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Beogram Commander Remote Control: Maybe This is the Final Version!..;-)

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, June 15, 2012

Beomaster 8000 Rebuilding the Power Amps

Today I rebuilt the right output stage. I put in new electrolytic capacitors and replaced the no-signal current trimmer. It was a good idea since a look at the old one revealed that it was intermittent when turning it. Adjusting the voltage between TP200/201 to 18 mV according to spec yielded a nice cool heat sink, even after a 1hr run. Here are before and after pics:
At the end I adjusted the offset of the differential amplifier input with R200 to 0mV at the speaker jack. On to the left channel!

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