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Page Title:
FREQUENCY SELECTION CODE TABLES |
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|  TM 11-5820-670-30
2-26. TROUBLESHOOTING CHARTS. (CONT)
CHART 2-24
Control Unit Troubleshooting
(Sheet 9 of 12)
FREQUENCY SELECTION CODE TABLES
The tables in this section indicate the pins of J9101 that are grounded and the pins that are not
grounded for each setting of the frequency selector switches. The grounded pins are indicated by zero
resistance in the tables, and the ungrounded pins by INF (infinite) resistance. Pin G is grounded for
all frequency settings from 30.00 to 52.00 MHz, pin J is grounded for all settings from 53.00 to 75.00
MHz, pin H is grounded for all settings from 30.00 to 49.00 MHz, and pin g is grounded for all settings
from 50.00 to 75.00 MHz.
TABLE
Resistance Measurements for KC Tuning Control Lines
RESISTANCE TO GROUND FOR
CONNECTOR J9101 PIN N NUMBER
LAST TWO DIGITS OF
P
R
S
T
U
FREQUENCY SELECTED
INF
INF
INF
0
00
0
INF
INF
INF
05
INF
0
INF
INF
10
INF
INF
0
INF
15
INF
INF
INF
0
INF
INF
INF
0
INF
20
INF
INF
INF
INF
25
0
INF
INF
INF
0
30
0
INF
INF
0
INF
0
35
INF
40
INF
INF
0
0
45
INF
0
INF
0
0
INF
0
INF
50
0
0
INF
INF
55
0
0
0
INF
60
INF
0
0
0
INF
0
0
0
0
65
70
0
0
INF
0
0
INF
0
75
0
0
0
INF
0
0
80
0
0
0
0
0
85
INF
0
90
0
INF
INF
0
0
0
INF
INF
95
INF
0
2-122
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