Service manual
8 7
6 5
4
3
2 1
A
B
C
D
1
234
56
78
D
C
B
A
+5V
10K
330P
+5V
10K
100P
+5V
PHAI
R79 C63 R46
/RFSH
/WR
/RD
/AS
R43 (2-7C) (5-7D)
C60
R44 (2-7C) (5-7D)
C61
R45 (7-7A)
C62
X1
R34 33
R35 33
R36 33
NU
NU
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
P33
50
P34
51
P35
52
P36(DR3)
53
P37(DR4)
54
VCC
55
P40
56
PTMG
57
TOF
58
BOF
59
PRST
60
NEJ
61
SHEN
62
NER
63
VSS
64
TRGI
65
CKDCR2
66
PSTOP
67
P53
68
FVPON
69
FMRS
70
SLIPLMP
71
STOP P57
72
ER P60
73
DR P61
74
CS P62
75
CD P63
76
RR P64
77
RS 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
TXD1
RXD2
TXD2
VSS
EXTAL
XTAL
VSS
PHAI
E
AS
RD
HWR
LWR
RFSH
VCC
MD0
MD1
MD2
STBY
IC6
HD6415108(25X)
D0
D1
NMI
C26
C27
C25
10K x8
RA1
R2633
R2833
R2733
/RESET
D(0~7)
+5V
10K
47P
100P
+5V
+5V
4.7K
1K
C28
C29
C30
C31
C32
R2933
R3033
R3133
R3233
R3333
C34
C35
C36
C37
C38
C39
C40
C33
10K x8
RA2
D2
D3
D4
D5
D6
D7
+24V
TXD2
RXD2
/UATX
/UARX
SCK2
UASCK
/IRQ0
/IRQ1
R47
R48
R49
R37
10KF
R38
12KF
NU
NU
NU
VPJ
HP
RCO
/STOP
R39
NU
NU
NU
NU
R40
R41
R42
R89
C44
C45
C46
C47
C48
C50
C51
C52
C53
C41
10K x8
RA3
C43
C42
C49
10K x8
RA4
A(0~23)
/WAIT
/BACK
/BREQ
DOPS
/DR0
/DR1
C58
R80
+5V
NU
NU
C54
C55
C56
C57
C59
10K x6
RA5
NU
NU
NU
NU
C68
C64
C65
C66
C67
NU
NU
TRGI
/NER
/SHEN
/NEJ
/PRST
/PTMG
+5V
C90
0.1u
C91
0.1u
C92
0.1u
C93
10u10V
C94
47u10V
or
33u10V
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
(5-4A)
(2-8B)
(2-7C) (5-8B) (7-7B)
(2-7B) (5-8D) (7-7D)
(2-3B)
(7-7B)
(7-7B)
(3-5A)
(3-7A)
(3-7A)
(7-7B)
(2-8B)
(2-8B)
(2-3B)
(2-3B)
(2-8B)
(2-3B)
(7-7B)
(2-8B)
(3-5B)
(3-5D)
(2-3B)
(2-2A)
(2-2A)
(2-2A)
CHAPTER.7 CIRCUIT DIAGRAM & PWB LAYOUT
1. Main PWB circuit diagram
1/7
CPU (HD6415108)
330P
+5V
10K
14.7456MHz
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