Connevans Azden IRR-40P Troubleshooting guide

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Azden IRR-40P Soundfield
IRR-40P receiver/amplifier Pages 4-5
Transmitter microphones Pages 6-11
Installation guide Pages 12-18
Cautions & troubleshooting Pages 19
User & Installation Guide
for IRR-40P systems
with
Swift TX & handheld transmitters
B460IRR40P V1.0

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IRR-40P receiver/amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Receiver front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Receiver rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Transmitters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Swift TX microphone transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Charging the
Swift TX transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Handheld microphone transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Charging the
handheld transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
IRR-40P Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fitting the speakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fitting the intra red sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Mounting the infra red sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Fitting the F-connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting up and testing the system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Demonstrate and set the volume for the user. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Contents

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
Introduction
Thank you for selecting the Azden IRR-40P system as your wireless classroom solution. We are
confident that it will perform beyond your expectations. For over 50 years Azden Corporation
has been creating technologically advanced products. By taking advantage of the latest in CAD
design and SMT production techniques, Azden’s engineers are able to produce products that
exceed the published specifications and perform well beyond the warranty period.
The Azden IRR-40P represents a breakthrough in infra-red wireless technology. Instead of the
normal radio waves that other wireless systems use, the Azden IRR-40P uses invisible light beams
in the infrared range. The IRR-40P's enhanced performance assures you of the finest in audio
clarity and reliability. The specially selected high-frequencies provide you with trouble free
performance, even in fluorescently lit classrooms.
Infrared (IR) wireless microphone systems are the best solution for classrooms. In today’s RF
saturated world a regular (VHF or UHF) microphone system risks interference from a variety of
other devices and sources. Cell phones, radios, TV, PA systems, police and emergency service
systems, etc., can all interfere with VHF and UHF ‒ but not with IR. Furthermore, infrared is
perfect for classroom audio since, unlike the other systems, IR is short-range and cannot
penetrate walls. This means that your school can have as many classrooms as desired with
individual audio systems, without fear of interference. Since the Azden system is dual-channel, a
teacher can have one microphone and a second person can also have a microphone. In
addition, since each classroom system is on the same pair of channels, teachers can go from
room to room without having to switch microphones.
In the real world, the ability to use multiple systems in the same location without frequency
interference will prove to be a tremendous benefit to you. Using infrared means that the audio
generated in your classroom stays in your classroom. Your discussions cannot be overheard on
other systems in other classrooms.
Designed by professionals ‒ for professionals, the Azden IRR-40P will provide you with years of
worry-free, high-quality performance.

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Receiver rear panel
Receiver front panel
A. Power
switch
IRR-40P receiver/amplifier
E. Channel
1/2 indicator
B. Channel 1/2
volume
D. Auto Fader Switch
(normally off)
F. Mic tone
C. Line 1/2
volume
G. Ext. sensor
input 1 H. Ext. sensor input 2/3
I. Speaker sockets
L. Power
input
J. Line out
K. Line 1/2
inputs

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
Receiver front panel
A. Power Switch ‒ turns the receiver ON and OFF. When ON the LED will glow red.
B. Channel 1/2 Volume ‒ adjusts the output volume for CHANNEL 1 or 2.
C. Line 1/2 Volume ‒ adjusts the output volume for LINE 1 or 2.
D. Auto Fader Switch ‒ Turns the AUTO FADER ON and OFF. When ON, speaking into the
microphone (either Channel 1 or 2) will mute the sound from LINE IN 1 and/or 2.
E. Channel 1/2 Indicator ‒ corresponding LED glows green when receiving CHANNEL 1 or 2.
F. Mic Tone ‒ adjusts the system’s high frequency tone.
Receiver rear panel
G. Ext. Sensor Input 1 ‒ primary Sensor input
H. Ext. Sensor Input 2/3 ‒ sockets for additional sensors, if required, to enhance the
receiver’s potential range
(see page 13).
I. Speaker sockets ‒ the 4 ceiling or wall-mounted speakers are attached here. Carefully
follow the + and ‒ markings.
J. Line Out ‒ this is a mono ‘line-level’ output (via 2x RCA phono).
K. Line 1 and Line 2 Inputs ‒ any external audio source with a standard ‘line-level’ output
such as a CD player, iPod/iPad or DVD player can be attached here (RCA phono).
L. DC 15V ‒ this is the power input. Plug the small, round connector of the mains AC-DC
adapter (BC-30) in to power receiver (15V DC @ 2.5A ‒ centre positive).
Mounting the sensors:
Infrared light acts the same as visible light: solid objects will block it, but it will also be
reflected. The sensor(s) should be mounted so that they are above the students’ heads or any
other obstacles.
Overall system setup:
In general, the IRR-40P receiver is installed near the front of the room in a convenient place
for the teacher to adjust if required.
Four wall- mounted speakers are installed and a cable is run from each of the speakers to one
of the 4 SPEAKER terminal pairs on the back of the receiver.
We advise fitting a single IRD-60 ceiling-mount external sensor installed in the center of the
ceiling. Its cable is connected to ‘Ext sensor input 1’ on the rear of the IRR-40P.
The teacher wears the SwiftTX transmitter and sets it to CHANNEL 1. The handheld
transmitter microphone, set to CHANNEL 2, is used as a pass around mic for students.
If a DVD player, CD player or MP3 player is used, the audio from this can be attached to either
LINE 1 or LINE 2 on the back of the IRR-40P.

