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WIR TX75 PRO Infrared Transmitter
No Sound through Receivers:
• Check to make sure the receiver is operating on the same frequency as the transmitter.
• If some of the receivers work but others don’t, check for bad batteries or earphones.
• If none of the receivers work, check to see if the power and audio input cables are connected to the transmitter. Verify that the
“Power Indicator” is on steady, and ch1 or ch2 “audio-level indicator” blinks periodically.
• Check to see if the transmitter is connected properly to the audio source. The audio-level indicators should flash on channels that
have audio.
• Make certain the transmitter is not covered by objects which would block infrared light.
Sound Through the Receivers is Weak and Noisy:
• Try adjusting the audio input level (see page 10). If the signal sounds okay, you may need to reposition the transmitter beam or add
additional TX75-S slave emitters to the WIR TX75 PRO system.
buzzing or Humming Noise in Sound System:
• Check for ground loops or noise on the input signal.
• Check to make sure the “balanced / unbalanced” switch is in the correct position.
If these instructions do not address your problem or the issue persists, please call your authorized Williams Sound dealer or
representative.
WIR TX75 PRO Indicator lights
INdICATOR
ON UNIT
STATe
deSCRIPTION
Power Indicator – Green
(round or rectangle) Master or Slave
On steady
Unit is powered and actively transmitting
Fade-on, Fade-off… (continuous)
Unit is powered and in sleep/power-save mode (no audio signal
detected, unit is not transmitting)
Fast blink (continuous)
Self test has detected an internal failure on this unit
Audio Level Indicators – Yellow
round (ch1 or ch2) Master
Blinking periodically
Audio is present on this channel and is set to the optimum level
On steady (or most of the time)
Audio is present on this channel but the level is too high
Off
Audio is not present OR audio level is too low on this channel
Slave Status Indicator – Yellow
(rectangle) Master or Slave
On steady
Carrier signal is being sent to this slave
Off
No carrier signal is being sent to this slave
Fast blink (continuous)
Self test has detected a CAT-5e cable failure between the master
and this slave unit
All indicators Master or Slave
On for 2 seconds, Off for 1
second, resumes normal states
Initial power-on sequence OR unit has reset
On for 2 seconds, Off for 1
second… (continuous)
Unit is continuously resetting - may be due to a low voltage supply
condition (In Master: bad power supply. In Slave: bad CAT-5e cable
or CAT-5e cable is too long)
NOTE: The indicator lights can all be turned off AFTER initial set-up to allow for less conspicuous operation.
mounting Options
BKT 024 - Universal wall / ceiling mount (included)
MLB 003 - Linking Bar - 2 1/2” bar with 1/4” - 20 threaded male connectors on both ends (optional), for stacking master and
slave together.
The TX75 and TX75-S can be mounted on any camera tripod stands with a 1/4” - 20 threaded connector.
The TX75 and TX75-S can be operated with or without the faceplate, if desired. The faceplate can be removed and painted to
match room decor. Lightly sand faceplate with 400 grit sandpaper apply primer and two coats of final color.
Do not paint the
infrared lens behind the faceplate of the TX75 or TX75-S.
