Beogram CD X: Revisiting To Address Some Loose Ends

I finished up the Beogram CD X in a previous post. It has been playing in my workshop since then. I haven't encountered any issues with actual CD play. However, while playing around with the CD X controls I did discover that the seven segment display window has a broken segment.

Pressing the "Display" text on the CD X touch panel will cycle the display from displaying the current track time, total elapsed time and the track number:number of repeats.

While in those other display modes I could see a missing segment.

The Beogram CD X seven segment display is a module specifically made for several CD players of the CD X generation. I contacted Martin Olsen to see if he had any spares. Luckily for me he had a New Old Stock (NOS) module he could source me.

Having recently received it I opened the CD X back up for replacement of the display.

Re-installation of the CD X circuit board with this display is not as easy as it appears. While there are just three screws to mount the circuit board to the CD X frame...it must be aligned just right. The glass touch panel has a number of small rubber contact tabs that must contact metal posts on the board. If they don't make correct contact the touch panel won't operate correctly. It took me a couple of tries to get the CD X display board re-installed/re-aligned where everything worked again.

Once I got past that re-assembly hurdle the CD X was back to full functionality again.

Beomaster 8000: Display Board (part 3)

The plastic mounting tabs of the light guide and lens cover for the display modules were originally long enough so the ends could be melted. The melted ends of the mounting tabs flattened out to hold the light guide and lens cover to the display PCB. Obviously those flattened ends had to be cut in order to remove and replace the LEDs.

The reassembly of these LED display modules could just involve gluing the light guide and lens cover back in place. What we like to do is go a little bit further. In testing the displays we notice that LED illumination exits the back side of the display boards and could end up being visible from other areas of the display. To prevent that we wrap the display in black tape and use some black hot glue to help seal the module together.

Here is the balance display as an example.

That seals the display module pretty well I think. The same thing was repeated for the other three display modules.

Re-attaching the displays to their plastic holders and inserting the connection leads through the display board is a little difficult. It can take a surprising amount of manipulation (and time) to get the modules reinstalled on the board. 

Finally this one is done.