASPN2E
35
VGAL
36
SDT1
37
D0
38
D1
39
D2
40
D3
41
VSS
42
D4
43
D5
44
D6
45
D7
46
RESET
48
SSPRQ
47
INT2
49
INT3
50
RXDI
51
TXDI
52
SCK1
53
IRQ0
54
A0
55
A1
56
A2
57
A3
58
A4
59
A5
60
EXINT0
120
EXINT1
119
EXINT2
118
EXINT3
117
WRO
116
RDO
115
RA15
114
RA16
113
VSS
112
RA17
111
RA18
110
EXWAIT
109
WAIT
108
MCR2
107
IPLON
106
DAX2
105
PHAI
104
RCI
103
IRRX
102
VSS
101
VCC
100
UATX
99
UARX
98
UASCK
97
IRTX
96
RCO
95
RCVRDY2
94
PTMG
83
TRGI
82
A23
81
LCDC
80
A22
79
A21
78
A20
77
A19
76
A18
75
A17
74
A16
73
A15
72
A14
71
A13
70
A12
69
A11
68
A10
67
A9
66
A8
65
A7
64
A6
63
VCC
62
VSS
61
PRST
84
RCVRDY1
93
TPRDY
92
TPTRDY
91
TPRRDY
90
TEST
89
MD0
88
MD1
87
IPLON
86
INT4
85
RASPN1
30
RASP
160
RCP2
159
LCDWT
158
CLS2
157
RDD2
156
TEST2
155
TEST1
154
TEST0
153
STH2
152
SCK2
151
HTS2
150
RCP1
149
SLMTS
148
SLMTD
147
CLS1
146
RAS3
145
RDD1
144
VSS
143
VCC
142
ASKRX
141
SYNC
140
DOT8
139
DOT9
138
RJMTD
137
RJMTS
136
DOT5
135
DOT6
134
D0T7
133
VSS
132
DOT1
131
DOT2
130
DOT3
129
DOT4
128
TPCKI
127
TPRXD
126
TPTXD
125
RAS2
124
ROS2
123
ROS1
122
OPTCS
121
IC17
MPCA8
X3
/POFF
/KRQ
/VMEM
/FROS1
HTS1
/SCK1
STH1
STH1
VCC
for CKDC CN
C128
330pF
C130
C123
R107
10K
X2
R194
NMI
/RESET
TXDI
SCKI
SCKI
RXDI
D[8..15]
RASPN1
RASPN1E
RASPN1E
/RASPN12
RASPN2
RASPN2E
RASPN2E
D8
D9
D10
D11
D9
D10
D11
D12
D13
D14
D15
D13
D14
D15
D[8..15]
VCC
C200
C127
100pF
X2
C131
C126
R116
10K
X5
R117
R118
R119
R120
C135
100pF
X5
C141
C142
C143
C144
/AS
/RD
/RD
#
VRESC
MCRINT
/VWAIT
/HWR
/OPTCS
/EXINT0
/EXINT1
/EXINT0
/EXINT1
/TRQ1
/TRQ2
/TRQ2
/WRO
/RDO
/RDO
/EXWAIT
/WAIT
VCC
VCC
R90
R87
R85
R80
R76
10K
X5
C115
100pF
R81
10K
C117
C116
C114
C112
C107
100pF
X5
X2
7.3728MHz
RCRSP5019BCZZ
/IPLON0
IPLON0
/SHEN2
PHAI
UASCK
TO CPU
R72
680
R75
1M
1M
A0
A1
A2
A3
A4
A5
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
/IRQ0
VCC
C118
0.1uF
0.1uF
C12
10uF/16V
10uF/16V
C109
0.1uF
0.1uF
A[0..23]
A[0..23]
5/14
8
7
6
5
4
3
2
1
A
B
C
D
1
2
3
4
5
6
7
8
D
C
B
A
MCR I/F
VCC
MCR CN
RCP2#
RDD2#
CLS2#
RCP1#
RDD1#
CLS1#
VCC
1
2
3
4
5
6
7
8
CN11
5045-0810
FB40
BLM31
X6
FB37
FB35
FB14
FB13
FB12
R111
4.7KX6
R104
R95
R99
R108
R114
R110
10K
R103
10K
R94
10K
