Chamberlain LiftMaster 833-1LM User manual

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Carton Inventory
Overview
The Intercom has up to a 1000' range and allows
multiple simultaneous conversations, using a
900 MHz secure digital radio link. The intercoms form
an exclusive network and respond only to other
intercoms in the network.
Intercom Models
833-1LM (1)
833-2LM (2)
1
Rubber Pads
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Operation & Features
Channel Select Button:
Press the Channel Select button
to set intercom to one of four
secure channels or the paging
channel. The default channel for
the intercom is the paging channel
where all four channel lights are
lit. An intercom on a channel can only hear an
intercom on the same channel or on the paging
channel.
Battery: The AA Alkaline batteries
(not provided) will last up to a year
depending on use. When batteries
are low intercom will emit three
beeps every ten minutes.
A DC Adapter (not provided) can
also be used to power the
intercom. In this case, the channel
lights will remain on.
Conference Mode: Conference Mode allows multiple
intercoms to participate in a conversation compared
to Normal Mode in which only two intercoms
can communicate. All intercoms must be set to
the same channel or the paging channel to be
in Conference Mode. To put intercom in
Conference Mode set Dipswitch #2 to UP
position.
Monitor Mode: Monitor Mode is
used to monitor the noise in a
specific room. Place the intercom
in the room that is to be monitored
and press the Monitor button until
a tone is heard. For extended
Monitor usage, consider using a plug-in transformer.
Any other networked intercom can listen to that room.
If a specific channel is selected for Monitor Mode
then only other intercoms on that channel or on the
paging channel can listen. Press the Talk button to
exit Monitor Mode. A tone will be heard indicating
Monitor Mode is no longer active.
Voice Activation Mode (VOX): Voice Activation
Mode (VOX) allows a call to be answered without
pressing the Talk button. Once a call is heard on an
intercom which has been set to VOX, a response can
be given by speaking loudly into the intercom. There
will be a slight delay when VOX is first activated by a
voice, but will continue to transmit audio until the
speaking stops. To put intercom into VOX,
place Dipswitch #1 to the UP position. While
in VOX mode, a call may be initiated by
pressing the TALK button.
On/Off: To turn intercom ON, press Talk button.
To turn intercom OFF, hold down the Volume DOWN
button for 3 seconds.
Talk Button: To talk, hold down
the Talk button. All intercoms in
the network that are on the same
channel will receive the signal.
Release the Talk button when
done talking and within 10-15
seconds press and hold the Talk
button of a different intercom to make a secure
channel between the two. Once the channel is made
the other intercoms in the network cannot hear the
conversation.
Volume: Pressing the Volume DOWN button will
lower the volume and pressing the Volume UP button
will increase the volume.
Volume
UP
Button
Talk
Button
Learn Button
Dipswitch #1
Dipswitch #2
AC Adapter
Wireless Portable Intercom
Models 833-1LM with one intercom
833-2LM with two Intercoms
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OPTIONAL
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Channel
Select Button
Channel
Lights
Active Light
Volume
DOWN
Button
Monitor
Button
Speaker
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2
Assemble Intercom
Step 1
Step 2
Install 4 AA Alkaline batteries (not provided).
Programming Intercom
Adhere rubber pads to bottom.
Repeat Steps 1 and 2 for any additional intercoms.
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The intercom must be programmed to at least one
other intercom to become a network or it can be
programmed into an existing network.
Create New Network
Before programming, clear memory on all intercoms.
Press the Learn button on the new intercom until a
beep is heard. Within 10 seconds put the second
intercom into Learn Mode (refer to the following table).
Add to an Existing Network
Press the Learn button on the new intercom until a
beep is heard. Within 10 seconds put any networked
intercom into Learn Mode (refer to table below).
Press and release the Talk button to verify network is
complete.
INTERCOM LEARN MODE
Press the Learn button
until a beep is heard.
OR
Each intercom will emit a tone when entering
programming mode. It may take up to 3-1/2 minutes
for a secure network to be established. Repeat for
any additional intercoms.
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Each intercom will emit a tone when entering
programming mode. It may take up to 3-1/2 minutes
for a secure network to be established. Repeat for
any additional intercoms.
NOTE: Do not program new intercoms to each other
before adding them to the network or they will form a
separate network and the memory will need to be
cleared.
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INTERCOM LEARN MODE
Press the Learn button
until a beep is heard.
OR
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Troubleshooting
3
Intercom does not function.
Check batteries in intercom. If using a DC Adapter
ensure that it is plugged in.
Ensure intercom is connected to a network.
See Programming Intercom.
Ensure that intercoms are on the same channel.
See Operation & Features.
Intercom is not getting expected transmission
range.
Keep antenna vertical. Keep intercom away from
metal objects and electrical wiring. Cell phones,
cordless phones, or other radio devices may also
limit range.
Intercom beeps every ten minutes.
The battery is low in the intercom. Replace with
AA Alkaline batteries or operate it with DC Adapter
(not provided). A 12 volt, 300mA DC Adapter may
be used (center positive polarity on the round plug).
Static and feedback is heard in intercom.
The intercoms are too close to each other. A cordless
phone, cell phone, or other radio devices can also
cause static.
The intercom does not connect to another
intercom and a green light is on longer than
3-1/2minutes.
The intercom is out of range. Place the intercom
closer to the other intercoms in the network, with the
antenna pointing up.
The other intercom in the network has no power.
Replace the batteries.
The intercom has not completed programming.
Clear the intercom's memory and reprogram.
Need to clear intercom’s memory.
Press and hold Learn button, an initial beep will be
heard. Continue to hold until a second beep is heard
(about 6 seconds). Ensure other intercoms are not
activated during this time. Once memory is clear the
intercom can be programmed to a new network.
Intercom is sending audio while no buttons are
pressed.
The sending intercom is set to Monitoring Mode or Voice
Activation Mode and will activate when sound is heard.
It can be taken out of Monitoring Mode by pressing the
Talk button. It can be taken out of Voice Activation Mode
by setting Dipswitch #1 to DOWN position.
See Operation & Features.
Intercom can not be programmed to network.
A network may contain up to 12 intercoms or doorbells.
It may be necessary to clear the network and
reprogram all the intercoms to the network.
See Programming Intercom.
NOTE: Manufacturer is not responsible for any radio or
TV interference caused by unauthorized modifications to
this equipment. Changes or modifications not expressly
approved by the manufacturer could void the authority to
operate the equipment.

© 2010, The Chamberlain Group Inc.
114A4111B All Rights Reserved
NOTICE: To comply with FCC and or Industry Canada rules (IC), adjustment or modifications of this
receiver and/or transmitter are prohibited, except for changing the code setting or replacing the battery.
THERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Optional Accessory
41B238 12 Vdc 300mA Adapter
One Year Limited Warranty
The Chamberlain Group, Inc. warrants to the first retail purchaser of this product that it is free from defect in materials
and/or workmanship for a period of 1 year from the date of purchase.
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 reasonable protection against harmful interference in a residential
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.
FOR TECHNICAL SUPPORT DIAL OUR TOLL FREE NUMBER:
1-800-528-9131
www.liftmaster.com