TM 11-6625-1696-12
5-6. Organizational Quarterly Preventive Maintenance Checks and Services Chart-Continued
Seq
Item
Procedure
Reference
No.
b. Set S6 to OSC and check to see that SYNC indicator
16
(Cont.)
lights.
c. Set S8 to all positions from 47.50 to 72.50 and check
Para 5-8b, items
to see that SYNTHESIZER section indicator lights and23 and 24.
SYNC indicator does not light.
d. Set S5 to position S6. Set S8 to all positions from ....
47.50 to 72.50 and check to see that meter M1 indicates
between 30 and 80 in all positions.
e. Set S6 to DBLR. Set S8 to all positions from 47.50 to
Para 5-8b, item
26.
72.50 and check to see that meter M1 indicates between 30
and 80 in all positions.
f. Set S6 and S8 to OFF. Disconnect RF cable assembly
termination and adapter (a above).
17
ELECTRONIC SWITCH
a. Connect J50 to J51 with cable assembly 457-574. Set
section.
S5 to position S17.
b. Observe meter M1 as S17 is set to the positions........
shown.
Sw Sl7pos
Meter indication
+12V ...................................... Green band.
-12V. ...................................... Green band.
100 V ...........................................30 to 50.
200 V ..................................... Green band.
6 V .......................................... Green band
c. Set S17 to ALARM TEST, set S18 to NORMAL, and ..
Para 5-8b, items
disconnect the cable assembly (a above). ..........27 and 28.
18
Power section................
Set S1 to OFF.
RADIO FREQEUNCY MODULES FACILITY
TS-3837(V)2/GRM-95(V)2
19
REGULATOR VOLTAGE
a. Connect Lambda LK342-FM power supply to J1 (+)
section.
and J2 (-), using test lead 276-800020-000 (3 ft).
b. Set power supply output to + 13 volts 1 volt.
c. Set S1 to ON; SUPPLY indicator should light.............
d. Connect multimeter to J7 pins 2 (+) and 10 (-).
e. Set S4 to OFF, S5 to 0 OHM and S2 to 6.4 V.
f. Press and hold S6; the multimeter should indicate 6.4
V dc.
g. Set S2 to 7.2 V and 8.0 V alternately, the multimeter .
should indicate 7.2 V dc 2 V and 8.0 V dc 0.2 V
respectively.
h. Release S6, disconnect multimeter and set S1 to
OFF.
i. Disconnect power supply.
20
CONV FREQ
a. Connect receiver test facility J12 to RF modules test
ELECTRONIC section. ..
facility J29 using Cable Assembly CX-12061/U (3 ft).
b. Set receiver test facility switches S1 to ON and S6 to
OSC; the 12 V lamp should illuminate.
multimeter should indicate + 12 V dc F0.1 volt.
multimeter should indicate 26 V dc : 2 volts.
e. Set receiver test facility switches S1 to OFF and S6
to OFF and disconnect cable between test facilities.
21
AMPLIFIER RADIO
WARNING
section.
Hazardous voltages exist at RF modules test
facility connector J16 pin Al.
test facility J28 using Cable Assembly CX-12028fU (3 ft).
b. On RF modules test facility, shortcircuit J16 pins 3
and 4, and pins 8 and 9.
5-5
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