I'm with TwoDog's. You can do a SX-750 (minus the tuner) yourself for about $50-60 in parts. There are plenty of guys on AK who have done rehab's, restorations, rebuilds. Google SX-750 and one of the hit's will be an AK thread. Just under the listing will be a link to MORE SX-750 Threads from AK. Click on that and you'll get most everything that is on AK for the 750 (as long as it has SX-750 in the title. Some have links internally to other links for rebuilds.
You didn't tell us your skill level so I'll presume you are not skilled in soldering, reading a schematic, etc. Basic tools are your greatest outlay of $$$$. Soldering Iron, Digital Multimeter with Diode setting, side cutters, alligator clips, needle nose pliers, etc. Practice soldering on a cheap expendable, board to learn how to remove and install caps, resistors, transistors, etc. Learn how to read the markings on the boards for orientation of transistor legs, + or - on caps, Diodes, etc.
Also learn how to read the schematics. Note that the schematic shows the circuit electrically, not how it is in the unit. You'll find resistors, caps, etc. in places that are counter intuitive, but they are electrically in the same place in the circuit. These are just a few of the things you'll need to learn
BEFORE You dig into the 750.
Deep cleaning is fairly simple. Get a 1" chip brush and some 91% Isopropyl alcohol. CRC QD Electronics Cleaner (Home Depot) is used on the fins of the tuner Variable capacitor. Nothing else. This gets sprayed on the fins (both sides) with the fins UNMESHED. DO NOT USE WD-40, Oil, DeOxit, or other materials on the fins. Capacitance is air tuned and any dust, dirt, or any other material changes the capacitance and now you have a tuner NOT in Tune. So CRC QD Electronics cleaner ONLY (It's a NON RESIDUE CLEANER). There are some slide springs on the grounds of the V.C. at the shaft that need lube so you do this. Away from the unit, spray some DeOXIT FADERLUBE (F-5) into the lid. Using a toothpick, dip the toothpick and get a drop of Faderlube on the pick. Then touch the slide spring where it touches the shaft at the separator walls. Each spring get a drop. DO NOT let it get on the fins. If it gets on the fins, you need to re-do the fins withthe CRC.
With the rest of the unit, scrub the board(s) with the paint brush and a vacuum cleaner. With all the dust, dirt, etc. removed, wet the brush with the alcohol, place the 750 on it's side (transformer on bottom) and start from the top. a small spray bottle with alcohol will help keep the alcohol from drying out while scrubbing. When finished, rinse it from top down with the CRC QD Electronics cleaner. Place a fan close to it and put the fan on high and let it blow on the unit for overnight.
Once it's clean, plug it in to a DBT with a 75W bulb on it. NO SPEAKERS, All controls centered. Volume All the way down, LOUDNESS and TAPE MONITORS OFF, Selector on AUX. Turn it on watching the DBT. If everything is ok, the bulb will flash bright and over about 3-5 seconds will dim down. If it stays bright there is a short or the bulb is too small. Try the next size larger (100W) bulb. Incandescent bulbs only. NO CFL's, HALOGEN, LEDS, etc. Good old fashioned Incandescent bulb only. But a 75W should be just about right for the 750. Try the 100W. If it now dims and stays dim the 75W was too small.
Hook up a pair of expendable speakers and test the unit in all modes. If everything is ok, then you can start on the rehab/resto/rebuild. There are parts lists for the 750.
http://www.audiokarma.org/forums/index.php?threads/recap-question.334748/ The list in Post 6 is 6 years old, but Mark the Fixer will update it if asked to do so.(He'll vet the list and post the updated list with a BOM so you get one stop shopping @ mouser.) Post the list in and ask for a vetting.
There are probably updated lists off that but this one is in the
"Pioneer Recap Lists" Sticky suggestion! http://www.audiokarma.org/forums/index.php?threads/pioneer-recap-lists-sticky-suggestion.457663/ Thread
If you want a newer list you'll have to dig a little for one of the newer threads. They're out there but I don't have the time to dig for them.
There are a bunch of guys who have 750's here and they'll be glad to give you some help and guide you along on this journey. Spending $400-$600 for a shop to do a complete recap is out of the realm of reality. And you don't know what you get at the end. Doing it yourself you know what went in to the unit, and you know the builder/tech, and it's way cheaper on the wallet. Plus doing it yourself builds your confidence, and you get the satisfaction of showing it off to your friends and telling them "I rebuilt this".
Two Dog's; My "LUCY" is also a rescue Dog. Jack Russel Beagle Mix. I've never had a dog who can go thru toys as fast as she does. Even the KONG stuff has no chance with her. She's hard headed, obstinate, and a typical female(changes mind more than I change socks. Don't leave shoes, slippers, or hats where she can reach them or they will end up in the back yard, shredded to hell and back. But she's totally loyal to my grand-kids, and lets then play with her. Their dad (#1 son) she doesn't like and will get between him and the kids and let him know that she will tear his head off and s*%^ down his neck if he does anything to them. I think it's due to him having a male pit bull mix rescue. I get the same response from her after going over their house. #2 son she tries to lick off his face. Go figure. The only thing I would change is her energy level. She's a bit too energetic for us. She's a great dog (I've only had one other female dog in my life) potty trained, and is smart as hell. I'd rather have a male dog, but the wife and son brought her home without my input. LUCY has become my shadow and constant companion. And she has separation anxiety so i take her everywhere I can get away with it. She's good in the car. She needs her nails ground down every 3-4 weeks or she'll tear your skin up. But she loves going to get them done and has her own manicurist. She's 4 in May. This pic taken at about 7 months.
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) what would that cost me. At the end of the day I would love to do this myself - but whatever the cheapest solution is may be what I go with. I can't take this to any shops in LA without them trying to upcharge the hell out of me for a repair.