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Swift TX microphone transmitter
The two parts of the neck clasp
may be pushed together or
pulled apart either directly or
by sliding.
To turn on the SwiftTX press and hold the on button until the status indicator lights. Similarly
to turn off or mute the Swift TX press and hold the button until the indicator goes out.
Charge socket
Emitter
window
Aux
socket
Microphone
socket
Vol + Vol ‒
On/Off/Mute
15 0 m m
Status indicator:
Green = on
Alternating red/green = recharge soon
Red = charging
Orange = charged
Transmitters
Indicator LED
The indicator LED shows green, red or orange, depending on the status or mode of the Swift TX.
In normal use:
Solid green ‒
the Swift TX is on and
working.
Alternating green/red ‒ the battery
is low and the unit needs to be
recharged.
No indication ‒ the unit is switched off.
When charging:
Solid red ‒ the Swift TX is charging normally and is
turned off.
Flashing red ‒ there is a problem with charging ‒
try fitting a new 'exposed end rechargeable
battery' .
Solid orange ‒ the Swift TX is charged, it is turned
off and the charger has switched to trickle charge.
Adjusting the neck strap
Correct positioning of a transmitter is important. The Swift TX should be
worn so that the emitter faces forwards and the unit rests about 150mm
(the length of a biro) below the mouth ‒ this means it should sit just
below your collarbone.
Both straps can be easily adjusted as required, using the sliders.
Note ‒ replacement straps are available, please see www.DeafEquipment.co.uk
45IRTXSTRAP Replacement strap 45IRTXSCLIP Replacement clip

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Use the external charger (part no: 45IRTXHCHG2 ) plugged into a mains socket. Charge time is
12-16 hours from flat (i.e.overnight).
It is safe to leave on charge for up to 5 days.
When charging, the multi-colour indicator will show red.
The
Swift TX
will last a full school day with fully charged batteries ‒ please contact our Soundfield
Technical Helpline for advice should you experience short battery life.
Charging the Swift TX transmitter:
The batteries will last approximately 8 hours.
You will usually need to leave the unit recharging
at the end of the day.
To conserve power always remember to switch the
transmitter off when not in use. If a second
transmitter is only occasionally used it will need
charging less often.
Azden IRR-40P Soundfield
1.3mm
plug
Charger 45IRTXCHG2
for charging a Swift TX
or beltpack transmitter

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Using the Swift TX on external power
Connecting a charger automatically turns off the Swift TX and starts charging it (red indicator).
During charging, a press of the ON/OFF button will suspend charging and return the unit to
ON (green indicator) ‒ in this mode, although the battery needs to be fitted, the Swift TX is
now powered from the charger rather than the battery.
Using external power will preserve battery life when connected to an external sound source.
Changing the rechargeable battery
The rechargeable battery will only need changing very
occasionally ‒ it should last between 1-2 years.
To open battery compartment, press in the centre of the battery
door with both thumbs and slide off.
The battery door is treated with a clear
anti-slip finish to reduce the tendency to
move when worn.
Pull on ribbon tab to release battery.
Use
only with the exposed metal end
battery as supplied with the Swift TX.
Other types of battery will not charge.
Rechargeable battery:
1 x 2800mAh high capacity rechargeable
AA battery ‒ exposed end
(MBRAAHX1E) .
This battery is fitted with the exposed metal end against the spring.
Position the battery on top of the ribbon tab for easy removal
next time.
Technical Note ‒ when a battery is first inserted, the SwiftTX will
automatically test the battery to make sure it has enough charge.
The indicator will show orange for 5 secs while it is testing, followed by green or red for 1 sec:
Green ‒
the battery has enough charge. Red ‒ the battery needs to be recharged .
A flickering indicator or no indicator ‒ the battery has no charge and needs to be recharged
or replaced.
Side contact
Exposed
metal end

