Tonight I replaced the main filter caps, recapped and replaced transistors on the protection board as well as the phono preamp (equalizer) board, and replaced all of the bulbs with soft white LEDs. I added .1uf bypass caps to the new filter caps, along with the bleeder resistors. The only thing left to do is recap the tuner board and align the tuners (and when the come in, replace the diodes on the power supply board). The bad thing is that in order to recap the tuner board, I'll have to take the dial cord loose. Has anyone else done this with an SX-850? Is it a pain to get back on? Here's photos of the power supply board after the recap as well as the front of the receiver after replacing the bulbs.
Oh, I almost forgot one other question I have. With 120VAC input to the unit, I'm only getting 43 volts rail voltage. According to the schematic, I should be getting 45, and the rebuild that I referenced above also shows 45 volts. Could the current diodes somehow be bringing that voltage down a little somehow? Just curious if there's anything I can do to bring it up to spec.
More to come....
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