TM 11-5805-386-34/nAVELEX 0967-466-1020
Corrective action
Probab/e cause
Malfunction
a. Press ACCESS pushbutton and check
a. ACCESS pushbutton
7. 2600-Hz release
continuity; replace, if defective.
defective.
tone not cent.
b. Replace logic board A1A2.
b. Logic printed wiring
board A1A2 defective.
Replace logic board A1A2.
Ringback gate circuit
8. 4-wire sub-
inoperative.
scriber(s) indi-
cates ring back
not received
when seizing
channel.
Access jack defective or
9. No voice trans-
then ineert operator's plug into
voice gate on logic printed
mission from
second jack; if there is still no
wiring board A 1A2.
2-wire to 4-wire
communication, replace logic board
circuit, but
A1A2.
transmission
6. If using second jack establishes
occurs from 4-
communication, replace first jack.
wire to 2-wire
circuit .
a. Accees jack defective.
10. No Voice trans-
then check `channel module jack for
mission from 4-
faulty contact.
printed wiring board
Wire to 2-wire
b. Replace logic board A1A2.
A1A2 defective. l
circuit , but
transmission
occurs from 2-
wire to 4-wire
circuit.
Figure 2-10. Operational performance test.
2-16
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