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
Auto power-off
The Swift TX monitors the sound level and if the level drops below approx 76dB SPL for more
than ten minutes, then the unit will switch off automatically to preserve the battery.
The Swift TX is normally used on channel A. However
it can be easily changed to channel B as follows:
Open the battery compartment.
Inside, just above the battery, you will be able to see
a small switch labelled ‘A channel B’.
Use the end of a paperclip to slide the channel
switch.
Always replace the battery compartment cover
afterwards.
Channel change
The IRR-40P unit has two mic receiving channels 1 & 2. The Swift TX A/B channel change
switch is in the battery compartment. (A = 1, B = 2)
Pendant, beltpack or handheld transmitters can be used on either channel.
Microphone
Dual directional microphones
The Swift TX uses two separated microphones (Left and Right) to provide a constant
transmitted voice level as the user’s head is turned from side to side.
The optimised dual microphone design also provides ideal pick up of the user’s voice and
rejects unwanted sounds in all other directions.
This means that you don’t get a variation of volume as the speaker moves their head from
side to side.
Microphone
H
y
p
e
r
w
i
d
e
m
i
c
r
o
p
h
o
n
e
c
o
v
e
r
a
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e
Microphone gain settings
The Swift TX microphone gain control is factory set and will not need adjusting.

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Handheld microphone transmitter ‒ IRH-15c
Controls
7
7
Holding the microphone transmitter
It is important to hold the microphone in the
middle so that the emitters are not being
covered by your hand.
Emitter windows
Charging the handheld transmitter
Depending on use, the handheld mic may only need charging every 1-2 weeks
(approx. 8 hours use).
It is necessary to charge batteries before first use. The initial charge should take about 20
hours, thereafter charge overnight as required.
To conserve power always remember to switch the transmitter off when not in use.
Remember to switch off the handheld mic before charging.
Use the external charger 45IRTXHCHG2
plugged into a mains socket. Charge time
is 16-20 hours from flat (i.e. overnight).
Charge
socket
2.1mm
plug
Power status:
green light = good
red light = recharge now
no light = dead batteries
On/off (mute)
switch
IR emitter
IR emitter

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Channel change
Most users will never need to change the channel of the handheld microphone. If one
SwiftTX and one handheld mic are being used, there will be no need to change channels.
More than one pendant or handheld microphone transmitter can be used on either channel
for team teaching as long as only one is switched on at any one time.
To use two of the same type of microphone simultaneously,
then one will need to have its channel changed.
The handheld transmitter is normally used on channel B.
However, if required, it can be changed to channel A as follows:
Unscrew the battery cover and the switches will be easy to see
just above the battery compartment.
Use the end of a paperclip or a small screwdriver to slide the
channel switch between channel A and channel B as required.
Please note that the label fitted to the outside of the
battery compartment indicates the switch positions as
‘CH1’ (= Channel A) and ‘CH2’ (= Channel B).
Hi CH2 (B)
Default setting:
The left hand switch should always be left on ‘Hi’.
Right battery ‒ exposed end
This battery is fitted with the
exposed metal end against
the spring and the side
contact.
High capacity rechargeable AA
battery ‒ exposed end
(MBRAAHX1E) .
Pull out the old batteries. Replace
with two new rechargeable
batteries, taking care to place the
battery with the exposed end in
the side with the spring at the
mic head end and the contacts
beside the spring. This is
essential for correct charging.
Screw cover back on.
Changing the rechargeable batteries
The rechargeable batteries will only need replacing very occasionally ‒ depending on use.
They will last between 1-2 years.
Side contact
Left battery
High capacity
rechargeable
AA battery
(MBRAAHX4 ‒ pack of 4).
To open the battery compartment, unscrew
the metal sleeve below the switch and slide
the cover off.
Exposed
metal end
Azden IRR-40P Soundfield

