measuring a transformer Marantz 2245

naimgame · 8th February 2004, 05:53 AM

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!!!

llib · 25th October 2005, 06:13 PM

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.

anatech · 25th October 2005, 10:21 PM

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

jackinnj · 25th October 2005, 11:02 PM

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.

anatech · 25th October 2005, 11:04 PM

I would absolutely love to be able to go dumpster diving. They won't let us up here.

-Chris

EchoWars · 26th October 2005, 09:35 AM

'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...

anatech · 26th October 2005, 01:03 PM

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

ilimzn · 26th October 2005, 03:04 PM

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...

anatech · 26th October 2005, 08:27 PM

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.

8th February 2004, 05:53 AM	#1
naimgame diyAudio Member Join Date: Feb 2004 Location: West Coast	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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25th October 2005, 06:13 PM	#2
llib diyAudio Member Join Date: Oct 2005	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.

25th October 2005, 10:21 PM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	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

25th October 2005, 11:04 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	I would absolutely love to be able to go dumpster diving. They won't let us up here. -Chris

26th October 2005, 09:35 AM	#6
EchoWars diyAudio Member Join Date: Dec 2002 Location: Left of the Dial	'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...

26th October 2005, 01:03 PM	#7
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	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

26th October 2005, 03:04 PM	#8
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	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...

26th October 2005, 08:27 PM	#9
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	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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