This was done by soldering a 1 mega ohm resistor to the middle contact of the contrast potentiometer and the display board
ground.
In order to make this modification you need too do the following proceeder.
Remove the top and bottom cover from your RCI 2950. Carefully remove all the knobs from the front panel, loosen the four
counter sunk phillips screws holding the face plate.
Remove face plate.
Loosen the two lowest two phillips screws. (these screws holding the push button circuit board)
Remove the push button
board extremely carefully by pulling this board in a parallel way toward you.
Make sure you pull this board parallel, there are
extremely long contacts.
The contrast adjustment trimpot is in the centre of the display board and will be visual if the push button board has being
removed.
The trim pot is a SMD (surface mounted) component and resistor should be soldered carefully.
This modification solved my problem for the time being.
www.radioaficion.com
Содержание RCI-2950
Страница 26: ...Ranger RCI 2950 Main PCB Schematic Diagram ...
Страница 27: ...Ranger RCI 2950 CPU PCB Schematic Diagram ...
Страница 28: ...Ranger RCI 2950 Chassis Exploded View Drawing ...
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Страница 34: ...Ranger RCI 2950 LCD P C BOARD EPT2950217 Trace Layout RESISTORS ...
Страница 37: ...LCD P C BOARD EPT2950217 Trace Layout ...
Страница 38: ......
Страница 39: ...Ranger RCI 2950 CPU PCB EPT295043Z Trace Layout ...
Страница 46: ... SHORT PIN 2P EX07N48151 www radioaficion com ...
Страница 47: ...CPU PCB EPT295043Z Trace Layout ...
Страница 48: ...Ranger RCI 2950 MIC UP DW PCB EPT295080Z ...
Страница 49: ...Ranger RCI 2950 MIC JACK P C BOARD EPT295070Z CERAMIC CAPACITORS Ref Description MFR Part No ...
Страница 52: ...Ref Description MFR Part No C405 01uF 50WV Z SL CERAMIC CCO501037L C406 01uF 50WV Z SL CERAMIC CC0501037L ...
Страница 53: ...Ranger RCI 2950 RCI 2950 VSWR P C BOARD EPT360040Z Schematic Diagram ...
Страница 57: ...J601 PCB CONN SOCKET 3P EX07N41216 J602 PCB CONN SOCKET 3P EX07N41216 ...
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Страница 62: ...PCB CONN SOCK 6P L 21 8mm EX07N48441 ...
Страница 63: ...Ranger RCI 2950 EPT295031Z Push Switch PCBEPT295031Z Trace Layout www radioaficion com ...
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Страница 81: ...C348 3PF 50WV C CH CERAMIC CC050030 IA C349 01uF 50WV Z SL CERAMIC CC0501037L www radioaficion com ...
Страница 102: ...R336 10K 1 4W U TYPE RCM141034A www radioaficion com ...
Страница 130: ...www radioaficion com ...
Страница 137: ...www radioaficion com ...
Страница 139: ...INSTALL MY RCI ON THE CAR S LIGHTER ADAPTATION OF STEREO HEADPHONES ...
Страница 140: ...www radioaficion com ...
Страница 148: ...TONE MODIFICATION You need to listen with confort Add a tone capability to your RCI Very simple www radioaficion com ...
Страница 150: ...Ranger RCI 2950 Alignment Locations TX ...
Страница 152: ...Ranger RCI 2950 Alignment Locations RX ...
Страница 154: ...Ranger RCI 2950 Alignment Locations PLL ...