TM 11-6625-2638-30
Table 2-3. Test Set Troubleshooting - Continued
STEP
PROCEDURE
NORMAL INDICATION
ABNORMAL INDICATION
CORRECTIVE ACTION
13
Apply + 5 vdc with probe to each of the connector pins while observing the associated lamp.
CAGE
J5-j
LED
J5-z
SCAN
J5-DD
CUE
J5-AA
J5-L
ADDRESS
UP
J4-Y
J4-X
DOWN
LEFT
J4-s
RIGHT
J4-r
Each individual lamp came on when 5 volts were applied, then went off when 5 volts were
removed.
One or more lamps did not come on or more than one lamp came on at the same time.
Replace circuit card (para 2-16).
14
a. Disconnect test lead from RCVR CURRENT jack.
b. Connect the test lead with probe to RCVR GRD jack.
15
Use probe to ground each of the following connector pins while observing while observing associated
lamp.
TRACK
J1-v
BITE
J5-h
RCVR
J1-h
ELEC
J1-LL
GO
J1-z
Each individual lamp came on when the pin was grounded, then went off when ground was
removed.
One or more lamps did not come on or more than one lamp came on at a time.
Replace circuit card (para 2-16).
16
Connect DVM to J4-N (-) and J4-L (+).
17
Set MOTOR POWER switch to LOW.
22.5 to 28.5 vdc.
0 vdc.
Continuity check wires and S19 (para 2-12).
18
Set MOTOR POWER switch to NORMAL.
22.5 to 28.5 vdc.
Continuity check wires and S19 (para 2-12).
2-8
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