Beomaster 5000 very soft sound?

in The Workbench · Oct 29, 2007 07:22 GMT

OK it's finally fixed! In the end it was something trivial: a 330nf cap on the IC u741 in the power supply section. I think it has something to do with the MUTE function, but not very clear how..anyway it works and that …

Beomaster 5000 very soft sound?

in The Workbench · Oct 1, 2007 01:28 GMT

OK, I'm still waiting for the TDA 1028/9 to arrive, so I've been looking around some more. All voltages into the IC are correct, so 20 volts supply seems OK. I replaced IC1 in the power supply, but this made no change. A…

Beomaster 5000 very soft sound?

in The Workbench · Sept 24, 2007 08:41 GMT

Hello Nick, Martin and Alex thank you for your words of encouragment. I still have a few things to try, like being more systematic with the power supply measurements, so far I've concentrated with the pre-amp as this see…

Beomaster 5000 very soft sound?

in The Workbench · Sept 22, 2007 04:14 GMT

OK, got a logic probe, and barring my unfamiliarity with using such a device, I found pin 9 reading constant 'high'. Certainly no pulse. replaced all 3 100nf decoupling caps, just in case, no change So I replaced TDA 107…

Beomaster 5000 very soft sound?

in The Workbench · Sept 17, 2007 06:41 GMT

Thanks Nick, I'll get a logic probe tomorow and get back. Philippe

Beomaster 5000 very soft sound?

in The Workbench · Sept 16, 2007 07:50 GMT

Thank you for looking in solderon29 and Martin 🙂 Martin, yes I have replaced all the caps that were in the kit, and that included a 220uf (radial) in the power supply. Is this the one you're thinking of? I have done som…

Beomaster 5000 very soft sound?

in The Workbench · Sept 9, 2007 01:32 GMT

OK, I've done a little bit more work on this. ;-) After renovating the caps in both the power amp and pre-amp sections, as well as replacing all output darlingtons, and the trim pots....no change. I tried connecting the …

Beomaster 5000 very soft sound?

in The Workbench · Jun 12, 2007 06:46 GMT

Hi, my beomaster 5000 has decided to become 'uncooperative' The sound output is very (very) low, and this is regardless of source, either radio or CD(50). It sounds like the power amp section is not working...maybe. Turn…