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It may take some searching but try these three ways:

Get in to your local Radio Shack when they aren't busy and talk to the staff. Most of the staff there have a personal interest in electronics and if you get lucky, you'll find one that may have information to help you.

Next, try telephone calls and emails to RCA. Even if they only release circuit diagrams to dealers, you might be able to talk to someone who can let you know the values of the resistors you are after.

Finally, find a forum that discusses electronic repairs and equipment. Get the right forum and there will be someone who may have detailed knowledge of the product.

Happy hunting.

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Q: In an RCA STAV-3880 receiver purchased from Radio Shack how can one get a schematic to identify resistors R619 and R621?
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