Guardian Telecom TBA Series, Installation & Operation Manual

Page: 19 / 28

Guardian Telecom Inc. Installation & Operation
TBA Models
Page 19
9. Installation Adjustments

The speaker outputs levels are each individually adjustable.

The gain for the Central Station microphone is adjustable.

The gain for the Monitored Station, Station #1, #2, and #3 are on one adjustment.
Remove the TBA enclosure top panel by unfastening the six screws; retain the screws and panel.
Once the top panel has been removed, access to 120 volts AC is provided; therefore the service
personnel should be qualified to work with electrical equipment.
9.1. Initial Settings
These settings are to be done before powering the TBA “on” for the first time. If previous
adjustments have been made, note the front panel adjustment positions or mark them on the
internal PWBA potentiometers.
Refer to Figure 15 - Adjustment Locations for the locations of the following adjustments.
Adjust these potentiometers to the 50% rotation point:

Central Station Volume (R11)

Monitored Station Volume (R141)

Station #1 Volume (R47)

Station #2 Volume (R79)

Station #3 Volume (R110)

Central Station Volume (Microphone – R183)

Stations 1 to 3 and Monitored Station Volume (Microphone – R184)

Ring Volume (R186)
As well the following settings are to be done.

Adjust Central Station Attenuation (R12) to fully counterclockwise

JP1 to “Ring Enable”

JP2 to “nearest pair to R180

J21 jumper on 1 to 2 (CENTRAL RELAY)

J21 jumper on 5 to 6 (MONITORED RELAY)

J21 jumper on 9 to 10 (STN #1 RELAY)

J21 jumper on 13 to 14 (STN #2 RELAY)

J21 jumper on 17 to 18 (STN #3 RELAY)

Verify the jumpers on J21 are only those shown above unless special instructions are given
for “RINGING” settings.