Table 6-3. Signal Name and Test Point List

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

Table 6-2. Troubleshooting Symptoms (Cont)

SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

Miscellaneous Indications (Cont)

LOSS OF FRAME A indi-

a. Demultiplexer input

Correct signal source.

cator lighted;

data signal missing.

equipment previously

operating normally.

b. Defective frame sync card.

Replace card.

LOSS OF FRAME A indicator Demultiplexer port strap-

Correct port strapping

lighted immediately

ping not same as trans-

error.

following equipment

mitting multiplexer

reconfiguration.

port strapping.

Table 6-3. Signal Name and Test Point List

Signal Name

Function

Test Point

NOTE

To locate a signal name prefixed by M (multiplexer) or D (demultiplexer),

delete the prefix and locate the remainder of the signal name. For example,

signal MNSE- is listed as NSE-, etc.

ACFANH

Fan ac (hot)

ACFANN

Fan ac (neutral)

ACINH

AC input (hot)

ACINN

AC input (neutral)

ACPSH

Power supply ac (hot)

ACPSN

Power supply ac (neutral)

ATA

Demux input data

ATA-

Demux input data

CHAD 1

Channel address 1 (binary 1)

M/D21-10

CHAD 2

Channel address 2 (binary 2)

M/D21-11

CHAD 4

Channel address 4 (binary 4)

M/D21-12

CHAD 8

Channel address 8 (binary 8)

M/D21-13

See footnote at end of table.

6-9