Sharp ER-A771 (serv.man3) Service Manual ▷ View online
ER-A771VS
CIRCUIT DIAGRAM
8 – 14
VRESC
11
VRES
2
VO
13
VCC
L4960H
IC36A2
L4960H
1
6
3
4
7
2
5
R226A2
4.3K
C239A2
2200p
F
R229A2
15K
C235A2
33000pF
L1A1
150uH
D1A2
RB160L-60
A
K
ZD5A2
PTZ5.6B
A
K
+
C40A2
10uF/50V
+
C47A2
1500uF/10V
+
C47A3
120uF/10V "OS"
R86A1
5.6K
R89A1
1K
Q1A1
KTA1664
B
E
C
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
14/16
VCC
ER-A771VS
CIRCUIT DIAGRAM
8 – 15
FOR DSUB
9PIN
CHANNEL1
CHANNEL8
FOR DSUB
9PIN
NOT USED
NOT USED
CI1
ER1
CS1
SD1
RS1
RD1
DR1
CD1
CI2
ER2
CS2
SD2
RS2
RD2
DR2
CD2
GND
GND
TXD2
4
/DTR2
4
/RTS2
4
RCVDT2
4
/DSR2
4
/CTS2
4
/DCD2
4
/CI2
4
RCVDT1
12
/CI1
12
/CTS1
12
/RTS1
12
/DSR1
12
/DTR1
12
TXD1
12
/DCD1
12
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
C262
FB30
PF2
miniSMD020-2
2
1
FB31
FB32
FB33
FB34
R216
100
FB35
R218
0
C261
FB39
FB43
CN14
MLX 53014-091
0
1
2
3
4
5
6
7
8
9
CN13
MLX 53014-091
0
1
2
3
4
5
6
7
8
9
C256
0.1uF
FB40
C263
FB36
CIM31J601NE
X 8
FB41
C264
IC119
HIN211
12
14
15
16
7
6
20
21
8
5
26
22
19
24
13
17
2
3
1
28
9
4
27
23
18
25
11
10
C1+
C1-
C2+
C2-
T1IN
T2IN
T3IN
T4IN
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
/EN
V+
V-
T1OUT
T2OUT
T3OUT
T4OUT
R1IN
R2IN
R3IN
R4IN
R5IN
/SHDN
VCC
10
FB37
R210
10K
C246
0.1uF
SW4
SSS312
2
1
3
C248
0.1uF
R201
10K
R213
100
R202
10K
R214
100
R203
10K
C249
0.1uF
C245
0.1uF
C265
100pF
X 5
C244
0.1uF
+
C247
10uF/16V
R211
10K
C255
0.1uF
FB42
R205
100
R204
100
R206
100
R207
100
C260
0.1uF
C250
C251
FB38
C252
C257
0.1uF
C253
+
C258
10uF/16V
R215
100
C254
100pF
X5
R217
100
R208
100
SW3
SSS312
2
1
3
IC118
HIN211
12
14
15
16
7
6
20
21
8
5
26
22
19
24
13
17
2
3
1
28
9
4
27
23
18
25
11
10
C1+
C1-
C2+
C2-
T1IN
T2IN
T3IN
T4IN
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
/EN
V+
V-
T1OUT
T2OUT
T3OUT
T4OUT
R1IN
R2IN
R3IN
R4IN
R5IN
/SHDN
VCC
10
C259
0.1uF
PF1
miniSMD020-2
2
1
R209
0
FB28
CIM31J601NE
X 8
R212
10K
FB29
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
15/16
RS232
ER-A771VS
CIRCUIT DIAGRAM
8 – 16
ODD
SIDE
EVEN
SIDE
IC35 20PIN --- VCC
10PIN - - - GND
ODD
SIDE
EVEN
SIDE
IC40 14PIN -
-- VCKDC
7PIN ---
GND
IC36,IC39,IC40 V
CKDC --- GND
4M SR
AM
4M SR
AM
4M SR
AM
4M SR
AM
A1
D0
A1
A2
D1
A2
A3
D2
A3
A4
D3
A4
A5
D4
A5
A6
D5
A6
A7
D6
A7
A8
D7
A8
A9
A9
VCKDC
A10
A10
A11
A11
A12
A12
A13
VCKDC
