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Page Title:
Table 3-3. Checkout/Troubleshoot the Antenna Coupler CU-2229/URC-92-Continued |
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|  TM 11-5820-873-34
Table 3-3. Checkout/Troubleshoot the Antenna Coupler CU-2229/URC-92-Continued
STEP
ACTION
INDICATION
NEXT STEP
12
Set mode switch to OFF Remove Control Logic
CCA 2A1 Set mode switch to AM
CAUTION
When testing on or jumpering connector con-
tacts, take care not to short adjacent contact
Jumper 2XA1-7 to ground
Transmitter keys on
Yes: step 37
No: step39
13
Set mode switch to OFF Remove Control Logic
CCA 2A1 Set mode switch to CPLR TUNE KW
CAUTION
When testing on or jumpering connector con-
tacts, take care not to short adjacent contacts
Jumper2XAl-6toground
COUPLER STATUS TUNING indicator
Yes: step37
Illuminates.
No: step 39
14
Set frequency to 1.802 MHz. Depress TUNE
Both drive motors, 2M1 and 2M2, drive.
Yes: step 3b
START
No: step 1l
15
Drive motor 2M1 drives.
Yes: step 16
No: step 23
16
Set mode switch to OFF. Remove Phase and
Amplitude CCA 2A2
CAUTION
When testing on or jumpering connector con-
tacts, take care not to short adjacent contacts
CAUTION
Insure roller on 2L4 is positioned near center of
travel before beginning the following checks
NOTE
For steps requiring jumpers, remove jumper be-
fore motor drives to end step
Set mode switch to AM. Momentarily jumper
Motor 2M2 rotates clockwise (viewed from shaft
Yes: step 17
2XA2-V to ground.
end).
No: step 39
17
Momentarily jumper 2XA2-17 to ground
Motor 2M2 rotates counterclockwise
Yes step 18
No: step 39
18
Connect VTVM between 2XA2-U and ground
Meter indicates + 10 VDC + 0.8 VDC
Yes step 19
No: step 39
19
CAUTION
Ensure VTVM is isolated from ground
Connect VTVM between 2XA2-16 and 2XA2-U
Meter indicates a voltage difference(+ or -)
Yes: step 20
No: step 39
20
Set mode switch to CPLR TUNE KW
Connect Meter indicates + 3 VDC to + 5 VDC
Yes: step 21
VTVM between 2XA2-14 and ground. Depress
No: step 39
and hold TUNE START
21
Set mode switch to OFF. Connect multimeter
Meter indicates 200 ohms or more
Yes: step 22
between 2XA2-7 and ground
No: step 39
22
Connect multimeter between 2XA2-15 and
Meter indicates 1000 ohms or more
Yes: step 35
ground
No: step 39
23
Drive motor 2M2 drives
Yes: step 24
No: step 30
24
Set mode switch to OFF. Remove Phase and
Amplitude CCA 2A2
CAUTION
When testing on or jumpering connector con-
tacts, take care not to short adjacent contacts
Ensure the 2C1 sensor bar is positioned near cen-
ter of travel before beginning the following
checks
NOTE
For steps requiring jumpers, remove jumper
before sensor contacts micro switches
Set mode switch to AM. Momentarily jumper
Motor 2M1 rotates clockwise (viewed from shaft
Yes: step 25
2XA2-4 to ground
end)
No: step 39
25
Momentarily jumper 2XA2-5 to ground
Motor 2M 1 rotates counterclockwise
Yes: step 26
No: step 39
26
Connect VTVM between 2XA2-3 and ground
Meter indicates + 10 VDC + 0.8 VDC
Yes step 27
No: step 39
3-14
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