Sennheiser Headphones Set 840 User Manual

Wireless TV Listening System  
Set840-  
TV  
Instruction manual  
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I
1
1
2
4
3
5
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II  
B
6
A
7
0
8
9
G
F
E
D
C
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Contents  
Contents  
Safety instructions ................................................................. 2  
Delivery includes ..................................................................... 4  
Product overview .................................................................... 5  
Setting up the transmitter ............................................... 6  
Using the Set 840-TV system ............................................ 12  
Switching the transmitter on/off ................................. 12  
Switching the receiver on/off ........................................ 13  
Adjusting the volume ...................................................... 14  
Searching for a sound source ......................................... 14  
Changing the transmission channel ............................. 15  
Adjusting the balance ..................................................... 16  
Storing and charging the receiver ................................ 18  
transmitter’s charging compartment .......................... 19  
What if ... ................................................................................ 20  
... this indicator lights up? .............................................. 20  
... you press this button? ................................................ 21  
Cleaning the Set 840-TV system ....................................... 23  
Cleaning the ear pads ...................................................... 23  
If a problem occurs ... ........................................................... 24  
Additional technical information ...................................... 26  
Accessories and spare parts ............................................... 28  
Specifications ........................................................................ 29  
Manufacturer Declarations ................................................. 31  
Index ........................................................................................ 33  
1
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Safety instructions  
Safety instructions  
Please read this instruction manual carefully and completely before  
using the products.  
Make this instruction manual easily accessible to all users at all  
times. Always include this instruction manual when passing the  
products on to third parties.  
Do not use the products in situations which require special atten-  
tion (e.g. when performing skilled jobs).  
Always keep the products dry and do not expose them to extreme  
temperatures.  
Use the products with care and set them up in a clean, dust-free  
environment.  
Varnish or furniture polish may degrade the feet of the transmitter,  
which could stain your furniture. You should therefore place  
the transmitter on a non-slip pad to avoid potential staining of  
furniture.  
Always maintain a distance of at least 3.94“ (10 cm) between the  
ear cups and the cardiac pacemaker or implanted defibrillator since  
the product generates permanent magnetic fields.  
This stethoset receiver allows you to set higher volumes than  
conventional headphones. This can cause hearing damage in  
persons with healthy hearing and especially in children.  
Refer all servicing to qualified service personnel. Servicing is  
required when the apparatus has been damaged in any way, such  
as power supply cord or plug is damaged, liquid has been spilled or  
objects have fallen into the apparatus, when the apparatus has  
been exposed to rain or moisture, does not operate normally, or has  
been dropped.  
WARNING: To reduce the risk of fire or electric shock, do not expose  
the products to rain or moisture.  
Use only the supplied mains unit.  
Disconnect the mains connector from the wall socket  
– to completely disconnect the products from the mains,  
– during lightning storms or when unused for long periods of time.  
Ensure that the mains unit is  
– always readily operable and easily accessible,  
– properly plugged into the wall socket,  
– not covered or exposed to direct sunlight for longer periods of  
time in order to prevent heat accumulation,  
– only operated within the permissible temperature range (see  
– not operated near heat sources.  
2
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Safety instructions  
Intended use  
Intended use includes  
having read this instruction manual, especially the chapter “Safety  
using the products within the operating conditions and limitations  
described in this instruction manual.  
“Improper use” means using the products other than as described in  
this instruction manual, or under operating conditions which differ  
from those described herein.  
Safety instructions for the Lithium-Polymer rechargeable battery  
The BA 300 is a Lithium-Polymer rechargeable battery. If abused or  
misused, this rechargeable battery may be damaged. Please under-  
stand that Sennheiser does not accept liability for damage arising from  
abuse or misuse.  
WARNING! In extreme cases, the rechargeable battery may even  
present a  
heat hazard,  
fire hazard,  
explosion hazard,  
smoke and gas hazard.  
Only charge rechargeable  
batteries with the  
appropriate Sennheiser  
chargers.  
Do not heat above  
70°C/158°F, e.g. do  
not expose to sunlight  
or throw into a fire.  
Return defective devices  
or exhausted recharge-  
able batteries to your  
specialist dealer.  
When not using the  
rechargeable battery for  
extended periods of time,  
charge it regularly (every  
6 months for about 1 hour).  
Do not short-circuit.  
Only charge rechargeable  
batteries at ambient  
temperatures between  
10°C/50°F and 40°C/104°F.  
