There's a capacitor kit available and I also have the U8 prescaler IC (original mfg. new part) plus diverse used parts, boards etc..

There's a large transistor near the U8 that gets hot when operating. I usually try to bend it slightly away from U8, it won't go far, though. Not that I have been able to confirm that the heat is what actually kills the chip, probably more likely to be a bad batch of IC's.

Martin

Hi all,

I'm come back and sorry for my delay. I have attached 2 pictures of the beomaster 6000. Since the last time I have noticed that I have a DC signal at the imput of the IC prescaler U264B and perhaps it could be the reason of the 74.8FM readout on the LED display? What do you think? Then I have a short-circuit in the amplifier module (for the -50v supply)

Do you have any idea for the problem of burned capacitors and for the short circuit although I will check the MOSFET?

Regards,

Mathieu 

And the second picture,

Mathieu

The Beomaster won't power up with the amplifier looking like this, a capacitor kit alone won't cure it, I'm afraid.

I'm sure that the 74.8 frequency readout is caused by the prescaler.

Martin

Wow. What a meltdown.

You should check every component on that board and the output transistors to track down this fault. As Martin says a cap kit won't repair it but you will probably change a lot of components on that board, so a kit is "good to have" anyway. I can understand why the cap c215 and the resistor r221 is damaged for example if there is a short in tr210, tr211 and/or the output devices. But I can't figure out what can cause c201 and c202 to melt. It would be interesting to see what reason you will find out when you measure the components of that board. Please report any progress here.

The damage to the chassis can be repaired with "chemical metal" or anything equal.

Good luck and keep us updated!!!

/Fredrik