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
An overview of the installation steps are:
1) Charge batteries for testing purposes.
2) Fitting the speakers
3) Fitting the Infra Red sensors.
4) Mounting the IRR-40P
5) Setting up and testing the system.
6) Demonstrate and set the volume level for the user.
1. Charge batteries now
The rechargeable batteries inside your transmitter require charging before use. In order
to be able to test the system once it is installed, we recommend you start charging the
transmitter before carrying on with the installation.
Even an hour or so will give enough charge to test the system ‒ 1 hour charge gives
40mins use.
IRR-40P Installation Guide
2. Fitting the speakers
Four wall- mounted speakers are installed and a wire is run
from each of the speakers to one of the 4 SPEAKER terminals
pairs on the back of the receiver.
Please do not think home hi-fi and put the speakers in
the corners, at waist level and point them to the centre
of the room ‒ this is the worst possible thing to do!
Placing loudspeakers for a classroom soundfield is more
like deciding how best to light a room using 4 small
lamps. If you think ‘light’ you will not go far wrong, i.e.
fitted above head height (2 to 2.5 metre high) each over
a 1/4 of the room pointing down on the area to be
covered.
The positioning of speakers is often dictated by physical
objects such as windows. You have to fit 4 speakers so
adapt your ‘lighting’ plan to give the best pattern for the
students ‒ perhaps avoiding the window, an unused end
of a classroom or a teachers desk.
window
Speaker position allowing for a window

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
3. Fitting the infra red sensors
The infra red sensor picks up both direct and reflected signals. The 360°ceiling
mounted sensor included as standard will adequately cover most classrooms. A 150°
wall mounted sensor is available for coverage of ‘dead end’ or non reflecting areas.
Normal room:
1 dome sensor
L-shaped room:
1 dome sensor + 1 wall sensor
Large room: 2 dome sensors
360°150°
The infra red sensors need to be positioned so that they provide coverage of the
whole room. In large or strangely shaped rooms it may be necessary to fit additional
sensors.
The dome sensor is normally fitted near the centre of the room and as far away from
lights or other obstructions as possible.
Azden IRR-40P Soundfield

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
Solid ceiling ‒ direct or with mounting box
1 The mounting plate
can be bent to
allow space for the
F-connector and
cable and screwed
directly to the
ceiling.
2If a mounting box is used, the box is fitted
directly to the ceiling and the sensor is fitted
to the lid as shown.
The cable exit hole is drilled by the installer to
suit the trunking used.
The mounting box (pt no 45IRSDB) is available at
additional cost.
Wall mounted sensors
Wall mounted sensors should be mounted between
2 and 2.5m above the floor, preferably not higher than the
loudspeakers.
The bracket for the wall mounted sensor needs to be bent
70mm from the flat end of the bracket.
Suspended ceiling
The mounting plate can be removed
and used as a template for drilling
holes in the ceiling tiles.
70mm
Mounting the infra red sensors
Dome sensor mounting is dependent on the type of ceiling in the classroom.

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
4. Mounting the IRR-40P receiver amplifier
Usually, the IRR-40P receiver is installed near the front of the room,
on a convenient shelf.
An optional wall mount bracket is available.
To avoid expensive damage, check assembled cables for short circuits before
connecting to the IRR-40P amplifier.
Sensors can be connected to either plug on the back of the IRR-40P amplifier. When
wired properly, a red LED on the sensor will light when the system is turned on.
The infra red sensors are connected to the IRR-40P amplifier using the provided
co-ax cable and F-connectors. Place the boot on the amplifier end of the cable
before stripping!
1. Cut back 15mm of outer casing. Fold back
the copper braid and remove the foil.
2. Cut back the inner insulator to leave 9mm
of the copper core protruding.
3. Screw the F-connector onto the cable. The
end of the inner insulator should be flush
with the inside of the connector.
4. Trim off any visible braiding.
Screw the plug to either connector
on the back of the IRR-40P and pull
the boot over the connection.
Fitting the F-connectors
Wall mount bracket
4530BKT

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
5. Setting up and testing the system
Checking the operation of the IRR-40P amplifier and speaker system
The easiest way to check the system is to connect a portable radio, MP3 or CD player
into one of the auxiliary inputs (numbered 1 and 2). Adjust the appropriate volume to a
suitable level and walk around the room, checking for a reasonably
constant sound level and lack of distortion or buzzing from any
particular speaker. Buzzing or distortion from a particular speaker
may indicate a faulty speaker or loose mount.
A 3.5mm to phono plug pair lead is supplied in the Connevans
Soundfield AV lead pack (45SIBPK1) if this has been purchased.
15 0 m m
Swift TX pendant microphone transmitter:
Place round neck and adjust neckstrap to
correct length.
Check the transmitter
As long as the transmitter has been on charge for at least 30 minutes, you will have
enough charge in the batteries to test and demonstrate the system.
Switch the
Swift TX transmitter on. Check that the left Channel 1 green LED lights.
Ensure the microphone is positioned about 150mm from the mouth and talk whilst
increasing the Channel 1 volume on the IRR-40P until you can hear it clearly without
causing feedback whistling.
Walk around the room whilst talking. There should be no places where the sound cuts
out or sounds noisy. This is much easier to do if you can find someone else to listen to
the sound whilst you walk around the room.