Do not mutilate or  
dismantle.  
Do not charge the recharge-  
able battery if the device is  
obviously defective.  
Store the devices/  
Do not expose to moisture.  
rechargeable batteries in  
a cool and dry place at  
room temperature.  
3
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Delivery includes  
Delivery includes  
The Set 840-TV system is available as an EU and a  
US version. The following table shows which items are  
included with the respective version.  
Components of the Set 840-TV system  
EU US  
1
1
1
RR 840 stethoset receiver with BA 300  
Lithium-Polymer rechargeable battery  
TR 840 transmitter with integrated  
charging compartments  
NT 9-3AW mains unit with  
2 country adapters (EU, UK)  
1 country adapter (US)  
1
connection cable  
with two 3.5 mm stereo jack plugs  
for connection to a headphone socket  
1
1
audio adapter  
(3.5 mm to ¼” (6.3 mm) jack plug)  
audio adapter for RCA socket  
(e.g. TB/Aux-Out)  
1
1
2
1
1
audio adapter for SCART socket  
MKE 800 TV-N microphone  
pairs of spare ear pads  
instruction manual  
installation manual  
4
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Product overview  
Product overview  
The overview pictures of the stethoset receiver and the  
transmitter can be found on the inside front cover of this  
instruction manual.  
Stethoset receiver  
I
1
2
3
4
5
Channel indicator  
Volume control  
Balance control  
Channel search button  
Battery compartment  
Transmitter  
II  
6
7
Charging compartment for receiver  
Charging compartment for optional spare  
rechargeable battery  
8
9
0
Charging indicator for optional spare  
rechargeable battery  
Charging indicator for receiver’s  
battery  
Operation indicator  
A “Speech intelligibility” button  
B Indicator for the selected speech intelligibility  
C Socket (marked blue) for connection of sound  
source or external microphone  
D ST/MO slide switch (stereo/mono)  
E Treble adjustment control  
F
Channel selector switch  
G DC socket (marked yellow) for connection of  
mains unit  
5
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Putting the Set 840-TV system into operation  
Putting the Set 840-TV system into  
operation  
Setting up the transmitter  
̈ Choose a suitable place near your sound source (e.g. TV).  
̈ Do not place the transmitter close to metal objects such  
as shelf bars, reinforced concrete walls, etc. as this can  
decrease the transmitter’s range.  
It is not necessary that the transmitter and stethoset  
receiver are in the same room, so you can move around  
freely in the home or outside in the garden.  
When the stethoset receiver leaves the range of the trans-  
mitter, it produces warning signals and then automatically  
switches off after 3 minutes.  
One transmitter can be used to transmit to several  
stethoset receivers on the same frequency.  
6
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Putting the Set 840-TV system into operation  
Connecting the transmitter to a sound source  
̈ Switch your sound source (e.g. TV) off before connecting  
the transmitter.  
C
I
̈ Plug one end of the connection cable I into the blue  
socket C of the transmitter.  
̈ Check the available connection possibilities of your  
sound source (e.g. TV):  
Connection possibility Name of connection possibility  
Headphone socket  
RCA socket  
A
B
C
L
R
SCART socket  
(SCART adapter included with  
the EU version)  
What if your sound source doesn’t have any of these  
connection possibilities?  
MKE 800 TV-N external  
microphone  
D
(included with the US version)  
̈ Connect the transmitter as described in the corres-  
ponding chapter or  
,
,
.
A
B
C
D
If possible, use the SCART connection  
.
C
SCART adapter and microphone are also available as  
accessories (see page 28).  
7
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Putting the Set 840-TV system into operation  
Connecting the transmitter to a headphone socket  
A
̈ Plug the other end of the  
connection cable I into the  
headphone socket on your  
sound source.  
J
I
Is the plug on the connection  
cable too small for the head-  
phone socket?  
̈ Plug the adapter to ¼”  
(6.3 mm) jack socket J onto  
the connection cable I .  
̈ Adjust the volume of the headphone socket on your  
sound source to a medium level.  
This improves the quality of wireless sound transmis-  
sion. For detailed information, please refer to the  
instruction manual of your sound source (e.g. TV).  
With most TVs, the headphone socket is located at  
the front or sides.  
Connecting the transmitter to an RCA socket  
B
̈ Plug the audio adapter for  
RCA socket K onto the con-  
nection cable I .  
