Service manual
8 7 6 5 4
3
2 1
A
B
C
D
12345678
D
C
B
A
SRN1
X 16
S_A0
S_A1
S_A2
S_A3
S_A4
S_A5
S_A6
S_A7
S_A8
S_A9
S_A10
S_A11
S_A12
S_A13
S_A14
S_A15
S_A0
S_A1
S_A2
S_A3
S_A4
S_A5
S_A6
S_A7
S_A8
S_A9
S_A10
S_A11
S_A12
S_A13
S_A14
S_A15
S_D0
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_A6
S_A0
S_A1
S_M1
S_IORQ-
S_RDS-
S_INT
S_INTS-
S_TM0
S_TM1
S_RES-
VCC
VCC
VCC
VCC
R39
10K
R31
R38
R30
R37
R29
R36
R28
R14
R21
R16
R15
R35
R20
R84
R22
R32
10K
R40
C129
0.1uF
D0
1
D1
2
D2
3
D3
4
D4
8
D5
9
D6
10
D7
12
CE
31
CS0
33
CS1
35
M1
27
IORQ
21
RD
14
IEI
25
IEO
22
INT
23
CLK
29
CLK/TRG0
41
ZC/TO0
16
CLK/TRG1
40
ZC/TO1
18
CLK/TRG2
37
ZC/TO2
19
CLK/TRG3
36
RESET
32
G
N
D
1
3
V
C
C
4
3
IC20
Z80-CTC
X 8
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_M1
S_MRQ-
S_IORQ-
S_WRS-
S_RDS-
S_WAIT-
S_INT
S_RES-
VCC
VCC
C70
100pF
C72
C73
C106
C65
C68
C59
C67
R97 10K
R49 10K
R89 10K
R48 10K
R92 10K
R70 3K
R91 3K
R71 10K
R69
10K
C104
330pF
A0
27
A1
28
A2
29
A3
30
A4
31
A5
32
A6
34
A7
35
A8
36
A9
37
A10
38
A11
40
A12
41
A13
42
A14
43
A15
44
D0
9
D1
10
D2
7
D3
3
D4
2
D5
4
D6
5
D7
8
M1
24
MREQ
15
IORQ
16
WR
19
RD
18
REFSH
25
HALT
14
WAIT
21
INT
12
NMI
13
RESET
23
BUSRQ
22
BUSAK
20
CLK
1
G
N
D
2
6
+
5
V
6
IC14
Z80-CPU
C43
0.1uF
IC13 14PIN - - - VCC
7,10,11,13PIN - - - GND
IC13 VCC---GND
S_A0
S_A1
S_A2
S_A3
S_A4
S_A5
S_A6
S_A7
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_DACK0
S_DACK1
S_DACK2
S_DACK3
S_MRD-
S_IOR-
S_IOW-
S_RES-
VCC
VCC
VCC
S_WAIT-
D
2
C
L
K
3
Q5Q6
PR
4
CL
1
IC13A
74HC74
30
31
32
33
36
37
38
39
40
41
7
1
8
9
2
15
14
13
12 5
35
3
4
43
42
11
10
21
22
18
19
20
23
24
25
26
27
1
6
2
9
IC43
UPD71037GB
C263
0.1uF
C1
10uF/16V
C99
10pF
R62
1K
C8
0.1uF
/SRNRESET
SRNRESET
S_DRQ0
S_DRQ1
S_DRQ2
S_DRQ3
S_AEN
S_ASTB
S_AEN
S_DACK1
S_DACK0
S_DACK2
S_DACK3
S_DACK01
S_DACK23
S_RES-
S
_
D
0
S
_
D
1
S
_
D
2
S
_
D
3
S
_
D
4
S
_
D
5
S
_
D
6
S
_
D
7
/TC
TCS
40
AEN
38
ASTB
39
DRQRS
42
DRQWS
43
DAK23
41
RDH
44
WRH
45
VDD
33
VDD
73
NC
34
NC
53
VSS
12
VSS
52
CS
51
DB0
54
DB1
55
DB2
56
DB3
57
DB4
58
DB5
59
DB6
60
D
B
7
6
1
D
A
K
4
7
T
C
H
4
8
D
R
Q
R
H
4
9
D
R
Q
W
H
5
0
I
N
T
H
4
6
A
B
1
6
4
A
B
0
6
2
C
O
L
6
5
R
D
I
6
6
T
D
I
6
7
C
L
K
1
T
M
0
9
T
M
1
1
0
R
T
S
6
8
R
X
C
6
9
RXD
70
TXC
71
TXD
72
E
74
IRQ
75
LCS
76
RS1
78
RS0
79
MSK
80
MWR
24
INTS
7
WRS
6
RDS
5
MREQ
4
IOREQ
3
A15
14
A10
15
A9
16
A8
17
A5
18
A4
19
A1
20
A
0
2
1
W
A
I
T
1
3
I
O
/
W
R
3
6
D
A
K
0
1
2
2
I
O
/
R
D
3
7
R
