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Cary Audio SLA-70B amplifier

I have no schematics for my SLA-70B and Cary Audio no longer offer technical support on this very old [27 year old] amp.  The LED light on the front panel of my SLA-70B Signature Amp does not work [does not light up]. Upon my opening the bottom panel I noticed that the positive side of the LED was “just hanging in the air.  Also a resistor 100K 5W was totally blown up so I cannot take a reading of it at all.

[I don't know why I cannot include an illustration of the issue in question]

The negative of the LED is connected. The positive (orange wire) is just floating loose.  There is a resistor 100K 5W which is connected to GRD and the other side has blown up.

I do hope someone can allow me to upload an illustration. It will definitely help in solving this issue.
Thanks, richfrank

richfrank

Showing 3 responses by decooney

decooney
2,334 posts
 
@russ69 I think I’d be all over Cary. HEY! Provide some service or provide the info I need to fix it myself. I’d get someone on the phone to tell me I’m SOL, then I would tell them, bad mistake, you guys are going to be my hobby, and it’s going to get ugly, your call.

They don’t troubleshoot over the phone any more. Been there done that with them and seemingly got the last lead designer-tech in trouble there helping me with my V12R mods. He quit two weeks later. Felt bad. He went on to new things, now designs and builds pro audio tube microphones. If lucky, will just tell you to send it in and charge for the repair. Double-bubble and double-box if you do.

@richfrank
Probably better off sending it to a good local tech, and many can do as good or better job. Avoids shipping cost or risk of transport damage. Have them replace the coupling caps and a few resistors with better ones while it’s there. That amp can sound a lot better with a few upgrades. Some techs like to throw in a Triode/Ultralinear switch too.
decooney
2,334 posts
 
If you have not already done so, maybe you could ask the folks at Sound "N" Music or GER Global Electronics Repairs there in Panama if they know of someone who can come to your place, like an old TV repair person use to do in the old days :)  Might be worth a try.  

Sound 'N' Music Electronics store in Panama City, Panama
Address: Av Central, Plaza Cinco de Mayo, Panama Phone: +507 212-1801


decooney
2,334 posts
 
I was just thinking that Sound N Music may know of someone in your region maybe within a 4hr circumference. Some of these hidden techs work out of a basement of their homes, and shops contract and send out to them. It's not always openly shared or advertised. 

In any case, someone who understands basic wiring and point-to-point circuits will be most helpful. I'm friends with an ex-Cary Tech who sometimes does work, rarely, and that would require costly shipping too.  Worth it to keep looking around you for that less-known tech in your area. They do exist some times, adult easter egg hunt. Good Luck.  
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