K
̈ Connect the red connector of  
I
the audio adapter  
K
to the red  
RCA socket R of your sound  
source.  
̈ Connect the white connector  
of the audio adapter K to the  
white or black RCA socket L of  
your sound source.  
With most TVs, the RCA socket is located at the rear.  
If your TV has several RCA sockets, use the socket  
RCA output.  
8
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Putting the Set 840-TV system into operation  
Connecting the transmitter to a SCART socket  
C
̈ Plug the SCART adapter L  
L
I
onto the connection cable I .  
̈ Connect the SCART adapter L  
to the SCART socket on your  
TV.  
If your TV has several SCART sockets, use the socket  
SCART output.  
Using the MKE 800 TV-N external microphone  
D
What if your sound source doesn’t have any of the connec-  
tions mentioned above? You can then use the optional  
MKE 800 TV-N microphone.  
What if your sound source mutes the external loud-  
speakers if you use one of the connections mentioned  
above?  
̈ Via the operating menu of your TV, check if the muting  
can be deactivated.  
̈ If the muting persists, use the optional MKE 800 TV-N  
microphone instead of the connection cable.  
C
9
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Putting the Set 840-TV system into operation  
To connect the MKE 800 TV-N microphone:  
̈ If possible, adhere the supplied Velcro tape directly in  
front of the loudspeaker of your TV.  
̈ Press the microphone onto the Velcro tape.  
̈ Connect the jack plug of the microphone to the blue  
socket C of the transmitter.  
You can change the sound by varying the position of  
the microphone in front of the loudspeaker.  
10  
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Putting the Set 840-TV system into operation  
Connecting the transmitter to the mains  
The EU and UK country adapters are included with the EU  
version of the Set 840-TV; the US country adapter is  
included with the US version of the Set 840-TV.  
̈ Slide the supplied country  
M
adapter N onto the mains  
unit M.  
̈ Connect the yellow connector  
of the mains unit to the yellow  
socket G of the transmitter.  
EU  
UK  
US  
N
̈ Plug the mains unit M into a  
wall socket.  
G
The operation indicator 0  
on the transmitter lights up  
green.  
M
When connecting the transmitter to the mains for  
the first time, charge the rechargeable battery for  
3 hours as described in the chapter “Storing and  
3h  
If there is no audio signal from the sound source  
for about 3 minutes, the transmitter automatically  
switches off. The operation indicator 0  
goes off.  
To disconnect the transmitter from the mains, pull  
out the mains connector from the wall socket.  
When not using the transmitter for extended periods  
of time (e.g. when you are on holiday), pull out the  
mains connector from the wall socket. In this case,  
however, the receiver’s rechargeable battery will not  
be recharged.  
11  
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Using the Set 840-TV system  
Using the Set 840-TV system  
To switch the Set 840-TV system on, proceed as follows:  
Sequence of steps  
Page  
1. Switch your sound source (e.g. TV) on.  
2. Adjust the volume on the receiver to a low level. 14  
3. Switch the receiver on.  
4. Adjust the desired volume on the receiver.  
5. If necessary, set a different channel on the  
transmitter.  
Switching the transmitter on/off  
To switch the transmitter on:  
̈ Switch your sound source on.  
The transmitter automatically switches on. The opera-  
tion indicator 0 lights up green.  
If the transmitter doesn’t switch on:  
̈ Read the corresponding chapter on page 24.  
To switch the transmitter off:  
̈ Switch your sound source off.  
The transmitter automatically switches off after  
3 minutes. The operation indicator 0  
goes off.  
12  
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Using the Set 840-TV system  
Switching the receiver on/off  
CAUTION! Hearing damage due to high volumes!  
This receiver allows you to set higher volumes  
than conventional headphones. This can  
cause hearing damage in persons with  
healthy hearing and especially in children.  
̈ Before putting the receiver on, set the  
volume on the receiver to a low level.  
̈ Do not continuously expose yourself to  
high volumes.  
Switching the receiver on  
The receiver automatically switches  
on when you pull the earbows  
apart.  
Putting the receiver on  
̈ Put the receiver on the correct  
way round, with the Sennheiser  
logo facing away from your  
body.  
The ear pads adapt to the ear  
form and thus increase the  
wearing comfort.  
Switching the receiver off  
̈ Take the receiver off.  
The receiver automatically switches off after 30 seconds.  
If you are not within the range of the transmitter, the  
receiver automatically switches off after 3 minutes.  
