1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

Old RCI 2950 on the bench tonight !! Need help as always lol

Discussion in 'CB Radio Modifications' started by WINKDOGG, Nov 30, 2019.

?

haved you ever owned a 2950?? Rate it 1-10

  1. Love Mine !!

    8 vote(s)
    100.0%
  2. Sold / Traded it for Connex lol

    1 vote(s)
    12.5%
Multiple votes are allowed.
  1. WINKDOGG

    WINKDOGG Your Long Distance Radio Friend Four-Two-Zero NJ

    Joined:
    Feb 21, 2011
    Messages:
    92
    Likes Received:
    90
    Ok so I have a really old , I believe 1st gen Ranger 2950 . A buddy did a display LED "mod" for lack of a better word ;( All display and faceplate(button) lighting was dead ) but display still was working .) as you can see in the pics he tapped into a plug on the board to find ABOUT 12 volts and wired in two 12v leds from pepboys haha . Hey at least he got the display lit up right ?!? Apparently one of the LED wires got shorted to chassis ground and when he tightened the case screws it smoked and then he gave it to me ;)

    Question 1. What is the brown plug he tapped into ?

    Clearly the red wire cooked back to the plug he hacked into
    I replaced the wire and removed the LEDs he had inline and still no power .
    I checked the protection diode (I think) Im having a hell of a time with the ranger Schematic tracing this sucker.

    Any Ideas ?? Questions or need more info please chime in the more help the better !

    There is also a missing orange LED for the buttons and none of them EVER worked so I'm just going to wire in a few surface mount blues (or a strip of micro blue LEDs ) sounds easier than replacing the orange LEDS that are ugly anyway lol !!

    Feel free to talk and recommend diodes to check or whatever you think would fix an internal short!! It was a free radio so Im willibng to experiment but its also a 38 watt driver whwen it works so hopefully if we all put our heads together we will have her buzzing in no time !

    I know you ranger guys have some great advice and Im ready to get this old girl talking !

    Only the red wire back to the brown plug(see pic) I see no bad traces or hotspots on the board near "the smoking wire plug" lol



    Any help getting this good ol girl will be greatly appreciated !!!

    026.JPG 027.JPG 028.JPG 035.JPG 037.JPG 038.JPG
     

  2. newoldguy

    newoldguy New Member

    Joined:
    May 31, 2019
    Messages:
    31
    Likes Received:
    16
    so you are just missing the lighting or is the whole radio dead? did you also check regulators??
     
    WINKDOGG likes this.
  3. Chevboy0167

    Chevboy0167 Well-Known Member

    Joined:
    Apr 5, 2017
    Messages:
    286
    Likes Received:
    168
    Yes, does the display still light up? Does the radio still respond to face plate buttons being pressed? Does the radio still transmit? Very important questions here to go any further.
     
    WINKDOGG likes this.
  4. WINKDOGG

    WINKDOGG Your Long Distance Radio Friend Four-Two-Zero NJ

    Joined:
    Feb 21, 2011
    Messages:
    92
    Likes Received:
    90

    Ok sorry just noticed the reply's !! The radio works pretty well now that I cleaned the knobs and replaced the power wire socket (pin almost broken off ) I think its got a bad final it only swings 15-18watts on the MFJ 18-20 on the DOSY and I aligned tx side as well as turned AM and modulation up to 90% and 105% respectively . But I will figure that out when my new final kit comes in !

    I don't know the back story but my focus is the lights right now . All of the yellow button backlights were blown (but not a single resistor in line???) There was two pep boys LEDS 12v wired to the power socket lighting the display but they shorted on the case :( After pulling the face plate apart (long ass pins lol) I fount the pads for the original 6v display leds , attached leads but no power to those pads . I then checked the yellow LED pads and no power to that entire circuit ??

    I can just wire in a fresh set of 12v leds for the display but I would rather do it right and I cant think of a 12v workaround to light the buttons (tiny pace cant fit a strip need to replace all the little yellow guys and get power restored to that circuit (with the help of you gentleman of course lol)

    Apparently my schematic reading skills are lacking bc the RCI schematic it heavily populated and hard for me to interpret . Im much better with older single layer schematics(preferably hand drawn with lots of notes and arrows and circles haha) and will admit that flat out :sick: So I need some help on a more basic level if you know what I mean sorry . Im no dummy and I can chase components on the board by number but that schematic really looks Chinese to me .

    Thanks in advance for any help my friends 73's Brian
     
  5. WINKDOGG

    WINKDOGG Your Long Distance Radio Friend Four-Two-Zero NJ

    Joined:
    Feb 21, 2011
    Messages:
    92
    Likes Received:
    90
    Sorry I didn't explain the basics first guys !!

    Ok sorry just noticed the reply's !! The radio works pretty well now that I cleaned the knobs and replaced the power wire socket (pin almost broken off ) I think its got a bad final it only swings 15-18watts on the MFJ 18-20 on the DOSY and I aligned tx side as well as turned AM power and the modulation up to 90% and 105% respectively . But I will figure that out when my new final kit comes in !

    I don't know the back story but my focus is the lights right now . All of the yellow button backlights were blown (but not a single resistor in line bad ???) There was two pep boys LEDS 12v wired to the power socket lighting the display but they shorted on the case :( After pulling the face plate apart (long ass pins lol) I found the pads for the original 6v display lamps, attached leads but no power to those pads . I then checked the yellow LED pads and no power to that entire circuit ??

    I can just wire in a fresh set of 12v leds for the display but I would rather do it right and I cant think of a 12v workaround to light the buttons (tiny space cant fit a strip need to replace all the little yellow guys and get power restored to that circuit (with the help of you gentleman of course lol)

    Apparently my schematic reading skills are lacking bc the RCI schematic it heavily populated and hard for me to interpret . Im much better with older single layer schematics(preferably hand drawn on napkin with lots of notes and arrows and circles haha) and will admit that flat out :sick: So I need some help on a more basic level if you know what I mean sorry . Im no dummy and I can chase components on the board by number but that schematic really looks Chinese to me .

    Thanks in advance for any help my friends 73's Brian
     
    Shadetree Mechanic likes this.
  6. WINKDOGG

    WINKDOGG Your Long Distance Radio Friend Four-Two-Zero NJ

    Joined:
    Feb 21, 2011
    Messages:
    92
    Likes Received:
    90
    Update … I had great skip conditions and wanted to run the 2950 as a low wattage driver so I did this …. 036.JPG 037.JPG 038.JPG

    Just ran some leds with 47Ohm resistors right off of the 12 volt power jack again :whistle:

    I would still love to restore power to the original solder pads If anyone knows what I should chase down to get power back to the button back lights and display solder pads … no voltage anywhere and I really need that dim button back lol !

    Thanks Guys , Brian 4-2-ZERO
     
    Shadetree Mechanic and Woody-202 like this.

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!