A13
/PCE1_OL
A14
A14
A15
A15
A16
A16
A17
A17
A18
A18
A19
A19
/PCE1_OL
/PCE1_OH
/RD
/RD
VCKDC
/OWR
/OWR
/PCE1_OH
VCKDC
/PCE1_EL
A1
D8
A1
A2
D9
A2
A3
D10
A3
A4
D11
A4
VCKDC
A5
D12
A5
A6
D13
A6
A7
D14
A7
A8
D15
A8
/PCE1_EH
A9
A9
A10
A10
A11
A11
A12
A12
A13
VCKDC
A13
A14
A14
A15
A15
A16
A16
A17
A17
A18
A18
A19
A19
/PCE1_EL
/PCE1_EH
/RD
/RD
/HWR
/HWR
VCKDC
D12
D1
D3
D9
D1
D3
D11
D9
D8
D15
D5
D13
D10
D6
D0
D11
D14
D6
D14
D5
/RD
D2
D4
D12
D10
D2
D4
D7
D15
D13
D7
D0
D8
VCKDC
VCC
RASPN1
11
RASPN1E
11
/OWR
1,9
D[0..7]
1,3,4,9
A[1..19]
1,3,4,7,8,9,11,12
D[8..15]
1,3,4,8,9,11,12
VCKDC
1
D[8..15]
1,3,4,8,9,11,12
/HWR
1,3,4,7,8,9,11
/RESET
1,4,11
A20
1,3,4,7,9,11
/RD
1,3,4,7,8,9,11
/PCE22E
1
PCE21E
9
/PCE21E
1
/RD
1,3,4,7,8,9,11
/M3SWP
9
PCE22O
9
PCE21O
9
/PCE22O
1
/PCE21O
1
PCE22E
9
VCC
VCC
IC40C
74LV00
9
10
8
+
C269
10uF/16V
IC40A
74LV00
1
2
3
IC32A
74LV04
12
IC36A
74LV10
1
2
13
12
IC39B
74LV10
3
4
5
6
C270
0.1uF
C266
0.1uF
C271
0.1uF
IC33
HY628400ALLT2-70
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
22
24
29
1
13
14
15
17
18
19
20
21
32
16
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CE
RD
R/W
A18
D0
D1
D2
D3
D4
D5
D6
D7
VCC
GND
A17
IC37
HY628400ALLT2-70
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
22
24
29
1
13
14
15
17
18
19
20
21
32
16
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CE
RD
R/W
A18
D0
D1
D2
D3
D4
D5
D6
D7
VCC
GND
A17
IC36C
74LV10
9
10
11
8
IC40D
74LV00
12
13
11
C267
0.1uF
IC34
HY628400ALLT2-70
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
22
24
29
1
13
14
15
17
18
19
20
21
32
16
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CE
RD
R/W
A18
D0
D1
D2
D3
D4
D5
D6
D7
VCC
GND
A17
IC35
74LV245
18
17
16
15
14
13
12
11
1
19
9
8
7
6
5
4
3
2
B1
B2
B3
B4
B5
B6
B7
B8
DIR
G
A8
A7
A6
A5
A4
A3
A2
A1
IC36B
74LV10
3
4
5
6
IC39C
74LV10
9
10
11
8
IC39A
74LV10
1
2
13
12
C277
0.1uF
IC40B
74LV00
4
5
6
+
C273
10uF/10V "OS"
C275
0.1uF
C272
0.1uF
+
C268
10uF/10V "OS"
IC38
HY628400ALLT2-70
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
22
24
29
1
13
14
15
17
18
19
20
21
32
16
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CE
RD
R/W
A18
D0
D1
D2
D3
D4
D5
D6
D7
VCC
GND
A17
R219
10K
C274
0.1uF
C276
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
16/16
SRAM
ER-A771VS
CIRCUIT DIAGRAM
8 – 17
IC2,IC4 ---
14PIN V
C
C
