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Funai Computer Speaker Intermittent No Power Repaired

By Jestine Yong on November 7, 2014

Customer brought his Funai Speakers for repair with the complaint of intermittent no power. First I have checked the power adapter and it was producing 19 VDC and working fine. I had to open up the speaker for further troubleshooting.

Once the cover was removed I found one of the variable resistors (potentiometer) was broken.

The customer confessed that he accidentally pressed on the variable resistor and causing it to loose and drop out.

After visual inspection on the loosen parts, I found there was nothing wrong with the variable resistor and I reassembled it.

After installing back the variable resistor I removed the “On / Off “switch and cleaned it with Contact Cleaner and resoldered the joints.

I then powered it up and no longer have intermittent power problem and the sound was good too after attaching it to the computer.

This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.

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15 Comments

gcharal

November 7, 2014 at 11:37 pm

Hi Jestine,

good and easy repair.
I have a suggestion.
I spray a little drops of "Red Philips Contact cleaner" when i service
pots or any variable resistor.
This spay has little oil in its formula to help pots rotate smoother.
This is a sample link "http://madnicomputers.com/detail.php?id=409#2"
But many times i have read that this method maybe attract dust.
Is this true?
Thanks a lot.

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- Jestine Yong
  
  November 8, 2014 at 8:55 am
  
  HI Gcharal,
  
  I uses that too.
  
  Thanks.
  
  Jestine
  
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- randy warren
  
  November 8, 2014 at 10:21 am
  
  is that like Deoxit? yes, oil (oleaic acid-based)cleaners can attract dust and cause more problems, some techs swear by it, some, myself included, swear at it, really not liking that stuff any more, or use it VERY sparingly...
  
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Robert

November 7, 2014 at 11:41 pm

Good job Yogesh. Thanks for the article.

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Osman Al Sinnary

November 7, 2014 at 11:57 pm

Good Job
Thanks Yogesh ...

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Merlin Marquardt

November 8, 2014 at 12:58 am

Very good. Repaired not replaced.

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randy warren

November 8, 2014 at 10:18 am

hard to believe that the back end cup on a pot just fell off, those things are tough to remove, smells like the customer was monkeying around with that pot, or it was improperly assembled when the speaker was made to begin with...

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Joshua oloo

November 8, 2014 at 12:38 pm

Thanks and keep it up sir !!

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biruk aweke

November 8, 2014 at 12:50 pm

NICE REPAI THANK YOU.

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beh

November 8, 2014 at 10:39 pm

MR PANCHAL: one time more you did a great job.

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Luciano Khware

November 9, 2014 at 2:47 am

Hi Mr. Panchal,
Wonderful and job well done! Keep it up Sir.

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Plinker

November 9, 2014 at 9:56 am

I always enjoy your articles!! Please accept my thanks...

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moniem

November 9, 2014 at 4:55 pm

good and easy repair

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Andre Gopee

November 11, 2014 at 5:37 am

Hi Panchal, nice repair Job...Sometimes use WD40 first and then spray it out with contact cleaner and that works for me.

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Humberto

November 11, 2014 at 9:16 pm

Good repair, keep up and congratulations.

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