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Viking Manuals
Repeater
242-2009-632
Service manual
Main Processor Card Schematic (2 Of 2) - Viking 242-2009-632 Service Manual
900 mhz ltr-net 75w-160w repeater
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Contents
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Table of Contents
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U8C
MSTB
9
J1-16 (1)
8
10
U6-15 (1)
U27-67 (1)
U27-11 (1)
+12V
R7
1.2k
3
R6
200
4
R8
1.2k
+5V
20
Vcc
U32A
2
HSDB-
A0
74CT244
P1-56 (1)
4
10
A1
GND
6
HSDB+
18
A2
B2
P1-24 (1)
8 A3
16
C2
S3
14
D2
1 OE
12
5
4
16
E1
R40
15
8
1
15
U30B
U31C
U2F
3
4
8
10
13
12
2
7
5
9
R28
4.7k
3
6
+5V
R13
R5
150
150
19
+5V
OE
11
9
A0
Y0
+15V
U32B
74ACT244
13
7
A1
Y1
+5V
15
5
A2
Y2
100k
17
3
R26
A3
Y3
10k
U27-66 (1)
U31A
U30A
R23
74ACT02
4.7k
74ACT1
2
1
2
1
3
4
U27-64 (1)
R27
R22
10k
10k
U20D
12
11
13
V25 DATA BUS (7:0)
TX FIFO
4
S1
3
24
A0
DIR
Q0
23
A1
Q1
27
22
A2
MR
Q2
D0
5
21
A3
D0
Q3
U9
74HC7030
D1
6
20
A4
D1
Q4
D2
7
19
A5
D2
Q5
D3
8
18
A6
D3
Q6
D4
9
17
A7
D4
Q7
U6D
D5
10
D5
U2B
12
11
26
4
3
SD
D6
11
13
D6
D7
12
15
D7
DE
25 DO
R
D8
13
HSDB
MICROPROCESSOR
18
17
P3-8
P3-7
2 P1-1
1
P1-0
S2
14
A0
39
3
PD0
P1-2
A1
38
PD1
13
A2
37
21
A8
PD2
P2-0
P2-
A3
36
22
A9
PD3
1
A4
35
23
A10
PD4
P2-2
A5
34
24
A11
PD5
P2-3
A6
33
25
A12
PD6
P2-4
A7
32
26
A13
PD7
27
A14
P2-6
+5V
+5V
28
A15
P2-7
8
R35
U13
3.9k
TP8052AH2
Vcc
U16B
1
7
3
15
2
4
B
DE
P1-3
U23
65176
2
6
31
A
EA
12
1
4
11
9
R
D
P3-1
RST
U17-6 (1)
GND RE
5
2
10
P3-0
29
PSEN
30
ALE
U31B
U30C
5
XTAL1
XTAL2
6
5
4
Y2
6
19
18
11.059 MHz
SOURCE
Q2
+12V
3812
U11
J2
C2
3
78L12
1
20pF
Y4
1 FLASH
12 MHz
R21
R25
10k
2
C13
U25-1 (1)
2
20pF
R24
4.7k
+5V
3 EPROM
Q3
1300
U7B
5
4
RAM
22
27
OE
WE
A0
11
21
IO1
A8
A1
12
22
IO2
A9
A2
13
23
IO3
U1
A10
HM6264LP-15
A3
15
24
IO4
A11
ADDRESS
A4
16
25
IO5
A12
SELECT
13
14
A5
17
10
IO6
A0
Y1
Y2
A13
1
A6
18
9
A
IO7
A1
U3
A14
2
74HC138
A7
19
8
B
IO8
A2
A15
3
15
20
7
C
A3
Y0
CS1
4
6
G2A
A4
5
5
G2B
A5
G1
26 CS2
4
+5V
A6
6
3
A7
+5V
ADDRESS/DATA BUS (15:8)
J5
1 MULTI-SPEED
2 CRYSTAL OUT
3 LTR SPEED
March 1999
Part No. 001-2009-600
U7A
74HC32
U2C
1
3
5
6
2
U4-14 (1)
RX FIFO
15
DE
A0
5
26
D0
SD
A1
6
24
D0
D1
Q0
A2
7
23
D1
D2
Q1
A3
8
22
D2
D3
Q2
U10
A4
9
74HC7030
21
D3
D4
Q3
A5
10
20
D4
D5
Q4
A6
11
19
D5
D6
Q5
A7
12
18
D6
D7
Q6
27
17
D7
MR
Q7
3
25
DOR
U27-68 (1)
DIR
13
U2A
D8
6
1
2
4
SI
EPROM
A8
A0
11
25
IO1
A8
A9
A1
12
24
IO2
A9
A10
A2
13
21
IO3
A10
A11
A3
15
23
IO4
A11
U14
A12
A4
16
27C256A
2
IO5
A12
D0
A5
17
26
IO6
A13
D1
A6
18
IO7
D2
A7
19
IO8
J4
D3
D0
5
D0
1
2
D4
D1
6
D1
D5
D2
7
27
D2
A14
3
LTR
4
D6
D3
8
D3
D7
D4
9
D4
5
MN
6
D5
10
D5
D6
11
20
D6
CE
D7
12
D7
OE
22
ADDRESS BUS (7:0)
MAIN PROCESSOR CARD SCHEMATIC (2 OF 2)
FIGURE 10-33
10-28
LOWER ADDRESS LATCH
A0
D0
2
19
D1
Q1
A1
3
18
D1
Q2
D2
U8
A2
74HC573
D2
4
17
Q3
D3
A3
5
16
D3
Q4
D4
A4
D4
6
15
Q5
D5
A5
7
14
D5
Q6
D6
A6
8
13
D6
Q7
D7
A7
12
D7
9
D8
Q8
OC
C EN
1
11
A8
A9
A10
A11
A12
A13
J4
A14
+5V
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