20 Most Recent Ranger Communications RCI-6900F-25 CB Radio - Page 2 Questions & Answers


Service manual is on the CBTricks.Com website. Look in the index for TR-127GK. This the same radio under the covers. This should suffice as an owners manual also.


....Don at NTCB, Inc.

Ranger... | Answered on Jun 27, 2011


Hello, Just offhand I'd say you have a bad solder joint on the main circuit board. Without more info, I can not tell you where to look,,,,, Mechanic

Ranger... | Answered on May 10, 2011



  • Open your radio and look for a board with a plug going nowhere not even plugged in. Plug it in to the back of the frequency display. Some shops will not ship your e-chip because of how easy it is to convert they want to get paid for it.
Regards, Tony

Ranger... | Answered on May 03, 2011


hello jenn firstly this could be a number of faults its best to check ,when you press the ptt is it registering on the signal/power metre iff not then the problem lies with the final transistor and will need to be replaced ,iff it is registering the problem is with the mic ,check the wirering for shorts remove connector on the mic entering the radio these wires are very delecate and easily broken turn mic gain up fully to test goodluck

Ranger... | Answered on Mar 30, 2011


Do you have receive? If so you might have blew the voice chip. If you don't have receive or transmit you most likely blew those final transistors.

Ranger... | Answered on Mar 21, 2011


The wiper motor transition is not so hard to replace. First remove the wiper blades. Lift the hood to your truck. Towards the windshield their is a plate that covers the entire assembly. Remover the screws and or the push pins and remove the cover. Looking down in there you will see the arms hooked to the transition via a ball stud and socket. Take a pair of long nose needle nose pliers (don't use a screwdriver as it may bend the arm.) and pop the arm off at that point. Don't remove the nut on the wiper motor stud. Your motor is right there. Remove the four mounting bolts. Remove the connector. And wiggle it out. Let me know if this helps you.

Ranger... | Answered on Mar 07, 2011


check your swr's, should be free for any to help you check them either a ham operator/or cb shop.

Ranger... | Answered on Mar 03, 2011


Change the thermostat and make sure there is sufficient coolant in the engine.

Ranger... | Answered on Nov 07, 2010


The guy who was really not a tech probably didn't hook the mic wires back to the mic jack correctly. that will cause the radio not to TX or RX.

Next time make sure the tech knows what he is doing, and check on line for cb radio shop blacklists to make sure that one isn't on the list.

This guy owes you either a new radio, or pay to have that radio repaired.

If both echo boards didn't work, he doesn't know what he is doing, because he put them in wrong.

Ranger... | Answered on Oct 21, 2010


You should always connect it with the radio off. radio may need a tech now.

Ranger... | Answered on Oct 13, 2010


try lowering or raisin the motor

Ranger... | Answered on Jul 26, 2010


Wish I had an easy fix for this and a cheap one but I don't the whole LCD will have to be replaced and its not easy or cheap.

Ranger... | Answered on May 08, 2010


Here is a link that goes to RCI for the complete manual for this model----let me know if you have questions.

If this helped you rate this solution as I do this here for free.

SD TECH

http://www.rangerusa.com/pdf/man6900f.pdf

Ranger... | Answered on Jan 03, 2010


FM - Freq. Modulation

AM - Audio Modulation

USB - Upper Side Band

LSB- Lower Side Band

CW- Morris Code

Ranger... | Answered on Dec 04, 2009


It sounds like something has gone bad in the receive section of the radio.

It could be the RF gain knob is no good.(make sure its turned all the way up.

It could be a resistor on the board loosing value in the receive section. If your radio only has 1/6th watt resistors, its very likely.

At any rate, if its not something simple like a bad RF gain knob, or that you just don't have it turned up, then its going to need a tech.

Unless you have a schematic and service manual and have time to trace it down.

Some things you can try..

Double check all the usual stuff, no matter how simple. Coax, antenna, grounds etc.

then, you can open the cover of the radio, look at the wires connected to the RF gain knob. Should be 2 wires. If you have a soldering iron, you can unsolder them and hot wire them together. this will make your RF gain full.

If its not working after that, it needs a tech to find the bad part.

If you turn off the radio, and disconnect the power wire for a long period of time, and then hook it up and turn it on and the receive is there for several minutes and fades away, its most likely a bad resistor. When it gets warm from running, it looses value.

It could be a resistor loosing value, a cap unloading when it shouldn't. It needs some one who knows how to trace this stuff down on the board.

My best guess without having the radio here with my meter is that a resistor has gone bad. its been known to happen especially if the radio has really small, 1/6th watt resistors. Depending on when it was made, it may have them.

the other thing that could have happened is that if a big radio keyed up next to you, with a lot of wattage, it could have blown the receive.

Ranger... | Answered on Nov 20, 2009


Here's the link to download the manual if you don't have it:
Ranger manual
I suspect however, that the absence of the green LED, the red probably is a warning about excessive VSWR which can damage the output section of the radio; you need a better antenna match.

Ranger... | Answered on Oct 24, 2009


Hopefully it's as easy as this carefully take the cover with the speaker in it off and look to make sure the speaker wire with the plug is plugged into the two prongs sticking up in the back right side corner it is a very tight fit though.Good luck Dan

Ranger... | Answered on Sep 07, 2009


Do you have it set on PA (public address)

Ranger... | Answered on Mar 24, 2009

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