Telex MCE325 - Manual (Page 21)

2-1
S
E C T I O N
C HAPTER 2
I
NSTALLATION
Internal Programming and Adjustments
WARNING
Hazardous voltages exist inside this equipment. Disconnect the AC line cord before
opening the equipment or attempting any internal programming or adjusting.
General
Prior to installing the MCE325, it may be necessary to change some of the internal programming
to suit your particular application. Table 2.1 and Table 2.2 list the functions for the DIP switches
and jumpers which are used for internal programming. Also shown are the default settings that
were pre-programmed at the factory.
If your application requires settings that are different from the defaults, you will have to remove
the top cover of the unit (see Figure 2.1) and make the required changes. If you do change the
internal programming, it may be useful to note the changes for future reference.
The locations of the DIP switches and jumpers are illustrated in Figure 2.2. DIP switch
programming is accomplished by setting switches to the “off” or “on” positions. Jumper
programming is accomplished using shorting jumpers. By inserting the jumpers to short the
appropriate pins, a function is either assigned or not assigned. Pin 1 of each jumper is indicated by
a square symbol in Figure 2.2 for reference when making changes. Also shown in Figure 2.2 are
trimmers for adjusting the sidetone and speaker dimming levels. Usage of the DIP switches,
jumpers, and level trimmers is described in the following paragraphs.