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My Telefunken Studio M1 is burning


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#1 stevenrob

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Posted 08 February 2017 - 02:57 PM

Hi guys. I have just received this boombox in very good condition. I plugged in and suddenly a burning smell appeared :bang: . I also did a test with batteries and it is the same problem; Do you think it is possible to repair this boombox easily? I have not dismantled it yet because I do not have the right tool to remove the buttons.

Thank you



#2 Reli

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Posted 08 February 2017 - 04:04 PM

Does it work OK?  Just smells bad?

 

You don't need tools to remove the back cover.  Just remove the screws from the side and pull the rear cover off.



#3 baddboybill

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Posted 08 February 2017 - 06:25 PM

Ill bet it was set on 120v and you plugged it into 240v

Hi guys. I have just received this boombox in very good condition. I plugged in and suddenly a burning smell appeared :bang:. I also did a test with batteries and it is the same problem; Do you think it is possible to repair this boombox easily? I have not dismantled it yet because I do not have the right tool to remove the buttons.
Thank you
Hi guys. I have just received this boombox in very good condition. I plugged in and suddenly a burning smell appeared. I also did a test with batteries and it is the same problem; Do you think it is possible to repair this boombox easily? I have not dismantled it yet because I do not have the right tool to remove the buttons. Thank you


An allen wrench is needed to remove some knobs. ;-)

#4 stevenrob

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Posted 09 February 2017 - 12:18 AM

hello, it is already on 220v. I have bought an allen wrench (so little) to Amazon.  



#5 Superduper

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Posted 09 February 2017 - 08:16 AM

Burning smell when powered up is a very bad sign.

#6 baddboybill

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Posted 09 February 2017 - 08:30 AM

hello, it is already on 220v. I have bought an allen wrench (so little) to Amazon.


Well you didnt have to be so snobby!!!! I also think there is a fuse in these which may have blown and might cause burning smell.

#7 blu_fuz

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Posted 09 February 2017 - 10:29 AM

I think the translation Bill was:

 

"Hello again guys. It is already set on 220v. I have bought an allen wrench from Amazon because I don't have one that small. " 



#8 baddboybill

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Posted 09 February 2017 - 11:00 AM

I think the translation Bill was:

"Hello again guys. It is already set on 220v. I have bought an allen wrench from Amazon because I don't have one that small. "


Lol. Ok sorry. ;-)

#9 caution

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Posted 09 February 2017 - 11:09 AM

Haha. My four-year-old niece was doing that all weekend. Pretty sure it's a USA thing. "huh-lowww!"



#10 BoomboxLover48

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Posted 09 February 2017 - 11:46 AM

I think the translation Bill was:

 

"Hello again guys. It is already set on 220v. I have bought an allen wrench from Amazon because I don't have one that small. " 

That is correct! Good job Joe!



#11 Superduper

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Posted 09 February 2017 - 12:00 PM

Except that this fellow is in France so his hello is literal and one of manners and politeness and not sarcasm.

Haha. My four-year-old niece was doing that all weekend. Pretty sure it's a USA thing. "huh-lowww!"



#12 caution

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Posted 09 February 2017 - 12:07 PM

Which is why I said it is a USA thing. Hello! :cool:

Sorry about veering off course, I guess we should be talking about the boombox on fire.



#13 Superduper

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Posted 09 February 2017 - 12:14 PM

Smoke, not fire. Hellooooo?!? Haha.



#14 stevenrob

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Posted 09 February 2017 - 12:43 PM

Bonjour les gars, I have understand What badboybill say (I think). My hello was a real hello  :-)

In france this is "allo. 'We use this word when we phone and also for sarcasm.

 

 

 

this girl is famous in France...

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#15 caution

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Posted 09 February 2017 - 12:46 PM

Smoke, not fire. Hellooooo?!? Haha.

:lol: :lol: :lol:



#16 baddboybill

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Posted 09 February 2017 - 01:07 PM

Bonjour les gars, I have understand What badboybill say (I think). My hello was a real hello :-)
In france this is "allo. 'We use this word when we phone and also for sarcasm.




this girl is famous in France...


Lol. Actually i would have thought different if you said bonjour!!! Lol. Sorry. :-(

#17 BoomboxLover48

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Posted 10 February 2017 - 07:21 AM

Bill reminded me a new word "snobby"  :-D  :w00t:  :lol:  :lol:  :lol:

 

I hardly used it...

 

 

Now what is the current situation with the box?

 

I never had any problem like that with a box. 

 

Possibly this could be from the AC to DC power supply circuit. 

 

I would sniff around.. and look for any charred areas.

 

I would try to make it work on 12V DC and see if things go well. 

 

 

Here is a good link ...https://boomboxery.c...1-power-supply/

 

~Royce



#18 AE_Stereo

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Posted 10 February 2017 - 08:42 AM

My five cents.

 

Was it received in mail?

There is chance of something broken during transit, such as the power supply or speakers coming off their legs.

