I have recently purchased an MC3000 desk set for my CDM1550. I have everything connected as shown in the manual using standard RG45 cable. However, I have no display or power on the desk set. I have checked the connection of the ribbon cable to the remote head connector plate and it is seated. The same ribbon powers the dash mount head just fine. I do not have ignition sense configured or jumped on this radio. Do I need to do so to use the desk set?
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CDM CDM1550 MC3000 Deskset
- Thread starter alexjusti
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I've done it without the ignition sense before.
Did you check the power to your junction box?
Did you check the power to your junction box?
Are you using an L3239 junction box or an L3208? Or are you wiring directly to the radio?
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I have power to the junction box. There's two solid indicators at all times. The indicators don't change when I attach the radio. Is the radio supposed to power on with the desk set or junction box attached?
Also, did you configure the MC3000 Radio Type to "LTR" instead of the default "Astro?"
I bought it used but it was already configured for use with a CDM1550.
The CAT5 pinout is not standard patch cable pinout. I think Motorola calls it mirror pinout.
Radio needs to be powered on separately. The MC3000 does not power the radio on.
I think my best bet will be to power the ignition sense and I'll have to replace the connector with the mirror pinout. I see what you're saying when I look at the manual.
Once you get the radio powered on, just plug in the MC3000 and the display will come up.
With the standard ethernet connector or with Motorola's mirrored pinout?
You have to use the mirror cable from the MC3000 to the junction box. The manual references to use the L3239 for the LTR radios and the L3208 for Astro. The MC3000 does not have a means to power the radio on/off, so the radio has to remain powered up for the the MC3000 to display the channel info and function.
So I have everything in place but when the radio is powered up, I hear a faint radio power up tone through the desk set speaker and I have a low hum following that but no LCD display. Is this potentially due to the ribbon cable getting moved in the remote head adapter? The dash mount head works fine with the same ribbon. So far I have only changed the radio type setting to LTR as per the instructions for the CDM1550.
Which junction box are you using?
L3208 or L3239?
L3208 or L3239?
I'm using the L3239.
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I have this setup on my VHF CDM1550. Assuming you configured radio type in the MC3000 config, how is your radio connected to the L3229?
Via RG45 Cat5
I have never connected a CDM1550 to an L3229, but I would think that you'd need to use the rear port on the radio and connect that to the 25-pin connector on the back of the L3229.
Here is a post from Batlabs that details the connections between a CDM1550 and a TRA to connect to an MC2500. It would be similar.
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Correct, mine goes to the 25 pin LTR jack on the L3229 via an RJ45 to 25pin adapter. Alex, do you have this adapter? I have a switchbox so I can switch between my local CDM head, and the remote MC3000 head which is 5 floors below via a cat6 cable.
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