Fostex D-108 Service Manual page 46

CPU, MAIN, D-108 (2/11)
D+5
D+5
DGND
DGND GND
MEMORY
/EPROM /EPROM
FM_RDY FM_RDY
/RST
/RST /RST
D[0..15]
D[0..15] D[0..15]
A[0..18]
A[0..18] A[0..18]
MEMORY
D+5
D+5 D+5
DGND DGND
DGND
RDWR
RDWR RDWR
/CS0
/CS0 /CS0
/CS2
/CS2 /CS2
/RAS
/RAS /RAS
/LCAS
/LCAS /LCAS
/UCAS
/UCAS /UCAS
/RD
/RD /RD
/WR
/WR /WR
MEMORY.SCH
D[0..15]
D[0..15]
GR A[0..18]
A[0..18]
A0
C79
(CHIP C)
DGND
/WR
/WR
GR /RD
/RD
/CS_IDE
D+5
R93
47K
J7
1 /RST_DISP
2 /ATN1
TO 3 /ATN2
4 TXD1
DISPLAY 5 RXD1
6 SCK1
7 DGND
D+5
8283M7P
D8 D9 D10 D11 D12
D14 D15 D16 D17 D18
R92
47K
D+5
R901
10K
C901
470p
DGND
D+5
R45
10K
/EPROM
FM_RDY
/DREQ1
GR
/DACK1
/RST_ADDA
ADDA
/MUTE
R77
R46 10K
10K
DGND
DGND
A0
A1
A2
1
PE14/AH
A3 2
PE15/IRQOUT
3
VSS
A4 4
PC0/A0
5
PC1/A1
A5 6
PC2/A2
7
PC3/A3
A6 8
PC4/A4
9
PC5/A5
A7 10
PC6/A6
11
PC7/A7
A8 12
PC8/A8
A9 13
PC9/A9
A10 14
PC10/A10
A11 15
PC11/A11
A12 16
PC12/A12
A13 17
PC13/A13
A14 18
PC14/A14
A15 19
PC15/A15
A16 20
PB0/A16
21
VCC
A17 22
PB1/A17
A18 23
VSS
24
PB2/RAS
25
PB3/CASL
26
PB4/CASH
27
VSS
28
PB5/RDWR
D[0..15]
/AIRQ1
/ATA_INT1
GR
IORDY1
C95 C930
1
100p 100p
U24D
DGND
13
SCSI_CS 11
SCSI_CS
GR 12
R78
100
/CS_IDE 74HC32
GR /CS1
C92
/CS1
(CHIP C)
R62
DGND
100
/RST_DISP
R63
/ATN1
100
R64 /ATN2
100 R43 100
TXD1
R65
RXD1
100 R44 100
SCK1
DGND
D13
C78
470P
D19
DGND
POWER
POWER_SEL
D+5
OPTION
/OP_IRQ
R66
/422ON D3
R49
1.5K
330
SELF_CHECK
C76
D4
VARI/EXT 0.01
GR
DMA_SEL
SCSI_TMOUT /RST
/RST
/RST_DISP
U904E U904F
10 11 12 13 3
74HC04 74HC04
8
D+5
C94 C909
0.01 0.01
D+5
R69
2.2k
DGND R68
84
RES/(VPP) 330
83 1 2
PA15/CK
82
PLLVSS
81 R70 U12A D+5
PLLCAP
80 74HC14
330
PLLVCC
79
R47
MD0
78
10K
MD1
77
VCC
76 TP5
NMI
75 (TP)
MD2
74 13027
EXTAL
U15 73
MD3
72 X3
XTAL
71 7MHz
SH7042 VSS
70 D0
PD0/D0
69 D1
PD1/D1
68 D2
PD2/D2
67 D3
PD3/D3
66 D4
PD4/D4
65
VCC
64 D5
PD5/D5
63 D6
PD6/D6
62 D7
PD7/D7
61
VSS
60 D8
PD8/D8
59 D9
PD9/D9
58 D10
PD10/D10
57 D11
PD11/D11
C88
0.1
C70
0.1
D+5 U19
2
1A
3
1B
5
2A
6
2B
11
3A
10
3B
14
R94 4A
D+5 13
10K
4B
/422ON 1
A/B
15
R51 G
10K R52 100
74HC157
DGND
U24C
10 SC_INT7I
8 9 8
9
C77 U12D
74HC14 74HC32 R73 R72
100p
(CHIP R)
0
R71
10k
DGND DGND
D+5
U12E
74HC14
C905
U904A
0.01
10 11 2 1
74HC04
DGND
U904B
4 3
74HC04
U904C
6 5
TP 74HC04
TP6 SELF CHECK
U904D
8 9
74HC04
DGND
TP
DGND D+5
TP7
GR J2C
L11
1 2 24
U13
R916
C73
NJM2103M 220
R48 22
0.01
2 10K
VSC
L12
OC
6 DGND 1 2 25
VSB
7 R917
VSA
220
TP4 DIN5-3 YKF51-5046
RST
1 (TP)
CT
13027
J2A
L7
1 2 4
TP3
(TP) R913
C72
220
13027 2
1/50
DGND
D+5
L8
GR 1 2 5
28MHZ
C93
0.01
U24A
DIN5-3 YKF51-5046
74HC32
MD=2 DGND
CLOCK= x4 1
3 J2B
L9
2 1 2 14
C74
R914
33p
U24B 220
D+5 12
74HC32
C75
DGND 4
L10
6 1 2 15
33p
5
R915
220
DIN5-3 YKF51-5046
DGND
DTC114EK
U12B
U21
3 4 2 3 THRU_OUT
C91
D+5
10/16
74HC14
DGND
C71
D+5
0.01
C69
DGND
0.1
R50
1K U11
5 1
VCC
RXD0 4 D5
VO
3 2
GND
PC410
4 DGND
1Y
7 DTC114EK
2Y
U14
9 TXD0 5 6 2 3
3Y
12 U12C
4Y
74HC14
J3
DGND
D+5 RXD422 1
16 TXD422 2
VCC
/422ON 3
4
D+5 5
8283M5P
C918
0.01
DGND
DGND
SC_INT7I
GR
SCSI_TMOUT
SCSI_TMOUT
27
THRU OUT
26
7
MIDI IN
6
17
MIDI OUT
16
DGND
TO
DSUB 9P