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Old 8th February 2004, 05:53 AM   #1
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Default measuring a transformer Marantz 2245

A friend of mine has this receiver and he wants to measure the transformer to replace it. It was in a shop for a year under the "care" of a dubious technician. The guy couldn't really ever figure out what was wrong with this thing other than to say that he felt that the transformer was bad. Apparently the fuses are ok, but it doesn't power up. Sounds fishy. Anyways I was wondering if some one could help me with measuring a transformer, how this is done precisely. Everyone's help is truly appreciated!!!
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Old 25th October 2005, 06:13 PM   #2
llib is offline llib  United States
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doing without a marantz for a year is no fun. since you really don't know what is wrong, go to ebay and buy one that is in working order.
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Old 25th October 2005, 10:21 PM   #3
anatech is offline anatech  Canada
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I can't believe a simple problem like that could keep anyone stumped for long.

It could be the lamps are all burned out and the amp has a problem. There is a fuse in series with the fuse holder on some models. The power switch can go open, or the primary may be open (really, really rare). Or the tech may have killed it.

The power transformer is not easily replaced. If it is in fact damaged (not working) it would be easier to buy another 2245 and make one good one from the two, since who knows what will be wrong with teh other one. A very nice unit when fixed up.

-Chris
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Old 25th October 2005, 11:02 PM   #4
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Quote:
Originally posted by anatech
The power transformer is not easily replaced. If it is in fact damaged (not working) it would be easier to buy another 2245 and make one good one from the two, since who knows what will be wrong with teh other one. A very nice unit when fixed up.

-Chris
Just like Noah -- 2 of everything is a good idea.

Reproductions of the manuals and schematics are always available on EBay.

ps -- I got my Marantz in the Millburn Township Dump -- I don't know when another 2245 will show up, however. There was a pair of the "Larger Advents" in the pile yesterday (Monday, weekdays are good for dumpster diving), but I didn't bother to pick them up.
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Old 25th October 2005, 11:04 PM   #5
anatech is offline anatech  Canada
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I would absolutely love to be able to go dumpster diving. They won't let us up here.

-Chris
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Old 26th October 2005, 09:35 AM   #6
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'Bad transformer' is generally lame tech-talk for 'I'm clueless as to what's wrong and I don't wanna mess with this thing'.

Oops..I just noticed the date of the original post. I suspect that some resolution has been implemented by this time...
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Old 26th October 2005, 01:03 PM   #7
anatech is offline anatech  Canada
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Hi Glenn,
I don't know about the resolved part. The poster may have given up by now. I wonder why the thread poped up again?

I agree with you, the tech was not very skilled at all.

-Chris
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Old 26th October 2005, 03:04 PM   #8
ilimzn is offline ilimzn  Croatia
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IIRC 2245 was before the time when everyone started including thermal breakers into the windings of their undersized transformers which probably means the 'tech' doesn't want to mess with it or has cooked the tranny himself, so either lazy or clueless...
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Old 26th October 2005, 08:27 PM   #9
anatech is offline anatech  Canada
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Now ilimzn,
The sad thing about that is that Marantz was known to have supplies and output stages built heavier than other mass market manufacturers. I think I've only ever seen one shorted transformer from before the thermal fuse days. And I know the idiot tech who killed it too.

-Chris

Edit: still learning to spell.
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