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Marantz 2270 Fuses

7

71Westy

New Member
Hey all,
New member..
Sad story, I asked my 6 year old to flip my record (which she is normally very skilled at). When it didn't play I went in and noticed the arm was up. I dropped the arm not knowing that she had the volume at in insane level. Now I have no lights no power. There is no fuse not he back so I opened it up and found four glass fuses 2x 1A, 1 x 3A, 1x 5A. The 3amp is blown. My question is what is each of these for and is this my problem?
I can not find anything that states what each of these is for.

Thanks in advance.
Shawn
 
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Its just odd that I can't find anything on line that indicates what these four fuses are for. Its also odd that there is no main fuse in the back of the unit..
Thanks anyway Pete.
 
It has to be an international multi voltage model as they were the only ones to have those fuses and I've never come across any of that info in any manual, even the original.

Replace it and pray.
 
bryans12v said:
It has to be an international multi voltage model as they were the only ones to have those fuses and I've never come across any of that info in any manual, even the original.

Replace it and pray.
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Thanks, that would explain it i guess. I will be praying. This may be what forces my hand to take this in and get the cap's done. Its prob overdue!
Cheers
 
While it may be tempting to just toss a new fuse in, I would look into making a dim bulb tester if you don't already have one. If there's a short on the output stage you could pull alot of current through parts that still may be good.

Also couldn't hurt to pull the outputs and test them before powering up.
 
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71Westy said:
Its just odd that I can't find anything on line that indicates what these four fuses are for. Its also odd that there is no main fuse in the back of the unit..
Thanks anyway Pete.
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Yeap. International model. Very cool. I had a multi voltage 4100 quad int. I believe they're fuses for the secondaries but I do know that the lights have thier own fuse. If you have no lights AND no sound, there maybe another issue with only 1 blown fuse. Make a DBT! Don't want to do more damage to a rare unit!
 
and the million dollar question.... why did the fuse blow... they don't blow just because. They blow since too much current went through it. Why did the current spike?
 
culcuhain said:
and the million dollar question.... why did the fuse blow... they don't blow just because. They blow since too much current went through it. Why did the current spike?
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It all happened when the needle hit the record and it was turned up to 11. The needle bounced and it popped really loud.
 
Funny you should post this! I refurbed a 2270 a couple of years ago and the owner stated it would sometimes blow this fuse. I got it back and traced it out and it is the mains input fuse. A non international unit uses a 4A fuse. The service manual, page 7 (page 9 in PDF), states that when wiring as 120V to change the fuse to 4 amp! So use 4A.

I plan on tracing out the other 3 fuses and post the info on the subforum and look into how to get the info to the AK database.

I'm agreeing with Bryan's suggestion to build a DBT before powering up. DBT = dim bulb tester and the idea is to safely insert an incandescent light bulb in line with the mains power input. If the outputs are indeed blown into a shorted state the light bulb will be bright and limit the current, else it will flash bright briefly and dim down to a very soft glow if it's a 60W or so bulb.

P.S. Not putting a label inside by the fuses to alert the poor consumer was a serious omission I think! Grrrr!
 
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In my 2230 there is a label for the fuse values but I was wandering if they should be fast or slow blowing type? May be one more thing to consider before replacement.

And I would avoid using a 6 year old as a remote control... ;)
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Thanks for all the help guys. The DBT didn't do anything odd so I went with the 4A fast blow. Everything now works perfect. I really would be interested to find out what the others are for. If the main is a 4amp (stated as 3 under the fuse holder) I wonder what the 5A would be for.
What this means is that I have once again avoided taking this in for a recap which I think it needs. Any good recom on a good tech in Toronto would be great.
Thanks again lets hope rBuckner gets around to tracking those other sometime...
Be well.
 
rBuckner said:
Good question. I've never seen a slow blow fuse in any Marantz ever so I would go with the odds and stay with the fast ones.
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The only one I've ever seen call for a slo-blow is the 7T but it's only a 1\16th amp.

Glad to see the OP got it going and nothing terrible happened. Remember to check that volume the next time you drop the needle.
 
bryans12v said:
The only one I've ever seen call for a slo-blow is the 7T but it's only a 1\16th amp.

Glad to see the OP got it going and nothing terrible happened. Remember to check that volume the next time you drop the needle.
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Thanks to all for the help. I am sure you will see me a bit more active in the coming months, I have my eye on a Model 18 that I'm going to push the button on.
Be well.
Shawn
 
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