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Section II. TROUBLESHOOTING
Up
TM-11-5805-387-34-2 Modem Radion Teletypewriter MD-522A/RC (NSN
Next
TEST EQUIPMENT
TM 11-5805-387-34-2
REMOVING AND REPLACING PARTS:
Refer to section III
ADJUSTING AND ALIGNING IODULES:
Refer to section IV
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.
2-4. MODEM BENCH TEST SETUP AND TEST CONDITIONS
Perform all checks in the troubleshooting chart with the equipment connected as shown below.
Make sure that all the modem's modules are secure in the chassis.
Read all instructions carefully before starting the tests, so you will understand what is to be
accomplished.
POWER CONNECTIONS
Use Power Supply PP-3940/G or an equivalent dc power source for all electrical servicing and test procedures.
The power source must supply + 27 volts dc at 2.6 amperes with less than 1 volt root-mean-square (rms) ripple.
2-5

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