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E.F. Johnson Company Manuals
Repeater
VIKING VX
Manual
E.F. Johnson Company VIKING VX Manual page 177
Vhf ltr 25w-110w
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P1
50
51
+15V
A0 42
R17
CR1
U15F
2.2k
OPERATIONAL
13
12
4
A1 10
PO0
BLINKING
A2 41
R18
CR2
U15E
2.2k
ON = HIGH POWER
11
10
5
A3
9
PO1
OFF = LOW POWER
A4 40
R19
CR5
U15D
2.2k
ON = LTR
9
8
6
A5
5
PO2
OFF = MULTI-NET
A6 39
R20
CR4
U15C
2.2k
5
6
7
A7
7
ALARM
PO3
A8 38
CR3
R2
U15B
2.2k
3
4
8
A9
6
ALARM
PO4
A10 37
59
A11
5
NM1
R12
A12 36
10k
3
A13
4
EA
DISPLAY DRIVER
ALARM DISPLAY
A14 35
2
2
f
43
A15
3
DS1
CTS0
3
3
A16 34
g
4
1
46
A17
2
e
CTS1
5
15
U26
A18 33
d
14495L
7
4
5
48
A19
1
h+i
DMARQ0
A
8
14
6
51
31
c
B
DMAAK0
1
9
13
9
52
32
b
C
TC0
6
10
12
10
54
63
a
D
DMARQ1
CL
64
+12V
7
S2
R11
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
10k
2
5
+15V
+5V
55
R38
U15A
R34
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
+5V
19
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
+15V
+12V
HSDB+ 56
S2-16 (2)
3
1
3
U12
1
+15V IN 30
Z1
78L12
+ C17
C15
+15V IN 62
.01
2
47
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
55
58
49
10-17
MAIN MICROPROCESSOR
21
12
A0
A0
22
11
A1
A1
23
10
A2
A2
U27
24
9
A3
A3
UPD70320
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
A18
+5V
PWD
40
OE
A19
+5V
76
VTH
R14
10k
9
IC9
49
IC49
53
IC53
75
IC75
R39
270k
74
PT7
+15V
+5V
R15
10k
81
RESET
R16
10k
6
8
13
D0
D0
Vcc
RST
3
14
D1
D1
TDL
R3
15
D2
D2
U17
0
16
D3
D3
17
D4
1
D4
PBRST
S1
18
D5
D5
RESET
RESET
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
U30-1 (2)
69
PT2
INTP0
INTP1 CLK OUT
60
61
12
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
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
17
August 2000
Part No. 001-2001-200
FLASH MEMORY
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
24
31
22
A16
23
A
O0
U5
74HC154
A19
22
B
A18
21
C
G1
G2
A19
20
D
U20A
U20B
74HC00
4
1
16
O14
6
3
O11
5
2
17
O15
O13
15
5
J6
G2B
A13
1
3 DISABLE
A
G1
U4
74HC138
A14
2
2
B
Y0
A15
3
1 WATCHDOG
C
Y1
7 Y7
G2A
Y2
13
DATA BUS (7:0)
13
10
WR
11
CS
U2D
20
8
9
CLK
J3
J3
1
CP
27
D0
76800
12
MR 2
D0
1
2
O0
28
D1
D1
1
D2
38400
11
D2
3
4
O1
U21
2
D3
D3
MC14024
5
D4
19200
9
5
6
O2
D4
6
D5
D5
9600
6
7
D6
7
8
O3
D6
D7 8
D7
9
4800
5
TxC
9
10
O4
25
2400
4
RxC
11
12
O5
DSR
22
1200
3
13
14
O6
MPC SCHEMATIC (1 OF 2)
FIGURE 10-22
EPROM
11
D0
10
A0
DQ0
12
9
D1
A1
DQ1
13
8
D2
A2
DQ2
U18
15
7
D3
A3
60L256
DQ3
16
8
D4
A4
DQ4
5
17
D5
A5
DQ5
4
18
D6
A6
DQ6
5
19
D7
A7
DQ7
25
A8
24
A9
21
A10
23
A11
2
A12
26
A13
1
A14
W
G
E
20
27
22
RAM
13
D0
11
A0
DQ1
14
10
D1
A1
DQ2
15
8
D2
A2
DQ3
U28
18
8
D3
A3
DQ4
28C64
19
7
D4
A4
DQ5
20
6
D5
A5
DQ6
21
5
D6
A6
DQ7
22
4
D7
A7
DQ8
1
29
A8
28
A9
24
A10
27
A11
18
3
A12
CE
OE
WE
19
25
31
23
13
6
+5V
15
U6-10 (2)
14
U7-2 (2)
4
CLOCK
U2E
10
11
R1
10M
R4
2k
Y3
2.4575 MHz
C29
C19
62pF
62pF
FOLDOUT
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