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Problem with Yamaha CA-810

anderson_p_r

anderson_p_r

Patman
Howdy Hipsters. First time poster long time reader. I recently got a Yamaha CA-810 in decent shape for $100 (maybe too much?) that I am now having problems with. The previous owner said he had recently had it serviced, including cleaning of all contacts and knobs and relamping. What happened was this: My technics SL-5100 started to "runaway" as I've come to know it and accelerated to very high RPM. Before I could get over to it and stop it the output on the Yamaha quit. It still had power and lights, but the amp would not click on. As the idiot I am I took off the top and was looking to see if there were any obvious shorts or what not that I thought I might be able to fix and foolishly put my hand down near the power supply. This caused a brief arc and blew the fuses. Now it blows fuses instantly. I've paid a local repair shop $30 to look it over and see if they can fix it. I really enjoyed the sound while it was working and I guess I'd really like to know if it's worth fixing or if I should just move on? Any idea what went wrong (aside from me and my fat fingers)? Any idea how much the repair should/could cost?

Thanks, Pat.
 
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Sorry, I was listening to Quadrophenia. I guess long story short the amplifier went out suddenly following a "runaway turntable speed" event. Then I touched something inside I shouldn't have and now it's dead. Is it worth trying to repair or should I just look for something else?
 
sorry ...being 1.45 a.m here ..full of booze my 50th birthday end of drinks thing .. i cant honestly work it out ..i am sure someone will come along and help you fix it ..yep the booze got me damn it
 
anderson_p_r said:
Ok, repair shop came back and said two output transistors are dead and that he can not find OE replacements. I poked on google real quick and found the following links. Any thoughts?

http://www.audioasylum.com/forums/vintage/messages/4/49812.html

http://shop.vetcosurplus.com/catalog/product_info.php?products_id=3125

http://shop.vetcosurplus.com/catalog/product_info.php?products_id=3122

http://www.oaktreevintage.com/Yamaha_Stereo_Parts_Unit.htm

Thanks, Pat.
Click to expand...

Don't use NTE's --They are like a box- o- chocolates,Ya don't know whats your getting..
 
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Got the Yamaha back yesterday. Sounds great :) Local repair shop said he used transistors "2SB554 sub for 555" and "2SD424 sub for 425" and he replaced a few bad capacitors. Any thoughts on that? It's greek to me. But it sounds great so I'm happy.
 
Good to hear. That's a nice piece. Certainly worth a repair.

BTW. 100 is a pretty good price. I saw one on ebay go for three times that! Was I "surprised"? You bet. I was amazed someone would pay that for a CR-810. But they did! Of course that is much higher than usual.

But 100 is good!

Enjoy!

Just got my cheapo Kenwood KT-7300 hooked up to a Sansui AU-517. Man what a difference a half decent Tuner makes!

Yamaha makes some nice vintage tuners that would match your unit if you listen to the FM?

Enjoy!

cnh2
 
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