7PIN GN
D
IC3,IC6
---
16PIN VCC
8PIN G
N
D
IC2,IC4 VCC-
--GND
IC3,IC6 VCC
---GND
USA IS NOT USED
+
1
2
/S9
/S2
/S3
/S4
/S5
/X7
/S6
/S7
/S8
/S8
/S9
/X6
/S7
/X5
/S6
/X4
/S5
/X3
/S4
/X2
/S3
/X1
/S2
/X0
/S[0..12]
ST3
ST1
ST0
ST2
/S7
/C1
/KS10
/KS8
/KS0
/KS2
/C4
/C2
/S10
/S5
/S0
/S3
/CFSR
/S2
/C6
/S8
/KS11
/S6
/KS3
/S4
/KS12
/S8
/S11
/KS9
/S3
/KS6
/KS1
/C3
/C0
/KS4
/KS7
/S1
/S12
/S9
/S6
/C5
/S5
/S2
/S7
/S4
/KS5
/KR3A
/KR0A
/KR1A
/KR0C
/KR2A
/KR3C
/KR3B
/KR1B
/KR0A
/KR0B
/KR1C
/KR1C
/KR3B
/KR3C
/KR0C
/KR1A
/KR2A
/KR0A
/KR3C
/KR2C
/KR1B
/KR2B
/KR1B
/KR1C
/KR2B
/KR0C
/KR2A
/KR2C
/KR3A
/KR2C
/KR3A
/KR1A
/KR3B
/KR0B
/KR2B
/KR0B
/CFSR
/S0
/S1
/S10
/S11
/S12
ST0
1
ST1
1
ST2
1
ST3
1
/CLRES
1
/CLCOM
1
/CLSIN
1
/CLSOUT
1
/KR0
1
/KR1
1
/KR3
1
/KR2
1
/CFSR
1
KEX1
1
KEX0
1
BUZZ
1
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
D7
CN4
MLX 53048-0
810
CLERK KEY CN
1
2
3
4
5
6
7
8
R22
47K
X3
D11
R17
R23
FB20
R5
47K
X3
D13
R7
R24
FB21
Q1
DTC114YK
23
1
IC6B
74LS12
5
5
6
4
D22
1SS353
R9
R25
47K
X3
D4
R10
R26
D6
R12
IC3A
74LS12
5
2
3
1
R27
R28
4.7K
R11
D2
FB10
BLM31
D8
R4
47K
X1
2
FB18
BLM3
1
X
4
FB11
BLM31
D10
R6
FB19
IC6A
74LS12
5
2
3
1
D12
R8
IC5
74HC153
6
5
4
3
10
11
12
13
14
2
1
15
7
9
1C0
1C1
1C2
1C3
2C0
2C1
2C2
2C3
A
B
1G
2G
1Y
2Y
IC3D
74LS12
5
12
11
13
D14
R20
CN6
CON7
(CLERK CN)
1
2
3
4
5
6
7
C22
1000
pF
IC3C
74LS12
5
9
8
10
D18
R14
IC2
74HC138
1
2
3
6
4
5
15
14
13
12
11
10
9
7
A
B
C
G1
G2A
G2B
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
CN5
(CLERK CN)
GIL-G-12P-5S
T2-E
1
2
3
4
5
6
7
8
9
10
11
12
D16
C17
0.1
uF
CN2
MLX 5597-12CP
B
KEY CN2
1
2
3
4
5
6
7
8
9
10
11
12
D20
1SS353
X20
+
C21
10uF/16
V
R16
IC7
74HC153
6
5
4
3
10
11
12
13
14
2
1
15
7
9
1C0
1C1
1C2
1C3
2C0
2C1
2C2
2C3
A
B
1G
2G
1Y
2Y
D21
1SS353
FB15
BLM31
R18
IC4
74HC138
1
2
3
6
4
5
15
14
13
12
11
10
9
7
A
B
C
G1
G2A
G2B
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
IC3B
74LS12
5
5
6
4
FB16
BLM31
R19
FB17
BLM31
D15
R21
R30
4.7K
D17
D3
C19
0.1u
F
IC6D
74LS12
5
12
11
13
R29
4.7K
C20
0.1
uF
D19
D5
C18
0.1u
F
FB14
BLM31
CN3
MLX 5229-13A
PB
KEY CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
D1
FB12
BLM31
BZ1
BUZ
R13
X3
IC6C
74LS12
5
9
8
10
D9
R15
47
K
FB13
BLM31
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
1/2
KEY I/F CLERK
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