Trimmer on circuit Board

[Ronk]

Does anyone know what the blue trimmer is for on the left side edge of circuit board on the Classic 3 sl? Mine has the Mr Bill mods with the Ground balance and Threshold outside the box so it couldn't be one of those.

Ron K.

 

[kt315]

Ron, give pls a photo of the PCB I can see you meant...
Yours

 

[Ronk]

I found out what the trimmer is for in case someone else ask.It is to calibrate the external disc control where targets are accepted and rejected on the dial.Right now on mine with the External disc control Zinc cents are rejected almost at max and the twist on Screwcaps should be close.I don't have one to test.Normal a US nickle is accepted from Min up to or right about Coin Range P on the dial.Just a hair past Coin Range the nickle will be rejected.Every Classic detector might vary slightly on the dial.Those settings are with the Black Sand switch in the NORMAL position.If you DO change the internal Disc Pot {which you really don't need to}make sure you notice it's position before you change in case you want to adjust it back to factory normal.It is a single turn pot that takes a small flat screw driver.It is on the very edge of the left side of the board.I can't see where anyone really needs to change the position of it and you really shouldn't do it if you have the IDX or IDX Pro or ID because your Display will be off.

RonK