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MOTOROLA CDM 1550
Posted: Mon Oct 16, 2006 5:51 am
by JD
I have a CDM 1550 that will lock up after being on for less than 2 or 3 minutes. No controls work on the radio, you have to unplug it to turn it off. The squelch will sometimes open also..
Has any one experienced this problem ?
Is it a firmware and or software problem ?
Posted: Mon Oct 16, 2006 8:00 am
by HLA
where is it mounted, is it overheating?
CDM
Posted: Mon Oct 16, 2006 8:25 am
by JD
On my work bench, and yes the heat sink gets very warm after about 5 minutes on.
Posted: Mon Oct 16, 2006 8:49 am
by wavetar
When it works, does it put out proper RF power? It sounds like the RF amplifier is running all the time, if the radio is getting very warm after a few minutes. Are you able to measure current drain of the unit during standby/tx?
Todd
CDM
Posted: Mon Oct 16, 2006 11:12 am
by JD
It will not transmit at all, light comes on ,no output. Current is at specs in receive.
Posted: Mon Oct 16, 2006 12:46 pm
by HLA
what does the voltage drop to and the amp draw when you transmit? do you have an antennae hooked up to it? is it possible the antennae is grounded out? if not it needs a trip to the repair shop.
Posted: Mon Oct 16, 2006 1:35 pm
by RFguy
What is the current draw on standby? Sounds funny that the unit heats up agter 5 mins.
Posted: Mon Oct 16, 2006 1:49 pm
by KuhnElectronics
FYI
had a cdm750 do the same exact thing...
to a trip to the depot...came back with NO TROUBLE FOUND....but mysteriously the problem went away...
thank you El'Paso!
Posted: Mon Oct 16, 2006 2:56 pm
by escomm
KuhnElectronics wrote:thank you El'Paso!
What, no free upgrade to a CDM1250?
Posted: Tue Oct 17, 2006 4:34 pm
by KuhnElectronics
hahah...even better...today we got back a CDM1550+LS that was powering on and off by itself...
returned with a new main board...and a new control head!
Thanks El'Paso for sending my heatsink back!