TM 11-5841-287-30
CHAPTER 3
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Section I. GENERAL
3-1.
Introduction
WARNING
Maintenance instructions presented in this chapter apply
Be careful when 115 V ac is applied to
primarily to Encoder, Video KY-8651AKT-18B (encoder)
the equipment Serious injury or DEATH
and Control, Data Link C-10546/AKT-18B (data link
may result from contact with terminals
control) Maintenance Instructions for Radio Set AN/ARC-
carrying this voltage
164(V) 16 (uhf radio set) are given In TM 11-5841-286-
13 The following maintenance duties are assigned to
CAUTION
direct support maintenance personnel:
When making resistance measurements
a. Testing encoder, datalink control, and uhf
en-sure that power is removed from the
radio set to localize trouble to a faulty subassembly or
unit being tested Failure to comply may
chassis-mounted part
result in erroneous readings or in
b. Replacing of faulty subassemblies or
damage to the equipment.
chassis-mounted parts
c. Performing power supply and overvoltage
All procedures for making voltage and resistance
protector adjustments
measurements are contained in the troubleshooting
d. Repairing of filter assembly 2FL1
procedures (section II)
3-2.
Voltage and Resistance Measurements
3-3.
Waveform Measurements
All procedures for making waveform measurements are
contained in the troubleshooting procedures (section III)
Section II. TOOLS AND EQUIPMENT
3-4. Tools and Test Equipment Required
The tools and test equipment required for direct support maintenance are listed below
Test equipment
Technical manual
Common name
Multimeter ANfUSM-223
TM 11-6625-654-14
Oscilloscope AN/USM-281C
TM 11-6625-2658-14
Digital Voltmeter AN/GSM-64B
TM 11-6625-444-14-1
Digital voltmeter (DVM)
Power Supply PP-3940A/G
TM 11-6130-247-15
Low voltage power supply (LVPS)
Tool Kit, Electronic EquipmentTK-
SG 5180-91-CL-S21
TK-10O/G
100/G
Tool Kit, Electronic Equipment TK-
SG 5180-91-CL-R07
TK-105/G
105/G
Test Set, Electronic Systems ANIUKM- TM 11-6625-2937-13
Test set group
5
3-5. Materials Required
The materials required to perform direct support maintenance are listed m appendix B
Section III. TROUBLESHOOTING
procedure, a troubleshooting table, and additional data
3-6.
General
as required Malfunctions listed in the troubleshooting
This section contains information to aid in the direct
table are assumed to occur during testing of the data
support troubleshooting of the data transmitting set and
transmitting set or its subassemblies The entire test
each repairable subassembly The troubleshooting
procedure should be repeated after repair to make sure
procedure comprises a list of tools and test equipment
that the malfunction was corrected
required, a test setup diagram, a functional test
Change 1 3-1
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