Sharp ER-A771 (serv.man3) Service Manual ▷ View online
ER-A771VS
CIRCUIT DIAGRAM
8 – 2
/DRAW0
/DRAW1
+20V
DRSNS
DRSNS
+20V
DOPS
4
+20V
1,9,13
VRES
14
/DR0
4
/DR1
4
CN9
5045-03A
DRAWER CN0
1
2
3
R16
10K
R18
2.2K
C18
1000pF
R17
47K
FB17
BFW7550R2
C13
0.1uF
F1
T400mA/250V
CN8
5045-03A
DRAWER CN1
1
2
3
C17
0.1uF
C15
0.1uF
C14
0.1uF
FB18
BFW7550R2
FB16
BFW7550R2
COM
COM
O1
O2
03
O4
GND
GND
GND
GND
VCC2
VCC1
I2
I1
I4
I3
IC3
TD62308F
9
16
2
7
15
10
4
51
3
12
11
14
6
3
8
1
17
18
FB15
BFW7550R2
C16
0.1uF
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
2/16
DRA
WER
ER-A771VS
CIRCUIT DIAGRAM
8 – 3
IC40 14PIN --- VCC
7PIN --- GND
32M FLASH ROM
A0
D8
A1
D9
A2
D10
A3
D11
A4
D12
A5
D13
A6
D14
A7
D15
A8
D0
A9
D1
A10
D2
A11
D3
A12
D4
A13
D5
A14
D6
A15
D7
A16
A17
A18
A19
A20
/RD
/HWR
/IPLON0
FVPON
4
NORDY
4
A[0..20]
1,4,7,8,9,11,12,16
/HWR
1,4,7,8,9,11,16
/FROS1
11
D[0..7]
1,4,9,16
D[8..15]
1,4,8,9,11,12,16
/RES
1,7,9,11,12
/IPLON0
1,4,9,11
/RD
1,4,7,8,9,11,16
A22
1,4,7,9,11
VCC
VCC
C21
100p
F
IC32E
74LV04
11
10
IC32C
74LV04
56
IC32B
74LV04
34
R19
1K
C20
0.1uF
IC32F
74LV04
13
12
+
C19
10uF/16V
IC32D
74LV04
98
IC4
LH28F320SKTD
32
28
27
26
25
24
23
22
20
52
33
35
38
40
44
46
49
51
34
36
39
41
45
47
50
9
43
37
21
42
48
19
18
17
13
12
11
10
8
7
6
5
4
14
2
54
55
56
16
53
31
1
15
3
29
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
DQ15
DQ0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
VCC
VCC
VCC
GND
GND
GND
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
BE0
BE1L
OE
WE
WP
RP
RY/BY
BYTE
NC
VPP
BE1H
NC
NC
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
3/16
FLASH R
O
M
ER-A771VS
CIRCUIT DIAGRAM
8 – 4
100pF
X6
NOT USE
NOT U
S
E
PLACE NEAR CPU!!!
MA-40
6
CPU
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A0
A10
A1
A11
A2
A12
A3
A13
A4
A14
A5
A15
A6
A7
A16
A8
A17
A9
A18
A10
A19
A11
A20
A12
A21
A13
A22
A14
A23
A15
A16
A17
A18
A19
A20
A21
A22
A23
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
/RESET
1,11,16
A[0..23]
1,3,7,8,9,11,12,16
/BACK
1
/BREQ
1
DOPS
2
/DR0
2
/DR1
2
SCKI
11
RXDI
11
TXDI
11
/AS
1,9,11
/RD
1,3,7,8,9,11,16
/RFSH
1,9
#
9,11,12
/IRQ0
11
/STOP
1
/IRQ1
1,12
MCRINT
11
NMI
11
/WAIT
11
D[0..15]
1,3,8,9,11,12,16
D[0..15]
1,3,8,9,11,12,16
IPLON0
11
FVPON
3
NORDY
3
/IPLON0
1,3,9,11
/HWR
1,3,7,8,9,11,16
/LWR
9
BANK
1
/SHEN1
1
TXD2
15
/CI2
15
/RTS2
15
/DCD2
15
/CTS2
15
/DSR2
15
/DTR2
15
/CLRES
1
/SRESET
7
RCVDT2
15
UASCK
11
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
R25
10K
R56
R46
C47
100pF
X8
R92
R80
R77
C74
C67
470pF
C34
C55
C62
R41
C279
100pF
C48
680pF
R61
R84
C31
R44
C42
R33
R88
R95
10K
R20
10K
C77
0.1uF
R51
C70
C26
C50
330pF
C76
330pF
C51
R38
47
R29
47
R57
R71
10K
R50
R93
10K
X2
4
R86
R78
C68
C36
8pF
C43
R21
10K
R85
10K
C56
C63
R43
C35
R79
R22
10K
R48
C44
R34
R89
R69
C71
C30
C27
+
C79
56uF/10V
S2
IPLON SW
12
C52
R35
47
R94
10K
R58
R54
10K
X8
R39
47
R70
10K
R81
C75
100pF
X8
R28
R66
C57
C64
C37
0.1uF
R45
C33
C23
R62
C39
8pF
R27
R52
C45
R36
R90
R23
10K
