Just a note sharing my appreciation of sources. Depending on the specific model you are working on there may be great information available. My Sansui 990 recap, transistor replacements, meter lights are all done by me, who started out never having desoldered. A free service manual download was such a great find. Special thanks to Novalux, XRay Tony, Oleg...there are others...hats off to all. Thankful my baby is working and I didn't destroy her in the process!!