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Viking Manuals
Repeater
242-2009-632
Service manual
Main Processor Card Schematic (1 Of 2) - Viking 242-2009-632 Service Manual
900 mhz ltr-net 75w-160w repeater
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Contents
Table of Contents
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P1
50
51
+15V
CR1
A0 42
R17
U15F
2.2k
13
12
4
A1 10
PO0
CR2
A2 41
R18
U15E
2.2k
11
10
5
A3
9
PO1
CR5
A4 40
R19
U15D
2.2k
9
8
6
A5
5
PO2
CR4
A6 39
R20
U15C
2.2k
5
6
7
A7
7
PO3
CR3
A8 38
R2
U15B
2.2k
3
4
8
A9
6
PO4
A10 37
59
A11
5
NM1
R12
A12 36
10k
3
A13
4
EA
ALARM DISPLAY
DISPLAY DRIVER
A14 35
2
2
f
43
A15
3
DS1
CTS0
3
3
A16 34
g
4
1
46
A17
2
e
CTS1
U26
5
15
A18 33
dd
14495L
7
4
5
48
A19
1
h 1
A
DMARQ0
8
14
6
51
31
cc
B
DMAAK0
1
9
13
9
52
32
bb
C
TC0
6
10
12
10
54
63
aa
D
DMARQ1
CL
64
+12V
R11
S2
1.2k
9
8
R10
200
10
7
R9
1
45
R
RXD1
1.2K
U24
SN65176B
6
4
47
IRDB+ 25
A
D
TXD1
7
3
63
IRDB- 57
B
DE
INT POLL
RE
GND
R29
2
5
10k
+15V
+5V
55
R38
R34
U15A
58
20k
10k
74C906
1
2
10
LPTT 21
PO5
44
RNT TX DATA 22
TXD0
41
RNT RX DATA 23
RXD0
U6-9 (2)
U7-1 (2)
84
MSTB 16
MSTB
U6A
U20C
74HC32
9
1
8
3
10
83
READ 47
R/W
2
U6B
5
2 MREQ
6
WRITE 48
4
R31
R30
10k
10k
MREQ 15
19
+5V
20
54
18
D0 46
D1 14
D2 45
D3 13
D4 44
D5 12
D6 43
D7 11
HSDB- 24
S2-15 (2)
SOURCE
SOURCE
HSDB+ 56
S2-16 (2)
+15V
+12V
U12
3
1
3
1
+15V IN 30
Z1
78L12
C15
+ C17
+15V IN 62
.01
47
2
2
49
17
SOURCE
-5V IN 27
-5V
-5V IN 59
SOURCE
+5V IN 28
+5V
3
1
+5v IN 29
Z2
C16
+ C18
+5V IN 61
.01
47
2
+5V IN 60
52
C4
C5
C6
C7
C10
C11
C12
C20
C21
53
.01
.01
.01
.01
.01
.01
.01
.01
.01
55
58
49
10-27
MAIN MICROPROCESSOR
FLASH MEMORY
21
12
A0
A0
22
11
A1
A1
23
10
A2
A2
U27
24
9
A3
A3
MPD70320L-5
25
8
A4
A4
26
7
A5
A5
27
6
A6
A6
28
5
A7
A7
29
27
A8
A8
30
26
A9
A9
31
23
A10
A10
32
25
A11
A11
33
4
A12
A12
34
28
A13
A13
35
29
A14
A14
36
3
A15
A15
37
2
A16
A16
38
A17
39
30 PW
A18
+5V
D
OE
40
A19
24
+5V
76
VTH
R14
10k
9
IC1
49
IC2
53
IC3
75
IC4
R39
270k
74
PT7
+15V
CR6
4.7V
+5V
R15
10k
81
RESET
R16
10k
6
8
13
D0
D0
Vcc
RST
14
D1
3
D1
TDL
R3
15
D2
D2
U17
0
16
D3
D3
17
D4
1
D4
PBRST
S1
18
D5
D5
RESET
RESE
T
19
D6
D6
D7 20
D7
2
TD
78
7
X1
ST
Y1
C8
5
RST
10 MHz
10pF
GND
79
X2
4
C1
10pF
P06 11
U9-27 (2)
PT0 67
U9-3 (2)
68
PT1
U10-25 (2)
66
READY
U19-2 (2)
64
TOUT
U19-4 (2)
69
PT2
INTP0
INTP1 CLK OUT
60
61
12
13
21
RESET
RD
U22
82C51
12 C1 D
14
RxRDY
18
TxE
U16F
145406
J1
6
11
MODEM DCD 4
U16C
3
14
19
COMPUTER RX 3
TxD
U16D
4
13
3
COMPUTER TX 2
RxD
1
C22
C23
C26
C30
C31
C32
C24
C25
C27
C28
CTS
DSR
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
17
March 1999
Part No. 001-2009-600
13
D0
DQ0
14
D1
DQ1
U25
15
D2
DQ2
28F001BX
17
D3
DQ3
18
D4
DQ4
19
D5
DQ5
20
D6
DQ6
DQ7 21
D7
1
Vpp
J2-2 (2)
WE
CE
31
22
A16
23
1
A
O0
U5
74HC154
A19
22
B
A18
21
18
C
G1
19
G2
A19
20
D
U20A
U20B
74HC00
4
1
16
6
3
O14
13
O11
5
2
17
O15
O13
15
5
J6
G2B
A13
1
6
3 DISABLE
A
G1
U4
74HC138
A14
2
15
2
B
Y0
A15
3
14
1 WATCHDOG
C
Y1
7 Y7
G2A
Y2
13
DATA BUS (7:0)
10
WR
11
CS
CLOCK
U2D
20
8
9
10
1
J3
J3
CLK
27
D0
76800
12
RESET 2
D0
1
2
2
R4
28
D1
D1
2k
38400
11
1
D2
D2
3
4
2
U21
2.4575 MHz
2
D3
MC14024
D3
C29
19200
9
5
D4
2
D4
5
6
62pF
6
D5
D5
7
D6
9600
6
7
8
2
D6
D7 8
D7
9
4800
5
TxC
9
10
2
25
2400
4
RxC
11
12
2
22
1200
3
13
14
2
EPROM
11
D0
10
A0
I/O1
12
9
D1
A1
I/O2
13
8
D2
A2
I/O3
U18
15
7
D3
A3
I/O4
60L256
16
8
D4
A4
I/O5
17
5
D5
A5
I/O6
18
4
D6
A6
I/O7
19
5
D7
A7
I/O8
25
A8
24
A9
21
A10
23
A11
2
A12
26
A13
1
A14
R/W
OE
CE
20
27
22
RAM
13
11
D0
A0
DQ1
10
14
D1
A1
DQ2
8
15
D2
A2
DQ3
U28
8
18
D3
A3
DQ4
28C64
7
19
D4
A4
DQ5
6
20
D5
A5
DQ6
5
21
D6
A6
DQ7
4
22
D7
A7
DQ8
29
A8
28
A9
24
A10
27
A11
3
A12
CE
OE
WE
23
25
31
+5V
U6-10 (2)
U7-2 (2)
U2E
11
R1
10M
Y3
C19
62pF
MAIN PROCESSOR CARD SCHEMATIC (1 OF 2)
FIGURE10-32
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