GAI-Tronics 751-002 Quick manual - Maintenance

Pub.  42004-258B 

Model 751-002 24 V DC Speaker Amplifier 

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Adjustment 

Model 751-002 Speaker Amplifier mates with an enclosure wired directly to a speaker.  The speaker 

volume adjustment is located under the GAI-Tronics nameplate on the front panel.  Refer to Figure 1.  

Use a small flat-blade screwdriver to adjust the speaker sound volume. 

Maintenance 

The following table lists some hints to aid technicians in troubleshooting: 

Troubleshooting 

Problem  

Solution 

Feedback/distortion (a hum or 

buzz on the line) occurs during 

all Page/Party

®

 station operation. 

  The line may be improperly terminated.  Inspect the system cable 

for loose connections, shorts, and grounds.  Line balance assembly 

connections are critical. 

Associated speaker level requires 

adjustment. 

  Adjust the speaker volume control located on the amplifier front 

panel, behind the nameplate.  Refer to Figure 1.  Use a small 

standard screwdriver to perform these adjustments.