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TM 11-5820-890-30-5
9-2.
POWER SUPPLY. Continued
These outputs are short-circuit protected. The power supply will not be damaged if an output is shorted to
ground.
9-3.
PA MOUNT CHASSIS.
The PA mount chassis provides the interconnections as shown in figure 9-1. Several other functions are also
performed. The power input is switched on and off by CB1. EMP protection is provided by CR1, VR1, and VR2.
Lamp DS1 indicates when power is applied to the power amplifier.
Section Il. REPAIR PARTS, SPECIAL TOOLS, TMDE,
AND SUPPORT EQUIPMENT
9-4.
COMMON TOOLS AND EQUIPMENT.
For authorized common tools and equipment, refer to the Modified Table of Organization and Equipment (MTOE)
applicable to your unit.
9-5.
SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT.
For the TMDE and support equipment required for DS, see the maintenance allocation chart. It is Appendix B in
TM 11-5820-890-20-2.
9-6.
REPAIR PARTS.
Repair parts are listed and illustrated in the repair parts and special tools list (TM 11-5820-890-30P-3) covering
direct support maintenance for this equipment.
Section Ill. TROUBLESHOOTING PROCEDURES
Subject
Para
Page
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
9-3
Operational Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
9-4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
9-7
Test Precautions and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
9-8
Explanation of Symbols and Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
9-8
Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
9-9
9-7.
GENERAL.
This section provides the troubleshooting procedures used to isolate a defective PA mount. The troubleshooting
information is presented in the form of flow charts. They systematically get from a symptom to the bad module.
9-3
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