C301 33/16
C305
103
5
1
2
3
4
IC391
C391 104
3
7
5
IC392
5
1
2
3
4
IC393
6
1
2
IC392
C392 104
8
V
4
G
IC392
C393 104
R302 103
R301 103
R305 222
R306 222
R307 222
R308
472
R315 0R00
1
5
6
7
8
2
3
4
Z306 103
1
5
6
7
8
2
3
4
Z301 0R00
1
5
6
7
8
2
3
4
Z302 0R00
1
5
6
7
8
2
3
4
Z303 0R00
1
5
6
7
8
2
3
4
Z304 0R00
R304
103
R303
103
R368
103
5
1
2
3
4
6
7
8
Z307 0R00
5
1
2
3
4
6
7
8
Z308 0R00
5
1
2
3
4
6
7
8
Z309 0R00
5
1
2
3
4
6
7
8
Z310 0R00
R309
0R00
R310
0R00
5
1
2
3
4
6
7
8
Z314 0R00
L301 100
C304
103
C303
103
C302
103
R344
0R00
R345
OPEN
C342
104
C343
104
1 Standby
2 SGline14
24
REGout
23
SGline15
3 SGline13
4 SGline12
5 SGline11
6 GND
25 GND
7 SGline10
8 SGline9
9 SGline8
10 SGline7
11 SGline6
12 VCC
22
SGline16
21
SGline17
20
SGline18
19
GND
26
GND
18
SGline1
17
SGline2
16
SGline3
15
SGline4
14
SGline5
13
VCC
IC341
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
CN301
R311
221
R313
331
C341 104
R341
104
R342 473
Q341
R343 332
1
5
6
7
8
2
3
4
Z313 0R00
1
5
6
7
8
2
3
4
Z312 0R00
1
5
6
7
8
2
3
4
Z316
221
5
1
2
3
4
6
7
8
Z317
221
1
5
6
7
8
2
3
4
Z320
331
5
1
2
3
4
6
7
8
Z321
331
C351 33/16
C355
103
R352 103
R351 103
R355 222
R356 222
R357 222
R358
472
R365 0R00
1
5
6
7
8
2
3
4
Z356 103
1
5
6
7
8
2
3
4
Z351 0R00
1
5
6
7
8
2
3
4
Z352 0R00
1
5
6
7
8
2
3
4
Z353 0R00
1
5
6
7
8
2
3
4
Z354 0R00
R354
103
R353
103
R369
103
5
1
2
3
4
6
7
8
Z357 0R00
5
1
2
3
4
6
7
8
Z359 0R00
5
1
2
3
4
6
7
8
Z360 0R00
R359
0R00
R360
0R00
5
1
2
3
4
6
7
8
Z364 0R00
5
1
2
3
4
6
7
8
Z365 0R00
L351 100
C354
103
C353
103
C352
103
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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
CN351
R361
221
R363
331
1
5
6
7
8
2
3
4
Z363 0R00
1
5
6
7
8
2
3
4
Z362 0R00
5
1
2
3
4
6
7
8
Z369
221
1
5
6
7
8
2
3
4
Z373
331
1
5
6
7
8
2
3
4
Z358 0R00
R362
221
5
1
2
3
4
6
7
8
Z368
221
5
1
2
3
4
6
7
8
Z367
221
1
5
6
7
8
2
3
4
Z372
331
5
1
2
3
4
6
7
8
Z371
331
R363
331
5
1
2
3
4
6
7
8
Z315 0R00
5
1
2
3
4
6
7
8
Z366
221
5
1
2
3
4
6
7
8
Z370
331
6 VDD
18 VDD
31 VDD
43 VDD
49 VDD
63 VDD
73 VDD
107 VDD
116 VDD
131 VDD
137 VDD
125 DMA0
126 TP
135 DMR/#W
129 #DACK
54 SCLK
138 DMD15
139 DMD14
141 DMD13
142 DMD12
143 DMD11
144 DMD10
1 DMD9
3 DMD8
4 DMD7
5 DMD6
7 DMD5
9 DMD4
10 DMD3
11 DMD2
13 DMD1
14 DMD0
130 DREQ
59 MODE1
60 MODE0
57
A0
56
A1
55
A2
52
A3
51
A4
19
D15
20
D14
22
D13
23
D12
24
D11
26
D10
27
D9
28
D8
29
D7
32
D6
33
D5
34
D4
36
D3
37
D2
38
D1
39
D0
2
VSS
8
VSS
12
VSS
16
VSS
21
VSS
25
VSS
30
VSS
35
VSS
40
VSS
45
VSS
53
VSS
58
VSS
66
VSS
77
VSS
