ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi all, I’ve recently come into a Beomaster 1900-2, with a record player and speakers. Found in my mums loft on Sunday whilst looking for a book and in turn this has led me to this place.
Turns out she put it up there because the volume control stopped working properly. I’ve done quite a bit of reading on here, (I’m by no means an electronics or audio guy, but I do a lot of car bits and bobs and love a challenge) and I’ve seen a lot of stuff from ‘Dillen’ on the LDR’s.
I already stripped the unit down to check it was nothing obvious, and it definitely wasn’t. Everything has gone back together and is working as it was.
The thing is, the behaviour is odd, I’ve tried to outline below to help someone that knows these units better than myself to maybe diagnose?
- Press volume up or down, and the lights sort of flicker, both the volume up and down sides of the graphic.
- Use the preset volumes, and ‘High’ and ‘Medium’ only work, low does nothing, but you really can consistently flick between two settings just fine.
- Press both volume up and volume down together, tap at the buttons randomly and frankly furiously, and randomly it’ll jump up or down in volume an utter shed load?
It almost seems like it’s somehow shorting as you’re pressing the buttons? Maybe? Or it this really just a simple case of the resistors not working as they should?
Having taken the unit apart I can see the pressing the buttons themselves just make a contact? Anyone got a laymen’s explanation as to how the system works so I can try to fault find myself?
Thanks in advance!