Phantom Power
The microphone inputs on the TX8000 all p18v DC phantom power which is required for electret microphones.
If desired, phantom power can be defeated via an internal jumper which is located on the output board near the line
output XLR socket on the rear panel (position X3 on the output board). The default setting is with the link in the ‘on’
position, shorting the centre pin and the pin closest to the rear of the TX8000. To turn phantom power off, move the link
to short the centre pin and the pin closest to the front of the TX8000. Note: It is necessary to disconnect the power cord
and remove the lid from the mixer before operating this switch.
Optional Accessories
Note: The installation of some of the following optional accessories involves access to the inside of the mixer. Installa-
tion should only be attempted by a qualified technician. Always turn off the AC power and remove the AC power cord
before attempting to access the inside of the mixer.
Tone Generator Module
An optional ATC5488 4 tone generator board is available for the TX8000. This internally mounted PCB can be easily
fitted and plugs directly into a socket provided on the pre-amp circuit board inside the TX8000. The socket is located on
the front board behind the input 5 level control. Please follow the instructions supplied with the tone generator. When
any tone from the ATC5488 is activated (via contact closure) all inputs will automatically mute except for input 1. Tones
available on the ATC5488 tone generator board are:
Evacuation Tone (to Australian Standard AS2220.1.2)
Alert Tone (to Australian Standard AS2220.1.2)
Bell Tone
Pre Announce Chime
Muting Modules
Two optional VOX (signal activated) muting modules are available for the TX8000. The TX3010 mutes channels 2-8 from
input 1 while the TX3014 is a dual level muting module which mutes channels 2-8 from input 1 and 3-8 from input 2. Both
modules plug into a socket provided on the pre-amp circuit board inside the TX8000. The socket is located directly
behind the input 1 level control.
TX3010 Muting Module: Provides muting from channel 1 only. When activated, all other channels are muted
TX3014 Muting Module: Provides dual priority muting. Channel 1 mutes 2-8. Channel 2 mutes 3-8.
Other Internal Adjustments
Note: The following adjustments involve access to the inside of the TX8000. Installation should only be attempted by
a qualified technician. Always turn off the AC power and remove the AC power cord before attempting to access the
inside of the TX8000.
Input Sensitivity Adjustment: An internal trim adjustment is provided inside the TX8000 behind each XLR input.
This trim control allows the input sensitivity to be adjusted for either very high level or low level inputs.
Phantom Power Defeat: A 3 pin link is located on the output board directly behind the Mic #8 XLR socket. The default
setting is with the link in the ‘on’ position, shorting the centre pin and the pin closest to the rear of the TX8000. To turn
phantom power off, move the link to short the centre pin and the pin closest to the front of the TX8000.
Fuse Sizes TX8000 Mixer
Mains 240 VAC: 1 Amperes Slow Blow
Line Inputs
The TX8000 includes six dual RCA inputs (channels 1-6) for unbalanced line or aux devices such as tape recorders,
video players, tuners etc. An internal trim control is provided for each input (see the ‘Other Internal Adjustments’
section of this manual). Dual RCA connectors are provided to allow for the simple connection of domestic stereo
devices such as tape desks and CD players. Both the left and right outputs from these devices can be connected to the
dual RCA’s and will be summed to mono within the TX8000.
Note: Channels 1-6 of the TX8000 have both a microphone and line connection. Please note that only one of these (on
each of these channels) should be used at the same time.
