GAI-Tronics ICS Hazardous Area Page/Party Stations - Manual (Page 21)

Pub. 42004-723L2G
ICS Hazardous Area Page/Party
®
Station Page 19 of 31
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Adjustments
Opening the Station
WARNING
Before performing any of the following settings and adjustments, remove all
power from the station.
WARNING
To reduce the risk of hazardous atmospheres, disconnect the equipment
from the supply circuit before making any adjustments to the amplifier’s handset level.
Remove all cover bolts from the enclosure. Swing the front door open to access the internal PCBAs.
50 kHz Alignment
The 50 kHz alignment, R5, adjusts the receiver’s frequency for VLC operation. It is set at the factory and
should not be adjusted by the installer.
Speaker Mute
P26 allows for the installer to mute the speaker audio during VLC operation or normal operation. In the
“50kHz” position, the audio is muted during a VLC broadcast. In the “NORM” position, the audio is
muted during normal operation. To operate the unit without the muting feature, remove P26.
Audio Alignment
To set the normal speaker output level, set DIP switch SW2-1 to the “off” position. Set SW2-2 to the
“on” position to enable a reference test tone. Adjust R91 on the Main PCBA (refer to Figure 9 for
location) to the desired audio level. To mute the audio, turn R91 fully counterclockwise and put P26,
MUTE, in the “NORM” position.
N OTE : If LED2 on the VLC PCBA is on, indicating the system VLC tone is present, this adjustment
cannot be made.
To set the VLC controlled speaker output level, set SW2-1 to the “on” position. Set SW2-2 to the “on”
position to enable a reference test tone. Adjust R12 on the VLC PCBA to the desired audio level. To
mute the audio, turn R91 fully counterclockwise and put P26, MUTE, in the “50KHz” position.
Set SW2-1 and SW2-2 to the “off” position to return to normal system operation.