For how to store and charge the receiver, refer to page 18.  
13  
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Using the Set 840-TV system  
Adjusting the volume  
̈ Use the volume control 2 to  
adjust the volume to a sufficient  
and comfortable level.  
Searching for a sound source  
̈ Put the receiver on.  
The receiver automatically searches for one of the  
3 channels of the transmitter and starts the channel  
search on the last selected channel. If a channel is found,  
the channel search stops.  
Your hear the sound of the sound source found.  
Depending on the channel found, the receiver produces  
1, 2 or 3 beeps (see page 22) and the channel  
indicator 1 on the receiver lights up as follows:  
The channel indicator 1 goes off after 30 seconds so  
that the light won’t disturb you in a dark room.  
14  
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Using the Set 840-TV system  
What if you don’t hear the desired sound source?  
The channel search has possibly found another sound  
source (e.g. from another nearby system).  
To continue the channel search:  
4
̈ Press the channel search  
button 4 on the receiver  
repeatedly until you have  
found your sound source.  
If you still cannot find your sound source:  
̈ Change the transmission channel as described in the  
next chapter.  
Changing the transmission channel  
If several transmitters are operated simultaneously and are  
very close to one another, reception can be subject to inter-  
ference (e.g. hissing noise).  
̈ Change, if necessary several  
times, the position of the  
channel selector switch F on  
the transmitter to change to  
an interference-free channel.  
You can choose between  
F
3 channels.  
̈ Press the channel search button 4 on the receiver to re-  
start the channel search.  
If reception is still subject to interference :  
15  
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Using the Set 840-TV system  
Adjusting the balance  
The balance control allows for right/  
left volume adjustment. Adjust the  
balance so that you hear equally well  
with both ears.  
3
̈ Turn the balance control 3 to the  
left L or right R in order to increase  
the volume for the corresponding  
ear.  
Switching between mono and stereo operation  
If, despite a correct balance adjustment, you can hear the  
sound only with one ear:  
̈ Set the ST/MO switch D  
on the transmitter to MO  
(mono).  
D
Meaning of the terms “mono” and “stereo”  
Stereo (ST)  
Mono (MO)  
L
R
L + R  
Example: L: Speech from the left  
R: Music from the right  
You hear speech from  
the left and music from  
the right.  
You hear speech and music  
coming from the front.  
16  
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Using the Set 840-TV system  
Individually enhancing the speech intelligibility  
The “speech intelligibility” button  
B
allows you to adjust the  
A
sound to your individual needs.  
Try out which setting works best  
for you.  
̈ Press the “speech intelligibility” button A repeatedly  
until the sound is optimally adjusted to your needs.  
Press the  
button  
1 x  
2 x  
3 x  
4 x  
Indicator B  
is lit yellow  
Setting  
1
2
3
Default setting  
If necessary, you can have the speech intelligibility fine  
adjusted to your hearing ability (see page 26).  
17  
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Using the Set 840-TV system  
Storing and charging the receiver  
Do not store the receiver on a glass dummy head, chair  
armrest, or similar for long periods of time as this can  
reduce the contact pressure of the earbows. Furthermore,  
with the earbows pulled apart, the receiver remains  
switched on.  
̈ After use, place the receiver  
into the transmitter’s charging  
compartment 6 without exer-  
ting too much pressure.  
The receiver automatically  
switches off.  
The Sennheiser logo can face  
the operation indicator 0  
or away from it.  
When the receiver is placed cor-  
rectly into the charging compart-  
ment, the indicator 9 lights up:  
6
0
9
red:  
The battery is being charged.  
green: The battery is fully charged.  
With a fully charged battery, the operating time is up  
to 9 hours.  
The transmitter remains switched on during  
charging. If you have a second receiver, it can be used  
with the transmitter while the discharged first  
receiver is being charged.  
Always store the receiver in the transmitter’s  
charging compartment 6 to ensure that it is fully  
charged. The intelligent battery charging technology  
prevents overcharging.  
18  
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Using the Set 840-TV system  
Charging a rechargeable battery in the  
transmitter’s charging compartment  
You can charge the receiver’s rechargeable battery or a  
spare BA 300 rechargeable battery (not included in the  
delivery of the Set 840-TV) in the charging compart-  
ment 7 at the side of the transmitter.  
The spare battery offers extended listening time while the  
discharged first battery is being recharged.  
