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RTR: Sony TC-500, smokes when line out connected

ChemExposure

New Member
Hey, how's everyone doing?
I got a Sony TC-500 from a friend about a year and some back, everything works as it should except... Something burns whenever I connect the line out. It smells like solder, I haven't taken the unit apart yet, and probably wont for another couple of days. I'm pretty well wondering if anyone else had this issue and remedied it before I go deeper into this.
The service manual mentions the line outs are wired to a 600ohm winding on the transformer, but the smell is not similar to the ones from my experiences with dead transformers. The unit functions perfectly fine after the smoking incident as well, I know it's foolish to try it immediately after a failure, but at the end of the day it's not worth too much to me. It'd suck if it ended up not working though since everything about this unit is pretty well as clean as the day it was made, minus the dust. The unit is pretty well useless to me if the line-out's do not work, making it entirely a novelty.
I have no history of the servicing, it could have original wax caps for all I know so I'm thinking I'll start there.

So thanks for the advice if you have it; I'll try to get some pictures going when I do a dissasembly if they turn out considering my broken camera screen.

EDIT: It may also be worth mentioning that the speakers were on at the time. The manual says this is a normal function and should not harm the unit, but who really knows what went on inside.
 
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In the absence of any other replies...
You need to exercise the utmost caution here. There is the possibility of the chassis being live, perhaps caused by failed insulation in the motor-run capacitor. So, whatever you're connecting the line-out to is sinking the fault current via the earthy side of the RCA jack. And that could equally be you. Get a competent repair shop to perform an insulation test and go from there. (And don't power it up until you've done this!)
 
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