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New Blog articles Sep Esmond made new posts. But the next question is why? I’m new here but I have been a Quad solid state user for many years.

BD242 Datasheet

Joost’s recommendations to use a Datasheft when testing ‘s is good advice as one can bring the voltage up slowly. Btw, I don’t think I have blown components. New repainted Quad chassis-parts are available Aug See http: The same thing happened – the same fuse blew again.

All the High-end boards for Quad datawheet are available again as well as the High-end revisio. Thank you Mr Pye. Dada’s service information on this site will give you typical voltages to check. There are no dry joints – I’m an experienced solderer and can replace or repair things I can SEE are faulty but know zero about electronic troubleshooting.

BD (POINN) PDF技术资料下载 BD 供应信息 IC Datasheet 数据表 (2/6 页)

I’ll have a look and do some measuring. I have a variac and your recommendation to to look at R8 is very useful.


Could you please be so kind as to instruct an old dufus where to look or what to replace? I see that EJP has already replied, but there’s a useful list of transistor equivalents if you click the FAQ’s at the top of the page.

During the past several years, my worked perfectly without any issues at all until datasyeet a week ago when I discovered its left channel had no sound. What could have gone wrong?

My friend researched some replacement data sheets for me and recommended the following replacements: After looking carefully, I can see no other overheated part or burnt wire anywhere.

The amplifier is well-ventilated with nothing on top. Thank you and best regards to all assisting me here. I then replaced the bd24 fuse which kept blowing, connected the to its pre and switched on.

BD242 Datasheet, Equivalent, Cross Reference Search

Whereas amplifiers like the are AC coupled the being DC coupled can be much more difficult to repair. I had a similar problem on a earlier in the year it took a fair amount of time to fix.

Hello Gents I’m new here but I have been a Quad solid state user for many years. Apologies for asking for some assistance in my very first post. Check with a multimeter across collector the case and the emitter pin. Datssheet also gave the source the alternative 2SA but she says these items are ‘very old’. Is there perhaps another alternative I can use as datasgeet for or 2SA?


BDA, BDA, – 4 pages datasheet sitemap ::

Some 2N’s and BDC’s arrived today and I worked slowly and carefully, removing the old and replacing them with b242 new. The only unusual thing is the is more or less permanently switched on with the pre-amp’s volume set so low one can barely hear music is playing.

Which of his recommendations are first choice, if any? I did not have a replacement 4A fuse in stock and replaced the blown item with a similar sand-filled 3A fuse which also blew immediately. Even replacing all these caused TR9 and 10 to blow again. I have been unwell for many days with all kinds of flu nasties.

Apologies for not keeping you up to date about my MK silent left channel. I have to buy some 4A fuses today and will post here re the diagnosis.