Before using the spare rechargeable battery for the  
first time, charge it for at least 3 hours.  
Removing and charging the receiver’s battery  
To remove the receiver’s battery:  
̈ Pull the battery out of the  
receiver’s battery compart-  
ment 5 .  
5
̈ Insert the receiver’s battery  
7
into the charging compart-  
ment 7 at the side of the  
transmitter as shown.  
8
When the battery is inserted correctly, the indicator 8  
lights up:  
red:  
The battery is being charged.  
The charging time is approx. 3 hours.  
green: The battery is fully charged.  
̈ Insert the battery into the  
receiver as shown.  
̈ Slide the battery into the  
battery compartment 5 as  
far as it will go.  
5
19  
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What if ...  
What if ...  
... this indicator lights up?  
Indicator  
Channel  
Status  
Meaning  
lit yellow The receiver has just  
been switched on or  
a button has just  
indicator 1  
on the receiver  
been pressed.  
flashes  
The distance between  
receiver and transmitter  
is too great.  
The receiver switches  
off after 3 minutes.  
off  
The receiver is switched  
on for more than  
30 secs. and no button  
has been pressed.  
The receiver is  
switched off.  
Operation  
indicator 0  
on the  
lit green The transmitter is  
switched on.  
off  
The transmitter is  
switched off.  
transmitter  
Charging  
indicator 9  
lit red  
The rechargeable  
battery is being  
charged.  
Charging  
indicator 8  
lit green The rechargeable  
battery is fully charged.  
“Speech  
lit yellow The speech intelligibility  
enhancement is  
intelligibility”  
indicator B on  
the transmitter  
switched on.  
off  
The speech intelligibility  
enhancement is  
switched off.  
20  
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What if ...  
... you press this button?  
Button  
Function  
Page  
Channel search  
button 4 on  
the receiver  
Searches for the sound  
source or a different channel  
“Speech  
intelligibility”  
Selects one of the possible  
settings in order to  
button A  
the transmitter  
on  
individually enhance the  
speech intelligibility  
... you change the position of this control/switch?  
Control/switch  
Volume control 2 Reduces or increases the  
on the receiver volume of the receiver  
Balance control 3 Increases the volume for  
Function  
Page  
on the receiver  
the left or the right ear  
Channel selector  
Selects a different  
switch F on the transmission channel  
transmitter  
ST/MO switchD  
on the transmitter mono or stereo operation  
Sets the transmitter to  
Treble adjustment Treble adjustment is only  
control E on the to be made by a hearing  
transmitter  
aid technician / an expert  
21  
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What if ...  
... you hear acoustic signals or warning signals?  
Acoustic signal  
Meaning  
1 acknowl-  
edgement  
beep  
The channel search  
button has been  
pressed once briefly.  
The channel search  
button has been  
pressed for 5 seconds.  
1–3 short  
beeps  
The receiver is set to  
channel 1, 2 or 3.  
Warning signal  
Meaning  
6 short beeps The receiver does not  
receive any signal  
from the transmitter:  
• The distance  
between trans-  
mitter and receiver  
is too great. The  
receiver switches  
off after 3 minutes.  
• The transmitter  
is switched off.  
2 long beeps The rechargeable  
battery is almost flat.  
To switch the acoustic signals on and off:  
̈ Press the channel search  
button 4 on the receiver for  
approx. 5 seconds.  
4
You hear a short acoustic signal.  
Warning signals cannot be switched off.  
22  
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Cleaning the Set 840-TV system  
Cleaning the Set 840-TV system  
Cleaning the transmitter and the receiver  
CAUTION! Danger of electric shock and damage to the  
device electronics!  
Liquids entering the housing of the devices  
can cause a short-circuit and damage the  
electronics.  
̈ Keep all liquids far away from the devices.  
̈ Do not use any cleansing agents or solvents.  
̈ Before cleaning, disconnect the transmitter from the  
mains.  
̈ Use only a slightly damp cloth to clean the devices.  
Cleaning the ear pads  
̈ Carefully remove the ear  
pads H from the receiver.  
H
̈ Clean the ear pads H with  
warm soapy water and rinse  
thoroughly.  
̈ Dry the ear pads H .  
̈ Put the ear pads back on the receiver.  
For reasons of hygiene, you should replace the ear  
pads H from time to time. Spare ear pads are avail-  
able from your Sennheiser dealer (see “Accessories  
23  
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If a problem occurs ...  
