beomaster 3000-2 repair and restoration

[D T]

Hello everybody !

I got my hands recently on a Beomaster 3000-2  that still look very good cosmetically but in no so good shape internaly. It smells “old drawer” not the expected electronics materials like  the “Textolite” found on device of that age. Capacitors are leaking and sure thing they all must be replaced. My friend who gave it to me obtained in a garage sale, brought it to a “specialist ” to service it  but the guy have not done big deal if he did something. My friend tested it after and was working for a short time before stoping and starting to fume and smell burning. This was few monts ago and sure thing I won’t power it up before cleaning it and replace all capacitors and trimpots if necessary. At first sight I don’t see any burned parts, traces or components, nor the burning smell still there .

I have no experience with amplifiers repairs but I am not stranger of electronics .  I am good with soldering/ desoldering , general troubleshooting , use of oscilloscope and all tools on the electronics tech arsenal so I am not afraid to begin the task of repairing and restore this beautiful piece of tech . I would like however to benefit from the experience of other people that have already did the same. So any advice and warnings before I begin dismantle it for deep cleaning and capacitors replacement would be highly appreciated.

Thanks in advance!

DT

[Dillen]

Check the idle currents!
The trimmers will be bad – just as bad as the capacitors you’ve noticed, and they will need replacing and realigning.
Did it smoke – check/replace the emitter resistors as well.
A convenient service kit is available containing caps and trimmers.

Martin

[D T]

Thank you for taking the time to read my post and answer. Indeed the trimpots does not look very good. I will replace everithing that can be replaced. I ordered the capacitors and trim pots kits fom Danish Sound Parts . To date, I dismanteled the radio pcb ,the preamp, the amp , the switch bar and begin cleaning the pcb’s  to remove the stiky dust.  Still no trace of burning. Everithing is very brittle and managed to broke a SMD pad on the switch bar but luckily will be a easy fix. Need to be more careful.

Next I will desolder the switches and clean the contacts. Few switches have  very oxidized contacts. Then I will dismantle the transformer and see how it looks. I will share my experience once I have something more done.

DT

[Author]

Posts