E
S
3
5
P
H
A
I
8
M
R
D
1
1
D
7
2
5
D
6
2
6
D
5
2
7
D
4
2
8
D
3
2
9
D
2
3
0
D
1
3
1
D
0
3
2
IC11
MB62H149
4
5
6
IC41B
74HC00
9
10
8
IC41C
74HC00
S_E
S_RS0
S_RS1
S_A1
S_A4
S
_
M
R
D
-
S
_
W
A
I
T
-
S_A0
S
_
I
O
R
-
S
_
I
O
W
-
FL3
RCORF6702BHZZ
3 4
IC44B
74HC04
5 6
IC44C
74HC04
9 8
IC44D
74HC04
E
13
RSO
10
RS1
11
DCD
27
RXC
4
RXD
3
TXC
5
CTS
28
R/W
12
CS
9
RESET
8
TXD
6
RTS
2
LO/DTR
26
FLAG/D
25
TDSR
24
RDSR
23
IRQ
7
D0
22
D1
21
D2
20
D3
19
D4
18
D5
17
D6
16
D7
15
V
C
C
1
4
V
S
S
1
IC21
MC68B54
C102
0.1uF
X 8
14PIN VCC
7PIN GND
IC45 VCC---GND
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_DRQ0
S_TXD
S_RTS-
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_A0
S_A1
S_A2
S_A3
S_A4
S_A5
S_A6
S_A7
S_A8
S_A9
S_A10
S_A15
VCC
VCC
VCKDC
VCC
VCC
R33
R74
R23
R18
R17
R12
C41
0.1uF
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
A8
25
A9
24
A10
21
A11
23
A12
2
CS1
20
CS2
26
WE
27
OE
22
D0
11
D1
12
D2
13
D3
15
D4
16
D5
17
D6
18
D7
19
V
C
C
2
8
G
N
D
1
4
IC1
BR6265BF-10L
C119
220pF
9
10
8
IC39C
74HC00
12
13
11
IC45D
74HC08
1
2
3
IC45A
74HC08
C111
0.1uF
R102
10k
R98
10K
/RESET
S_MWR-
S_MRD-
IC39
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
14PIN VCC
7PIN GND
14PIN VCC
7PIN GND
SRN_RTS
S_A0
S_A1
S_A2
S_A3
S_A4
S_A5
S_A6
S_A7
S_A8
S_A9
S_A10
S_A11
S_A12
S_A13
S_A15
S_MRD-
S_DRQ1
S_IRQ-
S_D0
S_D1
S_D2
S_D3
S_D4
S_D5
S_D6
S_D7
S_RES-
VCC
VCC
VCC
C42
100pF
C66
1000pF
C2
10uF/16V
C64
0.1uF
A0
10
A1
9
A2
8
A3
7
A4
6
A5
5
A6
4
A7
3
A8
25
A9
24
A10
21
A11
23
A12
2
A13
26
A14
27
CE
20
OE
22
VPP
1
O0
11
O1
12
O2
13
O3
15
O4
16
O5
17
O6
18
O7
19
V
C
C
2
8
G
N
D
1
4
IC8
EP-ROM
5 6
IC42C
9 8
IC42D
11 10
IC42E
13 12
IC42F
74HCU04
C120
220pF
C105
0.1uF
IC44 VCC---GND
S_RXC
S_RXD
S_TXC
S_LCS-
S_RES-
S_A5
S_A8
S_A9
S_A10
S_A15
S_IORQ-
S_MRQ-
S_RDS-
S_WRS-
S_INTS-
S_MWR-
S_MSK
S_RS0
S_RS1
S_LCS-
S_IRQ-
S_E
S_TXD
S_TXC
S_RXD
S
_
R
T
S
-
S
_
T
M
1
S
_
T
M
0
S_MRD-
S_IOW-
S_DACK01
4
5
6
IC45B
74HC08
9
10
8
IC45C
74HC08
11 10
IC44E
74HC04
23 PIN
63 PIN
77 PIN
NC: 2 PIN
14
/SRCS
/RDH
/WRH
DB[0..7]
AH1
/SINT
AH0
S_ASTB
S_DRQ2
S_DRQ3
DB0
DB1
DB2
DB3
DB4
DB5
DB6
/TC
DB7
VCC
VCC
VCC
VCC
VCC
R64
0
1
3
1
2
IC44F
74HC04
C6
OS 33uF/10V
C81
0.1uF
R61
10K
C47
0.1uF
IC42
VCC---GND
1 2
IC42A 74HCU04
C227
100pF
R50
1M
3 4
IC42B
74HCU04
X1
CSTCS16MX040
S_16MHz
13
2
FB33
BLM21
C85
100pF
TDI
RDI
COL
/SRN_RTS
TO SRN2
/SRN_RTS
TDI
RDI
COL
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