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
6. Demonstrate and set the volume level
for the user
It is important that the soundfield is set up properly.
We have found that most users tend to set the
system too loud. This is unnecessary and undesirable.
The golden rule is ‘if the user of the transmitter can hear themselves
very clearly from the speakers, then the volume is too loud’. It is difficult for the person
talking to judge the level of their own amplified voice.
There are two ways to set up a soundfield properly; one uses a sound level meter and
the other relies on the subjective judgement of another person. Both methods require
two people with the class teacher preferably being the one doing the talking.
Setting the correct volume level
This is normally only necessary upon installation. In normal use, from person to person,
it is not necessary to alter the volume since the sound out of the speakers should be
about the same as directly from the person talking. However, if a
particular user has a quiet voice then the transmitter may be moved
nearer to the mouth.
lWear the microphone as shown.
lWalk to the point in the room furthest away from the IRR-40P
and invite a colleague to join you.
lSwitch the transmitter off for the moment.
lTalk in a normal voice to your colleague while they stand about
1 metre in front of you.
lAsk your colleague to remember the average sound level by
either....
a) Using a sound level meter
or
b) Remembering the sound level by ear
....and then get them to walk over to the IRR-40P amplifier.
lSwitch the transmitter on.
lAsk your colleague to increase the 'Channel 1' volume control on the amplifier,
whilst you continue to talk in the same normal voice as before, until either....
a) the sound level shown by the meter at where they are standing is the same
average value as when they were standing in front of you.
b) until they judge the sound level at where they are standing to be about the
same as when they were standing in front of you.
lThe tone control can now be adjusted if necessary to optimise vocal clarity.
MXY139A

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Azden IRR-40P ‒ User & Installation Guide B460IRR40P V1.0
Azden IRR-40P Soundfield
lAsk your colleague to walk around the room listening to
make sure that your voice is clear all around the room.
Job done! Don't be tempted to increase the volume much
further as teachers tend to raise their voices in an active
classroom situation!
Once the installation has been carried out, please do not
underestimate the importance of ensuring that the teacher
has the opportunity to experience listening to another
person using the system. There are two reasons for this: firstly so that they become
impressed at the natural sound and secondly it is hard for anyone to listen objectively
to their own voice. It is also an excellent opportunity to ‘play’ at using the system with a
colleague, allowing the teacher to gain confidence with their own ‘performance’.
If the system has been supplied with a handheld microphone you must now go
through the same procedure with this microphone using the ‘Channel 2’ volume
control.

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B460IRR40P V1.0 Azden IRR-40P ‒ User & Installation Guide
Azden IRR-40P Soundfield
Troubleshooting:
If the IRR-40P does not operate as expected check the following:
Symptom Probable cause/remedy
Main unit
No red indicator light Unit unplugged, switched off or fuse blown
No green 'Signal' indicators Transmitter unit not functioning ‒ check led
indicator on transmitter
Microphone transmitters ‒ all types unless specified
No light on transmitter Batteries dead or incorrectly fitted
Alternating green/red light on
Swift TX pendant transmitter Batteries need recharging
Red light on handheld transmitter Batteries need recharging
Green light on transmitter
but no green light on wall unit
Receiver not receiving the IR signal
‒ Check that microphone emitters are not covered
or pointing into non-reflective area
‒ Check dome sensor is not obstructed and look for
red LED in centre. No red LED indicates no
connection between sensor and wall box so check
wiring on F-plug connectors
No red light on infra red sensor Coaxial cable connections faulty or internal fault
caused by short circuit
Distorted, whistling and generally
nasty sound
Two transmitters on the same channel will cause this
‒ turn one off. Has your colleague from next door
come in wearing their transmitter?
Feedback whistling all the time or
when the user of the transmitter
speaks
‘Mic’ volume too high. Microphone too far away
from user's mouth
Sound too bright or boomy Adjust the tone control to suit the acoustics of the
room and speakers
Sound distorted
Reduce the volume of the appropriate channel.
The system is only intended for speech and
music in an average size classroom giving up to
about 90dB SPL
Handy hint: You can easily check if the transmitter emitters are working by pointing a
mobile phone camera at them ‒ you don’t need to take the photo but the emitters will
show up really clearly!
The camera will see the infra red light from the emitters.