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...
Friday, May 15, 2015
Beomaster 4400: Recapping the FM Decoder PCB
The Beomaster 4400 that I am currently restoring works seems to be nicely now. I listened to it occasionally the last two days, and nothing else came up. So we decided to go ahead and do a recap. Definitely worth doing for this unit due to its excellent cosmetic condition. I already did the IF stage during the trouble shooting process. Today I followed up with the decoder board, that also can be removed. Here are a few pictures:
This shows the board 'in situ':
Taken out. It can be a bit tricky to get this board out since the plastic clamps can be fairly difficult to push through the holes. I usually put a touch of Ballistol around the routed openings in the PCB to ease the strain on the often brittle material:
And after exchanging all electrolytic caps with quality 105C Japanese models:
After this was done, I cleaned the headers on the main PCB and coated them with DeoxIT D100L for long term stability. Then I plugged the board back in and turned the Beomaster on. All good. The reservoir caps are next!