For this reason, if I get a box in parcel, the first thing I do is to open and see the internals before powering up.

 

Can you feel/listen anything loose by tilting it in all directions? If so, do not do any further powering up tests.

Open and examine the internal condition first.



#19 stevenrob

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Posted 10 February 2017 - 10:39 AM

Bonjour,

 

internal conditions seem ok. But now the boombox seems to be dead :jawdrop:  with battery or AC (no reaction, no burning smell but all fuses are good...) But I'm going to try with 12V DC. 



#20 Superduper

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Posted 10 February 2017 - 12:56 PM

Usually, when there is burning smell upon power-up, it's due to either the power connections was reversed, or there is a short somewhere or incorrect voltage setting.  The most likely components that can fail are:  Capacitors popped (if voltage was reversed).  Transistors burnt (if shorts).  Rectifiers (there are 2 bridge rectifiers in this boombox), especially if there was a short somewhere.  Power resistors if overcurrent conditions, usually again due to short circuit.



#21 BoomboxLover48

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Posted 10 February 2017 - 05:36 PM

I would definitely try to power up on 12V DC.

 

Let us see what happens. Be EXTRA careful about polarity. Double check before you connect. 

Then we can isolate it to AC to DC power supply failure. :yes:



#22 Superduper

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Posted 10 February 2017 - 05:45 PM

I would definitely try to power up on 12V DC.

 

Let us see what happens. Be EXTRA careful about polarity. Double check before you connect. 

Then we can isolate it to AC to DC power supply failure. :yes:

 On his very first post, (post #1), he already indicated that the burning smell was present on AC or Batteries.  The failure to power up now is probably related to the burning smell which, presumably whatever was heating up is now toast.



#23 BoomboxLover48

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Posted 10 February 2017 - 05:52 PM

 

I would definitely try to power up on 12V DC.

 

Let us see what happens. Be EXTRA careful about polarity. Double check before you connect. 

Then we can isolate it to AC to DC power supply failure. :yes:

 On his very first post, (post #1), he already indicated that the burning smell was present on AC or Batteries.  The failure to power up now is probably related to the burning smell which, presumably whatever was heating up is now toast.

 

My mistake! I didn't see that. Oh my!



#24 stevenrob

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Posted 11 February 2017 - 02:05 AM

:w00t: I think I'm really in trouble with my Telefunken. If somenone can say me what parts I could change...  Thanks

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#25 MyOhMy

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Posted 11 February 2017 - 08:34 AM

Bill reminded me a new word "snobby"  :-D  :w00t:  :lol:  :lol:  :lol:

 

I hardly used it...

 

 

Now what is the current situation with the box?

 

I never had any problem like that with a box. 

 

Possibly this could be from the AC to DC power supply circuit. 

 

I would sniff around.. and look for any charred areas.

 

I would try to make it work on 12V DC and see if things go well. 

 

 

Here is a good link ...https://boomboxery.c...1-power-supply/

 

~Royce

 

Ha!  I see what you did there - current situation:lol:  :lol:  :lol:

 

 

 

(I'll get my coat..................................................)



#26 IVH

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Posted 11 February 2017 - 04:26 PM

Bonsoir fellow frenchman,

Just my 2 cents. Wouldn't it be a good idea to connect it to AC and then check everything with a voltmeter (from the power supply up to the remaining of the box)?

That would be a good start I think, but again, that's just my opinion.

Salutations,

inse.

 

PS: I will be careful with 'hello' too from now on, never thought about it this way ;)



#27 stevenrob

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Posted 11 February 2017 - 04:50 PM

Bonsoir, je suis toujours dans la merde, but I have found a guy who can help me. I'm going to buy parts to repair the telefunken. I'll give some news.

I hope I will be able to repair it because it is almost mint condition. 

Now, I'm going to bed



#28 stevenrob

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Posted 16 February 2017 - 08:01 AM

Hi,

 

A lot of problems with this boombox  :bang:

Overheated, plastic broken in the tape deck (I have repaired with a peace of aluminum), a broken spring.

Actually, I'm changing resistors and capacitors...

 

I hope it will be a happy end...

 

 

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#29 blu_fuz

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Posted 16 February 2017 - 11:06 AM

This is turning out to be a project., good luck!



#30 superlew

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Posted 16 February 2017 - 11:46 AM

I had to put my 1M aside, as it needs so much work and I have so little time. Glad to see you're sticking with it. I'm finding those gray ECCOM caps are pretty bad. I pulled few (7 total) from mine in random spots to check them. Every single one was pretty well out-of-spec. That's when I decided I'd come back to it in the Spring.

Yup - I plan on doing a wholesale re-cap. I know a lot of guys frown upon a full re-cap, but if they're all bad, they're bad and they ain't coming back to life. :ghost:

 

Would you mind posting a detailed pic of the power switch, if you have the front open? The wrong switch is installed in mine and I'm lucky it didn't burn the house down. I can't find a part number for it and I'm hellbent on getting it sorted sooner or later.