82
VSS
88
VSS
93
VSS
98
VSS
102
VSS
112
VSS
122
VSS
128
VSS
134
VSS
140
VSS
68
BSYOE
65
SELOE
67
RSTOE
119
UDBOEP
108
LDBOEP
120
DBOE15
64
INIT
62
TARG
61 #S/DESL
121
DBOE14
123
DBOE13
124
DBOE12
69
DBOE11
70
DBOE10
71
DBOE9
72
DBOE8
109
DBOE7
110
DBOE6
111
DBOE5
113
DBOE4
114
DBOE3
115
DBOE2
117
DBOE1
118
DBOE0
41 LDP
17 UDP
15 LDMDP
136 UDMDP
46 R/#W
50
#INT
47
#CS1
101
#UDBP
90
#LDBP
103
#DB15
104
#DB14
105
#DB13
106
#DB12
74
#DB11
75
#DB10
76
#DB9
78
#DB8
91
#DB7
92
#DB6
94
#DB5
95
#DB4
96
#DB3
97
#DB2
99
#DB1
100
#DB0
79
#I/O
80
#REQ
81
#C/D
83
#SEL
84
#MSG
85
#RST
86
#ACK
87
#BSY
89
#ATN
132 #DMUDS
133 #DMLDS
127 #RESET
44 #LDS
42 #UDS
48 #CS0
IC351
6 VDD
18 VDD
31 VDD
43 VDD
49 VDD
63 VDD
73 VDD
107 VDD
116 VDD
131 VDD
137 VDD
125 DMA0
126 TP
135 DMR/#W
129 #DACK
54 SCLK
138 DMD15
139 DMD14
141 DMD13
142 DMD12
143 DMD11
144 DMD10
1 DMD9
3 DMD8
4 DMD7
5 DMD6
7 DMD5
9 DMD4
10 DMD3
11 DMD2
13 DMD1
14 DMD0
130 DREQ
59 MODE1
60 MODE0
57
A0
56
A1
55
A2
52
A3
51
A4
19
D15
20
D14
22
D13
23
D12
24
D11
26
D10
27
D9
28
D8
29
D7
32
D6
33
D5
34
D4
36
D3
37
D2
38
D1
39
D0
2
VSS
8
VSS
12
VSS
16
VSS
21
VSS
25
VSS
30
VSS
35
VSS
40
VSS
45
VSS
53
VSS
58
VSS
66
VSS
77
VSS
82
VSS
88
VSS
93
VSS
98
VSS
102
VSS
112
VSS
122
VSS
128
VSS
134
VSS
140
VSS
68
BSYOE
65
SELOE
67
RSTOE
119
UDBOEP
108
LDBOEP
120
DBOE15
64
INIT
62
TARG
61 #S/DESL
121
DBOE14
123
DBOE13
124
DBOE12
69
DBOE11
70
DBOE10
71
DBOE9
72
DBOE8
109
DBOE7
110
DBOE6
111
DBOE5
113
DBOE4
114
DBOE3
115
DBOE2
117
DBOE1
118
DBOE0
41 LDP
17 UDP
15 LDMDP
136 UDMDP
46 R/#W
50
#INT
47
#CS1
101
#UDBP
90
#LDBP
103
#DB15
104
#DB14
105
#DB13
106
#DB12
74
#DB11
75
#DB10
76
#DB9
78
#DB8
91
#DB7
92
#DB6
94
#DB5
95
#DB4
96
#DB3
97
#DB2
99
#DB1
100
#DB0
79
#I/O
80
#REQ
81
#C/D
83
#SEL
84
#MSG
85
#RST
86
#ACK
87
#BSY
89
#ATN
132 #DMUDS
133 #DMLDS
127 #RESET
44 #LDS
42 #UDS
48 #CS0
IC301
V3D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
V5D
5
1
2
3
4
6
7
8
Z375
221
5
1
2
3
4
6
7
8
Z374
221
1
5
6
7
8
2
3
4
Z377 331
1
5
6
7
8
2
3
4
Z376 331
R367
331
R366 221
V5D
V5D
V3D
SIRQCS
5RD
SPCIRQ
STCLK
SRSTA
5RDWR
LDS
UDS
SPCACS
SCNTA3
SCNTA2
SCNTA1
SCNTA0
DA0
DA4
DA1
DA2
DA3
DA5
DA6
DA7
DA8
DA9
DA10
DA11
DA12
DA13
DA14
DA15
5ADR1
5ADR2
5ADR3
5ADR4
5DAT15
5DAT14
5DAT13
5DAT12
5DAT11
5DAT10
5DAT9
5DAT8
5DAT7
5DAT6
5DAT5
5DAT4
5DAT3
5DAT2
5DAT1
5DAT0
SCA0
DBA0
SCA0
SCA1
SCA2
SCA3
SCA4
SCA5
SCA6
SCA7
SCA8
SCA8
SCA7
SCA6
SCA5
DBA5
DBA6
DBA7
DBA16
SCA0
SCA1
SCA2
SCA3
SCA4
DBA7
DBA16
DBA8
DBA9
DBA10
DBA11
DBA12
DBA13
DBA14
DBA15
DBA17
