This is a follow up to my recent post about the redesigned Beogram Commander remote control board, which now works in both (DC-motor) Beogr...
Tuesday, September 8, 2015
Beogram 4000: Replacing the Electrolytic Capacitors on the PCBs
While I worked on the breakout board needed to replace the RPM relay with a modern encapsulated signal relay, I also recapped the PCBs. I think it is worthwhile to replace these vintage electrolytic capacitors since the tantalum types can actually catch fire when they go, while the orange aluminum caps are often out of spec at this age. I usually use quality 105C grade capacitors from major Japanese manufacturers, good for another 40 years...;-)
Here are a few impressions:
This is the main board in original condition:
And here after replacing the capacitors (the RPM relay is still in there):
The power supply PCB also has two electrolytic capacitors. This shows the original board:
And here after the replacement:
All good now in the capacitor department! Here is a picture of the lovely old color coded tantalum capacitors. I wish they would make them still that colorful!
Ain't they pretty?? This is Beolove...;-). On to the reservoir caps.