Help With Cscope cs2m

[keith777]

Hi guys.
i have a acquired a Cscope cs2m detector which is working, but the sensitivity Potentiometer on the control box is broken. it just keeps turning around & around. when inspecting inside the control box someone has already changed the Potentiometer by the looks of it. plus fitted a on/off switch.
can anyone tell me please what the original control box sensitivity Potentiometer value should be if possible incase who ever changed it has fitted the wrong one.
thanks in advance.
here is a picture of the PCB and Potentiometer.

[greylourie]

Maybe if you could try a lower value than what is marked on the faulty pot. Perhaps someone with one of these will post the original value... Or get some spare pots of various values.

[keith777]

now sorted....

[kt315]

according William Lahr's schematic the pot is 47k. so 50k you have at pcb is OK.

[keith777]

thanks kt315
i got some advice of a guy on another forum and he said to use a 47k
thanks very much for your post and pic. much appreciated.....

would you know if there is any mods for this machine or not. thanks in advance.