MCS2000 Key up Problems!!!!

RADIO43 · Post by **RADIO43** » Mon Jul 02, 2007 6:36 am

Guys,

I have a dual head UHF (Range 2) MCS2000 set up in one of our fire chiefs vehicle and for some reason the radio is keying up for no reason. For what I am told, when the vehicle is started it does it about 3 to 4 times and then stops but then will continue to key up every once in a while. Fortunately, it just keys up with the pre-mdc and then unkeys. Anyone have this problem and a way to correct it. Thank you in advance.

radio43

Bruce1807 · Post by **Bruce1807** » Mon Jul 02, 2007 7:16 am

start by unpluging the microphones and see if it happens.
Also are the jumpers correct in the25 pin Plug underneath?

RADIO43 · Post by **RADIO43** » Mon Jul 02, 2007 7:31 am

Bruce,

radio justed started doing this, so the 25 pin plug has not been touched. I am pretty sure it still does it with the mic attached or unattached. Weird thing is that when it keys up, it just keys the mdc packet and then unkeys. It will do it up to 4 to 5 times in a row sometimes.

radio43

motorola_otaku · Post by **motorola_otaku** » Mon Jul 02, 2007 7:54 am

Spectras do that when the control head caps start to leak, so.. nothing liquid has been spilled into either of the remote heads, has there?

HLA · Post by **HLA** » Mon Jul 02, 2007 8:31 am

it just started doing this out of nowhere? it sounds like the emergency signal is being set off. read the radio and see if it's programmed for an emergency button, if so, then find the button and see what's shorting it out or setting it off.

Bruce1807 · Post by **Bruce1807** » Mon Jul 02, 2007 8:39 am

Thats sort of where I was heading HLA but starting with the jumper for the external alrm.
RADIO43 make sure the plug in the bottom is in tight.

HLA · Post by **HLA** » Mon Jul 02, 2007 1:42 pm

and make shure nothing inside that connector is arcing out and causing the emergency signal to go off. do you have anyone around there with a cdm1550? if so program it up to recieve the emergency signal, if it's coming thru then that's the problem.

thebigphish · Post by **thebigphish** » Tue Jul 03, 2007 12:43 am

our Range 2 MCS2ks are NOTORIOUSLY picky about battery voltage. Get a good multimeter and watch the battery voltages when you start the vehicle, betchya the voltage is dropping off and the radio is getting weird.

RADIO43 · Post by **RADIO43** » Tue Jul 03, 2007 10:03 am

Guys,

Thanks for all the info. I will be testing all of the possible issues over the weekend.

Radio43

MCS2000 Key up Problems!!!!

MCS2000 Key up Problems!!!!

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Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!

Re: MCS2000 Key up Problems!!!!