Beomaster 8000: Recapping the Tuner Boards

The final boards to be recapped in the Beomaster 8000 that I am currently restoring were the FM tuner boards. Here are some impressions of this effort. This shows the boards with the original capacitors:

And here after replacing all electrolytic capacitors with 105C grade Japanese units:

With these boards it is especially important to clean the contacts between the boards and coat them with DeoxIT. I had several cases in the past where one channel did not work on the tuner, which could directly be traced to a contact issue between these two boards. After I put everything back together I tested the Beomaster and everything works fine now!

This concludes the recapping of this Beomaster. On to the displays and the uProcessor boards. On into the heart of the dragon...;-)

Beomaster 8000: New Electrolytic Capacitors for the Control Panel and the Preamplifier

I made some progress with the recap of the Beomaster 8000 that I am working on right now. Today I did the control panel and the preamplifier boards. The control panel pcb is bolted to the control panel fixture, and one needs to unsolder the leads to the signal strength meter. After that is done the PCB can be extracted:

Here is a shot of the board after replacing all electrolytic capacitors with 105C grade Japanese units:

As usual, I also reflowed all solder points on the wire-to-board connectors and coated the pins with DeoxIT D100 for longterm stability.

After I put the control panel back together I moved on to the preamplifier board. It seems one 10uF capacitor had already been exchanged at some point. These red electrolytic cans are often problematic at this age.

I replaced all of them with new ones and also did all the connectors:

Here a detail shot:

On to the tuner boards, which will conclude the recap of this Beomaster 8000!

Beomaster 8000: Rebuilding the Power Supply Board

After replacing the original main reservoir capacitors of the Beomaster 8000 that I am restoring right now it was time to do the remaining power supply. The golden reservoir capacitors often fail at this age. Another often found dead capacitor is the 5V rail cap, since it is directly mounted on the 5V regulator (on the heat sink on the right side of the Beomaster enclosure), and therefore sees elevated temperatures. Here is a photo of the original power supply board:

and after replacing all the electrolytic capacitors with quality 105C grade Japanese units:

Before putting the assembly back into the Beomaster I also cleaned and reflowed all headers, and coated the pins with DeoxIT D100 for lasting oxidation protection. On to rebuilding the remaining boards...