Telex AUDIOCOM BP-2000 - Manual (Page 10)

INTERNAL SWITCHES, JUMPERS AND ADJUSTMENTS
There are several internal switches, jumpers and an
adjustment that affect operation. These are described below.
To gain access to the switches, jumpers and the adjustment,
disconnect all power and line connections. Remove two
screws from the top of each side and two screws from bottom
of each side. Switch, jumper and adjustment locations are
shown in Figure 2.
Figure 2. Internal Switches, Jumpers and Adjustments
NOTE: Figure 2 shows a BP-2000 with the switches and
jumpers in their factory default positions (referenced in
Table 2).
The SIDETONE adjustment is also accessible behind the
screw that holds the belt clip (callout 5 in Figure 1).
The functions of the internal switches and jumpers are
described in Table 2.
9
SW1
UNBAL
BAL SW
3
SW4
EL J2
B U
D S
R1
9
SW2 SW5
J15
R4
9
J4
J1
DYN
J6
J7 J5
3 2 1
1 2 3
J3
1 2 3
3 2 1