GAI-Tronics 751-905 Smart SERIES Manual - Halaman 7

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751-905 SmartSeries

Speaker Amplifier

Maintenance

Regular inspection and a good preventive maintenance program will increase the reliability of your

GAI-Tronics station. The GAI-Tronics Field Service Department can formulate a service contract suited

to your facility's specific need for preventive maintenance.

If the equipment requires service, contact your Regional Service Center for a return authorization number

(RA#). Equipment should be shipped prepaid to GAI-Tronics with the return authorization number and a

purchase order number. If the equipment is under warranty, repairs will be made without charge. Please

include a written explanation of all defects to assist our technicians in their troubleshooting efforts. Call

800-492-1212 for help in identifying the Regional Service Center closest to you.

WARNING

Before performing any of the following preventive maintenance steps, remove

all power from the station.

1. Inspect and replace frayed or cracked wiring.

2. Secure/replace loose wires and spade terminals.

3. Remove corrosion from terminals.

WARNING

fuse.

F1 = T.160A, 250V, 520 mm, IEC 60127-2

F2 = T.630A, 250V, 520 mm, IEC 60127-2

F3 = T.125A, 250V, 520 mm, IEC 60127-2.

The User Adjustment Control is located beneath the GAI-Tronics nameplate on the front panel. Refer to

Figure 1. It is used to make all user adjustments normally required for installation. Loosen the two

screws on the GAI-Tronics nameplate and rotate it counterclockwise to access the adjustment hole. Make

adjustments by inserting a 1/8-inch flat blade screwdriver through the access hole and into the

potentiometer located directly behind the hole.

The User Adjustment Control potentiometer can be used to make three separate adjustments:



Minimum speaker amplifier output level setting



Offset amplifier level (difference between the ambient noise and the amplifier output levels)



VLC (volume level control) level adjustment (sets a preset speaker level to override the normal

volume control setting).

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Do not remove fuses when energized. Replace with the same type and size

Pub. 42004-686L2D

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AGE