Funai F-788 2.0 Speaker Intermittent Problem Repaired
I have received these speakers again; it was repaired not long ago. This time the problem was one of the speakers not working.
First of all I have checked EP Pin. This EP cable is EP to RCA Type checked with continuity test with multimeter found OK.
Now it is time to open the sound box and diagnose inside. By testing with multimeter it shows 5 ohm on continuity test that means speaker is ok.
On visual inspection look what I have found:
I found one channel output wire is shorting to another. I furthered test the corresponding components that have connection with this circuit but all components seems to be good.
So I have re soldered the wire by making its tip shorter and on testing by connecting speakers to my PC, now it starts working fine.
On final packing I realize that front metal net of speaker box is rusted as you see I have picked up photo from my old article of same speakers. So I decide to give surprise to the owner of this speaker.
Hence I have done a surprise makeover-see the photo below:
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check out his previous repair article in the below link:
https://www.jestineyong.com/laptop-intermittent-battery-charging-fixed/
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Merlin Marquardt
August 27, 2015 at 10:14 pm
Very nice repair and nice new grilles.
Henrique Jorge Guimarães Ulbrich - Brazil
August 27, 2015 at 10:40 pm
Good job, Yogesh. Just a doubt: what is EP?
yogesh Panchal
August 28, 2015 at 12:32 am
Dear thanks for your comment . EP is short form of "Ear Phone" Stereo Pin.
Chris
August 28, 2015 at 3:52 am
Congratulations, I like when I see people repair old equipment and save them from junk but the world from junk too.
Good job done !
Vipin Sharma
August 28, 2015 at 2:54 pm
Good Job Sir, these all articles help me to find the Fault.
jim asch
August 29, 2015 at 8:30 am
very nice info thank you
Allan
August 29, 2015 at 12:33 pm
Great stuff Yogesh. Keep on sharing your repair experiences as they are much appreciated. Thanking you so much brother.
albert
August 29, 2015 at 10:18 pm
Excellent job, sir..
Humberto
September 1, 2015 at 1:04 am
Good repair Mr. Yogesh. Thanks god the short-circuit did not damage the audio-out (IC or transistors)