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CHAPTER 3. Index
Up
TM-11-5805-387-34-2 Modem Radion Teletypewriter MD-522A/RC (NSN
Next
MODEM BENCH TEST SETUP AND TEST CONDITIONS
TM 11-5805-387-34-2
CHAPTER 3
GENERAL SUPPORT MAINTENANCE
Section I. GENERAL INFORMATION
DEATH ON CONTACT may result from contact with high voltage in modem modules. Scope
module A2 contains 1,100 volts dc; loop battery module A5 contains 127 volts dc.
3-1. GENERAL
This chapter covers general support troubleshooting, maintenance, and test procedures for the modem. Section I
lists the tools, test equipment, and materials needed to perform general support maintenance. Troubleshooting and test
procedures are described in section II. Maintenance procedures are covered in section III. General support adjustment
procedures will be the same as those for direct support (chapter 2, section IV).
3-2. REPAIR PARTS, TOOLS, TEST EQUIPMENT, AND MATERIALS
General support maintenance requires the same repair parts, tools, test equipment, and materials as for direct
support (para 2-2).
Section II. TROUBLESHOOTING
3-3. GENERAL INFORMATION
The general support troubleshooting chart supplements the direct support troubleshooting chart. Refer to chapter 2,
section II for troubleshooting definitions and procedures.
TEST POINT DATA:
Use the troubleshooting chart to isolate defective parts.
REMOVING AND REPLACING PARTS:
ADJUSTING AND ALIGNING MODULES:
NOTE
When conducting tests, investigate the possibility of intermittent troubles. Jarring or tapping the
equipment may expose this type of problem. Do not try to correct trouble this way. Check the
modem's wiring and connections to eliminate trouble caused by loose connections.
3-1

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