User manual AUDIO TELEX TX4000-1

[. . . ] Start with the output controls set at approximately the Level 5 position and adjust clockwise for more output level or counter-clockwise for less output level. Pan COntlOl: Each input channel has a recessed (screwdriver adjustable) pan control. The pan control determines what proportion of each input channel will be sent to either of the Left or Right output channels. Setting the pan control in the centre position will send equal signal levels to both the Left and Right master outputs. Turning the pan control in a clockwise direction will send progressively more signal to the Right output channel and less to the Left output channel. [. . . ] The far left, amber LED on each the VU meters is for indication that AC power is switched ON to the unit only. Headphone Output Socket A 714- TRS stereo socket is provided for the connection of monitor headphones. The output level to the headphones is a nominal 3 volts @ 600 ohms and is connected before the master output level controls. Adjusting the master output level controls will not effect the headphone output level. POWef SWitCh: A rocker switch LED on each of the VU meters. turns AC mains power ON and OFF to the TX820l. A power ON state is indicated by the amber Rear Panel ffifOitt5oll3t;rlrit 3 Pin IEC AC Mains Power lnlet. The operating voltage is 240 VAC @ 50 Hz or ll0 VAC @ 60 Hz. The AC power voltage level is not externally user adjustable but is factory pre-set. The inlet is equipped with an in-built AC fuse holder fitted with a 1 Amp fuse plus a spare. I Please ensure that the mains power cord is disconnected before attempting to check or replace this fuse. Tone Generator Barrier Strip. The TX820l includes a four tone generator module. The tones available include Alert, Evacuate, Pre-Announce and Bell. The four tones may be activated via a simple contact closure. To activate a tone, just short out the common terminal with the terminal labeled with the tone that you want to use. Both channels have equal priority and will mute channels 3-8 whe signal is present. The muting function may be disabled by moving the jumper labeled JP2 (located on the pcb behind the channel volume control). ON and OFF positions are clearly indicated on the pcb beside the jumper. The unit ships from the factory with mutin enabled (JP2 -OFF) - that's right, OFF; it is a muting disable function, not a muting enable frrnction. When channels I and 2 ar disconnected from the main leff/right ouputs, the muting frrnction is automatically disabled. VOX MUtin$. Priority muting is provided for channels I TOng GgngfatOf. A four tone generator is built into the TX820l. The tones available are Alert, Evacuate, Pre-Announce an Bell. All four tones can be activated individually via rear panel contact closures. Tones can be disable from the direct outputs via an internal dip switch (See the 'Internal Adjustnents' section of this manual for more information). A trir pot (R104) which is located on the board behind the left channel master output may be adjusted to vary the level of tone generatc output. The following adjustments involve access to the inside of the TX4000-1. [. . . ] Tone Generator to Direct Output Defeat Switch. for Sigrral from the tone generator can be removed from each direc output via switch # 4 (TG) on the internal dip switch per channel. When in the ON position, the tones (when activated) are fed to th corresponding direct output as well as the master Lefl/Right outputs. When the switch #4 is set to the OFF position, the tones are onl present at the Master Ift/Right outputs. A trim pot (R104) which is located on the board behind the left channel master ouput may b adjusted to vary the level oftone generator output. Phantom Power Defeat Each of the )(LR inputs has access to +l5v DC phantom power. [. . . ]