Marantz 2230 restoration

I picked up a 2230 a while back with the intent of cleaning it up, recapping, etc. It does have a couple minor physical things that need repair, e.g. speaker connects, an unoriginal tape monitor button....... but it does work, with the speaker balance favoring the right channel slightly.

I'm finally getting around to starting the project and I took off the cover last night to do some surveying. It's pretty filthy inside and there appears to be more rust than I anticipated. Is there an easy way to clean all this or will I have to sand it all off? Is there an easy way to clean the boards as well? I've included some pictures to give an idea what it looks like. Im also a little concerned about the transformer, as shown in the pic it looks like the strip of metal on top is bulging..... should the transformer be replaced?

Thanks for any advice!

Its hard to tell the degree of rust or corrosion from the photos, sometimes after all the dust and grime is removed its not as bad as you might anticipate. Once the chassis is clean (lots of elbow work) a quick wash with a phosphoric acid solution (commonly sold as rust remover), and rinse will remove any pinpoint rust and leave a coating on the bare metal that will inhibit further rust. The covers on the FM board and other shields can be cleaned and Nickel plated if you are compulsive.

Clean the boards with Q-tips and ETOH, again just lots of elbow grease.

I just stripped my Dynaco SCA-35 chassis to bare metal by dipping it in Muriatic acid (HCL) to remove the zinc plating and then sent it off to the local chrome shop and had it nickel plated (I did scan the printing on the back cover first so I could make up a silk screen to re-print it). This cost about $160 but suspect would be much less for items as small as a shield or board cover.

John

alright, I figured it would just be a lot of elbow grease. Being nice and shiny isn't a hug priority, just clean and rust free. Is it best to remove all the parts at once to clean it, or work around them as I go?

Remove all the parts and you've probably created a project you'll never finish so just work around things, Q-tips, etc. Part of the reason to use ETOH is that it will evaporate quickly and not leave a water residue promoting further corrosion.

Yeah, I imagine it would be a confusing mess if I took it all apart at once! Clean it as I go it is, then.