Service manual
ER-A410U/ER-A420U CIRCUIT DIAGRAM AND PWB LAYOUT
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A
B
C
D
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3
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D
C
B
A
CPU CG 2/7
VCC:20pin
GND:10pin
PLACE NEAR CPU!!!
7pin:GND
7pin:GND
*IC12 14pin:VDD
*IC6
7pin:GND
*IC14 14pin:VDD
*IC8 14pin:VDD
150pF*10(C30-C39)150pF*8(C12-C19)
100pF*8(C20-C27)
D0 a
D1 b
D2 c
D3 d
D4 e
D5 f
D6 g
BCLK D7 dp
A18
A16
A14
A12
A7 A13
A6 A8
A5 A9
A4 A11
A3
A2
A1 A10
A0
D0 D7
D1 D6
D2 D5
D4
D3
/CS0
A18
A19
BA1
D[0..7]
A[0..19]
P95
P96
A0
A1
A2
A3
A4
A5
A6
A7
JAS
JBS
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
VHCOM
D0
D1
D2
D3
D4
D5
D6
D7
c
d
e
f
g
dp
A19
a
b
/RESET
/CS0
/CS2
/WR
/RD
/WR
/RD
RAS
RBS
RCS
RDS
JCS
JDS
A18
/CS3
SI
SO
PCLK
TM
VPTEST
P94
/LE0W
/STRB4
/STRB3
/STRB2
/STRB1
P91
P90
/CS1
BA0
BA1
/LATCH
/RES
VREF
IPLON
/POFF
/RES
/RS2
DRAWER
1
/RDY
/RS1
/EFTRES
DRAWER
2
/ER1
/CD1
/DR1
RXD2
TXD2
RXD1
TXD1
/CS1
/CS2
/CS0
A19
BA1
A18
/CS1
BA1
A15
A17
/CS2
/CTS1
/ER2
/EFTC
/POFF
BA23
/POFF
VDD
VCC
VCC
VDD
VDD
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VDD
VCC
VDD
VDD
VDD
VCC VCC
VCC
VDD
VDD
C46
0.1uF
C43
0.1uF
C34
+
C65
(10u
F/50V)
R29
100
R9
10K
R149
2.2K
IC14B
74LV00A
4
5
6
R52
100
R53
100
C23
R15
10K
R10
10K
R36
10K
R47
47K
R16
10K
R81
10k
R56
2.2K
R17
10K
IC8A
74LV27A
1
2
13
12
R143
(10k)
C67
100pF
C18
C40
30pF
C27
R51
10K
R28
100
R65
10K
C131
(0.1uF)
R62
10K
C68
0.1uF
C35C30
R63
10K
R11
10K
C36
R148
0
C71
(330pF)
R57
2.2K
+
C62
(10u
F/50V)
C22C21
IC8C
74LV27A
9
10
11
8
R66
10K
R37
10K
R32
10K
C19
R18
10K
C37
R27
100
R19
10K
X3
(CST12.0MT
W)
2
3
1
R25 100
R24
10K
C44
150pF
R58
2.2K
IC8B
74LV27A
3
4
5
6
C66
100pF
C58
100pF
R76
470
C31
C26
D15
1SS355
R12
10K
C70
330pF
C20
R30
100
R50
10K
IC3
M30620
SAFP
81
80
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
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
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
D7
D8
D6
D5
D4
D3
D2
D1
D0
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AVSS
AN0
VREF
AVCC
SIN4
SOUT4
CLK4
TB4IN
TB3IN
SOUT3
SIN3
CLK3
BYTE
CNVSS
XCIN
XCOUT
RESET
XOUT
VSS
XIN
VCC
NMI
INT2
INT1
INT0
TA4IN/U
TA4OUT/U
TB3IN
TBEOUT
TA2INW
TA2OUTW
TA1IN/V
TA1OUT/V
TB5IN
TB5OUT
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
VSS
A8
VCC
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
CS0
CS1
CS2
CS3
WR
BHE
RD
CBCLK
HLDA
HOLD
ALE
CLKOUT
RTS0
CLK0
RXD0
TXD0
CLKS1
CLK1
RXD1
TXD1
IC14C
74LV00A
9
10
8
IC12B
74LV00A
4
5
6
R80
47K
+
C59
10uF/10
V,OS
C63
(30pF)
R26
100
R20
10K
C13
R147
(0)
R68
3.3K
C57
R59
2.2K C38
R45
47K
R38
10K
R78
10K
R33
10K
C69
100pF
R79
47K
R150
12K
C56
C32
C12
R13
10K
C55
C25
C54
R64
2.2K
R60
2.2K
R144
10K
IC14D
74LV00A
12
13
11
IC12C
74LV00A
9
10
8
R69
R77
10K
R71
R43
10K
B
+
BZ2
2048BH
X2
CST1
2.0MTW
2
3
1
R73
R21
10K
R72
R42
10K
R70
10Kx5
C53
330
pFx5
C14
IC4
FS781
1
2
3
4 5
6
7
8
XIN
XOUT
S1
LF VSS
FSOUT
S0
VDD
C39
R39
10K
D14
1SS355
C33
IC14A
74LV00A
1
2
3
R46
47K
R61
2.2K
C24
R34
10K
+
C60
10uF/1
0V,OS
C29
27pF
IC9A
74LV11A
1
2
13
12
D6
1SS355
C64
(30pF)
R75
(0)
R31
330
R54
2.2K
X1
3
2.768KHz
IC12A
74LV00A
1
2
3
C28
18pF
R22
10K
R67
10K
C45
150pF
C15 C16
R40
10K
IC12D
74LV00A
12
13
11
IC6
74HC273
3
4
7
8
13
14
17
18
11
1
2
5
6
9
12
15
16
19
D1
D2
D3
D4
D5
D6
D7
D8
CLK
CLR
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
R44
10k
IC10
74LV138A
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
A
B
C
G2A
G2B
G1
Y7
GND
Y6
Y5
Y4
Y3
Y2
Y1
Y0
VCC
C47
0.1uF
C48
330pF
R14
10K
C41
0.1uF
R35
10K
Q12
C2412K
C72
330pF
R74
33
C17
R23
10K
R48
10K
IC16
4MR
AM HY628400ALLT2-70
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A18
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND
VCC
A15
A17
WR
A13
A8
A9
A11
RD
A10
CS
D7
D6
D5
D4
D3
R55
2.2K
C42
0.1uF
R41
10K