TM 11-6625-1696-12
5-6. Organizational Quarterly Preventive Maintenance Checks and Services Chart-Continued
Seq
Item
Procedure
Reference
No.
21
Switch
Position
(Cont.)
S1
ON
S12
OSC
S13
600 V ON
S20
+600V
d. Set RF modules test facility switches S10 to
DRIVER FIL and S8 to ON. The DRIVER FIL and
OUTPUT FIL lamps should light.
e. Set RF modules test facility switch S9 to 600 V ON ...
the 600 V lamp should illuminate. Transmitter test
facility meter M1 should indicate 40 percent minimum.
position and S1 to OFF.
22
FILTER BANDPASS
a. Connect receiver test facility J52 to RF modules test
section.
facility J17 using Cable Assembly CG-409H/U (3 ft).
b. Connect Power Meter HP-435A to RF modules test
facility J18 through Thermistor Mount HP-8484A and
Adapter-Connector UG-349A/U.
c. Set receiver test facility switches as follows:
Switch
Position
S1
ON
AT1
30
S14
30 MHz
S9
EXT VIDEO
d. The power meter should indicate -42 dBm or higher, .
indicating an insertion loss of 12 dB maximum.
e. Set receiver test facility switch S1 to OFF and
disconnect test equipment.
a. Connect receiver test facility J21 to RF modules test
23
AMPLIFIER, RF section.
facility J29 using Cable Assembly CX- 12061/U (3 ft).
b. Set receiver test facility switches S1 to ON and S6 to
OSC.
c. Set RF modules test facility switch S11 to NOR- ........
MAL; the + 12 V lamp should light.
d. Connect multimeter to RF modules test facility J25....
pins 3 (-) and 6 (+); the multimeter should indicate +12 V
dc0.5 volt.
multimeter should indicate + 12 V dc + 0.5 volt.
f. Set receiver test facility switch S1 to OFF and
disconnect Cable Assembly CX-12061/U.
a. Connect receiver test facility J52 and J12 to RF
24
AMPLIFIER, IF section.
modules test facility J30 and J29 using Cable Assemblies
CG-409H/U (3 ft) and CX-12061/U (3 ft) respectively.
b. Set receiver test facility switches as follows:
Switch
Position
S1
ON
S9
EXT VIDEO
S14
30 MHz
AT1
60
c. Connect Power Meter HP-435A to RF modules test
facility J31 through Thermistor Mount HP-8484A and
Adapter-Connector UG-349AIU.
d. Set RF modules test facility switch S12 to ON, the ....
power meter should indicate -10 dBm +3 dB, and the
- 12 V lamp should light.
e. Set receiver test facility switch S1 to OFF and
disconnect test equipment.
5-6
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