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Page Title:
Table 4-3. Checkout/Troubleshoot the Antenna Coupler CU-2229/URC -92--Continued |
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|  TM 11-5820-873-34
Table 4-3 Checkout/Troubleshoot the Antenna Coupler CU-2229/URC- 92-Continued
STEP
ACTION
INDICATION
NEXT STEP
124
Check relay 2K4 coil and contacts for proper
Relay checks good
Yes: step 139
operation.
No: replace relay 2K4
125
Check resistor 2R9.
Resistor checks good
Yes: step 139
No: replace resistor 2R9
126
Check components 2A3AC6, 2A3AL6 and
Components check good
Yes: step 139
2A3AC19.
No: replace faulty
component
127
Check bistable relay 2A5K1 coil and contacts for
Bistable relay checks good
Yes: step 139
proper operation.
No: replace bistable
relay 2A5K1.
128
Check bistable relay 2A5K2 coil and contacts for
Bistable relay checks good
Yes: step 139
proper operation.
No: replace bistable
relay 2A5K2
129
Check Amplitude Detector Adjustment.
Amplitude Detector Is within tolerance
Yes: step 130
No: step 135
130
Check Phase Detector Adjustment.
Phase Detector adjusts to within tolerance
Yes: step 131
No: step 136
131
Set mode switch to OFF Remove Control Logic
Meter indicates 10 ohms or less
Yes: step 132
CCA 2A1 Disconnect control cable at Antenna
No: step 137
Coupler Connect multimeter between 2P1-P and
2XA1-8.
132
Connect multimeter between 2XA1-8 and
Meter indicates 1000 ohms or more
Yes: step 133
ground.
No: step 137
133
Connect multimeter between 2P1-g and
Meter indicates 1000 ohms or more
Yes step 134
2XA1-9.
No: step 138
134
Connect multimeter between 2XA1-9 and
Meter indicates 1000 ohms or more
Yes. step 136
ground
No: step 138
135
Perform Amplitude Detector Adjustment
Amplitude Detector adjusts to within tolerance
Yes: step 6a
No: step 139
136
Perform Phase Detector Adjustment
Phase detector adjusts to within tolerance
Yes step 6a
No: step 139
137
Check components 243AC6, 2A3AL6 and
Components check good
Yes: reinstall re
2A3AC19 for opens, shorts and shorts to ground
moved com-
ponents; go to
step 139
No: reinstall removed
components;
replace faulty
component.
138
Check components 2A3AC2, 2A3AL2 and
Components check good
Yes: reinstall re-
2A3AC23 for opens, shorts and shorts to ground
moved com-
ponents; go to
step 139
No: reinstall removed
components;
replace faulty
component.
139
Repair and/or replace wiring and connectors as
---
necessary
140
Replace and/or repair Control Logic CCA 2A1.
---
Use conventional troubleshooting methods for
CCA repair
141
Replace and/or repair Phase and Amplitude CCA
---
2A2. Use conventional troubleshooting methods
for CCA repair
142
Replace and/or repair Servo Control Assy 2A6
---
Use conventional troubleshooting methods for re-
pair
143
Replace and/or repair Phase and Amplitude Assy
---
2A4. Perform Amplitude Detector Adjustment
and Phase Detector Adjustment Use conven-
tional troubleshooting methods for repair
144
Replace and/or repair Regulator CCA 2A3. Use
---
conventional troubleshooting methods for repair
4-31
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