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Page Title:
Table 4-2. Checkout/Troubleshoot the Receiver-Transmitter RT-1277/URC-92 (cont) |
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|  TM 11-5820-873-34
Table 4-2. Checkout/Troubleshoot the Receiver-Transmitter RT-1277/URC-92--Continued
STEP
ACTION
INDICATION
NEXT STEP
Frequency Switch Checks (Continued)
3
0
0
1
1
4
0
1
0
0
5
0
1
0
1
6
0
1
1
0
7
0
1
1
1
8
1
0
0
0
9
1
0
0
1
187
Set mode switch to LSB. Using multimeter
Display checks are good.
Yes: step 288
between ground and pin indicated, perform dis-
No: step 188
play checks as shown below.
NOTE
0 = 0.8 V or less
1 = 2-5 V
Display Checks
Display
Readout
1A1A2J1
Indication
Pin 1
Pin 7
Pin 5
Pin 6
Pin 3
Pin 4
00.0000
0
0
0
0
0
1
11.1111
1
0
0
1
1
1
22.2222
0
0
1
0
1
0
1A1A2J1
Pins
Pins
Pins
Pins
Pins
Pins
Pins
Display
10, 18,
14, 20,
12, 21,
13, 22,
8, 15,
9, 17,
11, 19
Readout
27, 34,
29, 36,
25, 32,
28, 35,
23, 31,
26, 33,
24, 30
Indication
39
43
41
40
37
38
42
0.0000
0
0
0
0
0
0
1
1.1111
1
0
0
1
1
1
1
2.2222
0
0
1
0
0
1
0
3.3333
0
0
0
0
1
1
0
4.4444
1
0
0
1
1
0
0
5.5555
0
1
0
0
1
0
0
6.6666
1
1
0
0
0
0
0
7.7777
0
0
0
1
1
1
1
8.8888
0
0
0
0
0
0
0
9.9999
0
0
0
1
1
0
0
188
Set mode switch to OFF. Using a multimeter be-
Frequency switch checks are good.
Yes: step 289
tween ground and pin indicated, perform fre-
No: step 285
quency switch checks as shown below.
NOTE
0 = 500 ohms or more
0 = 0 ohms
Frequency Switch Checks
10 MHz Switch Setting
1A1J5
(A or B)
Pin 18
Pin 17
Pin 19
0
0
1
1
1
1
0
1
2
1
1
0
1 MHz Switch Setting
1A1J5
(A or B)
Pin 21
Pin 22
Pin 23
Pin 20
0
1
0
0
1
1
1
0
0
0
2
0
1
1
1
3
0
1
1
0
4
0
1
0
1
5
0
1
0
0
4-13
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