I recently came into possession of a vintage Marantz 2230 that seems to have an issue with left channel phono input. With normal setup, only the right speaker is outputting any sound. When I switch the RCA cables, same thing — only the right speaker plays anything. I have also used AUX to confirm that the left speaker can output sound correctly, which leads me to believe this is an input issue. I am now wondering if this is something I can fix myself. If so, I would greatly appreciate any guidance. If not, I am in Montgomery County PA, and I would love to know if anyone has had success with local shops that could get this done! Thank you in advance!!
Vintage Marantz Service Near Philadelphia or Self Diagnosis and fix
- Thread starter new2mar
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RunOutGroove
Addicted Member
Honestly, I wouldn't bother with a fix for that kind of thing. If the only issue is the phono input, I would just buy an external phono preamp, which you can get for probably less than the cost of a repair and get better sound than the built in one of that receiver. I have the big brother to that amp, a 2270, and long ago switched to external phono preamps. I'm on my third and far best sounding one, a Schiit Modius II, and that thing was still less than $200...
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If you decide to fix yourself of all the circuit problems it could have that one will be one of the easiest to fix, repair.
Blue Shadow
Waiting for Vintage Gear from this century
You might recover the channel with a proper cleaning detailed in this thread:
Repair is an option at a number of Phila area shops. A refresh might be in order if you want to keep this unit and one of the guys that does a lot of Marantz is near Boothwyn. He will not repair and return. He only does full restorations. Doesn’t want units coming back for a new noise from another transistor that got tired. Prefect for a keeper unit or if priced right allowing you to sell a known fully serviced unit. You can contact him for pricing.
Welcome to ak.
The Idiot's Guide to Using DeOxit (revisited)
Moderator’s note: we have an updated and condensed version of the following here: https://audiokarma.org/forums/index.php?threads/tldr-deoxit-guide.850968/ I was asked to re-post this semi-ancient post that has been long buried in the archives and I was reluctant to re-post anything already in...
audiokarma.org
Repair is an option at a number of Phila area shops. A refresh might be in order if you want to keep this unit and one of the guys that does a lot of Marantz is near Boothwyn. He will not repair and return. He only does full restorations. Doesn’t want units coming back for a new noise from another transistor that got tired. Prefect for a keeper unit or if priced right allowing you to sell a known fully serviced unit. You can contact him for pricing.
Welcome to ak.
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preacherJohn
Active Member
I would check all swtiches and control pots for dirt. Sometimes a little cleaning will fix the issue. Play something on that input and start switching things back and forth to see if it comes in, or comes in and goes back out. A little Deoxit may be your repair.
If its not something cruddy in the selector switch, you're likely looking at some fault in the phono preamp if the aux and other sources work normally. That narrows it down fairly well. Some poking tells me its the P700 board, looks like 3 transistors per channel and an array of the usual passive bits and bobs.
also good lord the schematic is dense for this. They were really giving it their all to pack it onto a single page.
also good lord the schematic is dense for this. They were really giving it their all to pack it onto a single page.
