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"Back from the dead" - Marantz 2330b receiver

Snade

Snade

humble AK member
As some of you may know, last summer I picked up some Infinity RS-II speakers at a garage sale.

These speakers are known as the "amp killers" because they can drop to 2 ohm loads.

Despite warnings from fellow Infinity owners, I tested the speakers with my Marantz 2330b and despite its 130 watts per, I fried the output transistors and the amp died.

With the help of AK-member and tech - MarktheFixer, the receiver now sings again. Mark replaced all eight output transistors and repaired a problem with the AM tuner. This thing now sounds fantastic.

Thanks MarktheFixer.

Marantz 2330b with eight new output transistors (bottom of photo in center of the heat sinks)

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Front view of the 2330b on Mark the Fixer's work bench.

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2330b back home in my family room with the wood back on

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Current setup: 2330b with Dual 1228 turntable and Allison CD-8 speakers

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Cheers, Snade
 
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Cool!
If you put it in a rack or something where the wood cabinet won't fit, can I have it?
Also, if you ever put it in a dimly lit room or closet, I'd be willing to trade you faceplates.
Just trying to help a guy out!
 
isn't it amazing how some manufacturers take as much pride of the looks and layout of the inside as they do with its appearance on the outside? I've had a few different receivers kicking around here at times and I'd have to say that Pioneer comes first and Marantz a close second in the inside looks department.

Glad you have it running again. Mark is a great guy and great asset around here.
awesome stuff!
 
Very nice setup.Glad you have it up and running again.You should be so lucky to have someone like markthefixer be so close by.
 
(Homer, if you are reading this, the sx-3900 is spread out all over the bench, I blew off the bathroom for a while, hanging plastic instead of taping, mudding, painting and putting in a tub surround)

My ears were ringing after just letting the volume out to 5 (of 10) and I feared for my 60w speakers... Reminded me of being at Powerman's this summer.....

The AM tuner showed evidence of multiple attemps to correct the AM's intermittent.. LOTS of soldered wire wraps.... but NOBODY lifted the tuner board to get a look underneath... and what did I find:

AN UNSOLDERED PAD... factory from the looks of it...

Sez I " IT CAN'T BE THAT EASY????"................ well before, tapping a pen lightly on the frame would make the AM cut in and out...

So, I soldered it.... works like a charm. SOLID as a ROCK....

Snade got lucky when he blew the outputs, he didn't take out the drivers or anything else (I checked BEFORE the power amp got any juice) with the overload.Of the 8 outputs, the amp had 6 original marantz outputs, an ecg and an nte. Two of the original marantz outputs shorted, a pnp and npn on the same pair... hard rail short, blew the main fuse... One of the dead TO-3 outputs either had TWO mica washers under it, or the original had separated, with NO thermal grease in between..... can you say COOK?????

Being the conservative sort I recommended an octet of MJ21193/4's and he agreed.

I LIKED the fact that the amplifier assembly can be EASILY removed as a module, with 4 connectors (2 signal in, 2 power in and amp out) that are inherently reliable with their simple design.

Unfortunately the manual leaves a bit to be desired, especially the FM alignment instructions...
 
All very helpful information. Knowledge is power so keep up the good work guys.
 
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