Marantz 2270 overhaul


My first piece of audio gear was a Marantz 2270. As it happens I still have it, and plug it in from time to time. It still sounds better than some Best Buy gear, but it's getting a little more veiled than it used to and just seems to need an overhaul. I could just check and replace the caps and resistors and polish it, but I'm thinking of making some changes.

For one, I may actually upgrade the caps. Does anyone have any suggestions? Has anyone already upgraded the caps in this era of Marantz receiver?

I'll probably change out the binding posts. It's got the tiny and rather fragile, thumb operated pin slots. I've got other preference, but it seems like it would be easy enough to switch these to barrier strips. Any thoughts on other options for binding posts?

I'd also like the bypass the startup relay as this doesn't get used every day, and the relay never works when it's been sitting idle for a few months. Does anyone have any other suggestions for tweaks to the design?

I'm also planning to build a new hardwood case for the receiver. I've got the original case made from partical board with a veneer. It's in decent condition, but I enjoy wood-working, and could make something really nice. Any suggestions for the wood? Appearance is a large part of the motivation, but I'd like to at least somewhat consider vibration/isolation when considering materials.
Ag insider logo xs@2xjazzerdave
Oh, I've opened it up several times in the past. I know what I'm doing to myself; for some reason I still want to do it. I'm fairly certain this is a project that will last for a long time.
I tried to post the URL of a guy who sells rebuild kits but the moderators deleted it. I've done the rebuild on a 2230 and it wasn't easy. There are lotsa boards and they're wired tightly together. There's about a hundred caps that need replacing, so you'll need yards of solder wick. A few of the transistors will probably need to go, so be sure you can substitute old for new. And new LEDs just dont have that inviting 70's blue glow, but you can still find OEM replacement lamps on eBay. Good luck.
I think I've already found the guy you're talking about. He sells rebuild kits, LED mods, and specific replacement transistors (among other things).

This seems like a project that will fill plenty of my time without costing me an arm and a leg. I'm trying to give myself something to do that will fill my need for tinkering without messing with any of my main gear.
That sounds like the guy. And yes, it will take you a while :) Be careful desoldering. Those old circuit boards are fragile--the circuit print will lift if you get in a hurry. You might also want to look on the web for the wiring diagram; it was very helpful in my case. Cell phone photos helped a lot, too. It took me about a month, an hour or two each evening, to finish, but the effort and its result were well worth the time.
Yes, pictures and the wiring diagram(s) are definitely in my plans. Would you recommend just buying the rebuild kit? Or would it be fine to source parts individually?