Quantcast Voltage and Resistance Measurements - TM-11-6625-623-450035

 

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Figure 4-1. Voltage and resistance test connections
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TM-11-6625-623-45 Maintenance Kit Electronic Equipment MK-722/URC Manual
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Procedure. - TM-11-6625-623-450036
TM 11-6625-623-45
4-5. Voltage and Resistance Measurements
a. Test Equipment and Materials.
(1) Multimeter ME26B/U (multimeter) or equivalent.
(2) Voltmeter, Electronic AN/USM98 (differential voltmeter) or equivalent.
(3) Power Supply PP351/U (variable dc voltage supply, 0 to 20 volts, 1 milliampere (ma)
maximum) or equivalent.
b. Test Connections and Conditions.
(1) Make test connections as specified in Test procedure column of c below and illustrated
(2) Resistance checks are made with no power applied to the function test set.
Note: For parts location, refer to figures 2-1, 22, and 2-3.
c. Procedure.
Step
Control
setting
Test
procedure,
Performance
standard
No.
Test equipment
Equipment under test
Circuit should measure
1
a. FUNCTION
FUNCTION  SELECTOR
Measure the resistance
600 ohms 120 with R3
switch:
switch: TGC
between J2-IF TRANS
at clockwise stop and
OVERIDE.
jack J9 and J2FREQ
OHMS.
100 ohms 20 at counter-
DIVIDER jack 11 with
b. R A N G E
clockwise stop.
switch:
TGC & CAPTURE
RX10.
RANGE R3 poten-
tiometer at clockwise
and  counterclockwise
stop.
Circuit should measure
Measure the resistance be-
a. FUNCTION SELEC-
Same as step 1.
100 ohms 20.
tween J2-IF TRANS
TOR switch: TGC
jack J9 and GRND jack
OVERIDE.
J13.
b. TGC & CAPTURE
RANGE R3 potentio-
meter: clockwise
stop.
a. FUNCTION SELEC-
Measure the resistance be-
Circuit should measure
a. FUNCTION
10,000 ohms 1,500.
tween J3KC STAB
switch:
TOR switch: 70K-5
jack J8 and J2-FREQ
CAPTURE RANGE.
OHMS.
DIVIDER jack J11.
b. R A N G E
b. TGC & CAPTURE
switch:
RANGE R3 potentio-
meter: counter-
RX1K.
clockwise stop.
4
a. FUNCTION
Measure the resistance be-
Circuit should measure 470
a. FUNCTION SELEC-
tween J1-KC STAB jack
kilohms 70.
switch:
TOR switch: 70K3
OHMS,
J7 and J2-FREQ DI-
C A P T U R E RANGE.
b. RANGE
b. TGC & CAPTURE
VIDER jack J11.
switch:
RANGE R3 potentio-
RX100K.
meter: counter-
clockwise stop.
Circuit should measure
5
a. FUNCTION
a. FUNCTION SELEC-
Measure the resistance be-
switch:
0 ohm at clockwise stop
TOR switch: SET
tween CALIBRATE
and 50 ohms 10 at
OHMS.
LEVEL.
WITH 10.000V R4 jack
b. R A N G E
counterclockwise  stop.
J13 with OFF-SET.
switch:
ADJUST R2 poten-
tiometer at clockwise
RX1.
and  counterclockwise
stops.
29

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