AN/ARC-5 Handbook

 
Figure 4-5. Circuit Test Point Diagram  

4--12. TRANSMITTER AND MODULATOR. 
 
4--13. DYNAMOTOR UNIT. 
 
4--14. PRELIMINARY INSTRUCTIONS: All tests on the transmitter will be performed using the 
AN/GRM-1 Test Setup optional wiring, illustrated in Figure 1--3, or the AN/ARC-5 Test Bench 
Harness. Select transmitter one or two, corresponding to the desired units position in the test rack. 
(See figure 4--15.) 
 
STEP TEST 
POINT TEST 
EQUIPMENT 
CONTROLS NORMAL INDICATION POSSIBLE 
CAUSES OF 
ABNORMAL 
INDICATION 1. F Emission selector 
switch to...

Figure 4-6. Circuit Test Points  
Figure 4-7. Converter Circuit Test Points  

Figure 4-8. Converter Circuit Test Points  
Figure 4-9. Antenna Circuit Test Diagram  
Figure 4-10. Antenna Circuit Test Points  
Figure 4-11. Typical Transmitter, Top View, Shield Removed  

4--15. OSCILLATOR.  
 
(Follow chart below.) 
STEP 
TEST 
POINT TEST 
EQUIPMENT 
CONTROLS NORMAL 
INDICATION POSSIBLE 
CAUSES OF 
ABNORMAL 
INDICATION 1.  
 Emission selector 
switch to CW. Set 
VTVM on 120-volt 
d-c scale, --polarity 
and connect to 
TEST  
POINT H, the 
ungrounded 
terminal of PA grid 
resistor, R-74 and 
chassis. TRANS. 
POWER switch to 
ON. depress the 
Microphone 
button. See figure 
4--17. VTVM should indicate -
40 to -70 volts d-c grid 
bias, if oscillator is 
supplying proper...

 
Figure 4-12. Typical Transmitter, Bottom View  
Figure 4-13. Modulator, Type MD-7/ARC-5, Bottom View  

 
Figure 4-14. Typical MD-7/ARC-5 Modulator  
Figure 4-15. Transmitter and Modulator Test Points  

 
Figure 4-16. Diagram