CDM1250's w/RICK Issues

[Stripes]

Hello Internet.

I'm trying to use 2 Motorola CDM1250 radios for a repeater configuration with a motorola RICK, and I'm having a difficult time trying to get the cables from the CDMs to power and control the Rick. I know the rick and cables work because they came out of my working GR300, but they won't now. I'm confident it's some settings in the CPS but I've played around with it extensively and I've became exasperated. There's some magic setting I'm missing. Does anyone have an idea?

**Pin 4 and Pin 12 on the RX radio is set because I want to use the RICKs knockdown feature where if I transmit a DTMF tone, it'll kill the TX repeater with ignition sense. 

[gortex2]

Well lets start from the basics. I assume you have the power switch in the on position on the RICK ? The picture shows it in the OFF position. The CDM Radio has 12+ on the 16 pin connector Pin 13 (Switched A+)

Also the RICK has dip switches in the unit for COR/PL Detect pins as well as remote enable. Did you look at the RICK manual ? 

It appears you are trying to use PIN 8 for COR so the RICK must be programmed to use that pin. On the TX raido that should be blank or null as there is no need for COR on the TX radio. On the RX radio Pin  3 should be null also as there is no need for TX on the RX radio. 

The CDM and Rick are pretty basic. RX Radio just needs PL Detect (Pin 8), Discriminator audio (Pin 11) and Ground (Pin 7). If your trying to use remote control then of course those wires are needed also.

TX Radio is similar however the only pins you really need are Mic High (Pin 2), PTT (Pin 3) and Ground (Pin7). To power the RICK you need Pin 13 Switched A+ from one of the radios only. 

You can view the RICK manual here - https://www.repeater-builder.com/motorola/manuals/rick-manual.pdf

The work well when configured properly. I used to maintain 100's of them back in lowband days as they were used for vehicle repeaters from Lowband to UHF. Still have many in service and a few NIB in my shop. They are very basic but work. 

[Stripes]

Hello and thank you for helping. 

Yes I've been using the power switch to try and get power onto it. The patch cables have all 16 pins populated for both radio and rick ends.

I've adjusted the programming to what you have noted. The TX radio the COR is now null and on RX radio pin 3 is now also null. Thanks for that insight. 

I've also opened the rick and my dip switches are set to what the manual worksheet has for my needs. Even with all this, I'm still not getting power sent to the Rick. So I'm stumped again. Could it be possible that there are jumpers in the CDM's that I'm missing? I've opened one up and didn't see any. 

[gortex2]

Pin 13 from the CDM is 12V+ when the radios are on. Does the Rick see 12V on pin 13 ? All the RICK needs is 12V and ground and it will turn on by switch. I'd start making sure you have power to the RICK.

[Stripes]

Welp I gave that a try with pin 7 being my ground and pin 13 being +12v. And both radios were giving 13.2v. I'm suspecting that it may be my patch cables. If it is, I'll feel really stupid. I'm going to just order new connectors and rewire the patch myself in hopes that my problem. Ive douted it being them since it worked with my GM300's and these are 16pin fully populated.  sorry to be a inconvenience.

[Stripes]

So I got some jumpers and got 13v out of pin 13 and pin 7 as ground (radio is upside down). I mirrored it to the RICK as the connectors would be and I'm still not having the rick power up. 

[SteveShannon]

Put the RICK back in your GR300 and verify that it works. 

[Stripes]

Yep. Works as intended. This is why I'm so confused. I'm thinking about scrapping the rick and just patching radio to radio. 

[gortex2]

So.opem up the rock and follow the schematic. Did you try other ports on the RICK ? According to the manual pin 13 goes to F1 on the board before the switch. Do you have 12v on both sides of the fuse ? 

 

Pin 13 on the acc goes to pin 10 on tx radio along with the setup switch 

[gortex2]

Is it possible in the GR you are getting power from a different port ? 

[Stripes]

That I don't know. I don't have the ability to program the GM300's to see how it's been setup. I've continued to try and play around, checking the manual and cross referencing things and I'm just, lost. 

[gortex2]

Id suggest a DVM to start following the power runs on the RICK. I am guessing the RICK from the old radios gets power from another pin. You should be able to measure the pins on the old cables and see which one has 12V