TM 11-6625-1696-12
5-6. Organizational Quarterly Preventive Maintenance Checks and Services Chart-Continued
Seq
Item
Procedure
Reference
No.
7
AMPL FREQ MULTIPLIER
a. Connect J17 to J19 with RF cable assembly 335-279.
section.
Connect adapter CE9307-15 to J20 pin 2 and connect the
adapter to J52, using RF cable assembly 335-277.
b. Set S20 to position S12 and S12 to OSC. Check to see
Para 5-8b, items
that LOW PWR and SYNC indicators light. ........12 and 13.
c. Set S18 to positions 47.50 through 72.50 and check to
Para 5-8b, items
see that LOW PWR indicator lights. AMPL FREQ14 and 15.
MULTIPLIER SYNC indicator does not light. SYN-
THESIZER ON indicator lights and SYNTHESIZER
SYNC indicator does not light.
d. Observe meter Ml as S12 is set to the positions
shown:
Sw S12pos
Other switch posMeter indication
OSC ..................................S18 to all pos................ ..20 to 70.
DBLR................................. 818 to all pos................ ..20 to 70.
REF ............................... S15 to DRIVER ................ ..50 to 80.
REF ..............................S15 to OUTPUT ................ ..50 to 80.
e. Set S18 to OFF and check to see that SYN- .............
THESIZER ON indicator goes out and that AMPL
FREQ MULTIPLIER SYNC indicator lights.
f. Set Sl2 to OFF. Disconnect RF cable assemblies and
adapter (a above).
8 SYNTHESIZER section Set S17 to ON; S18 to 47.50 and check to see that
ON indicator lights. Set S17 and S18 to OFF.
9 ....................................... FAN section Operate S19 to TEST and check to see that the fan
stops running. Release S19 and check to see that fan
runs.
10 CONTROL ALARM section.
INPUT control fully counterclockwise. Set S25 to ON.
b. Turn SET INPUT control fully clockwise and check
to see that multimeter indicates from 0 to at least 0.5 volt.
c. Set S25 to OFF and disconnect multimeter.
11 POWER section.............. Set S1 to OFF.
TEST FACILITY, RECEIVER
TS-2867(V)21GRM-95(V)
12 Power section indicators
and power
Set S1 to ON; AC, +12 V, and + 26 V indicators should
Para 5-8b, items
supply metering.
light.
Check the power supply by observing meter M as
S5 is set to the positions shown:
Sw S5pos
Meter indication
-12V..................................................... Green band.
+12V.................................................... Green band.
+26 V................................................... Green band.
13 30 MHz MODEM
power supply
Set S5 to -12V MODEM and check to see that meter
metering.
M1 indicates in the green band.
14 30 MHz MODEN .............
Set S5 to S9 MODEM and observe meter MI as S9 is
set to the positions shown:
Sw S5pos
Meter indication
100 Hz ................................................. Green band.
1 KHz .............................................. Green band.
50 KHz ............................................ Green band.
30 MHz............................................ Green band.
15 POWER SUPPLY section.
Set S5 to - 12 V and S2 to 24 V; check to see that
POWER SUPPLY section indicator lights, - 12 V and
+12 V indicators go out and meter M1 indicates zero.
Set S2 to OFF.
a. Connect J14 to J10 with RF cable assembly 335-279.
16 TUNER RADIO FREQ.....
Connect the adapter to J12 pin A2.
5-4
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