2. amps-preamps
  3. 165903-139433

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

128x128richfrank
richfrank's avatar
richfrank OP
34 posts
 
Hello decooney. Great info. Sorry to say that Sound & Music are a retailer of home sound equipment and have decent technicians that know how to INSTALL these equipments. They do very little repair.
They're recommending someone else, but the truth of the matter is that it is most difficult to find someone who knows about point-to-point wiring. Everyone knows about chips and circuit boards and mother boards.  I will keep on trying.
richfrank's avatar
richfrank OP
34 posts
 
Hello imhififa. Your "link" takes me to a page that is not inexistence. Looks like it is from Italy? Don't know, but I could not get it open. Sorry my friend.
decooney
1,956 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.  
richfrank's avatar
richfrank OP
34 posts
 
Sr oldhvymec. With all due respect to someone that appears to know what the problem is and knows how to fix it ...... It does no good to give me a "hint". This is not a school atmosphere. I have a problem and I am going to the "forum" and am asking for help. I cannot solve this problem either thru Cary Audio or by getting into the amplifier to track the problem if I do not know values. I know what a resistor is, what a cap is, lugs, etc. but if I do not have a value attached to the resistor or cap in the schematic and have no voltage values, I am stuck. So please, if you know the answer, don't give me a hint or tell me to open a 6-pak, HELP ME FIND THE SOLUTION. If you want to charge me for your knowledge, let me know, but don't give me hints. I am not a kid!

richfrank's avatar
richfrank OP
34 posts
 
Does anyone have any idea the type and voltage/amperage requirements are for the power LED in the Cary SL-70B amp?  I have changed the resistors in question, and when I plug in the amp, the power fuse 3 AMP SLOW BLOW ---> BLOWS UP.  I'm thinking the power LED may be shorted perhaps? But where do I get a new one? What is the model number? When I walk into a tech shop and ask for a Power LED what other info is needed to obtain the correct one?
More to discover