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© 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.

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www.liftmaster.com

Summary of Contents for LiftMaster 833-1LM

Page 1: ...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paging channel can listen Press the Talk button to exit Monitor Mode A tone will be heard indicating Monitor Mode is no longer active Voice Activation Mode VOX Voice Activation Mode VOX allows a call to be answered without pressing the Talk button Once a call is heard on an intercom which has bee...

Page 2: ...e 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 M ON IT OR HO LD OF F 1 3 2 4 V O LU M E TA LK A C TI VE M ON IT OR HO LD OF...

Page 3: ... 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...

Page 4: ... 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 Ho...

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