GAI-Tronics 774-001 Manuale di installazione, funzionamento e manutenzione - Pagina 3

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Pub. 42004-179A
3 of 4
Model 774-001 Portable Station Enclosure
Page:

Speaker Volume Adjustment

The speaker volume is adjusted by a potentiometer on the top of the enclosure. Maximum speaker
amplifier output is adjusted by a potentiometer located behind the amplifier nameplate. If the factory
setting of the speaker output level is not loud enough (the external volume control is fully clockwise), use a
small standard screwdriver to loosen the screw securing the Model 701 Amplifier front panel nameplate.
Insert the screwdriver into the hole under the name tag, and adjust the volume control for the desired output
level.
There is also a volume control located on the top of the Model 774-001 Enclosure. This control adjusts the
speaker amplifier's output level from a minimum to a maximum level determined by the amplifier's internal
setting.

Speaker Muting Adjustment

Normally, when the station handset pressbar is pressed, the paging speaker connected to that station is
silenced (muted) to prevent acoustic feedback to the handset microphone. However, while the handset is in
use for party line conversations, the paging speaker will broadcast pages from other stations.
To disable the muting feature, follow these steps:
1. Locate the lugged violet wire attached to terminal 7 (Mute) on the terminal block within the enclosure.
2. Transfer the lugged violet wire to terminal 8 (Page L1).
Figure 3. View of Assembled Portable Station
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