NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
ejector and lift up until board pops
out of receptacle at back of status
processor. Then grasp PC board
and pull straight out.
To install new PC board, turn board so
plastic ejector is toward top. Align
board with guides at top and bot-
tom of status processor. Slide
board straight in until it contacts
receptacle at back of processor.
Then press firmly on board until it
seats completely in receptacle.
Turn on switch S1 on power supply.
Depress TRANSMITTER RESYNC
switch S2. Wait about 5 minutes
for system to stabilize. During
5-minute stabilization period, check
power supply. Set multimeter to
dc volts and connect negative lead
to chassis (ground). Connect posi-
tive lead to power supply, TB2-3.
Meter should indicate 20 + 1 vdc.
Connect positive lead to TB2-5.
Meter should indicate 5 ±0.25 vdc.
Connect lead to TB2-2. Meter
should indicate 28 2 vdc. Turn
mode switch to TEST/RESET and
then to SECURE.
b. Bad tamper
Tag, remove, and isolate Data Transmitter
or Monitor Cabinet wires from TB6,
terminals S1-D and S1-DR.
Set multimeter to dc volts and connect posi-
tive meter lead to PC board A7-TP1
(brown), and negative lead to chassis
(ground). Push TAS plunger all the
way in, and then pull plunger all the
way out. Meter should indicate less
than 0.6 vdc for both switch positions.
Depress TAS plunger and then release.
Meter should indicate 18.5 to 21 vdc.
If these meter indications are not correct,
turn off switch S1 on top of power
supply. Use board ejector to remove