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
10uF/16V
10uF/16V
C82
0.1uF
0.1uF
C77
NU
RES_USART
CLK_USART
/RDH
/WRH
/WRH
AH1
AH0
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
CI0
22
RTS0
23
CS0
24
CD1
25
BRK1
26
TRNEMP1
27
RCVRDY1
28
TRNRDY1
29
CTS1
30
RCVDT1
31
CI1
32
RTS1
33
CS1
34
CD2
35
TRNEMP2
36
RCVRDY2
37
TRNRDY2
38
CTS2
39
RCVDT2
40
CI2
41
CS2
42
CD3
43
BRK3
44
TRNEMP3
45
RCVRDY3
46
TRNRDY3
47
CTS3
48
RCVDT3
49
CI3
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
US1CH
69
PX
70
POF
71
RSRQ
72
TRV
73
RXDATA0
74
TXE
75
TRRQ
76
TRQ1
77
TRQ2
78
A0
79
A1
80
A2
81
A3
82
A4
83
A5
84
OPTCS
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
100
GND
101
RES
102
TRNCLK
103
RCVCLK
104
DBTST
105
UTST
106
CSA
107
TRNDTA
108
DTRA
109
RTSA
110
RCVDTA
111
CTSA
112
DSRA
113
TRNRDYA
114
RCVRDYA
115
TRNEMPA
116
SYCBKA
117
GND
118
CSB
119
TRNDTB
120
DTRB
121
RTSB
122
RCVDTB
123
CTSB
124
DSRB
125
TRNRDYB
126
RCVRDYB
127
TRNEMPB
128
SYCBKB
129
GND
130
CSC
131
TRNDTC
132
DTRC
133
RTSC
134
RCVDTC
135
CTSC
136
DSRC
137
TRNRDYC
138
RCVRDYC
139
TRNEMPC
140
SYCBKC
141
VCC
142
GND
143
CSD
144
TRNDTD
145
DTRD
146
RTSD
147
RCVDTD
148
CTSD
149
DSRD
150
TRNRDYD
151
RCVRDYD
152
TRNEMPD
153
SYCBKD
154
WIN
155
RIN
156
RSLCT0
157
RSLCT1
158
RST
159
MCLK
160
IC10
OPC2
PLZ BE SHORT PATTERN!
/DCD1
/CTS1
RCVDT1
/CI1
/RTS1
/RTS1
BRK1
TRNEMP1
RCVRDY1
TRNRDY1
TRNEMP1
RCVRDY1
TRNRDY1
RCVDT1
VCC
R68
10K
/SINT
/SRCS
D[8..15]
/CS1
VCC
C103
330pF
R59
10K
10K
X3
C95
D8
D9
D10
D11
D9
D10
D11
D12
D13
D14
D13
D14
/CS1
RCVDT1
TRNRDY1
RCVRDY1
TRNEMP1
BRK1
/SRCS
TXD1
/DTR1
/DSR1
VCC
R63
R66
R51
R52
R53
R54
R55
R57
R58
R60
10K
X10
DB[0..7]
/WRH
/RDH
/RDH
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
/WRH
/RDH
/RDH
C98
C78
C80
C83
C86
C88
C89
C92
C94
330pF X10
C97
SRNRESET
/OPTCS
/RDO
/WRO
/RES
A0
A1
A1
A2
A3
A5
A4
A4
/SRESET
D15
/SRESET
4
5
6
IC6B
74LV08
1
2
IC44A
74HC04
#
AH0
AH1
AH1
/POFF
/IRQ1
/TRQ2
/TRQ1
/TRQ1
A[0..5]
CLK_USART
AH0
AH1
AH1
VCC
FL2
RCORF6702BHZZ
RCORF6702BHZZ
R65
10K
X2
R67
C96
100pF
X2
C101
7PIN - - - GND
IC44 14PIN - - - VCC
7PIN - - - GND
/SRNRESET
/RES
IC6 14PIN - - - VCC
7/14
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