Ranger RCI-2950, Руководство по обслуживанию

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MOD FOR FASTER SCAN SPEED ...
First take the radio's top and bottom covers off then remove all the dials off the front face plate then take out the screws
that hold the front face plate. Now you're looking at the lcd and button printed circuit board, remove the lcd printed
circuit board .Now you should see the main proseser board. Lay the radio so that the solder side of the big main board is
solder side downso that you can see the components. Now look at the board that has the proseser on it. If you look at
the back side of the board (proseser board) where the battery goes you should see a blue rectangular shaped resonater
marked 2.00g or 2.000 or 2000 kc that also would have a x1 or x2 etc number on the board near it that is also listed in
the service manual as a resonator/crystal.
If you change the value of this part (remove it and replace it with a crystal ) with a value of 8mhz will make the proseser
run faster in turn giving you faster up\down on your mic, faster scan speed, faster memory scan, a shorter rodger beep
sounds like or similar to 2510. My self when I experimented with my own radio I ran into trouble when I used a crystall
with a value of 14mhz
- 14mhz (works but locks up the radio from time to time)
- 12mhz (was preaty much the same but didn't lock it up as much)
- 10mhz (worked fine but I wanted to run with 8mhz just to make sure)(the radio worked good in all mods all
the time)
- 8mhz (would be what I would recomend not as fast as the others but is a lot more stable for daily usage and is
a lot faster than stock
CAUTION:
BE SURE WHEN DOING THIS MOD YOU ARE CAREFUL NOT TO DAMAGE THE CIRCUIT BOARD AS MOST OF IT IS
SURFACE MOUNT THE TRACES DAMAGE VERY EASILY
THE RESONATER IS STANDERD SIZE OF A CRYSTALL REMOVE THE RESONATER AND REPLACE IT WITH A CRYSTALL
WITH WIRE LEADS NOT THE STANDARED PLUG IN TYPE AS THEY WONT FIT
My method of desoldering the resonater was with a solder sucker with a heated tip.
Where to get crystalls? old pc/xt/at motherboards from computers otherwise you will pay about $10cdn for them.
To assemble radio just do the reverse of the dissasembly
I found a two lead 9.6Mhz crystal that does work. The problem I found with this mod is that when I turn the 2950 off,
then on, it resets the memory which is very anoying. What I did to resolve this was to wire both the 4Mhz and the
9.6Mhz at the same time. I put a SPST switch in the circut for the 4Mhz (original component). When I switch the 4Mhz
out of the circut, the Scan is faster. When I switch the 4Mhz back into the circut, it slows the scan back to original, and
makes the rig shut off correctly and turn back on with all the memory intact.