R73
R65
C72
C28
C53
C60
C78
0.1uF
X1
19.6608MHz
2
1
R59
R64
3.3K
R82
C80
100pF
R26
47
R230
47K
C40
R30
R53
R67
C81
100pF
C58
100pF
X8
C65
IC7
FS781
1
2
3
4
5
6
7
8
XIN
XOUT
S1
LF
VSS
FSOUT
S0
VDD
R47
C32
C24
R63
100
X 16
+
C38
10uF/10VOS
C278
100pF
R42
C46
R37
10K
X8
R91
R72
R76
C73
R24
10K
C29
100pF
X8
C54
C61
R60
C66
100pF
X8
R83
R40
C41
R31
R55
R87
R68
C59
C22
R49
C69
R75
10K
C25
IC6
HD641510810
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
RES
NMI
VSS
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
VSS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
VSS
A16
A17
A18
A19
A20
A21
A22
A23
VSS
P30 WAIT
P31 BACK
P32 BREQ
P33
P34
P35
P36
P37
VCC
P40
P41
P42
P43
FTI1 P44
P45
FTI2 P46
P47
VSS
P50
P51
P52
P53
P54
P55
P56
P57
P60
P61
P62
P63
P64
P65
P66
P67
VSS
AVSS
P70
P71
P72
P73
AVCC
VCC
IRQ0
IRQ1
SCK1 IRQ2
SCK2 IRQ3
RXD1
TXD1
RXD2
TXD2
VSS
EXTAL
XTAL
VSS
X
E
AS
RD
HWR
LWR
RFSH
VCC
MD0
MD1
MD2
STBY
R32
47
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
4/16
H8CPU
ER-A771VS
CIRCUIT DIAGRAM
8 – 5
LAN
CONT
NOT USE
FGND
SHORT
TPOUT+
TPOUT-
RX
-
RX
+
TX
-
TX+
TPIN+
TPIN-
LD15
LD14
LD7
LD6
LD13
LD5
LD12
LD4
LD11
LD3
LD10
LD2
LD9
LD1
LD8
LD0
IOCHRDY
RSTDRV
LD[0..7]
LA0
LA1
LA3
LA4
LA5
LA6
LA7
LA9
LA10
LA11
LA12
LA13
LA14
LA15
LA16
LA17
LA18
LA19
LA[0..19]
LA8
LA2
RSTDRV
7
IOCHRDY
6
/MRD
6,8
/MWE
6,8
/CSLAN
6
INT0
7
LA[0..19]
6,8
LD[0..7]
6,8
VCC
VCC
VCC
VCC
VCC
VCC
VCC
CN10
RJ45
1
2
3
4
5
6
7
8
10
9
C89
10uF
C85
0.01uF
2
1
R97
1k
C84
0.01uF
2
1
R104
10k
D2
LED
AK
LOW
PASS
FILTER
..
..
.
.
LOW
PASS
FILTER
..
.
.
1:1
1:1
T1
78Z034C
1
3
2
6
8
7
10
9
11
15
14
16
D3
LED
AK
R105
27K
R107
10k
R102
270
R98
1k
C86
0.01uF
2
1
C82
18pF
2
1
BR2
10K*4
18
27
36
45
R225
0
D4
LED
AK
R100
1M
R103
270
R101
200
X2
20MHz
MA406
R99
10K
C87
0.01uF
2
1
R106
10k
R108
10k
R96
1k
BR1
10K*4
18
27
36
45
C83
18pF
2
1
IC8
RTL8019AS
81
50
80
79
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
37
38
39
40
41
42
43
44
45
46
47
48
49
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
BD3(IOS0)
X1
BD4(IRQS2)
BD5(IRQS1)(EESK)
INT3(IRQ5)
INT2(IRQ4)
INT1(IRQ3)
INT0(IRQ2/9)
SA0
VDD
SA1
SA2
SA3
SA4
SA5
SA6
SA7
GND
SA8
SA9
VDD
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
GND
IORB
IOWB
SMEMRB
SMEMWB
RSTDRV
AEN
IOCHRDY
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
GND
TPOUT+
TPOUT-
VDD
TX-
TX+
X2
GND
CD-
CD+
RX-
RX+
VDD
TPIN-
TPIN+
LEDBNC
LED0(LED COL)(LED LINK)
LED1(LED RX)(LED CRS)
LED2(LED TX)
AUI
JP
BA21(PNP)
BA20(BS0)
BA19(BS1)
BA18(BS2)
BA19(BS1)
BA18(BS2)
VDD
BA17(BS3)
BA16(BS4)
BA16(BS4)
BA15
BA14(PL0)
BCSB
EECS
EECS
BD7(PL1)(EEDO)
BD6(IRQS0)(EEDI)
BD2(IOS1)
GND
BD1(IOS2)
BD0(IOS3)
GND
SD15
SD14
VDD
SD13
SD12
SD11
SD10
SD9
SD8
IOCS16B(SLOT16)
INT7(IRQ15)
INT6(IRQ12)
INT5(IRQ11)
INT4(IRQ10)
C88
100pF
2
1
R5
0
C90
0.1uF
2
1
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
5/16
LAN_CONT
.SCH
Click on the first or last page to see other ER-A771 (serv.man3) service manuals if exist.