If a problem occurs ...  
The transmitter does not switch on  
Possible cause  
Solution  
Is the mains unit  
Check the connection of the  
connected correctly? mains unit to the transmitter  
and to the mains (see page 11).  
Is the sound source Switch your sound source on.  
switched on?  
Is the volume of  
the sound source  
sufficient?  
Set the volume on your sound  
source to a medium level.  
You cannot hear anything  
Possible cause  
Solution  
Is the transmitter  
placed close to  
metal objects?  
Choose a different place for  
the transmitter. Make sure that  
the transmitter is not placed  
close to metal objects.  
Are all connectors  
Check the connection between  
connected correctly? the transmitter and your sound  
source (see page 7).  
Is the operation  
Check if the transmitter  
indicator 0 lit?  
is switched on (see page 12).  
Is the volume of  
the sound source  
sufficient?  
Set the volume on your sound  
source to a medium level.  
Is the volume of the Increase the volume by turning the  
receiver sufficient?  
volume control 2 (see page 14).  
Is the rechargeable Remove the rechargeable battery  
battery inserted  
properly into the  
receiver and fully  
charged?  
and reinsert it into the receiver.  
If this doesn’t help: recharge  
the rechargeable battery  
(see page 18).  
24  
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If a problem occurs ...  
You hear the sound only with one ear  
Possible cause  
Solution  
Is the balance  
adjusted correctly?  
Turn the balance control 3 to the  
left or right (see page 16).  
Is the transmitter  
set to mono?  
Set the ST/MO switch D on the  
transmitter to mono (MO)  
(see page 16).  
The sound of your sound source is hardly intelligible  
Possible cause Solution  
Is the speech intelli- Press the “speech intelligibility”  
gibility enhance-  
ment out of adjust-  
ment?  
button A  
on the transmitter  
repeatedly until the sound is  
optimally adjusted to your  
needs (see page 17).  
Is there another  
transmitter  
Change the transmission channel  
(see page 15).  
operating in the  
proximity?  
Is the receiver still  
within the trans-  
mitter’s range?  
Move the receiver closer to the  
transmitter.  
The loudspeakers of your TV are muted  
Possible cause  
Solution  
Some TVs have a  
Via the operating menu of your TV,  
function that mutes check if and how the muting can be  
the loudspeakers  
when you connect a  
transmitter  
deactivated.  
Use a different audio socket on  
your TV or use the MKE 800 TV-N  
external microphone.  
If a problem occurs that is not listed in the above tables or if  
the problem cannot be solved with the proposed solutions,  
please contact your Sennheiser partner for assistance.  
25  
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Additional technical information  
Additional technical information  
Fine adjusting the speech intelligibility  
The speech intelligibility can be enhanced individually on the trans-  
mitter (see page 17). There are the following settings:  
Indicator B  
lit yellow  
Setting  
Fine adjustment  
Default  
setting  
No fine adjustment made  
1
2
3
Compression  
Treble boost  
Compression and treble boost  
Compression (settings 1 and 3)  
Deterioration of the ability to hear quiet sounds as well as loud ones is  
a typical symptom of old age. Compression compensates for these  
volume differences by boosting the volume of quiet sounds and  
reducing the volume of loud sounds if necessary.  
Compression seems to put the speech in the foreground, making it  
easier to understand.  
Compression is self-regulating; once it has been activated, it is not  
necessary to make any other settings.  
Treble boost (settings 2 and 3)  
Another typical age-related phenomenon is the deterioration of the  
hearing with regard to high frequencies. However, high frequencies are  
important for the intelligibility of speech.  
The treble boost makes the speech clearer and easier to understand.  
With the treble boost (settings 2 and 3), additional fine adjustment is  
possible using the treble boost control E at the rear of the transmitter.  
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Additional technical information  
̈ Use a screwdriver to turn the treble  
boost control E to the left or right  
until the sound can be heard very  
well.  
The position “0” corresponds to a  
minimum boost, the position “MAX”  
corresponds to a maximum boost, and  
the control is factory-preset to the  
medium position.  
E
Function of the treble boost control  
By means of the transmitter’s steplessly adjustable treble boost  
control E , the audio signal is boosted as shown in the diagram. The  
treble boost control E allows you to select one of the curves shown in  
the diagram below.  
dB  
20  
”MAX”  
10  
Factory preset  
”0”  
0.1  
1
10  
kHz  
27  
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Accessories and spare parts  
Accessories and spare parts  
CAUTION! Danger of damage to the device!  
