Service manual
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A
B
C
D
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D
C
B
A
2/12
CPU(HD6415108)
/WR
/RD
/AS
+5V
+5V
+5V
+5V
3-8C
3-8C
3-8C
C92
100P
C91
100P
C90
100P
R130
10K
R136
10K
R134
10K
R132
10K
+5V
C95
0.1u
C96
47u16V
C97
47u16V
R135
100
R133
100
R131
100
(R129)
47
NMI
+5V
/RES
1
NMI
2
VSS
3
D0
4
D1
5
D2
6
D3
7
D4
8
D5
9
D6
10
D7
11
D8
12
D9
13
D10
14
D11
15
D12
16
D13
17
D14
18
D15
19
VSS
20
A0
21
A1
22
A2
23
A3
24
A4
25
A5
26
A6
27
A7
28
A8
29
A9
30
A10
31
A11
32
A12
33
A13
34
A14
35
A15
36
VSS
37
A16
38
A17
39
A18
40
A19
41
A20
42
A21
43
A22
44
A23
45
VSS
46
WAIT
47
BACK
48
BREQ
49
DOPS
50
P34
51
P35
52
P36(DR3)
53
P37(DR4)
54
VCC
55
P40
56
P41
57
P42
58
P43
59
P44
60
NEJ
61
SHEN
62
OPBS
63
VSS
64
TRGI
65
P51
66
P52
67
P53
68
P54
69
FMRS
70
P56
71
STOP P57
72
P60
73
P61
74
P62
75
P63
76
P64
77
P65
78
RCO P66
79
HP P67
80
VSS
81
AVSS
82
VPJ
83
VPR
84
VPTEST
85
VPPS
86
AVCC
87
VCC
88
IRQ0
89
IRQ1
90
SCK1
91
SCK2
92
RXD1
93
TXD1
94
RXD2
95
TXD2
96
VSS
97
EXTAL
98
XTAL
99
VSS
100
PHAI
101
E
102
AS
103
RD
104
HWR
105
LWR
106
RFSH
107
VCC
108
MD0
109
MD1
110
MD2
111
STBY
112
IC8
CPU(HD6415108)
C93
0.1u
C94
0.1u
5-6A
3-8B
+5V
/RESET
R164
4.7K
SR?
SR-1
D0
D1
D2
D3
D4
D5
D6
D7
D[0..7]
3-8C
+5V
10K X8
R191
R192
R194
C110
C111
C112
C113
C114
C115
C117
C116
R187
R188
R189
R190
R193
100PX8
+5V
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
10K X8
A[0..23]
3-8B
+5V
10K X8
R196
R198
R202
R201
R200
R199
R197
R165
R166
R167
R168
R169
R170 R172
R171
R195
+5V
10K X8
ERC
LDRQ
8-4B
8-4B
R139100
R140100
R141100
R142100
R143100
R144100
R145100
R146100
PDS8-2B
/SHEN
8-8B
FRES
BUSY_A
/RDY_A
R173
R174
R175
R176
R177
R178
R179
R180
VCC
Vrf
FIL2
100P
1
3
2
X4
19.66MHz
TM FVHS
7-1D
7-8A
+5V
D28
1SS353
R160
3.6K"F"
R159
16K"F"
+24V
TXD2
RXD2
/IRQ0
/IRQ1
PHAI
+5V +5V +5V
RXD
TXD
+5V +5V +5V +5V
3-8B
6-2C
3-8B
10-7C
10-7C
3-8B
3-8C
SCK2
+5V
6-4B
D8
1SS353
R148
16K"F"
R147
3.6K"F"
C89
47P
C100
NU
R126
4.7K
R127
1K
R128
1K
R149
4.7KX4
R123 R124
R125
/ERS
/CSS
/CDS
/RSS
/RI
/DRS
3-4A
3-4A
+5V
+5V
+5V
+5V
10-7C
R153
10K
R152
10K
R151
10K
R150
0ohm
R155
10K
C107
1000P
2
1
CN12
NER CN
R203
0ohm
R158
0ohm
/PRST
/PTMG
+5V
R137
10K
R138
10K
C99
330p
C98
330p
+5V
/WAIT
+5V
/BACK
100PX8
C134
C135
C136
C137
C138
C139
C140
C141
C104
100P
A12
A13
A14
A15
100PX8
A16
A17
A18
A19
A20
A21
A22
A23
3-3B
+24V
7-6C
100PX8
C119
C120
C121
C123
C128
C129
C118
C122
C124
C125
C127
C126
C130
C131
C132
C133
+24V
C106
100U/35V
COM
DS
/DRAW1
+24V
DS
/DRAW0
+24V
9
16
2
7
15
10
4
5
1
8
3
6
14
11
12
13
IC9
TD62308F
1
2
3
CN11
DR CN
1
2
3
CN10
DR CN
C103
0.1U
C109
0.1U
C101
0.1U
C102
0.1U
<NOTE>
/FRES
BUSY
4-4C
/BREQ
/DR0
/DR1
4-4C
7-7A
/RDY
R122
10K
C88
100P
R161
22K
R163
47K
C105
1000P
C142
1000P
C143
1000P
C144
1000P
R162
4.7K
C50
FRES
BUSY_A
/RDY_A
+5V
+5V
+5V
R185
10K
R186
10K
R182
100
R183
100
R181
100
NOTE
R184
10K
C145
330P
C146
330P
C147
330P
R154
10K
R156
10K
R157
0ohm
C108
1000P
2
1
CN13
NEJ CN
R150,153,155,157 : ERA450 ONLY
R151,156,158,203 : ERA455 ONLY
F3
UL CSA
T400mAL
/250V
Symbol/PartsCod)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -