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As described briefly in the ‘What are you working on now’ thread I have recently purchased a spares or repair BeoCom2 to have a play with. Despite a charged battery, the display would just show random lines on switch on, and then shutdown. I stripped it down making use of a blurry YouTube video here.
Here’s the stripped down phone again. It burst into life after I disconnected and re-connected the ribbon connector for the display (a technique that I have used on Beocom 6000s, albeit with a different different connector). It connected to my PSTN without problem, and I could use the usual functions:
However, as seems common with these phones the little ‘nipple’ scroll button had snapped off, hence I was having to use a small screwdriver to move the pointer – not ideal. I therefore stripped it down further, removing the keyboard.
The photo shows the main PCB and the reverse of the keypad. I realised that the pointer is not part of the keypad, but uses a small plastic disc with extension to press a conductive sheet against the small square array on the main PCB. Here’s the sheet held up to reveal the hole, with the broken pointer to the left:
I stripped the remaining perished black plastic from the pointer, to reveal this:
I then used a small (12mm long) piece of heat shrink tubing that fitted tightly over the white plastic, and added part of the shaft from a small back plastic bolt to give it some rigidity. I heated slightly to shrink the rubber and hold the black plastic thread in place at the top. I didn’t heat shrink onto the white plastic because friction seems to be sufficient.
I re-assembled (almost as tricky as dismantling!) and it all works! Tested by scrolling through menus and adjusting volume on BeoSound 1. The pointer is a fraction too long but I could probably make a shorter one and replace without disassembly.
Needs a good clean now, and I may even invest in a new battery so that I don’t have to keep charging after each stage of repair!
As always, happy to answer questions.
A photo of the back of the display frame would be helpful so that we know what the retaining lugs look like.
I just removed it again to take a couple of photos. I noticed that one of my clips is indeed missing (blue circle), but it still seems to hold together well. The red circles show where the clips in red in the bottom photo hold.
EDIT: There are some very small clips just above the keyboard no 1 and 2 buttons. The cover pivots away from these as you remove it; there is no need to apply any tools in this area.
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