Components from other manufacturers  
(e.g. for power supply or rechargeable  
battery) may cause damage to the device  
and will invalidate the warranty.  
̈ Use only original Sennheiser accessories  
and spare parts.  
For the Set 840-TV, the following receivers and stethoset  
receivers are available from your specialist dealer:  
Cat. No. Accessory/spare part  
EU version  
502025 RR 840 stethoset receiver  
502026 RR 840 S receiver  
US version  
502027 RR 840 stethoset receiver  
502014 RR 840 S receiver  
The following Set 840-TV accessories are available from  
your specialist dealer:  
Cat. No. Accessory/spare part  
500898 BA 300 spare rechargeable battery  
528123 Ear pads (silicone, black), 5 pairs  
528124 Ear pads (silicone, transparent), 5 pairs  
528125 Ear pads (foam, black), 5 pairs  
531428 10 swivel joints for ear pads  
500974 MKE 800 TV-N external microphone (mono)  
517627 Extension cable, 3 m (3.5 stereo jack plug)  
502710 L 300 10-10 charger  
28  
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Specifications  
Specifications  
System  
Modulation  
Carrier frequencies  
EU version  
US version  
Frequency response  
THD  
FM, stereo  
863.3/864.0/864.7 MHz  
925.95/926.8/927.5 MHz  
50 Hz–16,000 Hz  
< 1%  
Charging time for  
rechargeable battery  
approx. 3 hours  
Signal-to-noise ratio  
(1 mV, peak deviation) typ. 70 dB (A)  
Operating temperature 10°C to 40°C  
Transmitter  
RF radiated power  
EU version  
US version  
max. 10 mW (EIRP)  
max. 50 mV/m  
(at a distance of 3 m)  
Range  
EU version  
US version  
up to 100 m  
up to 100 ft  
Audio/microphone  
connection  
Power supply  
3.5 mm stereo jack socket  
9 V  
Max. current  
consumption  
EU version  
80 mA (w/o battery charging)  
70 mA (w/o battery charging)  
US version  
Max. power consump-  
tion (transmitter in  
conjunction with the  
NT 9-3AW mains unit)  
2.4 W (incl. battery and receiver  
charging and with switched-on  
transmitter)  
Standby consumption  
approx. 0.5 W  
(w/o battery charging)  
Weight  
approx. 260 g  
Dimensions  
approx. 112 x 146 x 58 mm  
29  
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Specifications  
Receiver  
Max. SPL  
125 dB (SPL)  
Power supply  
via BA 300 rechargeable Li-Pol  
battery (3.7 V / 150 mAh)  
Operating time  
Weight  
Dimensions  
up to 9 hours  
approx. 68 g (with BA 300)  
approx. 240 x 128 x 26 mm  
NT 9-3AW mains unit  
Nominal input voltage  
Mains frequency  
100 V~ to 240 V~  
50–60 Hz  
Nominal output voltage 9 V DC  
Nominal output current 300 mA  
Ambient temperature  
+5°C to +40°C  
In compliance with  
Europe:  
EMC  
EN 301489-1/-9  
Radio  
EN 301357-1/-2  
EN 60065  
Safety  
The devices can be operated license-free in most countries  
of the European Union.  
Approved by  
Canada:  
Industry Canada RSS 210  
IC: 2099A-840  
USA:  
FCC 47 CFR Part 15C  
FCC-ID: DMOSET840  
Transmitters that operate in the 863 – 865 MHz frequency  
range can be used licence-free in the following countries:  
AT, BA, BE, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS,  
IT, LI, LT, LU, LV, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK,  
TR, UA.  
The NT 9-3AW mains unit is certified in accordance with the  
legal safety requirements of Europe, the United States,  
Canada, China and Russia.  
30  
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Manufacturer Declarations  
Manufacturer Declarations  
Warranty  
Sennheiser electronic GmbH & Co. KG gives a warranty of  
24 months on this product.  
For the current warranty conditions, please visit our web-  
partner.  
FOR AUSTRALIA ONLY  
Sennheiser’s goods come with guarantees that cannot be  
excluded under the Australian Consumer Law. You are enti-  
tled to a replacement or refund for a major failure and  
compensation for any other reasonably foreseeable loss or  
damage. You are also entitled to have the goods repaired or  
replaced if the goods fail to be of acceptable quality and the  
failure does not amount to a major failure.  
