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TM 11-5820-890-30-5
Section IV. MAINTENANCE PROCEDURES
Subject
Para
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Replacement of Recovers.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Replacement of Modules 1A2, 1A6, 1A7, 1A12, 1A13, 1A14, and 1A15 . . . . . . . . . . . . . 2-36
Replacement of impedance Matching Network (1A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Replacement of Power Supply (1A3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Replacement of ECCM Module (1A5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39
Replacement of Control Module (1A4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Replacement of lF/Demodulator (1A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41
Replacement of Tuner/Mixer (1A9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42
Replacement of Synthesizer (1A10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Replacement of Exciter/Power Amplifier (1A11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
Replacement of RF Cables 1W1 through 1W5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Replacement of RT Chassis (1A16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
Replacement of Data Entry Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
Replacement of Threaded Screw Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48
Replacement of RT Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49
Replacement of Display Circuit Card Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Replacement of Audio Flex Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Replacement of Switch Flex Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52
Replacement of Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-53
Replacement of Observation Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
2-32. GENERAL.
Page
2-158
2-158
2-158
2-159
2-160
2-162
2-163
2-164
2-165
2-166
2-167
2-168
2-169
2-170
2-171
2-173
2-175
2-177
2-181
2-182
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2-182
This section includes the operational check and the repair procedures. The operational check is used to verify
the operation of a repaired RT. It is also used to verify the symptom of a faulty RT. It will identify the
troubleshooting chart to be used. When a bad module is identified, replace it using the procedures in this
section.
2-33. OPERATIONAL CHECK.
Perform the operational check in paragraph 2-29 (page 2-30) to verify correct RT operation.
2-34. REPAIR PROCEDURES.
Repair of the RT consists of replacing a bad module. A module is replaced by removing it and installing a good
module. Procedures for doing this follow.
a.
General Instructions.
The following instructions apply to all repair tasks.
1.
Set RT FCTN switch to STW.
2.
Remove any cables connected to the RT.
3.
inspect the RT for damage. Repair any obvious physical damage.
4.
Use the module extractor to remove the circuit card assemblies. It is included in the maintenance
tool kit. It is used as follows:
a)
Locate the module to be removed.
b) Hook the module extractor through the two holes in the top corners of the module.
c) Hold the module extractor with one hand. Place the other hand on the RT with the fingers of that
hand resting on top of the module to be removed.
d) Pull steadily with the module extractor until the module connector is free of the parent board.
e)
Remove the module.
f)
Unhook the module extractor from the module.
2-158
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