BeoGram CD X: Restoring the door motor

In the previous post about this BeoGram CD X unit I got it working again by reworking the board vias. While the CD X was playing CDs again its motorized door was struggling with opening and closing.

I ordered a new belt for the door motor and received it from Martin Olsen this week.

This post shows the opening back up of the CD X and changing out the belt motor plus checking capacitor 2801 (220uF, 10V) of the door's motor drive circuit. The capacitor is sometimes faulty.
I will also show the restored vias on the Servo board (PCB 04) as I promised in the first CD X post.
Here is the CD X with the bottom cover removed. You can see the door motor assembly on the left.

I removed the top cover from the main CD assembly to make easier work of the belt replacement.

While the CD assembly is out I will take this time to show photos of the Servo board (PCB 04) I restored the vias on earlier.

Continuing with the CD X motor belt and capacitor 2801 replacement, this next picture shows the CD X top cover with the door motor assembly.

The door motor belt cannot be replaced without some more disassembly so the next few pictures illustrate taking the motor assembly apart to get at the belt.

To remove the gear blocking the extraction of the belt there is one of those pesky C-clips. Pesky because they are very easy to lose.

I had to loosen the two screws on one door switch assemblies to give enough clearance to remove the large, white, plastic gear. Finally the belt as accessible.

I installed the new belt and reassembled the motor assembly.

Now it is time for the 2801 capacitor.  I de-soldered and removed it. Sure enough the 220uF capacitor only measures 65uF.

Replacing it I can continue the reassembly of the CD X.

A test of the restored door motor assembly now shows the door opening and closing with ease.
This CD X is ready to go back into service.

Beomaster 8000: Visit of an Old Acquaintance - Restoration of the Control Panel Lid and a Redesigned Lid Linkage Replacement Part

Oh well...Beoloving can be a bit experimental. When new parts are developed occasional failures need to be anticipated. So it was the case with the part that I designed last year to repair a control panel lid spring retainer when I restored a Beomaster 8000. This part failed during return shipment, maybe due to the package getting a bit hot and my plastic part a bit soft, which let the spring 'escape'. This is how it looked when I received this unit again about a week ago:

To finally cure this issue for good, we decided to purchase a Beomaster unit from ebay. A unit with a badly damaged heat sink became available:

Seems a fork lift drove through it or a similar disaster happened. Miraculously the control panel lid was still intact without any damages. While convenient for the issue at hand, it always hurts to see a Beomaster 8000 go down like this due to carelessness or poor packing for shipment.

Some more parts from this unit turned out to be useful to cure some more cosmetic issues with this unit like the scratched 'Monitor' button

and the broken off control panel lid lock that I replaced with a 3D printed part last year. I took the opportunity to replace both with original parts from the ebay unit:

Beautiful again!

When I put the unit back together after these repairs, it occurred to me that the lid made an ungainly clonking noise when opening. It turned out that the control panel lid linkage that connects it to the motion damper was shifting abruptly from one side to the other in the fixture that connects it to the lid during the opening sequence. I took this as an invitation to improve my 3D printed replacement linkage by making the upper end a bit thicker, so that it fits precisely into the allotted gap, preventing the shifting issue:

I installed it (shown a prototype printed in red for more detail):

After verifying that this cured the issue I replaced it with a black 'production' part since the upper end can be seen when the control panel lid is open:

This linkage, like all my parts, is available to other enthusiasts. Just send me an email or use the contact form on the sidebar.  There is also a video on my YouTube Beomaster 8000 playlist that demonstrates the installation of the linkage.

All good now in the control panel section of this Beomaster! Time for a little test-drive before shipping it back!