Found a decent looking SX-580 at a yard sale $5 To make a long story short, everything seems to work, except no output. Cleaned all pots and switches. Made sure ground chassis screws were tight. All fuses are good. I don't think the tape monitor switch and/or function switches are the problem (for now). I bridged the tape REC / PLAY RCA's and engaged tape monitor and still no output. REC out to another device works. Going from another device to Tape PLAY IN did not work. I found an AK thread here where Mark the Fixer said you can try jumping across R401 with a DMM set to DCA. I tried it, and I got very good output, equal in both channels. In that thread Mark also said you could temporarily try a metal film resistor to trouble shoot, but a permanent replacement should be a fusible resistor. I'm guessing that's part of the protection circuit since the SX-580/680 has no protection relay? The service manual from HiFi engine shows R401 to be 33 ohm, RF1/4PS 000J. So I assume that's a 33 ohm 1/4 watt resistor. The only local available is a Radio Shack 33-ohm 1/2 watt carbon film. Will that work? or do I need to have a 1/4 watt rating? Thanks.