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RUN SELF TEST
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TM-11-7025-234-23 Modem Unit MD-1149/MYQ-4A Manual
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CHAPTER 4 DIRECT SUPPORT MAINTENANCE INSTRUCTIONS

TM 11-7025-234-23
3-12. RUN SELF TEST (CONT)
8. Press AUD BUS, then DATA CLAMP so
both remain depressed.
9. Observe CONTROL indicators. They
should read as follows:
GOOD DATA on `
TEST on (blinking)
MARG CKT off
CARR LOSS off
XMT DATA off
RCV DATA off
o If any indicators read
differently, test fails and
maintenance is required
10. Press DATA CLAMP and AUD BUS to off.
11. Press MDM CHK and then DATA CLAMP
until both remain depressed.
12. Observe control indicators. They
should read as follows:
TEST on (blinking)
GOOD DATA on
CARR LOSS off
XMT DATA off
RCV DATA off
q If
any indicators show a
difference in indication,
maintenance is required
13. Press MDM CHK and DATA CLAMP to OFF.
14. Close front panel cover.
3-4

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