Service manual
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CHAPTER 8. CIRCUIT DIAGRAM
1. MAIN PWB CIRCUIT DIAGRAM
1) CPU
100pFX3
NOT USED NOT USED
R58
10K
R64
47
R66 47
R67 47
R68 47
R69 47
C46 C47 C48 C49 C50
X1
19.66MHz
/AS
/RD
/RFSH
#
IPLON0
/HWR
VCC
VCC
1
8
2
7
3
6
4
5
BR39
10K*4
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
P30 WAIT
47
P31 BACK
48
P32 BREQ
49
P33
50
P34
51
P35
52
P36
53
P37
54
VCC
55
P40
56
P41
57
P42
58
P43
59
FTI1 P44
60
P45
61
FTI2 P46
62
P47
63
VSS
64
P50
65
P51
66
P52
67
P53
68
P54
69
P55
70
P56
71
P57
72
P60
73
P61
74
P62
75
P63
76
P64
77
P65
78
P66
79
P67
80
VSS
81
AVSS
82
(P70)VPJ
83
(P71)VPR
84
(P72)VPTEST
85
(P73)VPPS
86
AVCC
87
VCC
88
IRQ0
89
IRQ1
90
SCK1 IRQ2
91
SCK2 IRQ3
92
RXD1
93
TXD1
94
RXD2
95
TXD2
96
VSS
97
EXTAL
98
XTAL
99
VSS
100
X
101
E
102
AS
103
RD
104
HWR
105
LWR
106
RFSH
107
VCC
108
MD0
109
MD1
110
MD2
111
STBY
112
IC1
HD641510810
/RESET
NMI
D0
D1
VCC
18
27
36
45
BR33
100*4
C1
C2
C3
C4
C5
C6
C7
C8
100pF
X8
D[0..15]
D8
D9
D0
D1
D2
D3
D4
D5
D6
D7
VCC
18
27
36
45
BR23
10K*4
18
27
36
45
BR24
10K*4
18
27
36
45
BR25
10K*4
C9
C10
C11
C12
C13
C14
C15
C16
100pF
X8
D[0..15]
A[0..23]
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
D10
D11
D12
D13
D14
D15
VCC
18
27
36
45
BR27
10K*4
18
27
36
45
BR28
10K*4
18
27
36
45
BR29
10K*4
18
27
36
45
BR30
10K*4
18
27
36
45
BR26
10K*4
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
18
27
36
45
BR34
100*4
18
27
36
45
BR35
100*4
18
27
36
45
BR36
100*4
NOT USED
FOR RS232C CH8
! Be Short Pattern
X1
1
X2
2
GND
3
FS0
4
OE#
8
FS1
7
VDD
6
CLK
5
IC2
(W42C31-03)
R70 (33)
C52
(10uF/10V OS)
C53
(0.1uF)
FB1
(BFW7550R2)
SCKI
RXDI
TXDI
/IRQ0
/STOP
/IRQ1
FVPON
NORDY
/IPLON0
/CI2
/RTS2
UASCK
/IPLON1
VRF
TM
/SRESET
PNLSNS
/IPLON1
/IPLON0
VPR
/VPTEST
VCC
/TXD2
/RCVDT2
C56
330pF
C191
330pF
1
8
2
7
3
6
4
5
BR37
10K*4
VCC
2
1
R72
C55
(8pF)
C54
(8pF)
X2
(19.6608MHz)
R71
(0)
D1
1SS353
R78
16KF
C59
R79
3.6KF
/VPTEST
VCC +24V
VCC
D2
1SS353
R80
16KF
R81
3.6KF
VPR
VCC
FVHS
1
2
CN1
REJ CN(5267-02A RED)
FOR RS232C CH8
C44
0.1uF
C45
10uF/10V OS
R82
10K
R83
(0)
R84
10K
R85
(10K)
R86
0
C57
470pF
C58
330pF
C60
1000pF
MCRINT
/DCD2
/CTS2
/DSR2
/DTR2
/TPRCRQ
VCC
VCC
RSDOWN
JSDOWN
C29
C30
C31
C32
100pF
X8
C33
C34
C35
C36
C37
C38
C39
C40
100pF
X8
C41
100pF
C43
0.1uF
C51
330pF
C42
100pF
/BACK
/BREQ
DOPS
/DR0
/DR1
/WAIT
/OPBS
VCC
1
8
2
7
3
6
4
5
BR38
10K*4
C17
C18
C19
C20
C21
C22
C23
C24
100pF
X8
C25
C26
C27
C28
A23A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
|LINK
|POWER.SCH
18
27
36
45
BR31
10K*4
18
27
36
45
BR32
10K*4
|NEW_GA.SCH
|FLASH.SCH
|RS232C.SCH
|CN.SCH
|FMC.SCH
/OPBS
/BREQ
MCRINT
/TPRCRQ
|LCDC.SCH
|DRAWER.SCH
R87
10K
R88
(0)
R89
10K
R90
(10K)
R91
0
C61
1000pF
VCC
1
2
CN2
NEJ CN(5267-02A WHITE)