Question about Motorola AXU4100 (10 Channels) 2-Way Radio

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AXU4100 Manual or help

I have 2-AXU4100 that I use for business but have lost the users guide,
I need to change the channels, however they are locked on ch. 1
I remember part of the instructions, such a:
1. hold the button on the side of the radio
2. turn unit on
3. select channel..........

However they are locked w/ the circle with the line thru it.

I need to know how to unlock, change channel & change PL
the radios should be on ch. 1 freq 463.525 w/PL. 136.5

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Re: AXU4100 Manual or help


On a Motorola AXU Series (including the 4100):
1. To unlock, press the “D” button for about a second or until the circle is gone. The circle with the line thru is the keyboard lock indicator;
2. To change channel, you need to press either the arrow left or right in Normal Mode;
3. To change PL (assigned to a channel), don’t think this can be done by the user
4. To change Ch. 1 from 464.500 MHz (PL-67.0) to 463.525 (PL-136.5), don’t think this can also be done by the user.

Even the built-in Programming Mode Parameters do not have this option to change assigned frequencies and PLs. An external programming software using a PC may or may not allow this.

These radios came pre-loaded with its channels assigned with specific frequencies/PLs. As used in a Motorola AXU411, they are:

Channel Frequency PL
1 464.500 67.0
2 464.500 77.0
3 464.500 88.5
4 464.500 179.9
5 464.500 None
6 464.550 67.0
7 464.550 82.5
8 464.550 94.8
9 464.550 179.9
10 464.550 None

Hope this be of help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Posted on Dec 24, 2007

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