This warranty is in addition to other rights or remedies  
under law. Nothing in this warranty excludes, limits or  
modifies any liability of Sennheiser which is imposed by  
law, or limits or modifies any remedy available to the  
consumer which is granted by law.  
To make a claim under this warranty, contact Sennheiser  
Australia Pty Ltd, Unit 3, 31 Gibbes Street, Chatswood NSW  
2067, Australia; Phone: (02) 9910 6700,  
All expenses of claiming the warranty will be borne by the  
person making the claim.  
The Sennheiser International Warranty is provided by  
Sennheiser Australia Pty Ltd (ABN 68 165 388 312), Unit 3,  
31 Gibbes Street, Chatswood NSW 2067, Australia.  
31  
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Manufacturer Declarations  
In compliance with the following requirements  
• WEEE Directive (2012/19/EU)  
Please dispose of the devices at the end of their  
operational lifetime by taking them to your local  
collection point or recycling center for such  
equipment.  
• Battery Directive (2006/66/EC)  
The supplied batteries or rechargeable batteries  
can be recycled. Please dispose of them as  
special waste or return them to your specialist  
dealer. In order to protect the environment, only dispose  
of exhausted batteries.  
CE Declaration of Conformity  
0682  
• R&TTE Directive (1999/5/EC)  
• EMC Directive (2004/108/EC)  
• Low Voltage Directive (2006/95/EC)  
• RoHS Directive (2011/65/EU)  
Before putting the devices into operation, please observe  
the respective country-specific regulations.  
32  
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Manufacturer Declarations  
Statements regarding FCC and Industry Canada  
This equipment complies with Part 15 of the FCC Rules and  
with RSS-210 of Industry Canada. Operation is subject to  
the following two conditions: (1) this equipment may not  
cause harmful interference, and (2) this equipment must  
accept any interference received, including interference  
that may cause undesired operation.  
This equipment has been tested and found to comply with  
the limits for a Class B digital device, pursuant to Part 15 of  
the FCC Rules. These limits are designed to provide reason-  
able protection against harmful interference in a residen-  
tial installation. This equipment generates, uses and can  
radiate radio frequency energy and, if not installed and  
used in accordance with the instructions, may cause  
harmful interference to radio communications. However,  
there is no guarantee that interference will not occur in a  
particular installation. If this equipment does cause  
harmful interference to radio or television reception, which  
can be determined by turning the equipment off and on,  
the user is encouraged to try to correct the interference by  
one or more of the following measures:  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and  
receiver.  
• Connect the equipment into an outlet on a circuit  
different from that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician  
for help.  
This class B digital equipment complies with the Canadian  
ICES-003.  
Changes or modifications made to this equipment not  
expressly approved by Sennheiser electronic Corp. may  
void the FCC authorization to operate this equipment.  
Before putting the equipment into operation, please  
observe the respective country-specific regulations!  
33  
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Index  
Receiver  
Adjusting the balance 16  
Adjusting the volume 14  
Automatic channel search 14  
Charging the receiver 18  
Cleaning 23  
No sound signal 24  
Operating elements 5  
Operating time 18  
Putting the receiver on/taking the receiver off 13  
Reception is subject to interference 15  
Searching for a sound source 14  
Sound is hardly intelligible 25  
Sound is only audible with one ear 25  
Storing the receiver 18  
Switching the acoustic signals off 22  
Switching the receiver on/off 13  
Rechargeable battery  
Charging the rechargeable battery 19  
Special functions  
Fine adjusting the speech intelligibility 26  
Treble boost control 27  
Terms  
Compression/treble boost 26  
Mono/stereo 16  
Transmitter  
Changing the channel 15  
Cleaning 23  
Connection to a headphone socket 8  
Connection to a SCART socket 9  
Connection to a sound source 7  
Connection to an RCA socket 8  
Connection to the mains 11  
Enhancing the speech intelligibility 17  
Installation 6  
Operating elements 5  
Switching between mono and stereo operation 16  
Switching the transmitter on/off 12  
Troubleshooting 24  
Using the MKE 800 TV-N external microphone 9  
Versions  
EU version 7  
US version 7  
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Sennheiser electronic GmbH & Co. KG  
Am Labor 1, 30900 Wedemark, Germany  
Publ.09/13  
528279/A03  
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