DBA6
DBA5
DBA4
DBA3
DBA2
DBA1
DBA0
TERM
SCA1
SCA2
SCA3
SCA4
SCA5
SCA6
SCA7
SCA8
DBA1
DBA2
DBA3
DBA4
DBA5
DBA6
DBA7
DBA8
DBA9
DBA10
DBA11
DBA12
DBA13
DBA14
DBA15
DBA16
DBA17
SRSTB
SPCBCS
SCNTB3
SCNTB2
SCNTB1
SCNTB0
5ADR1
5ADR2
5ADR3
5ADR4
5DAT15
5DAT14
5DAT13
5DAT12
5DAT11
5DAT10
5DAT9
5DAT8
5DAT7
5DAT6
5DAT5
5DAT4
5DAT3
5DAT2
5DAT1
5DAT0
SCB0
DBB0
SCB0
SCB8
DBB0
DBB1
DBB2
DBB3
DBB4
DBB5
DBB6
DBB7
DBB16
DBB1
DBB2
DBB3
DBB4
DBB5
DBB6
DBB7
DBB8
DBB9
DBB10
DBB11
DBB12
DBB13
DBB14
DBB15
DBB16
DBB17
SCB1
SCB2
SCB3
SCB4
SCB5
SCB6
SCB7
SCB8
DBB0
DBB1
DBB2
DBB3
DBB4
DBB5
DBB6
DBB7
DBB8
DBB9
DBB10
DBB11
DBB12
DBB13
DBB14
DBB15
DBB16
DBB17
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
5DAT1
5DAT0
SCB1
SCB2
SCB3
SCB4
SCB5
SCB6
SCB7
DBB0
DBB1
DBB2
DBB3
DBB4
DBB5
DBB6
DBB7
SCB8
SCB7
SCB6
SCB5
SCB4
SCB3
SCB2
SCB1
SCB0
5DAT(0-15)
SCNTA(0-3)
DA(0-15)
5ADR(1-21)
GND
GND
SCA8
SCA7
SCA6
SCA5
SCA4
SCA3
SCA2
SCA1
SCA0
GND
GND
DBA0
GND
GND
GND
GND
GND
LDBP
GND
GND
GND
GND
GND
GND
OPEN
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
DBA1
DBA2
DBA3
DBA4
DBA5
DBA6
DBA7
GND
GND
TERMPWR
5DAT(0-15)
SCNTB(0-3)
DB(0-15)
5ADR(1-21)
GND
GND
GND
GND
GND
GND
GND
GND
GND
LDBP
GND
GND
GND
GND
GND
GND
OPEN
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
TERMPWR
(2/10)
(2/10)
(2/10)
(1/10)
(4/10)
(3/10)
(1/10)
(3/10)
(2/10)
(1/10)
(1/10)
MAIN BOARD (5/10)
(6/10)
(6/10)
(2,6,7/10)
(4/10)
(4/10)
(4/10)
(4/10)
(6/10)
(2,6,7/10)
TO
SCSI-IDE
BOARD...CN3
TO
EXTENSION
STORAGE PORT
TO
COPY PORT
A
B
C
D
E
1
2
3
4
(1/10)
(1/10)
< VOLTAGE >
MAIN BOARD (5/10)
< INDEX >
MAIN BOARD (5/10)
IC301
C2/C3/D2/D3/E2/E3
IC341
C3/C4
IC351
A2/A3/B2/B3
IC391
C1
IC392
C3,C4
IC393
C3
Q341
D3
IC391
3.0
5.0
0
5.0
5.0
IC393
5.0
5.0
0
3.1
3.1
IC392
5.0
5.0
5.0
0
5.0
5.0
5.0
5.0
Pin 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
IC341
0.3
2.8
2.8
2.8
2.8
0
2.8
2.8
2.8
2.8
2.8
5.0
5.0
2.8
2.8
2.8
2.8
2.8
0
2.8
2.8
2.8
2.8
2.9
0
0
Q341
B
4.4
C
0.3
E
5.0
Note:
The value indicated in the schematic diagram
should be read as follows:
Multiplier (0 - 5)
2nd. Significant Digit (0 - 9)
1st. Significant Digit (1 - 9)
<Example>
For Resistor:
330
33 x 10 = 33
Ω
561
56 x 10 = 560
Ω
123
12 x 10 = 12k
Ω
0R00 = 0
Ω
0
1
3
820
82 x 10 = 82 pF
102
10 x 10 = 1000 pF = 0.001
µ
F
104
10 x 10 = 100000 pF = 0.1
µ
F
0
2
4
For Capacitor
(Except Electrolytic Capacitor and Tantalum Capacitor):
0
1
010
1 x 10 =
1
µ
H
8R2
8.2 x 10 =
8.2
µ
H
101
10 x 10 =
100
µ
H
0
For Coil:
– 35 –
SCHEMATIC DIAGRAM OF MAIN BOARD (5/10)