Mic Gain Adjustment (R156); Clear-Com Setup - Telex BP-2002 Operating Instructions Manual

Operation
To adjust the level of your own voice heard in the headphones, tap the Talk button
once to turn on the headset microphone. Then, use a small Phillips head screwdriver
to increase or decrease your voice level while talking into the microphone.

Mic Gain Adjustment (R156)

The Mic Gain Adjustment is accessible internally on the board (R156) (refer to Figure
3) or by removing the belt clip mounting screw (callout 5 in Figure 1).
To adjust mic gain, do the following:
Using a Phillips head screwdriver, turn the Mic Gain pot clockwise to
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increase the gain (or counter-clockwise to decrease the gain).

Clear-Com Setup

Make the following switch and jumper changes when the beltpack is used with Clear-
Com equipment
BP-1002/2002
SW1 must be placed in the UNBAL position.
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Internal Switches and Jumpers
TABLE 2.
Jumper/
Switch
Number
JP1 and JP2
SW1
JP3
JP5
10
Jumper or Switch Function
Power Select
Channel one power: pins 2 & 3 shorted
(On BP-1002, pins 2 & 3 are always shorted)
Channel two power: pins 1 & 2 are shorted
Clear-Com/Audiocom
Unbalanced/Balanced Line
Must be left on default
Pins 1 & 2 shorted
Default
Setting
Pins 2 & 3
are shorted
BAL
Pins 2 & 3
shorted
Pins 1 & 2
shorted