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HUMMING/CHATTERING NOISE ON SANYO TV

HUMMING/CHATTERING NOISE WHEN TV TURNED ON. SOUND SUBSIDES WHEN PRESSURE APPLIED TO TOP OF COMPONENT. IS THIS A RELAY ISSUE.

TROUBLESHOOT TO COMPONENT:
MODEL: SANYO AVM-1903
TYPE DH1U
12VDC
TV-5
DEC

YOUR ASSISTANCE IS APPRECIATE.
THX,
KEN ROEBUCK
KEN@KENROEBUCK.COM

HUMMING/CHATTERING NOISE WHEN TV TURNED ON.

MODEL: SANYO DS19350

BEFORE SEEING THIS SITE, I TROUBLESHOOT MY SELF AND SUSPECTED RELAY "TYPE DH1U 12VDC TV-5 DEC".

MY QUESTION IS CHANGING THIS RELAY WILL FIX THIS PROBLEM OR SOME OTHER COMPONENTS CAUSING THIS RELAY TO FAIL.

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  • NBTAMIL Mar 23, 2009

    Excellent, thank you both Lee2fixit's and OldishFella,

    I know that, it is some AC leak through DC coil that is why chatterring was occuring, but I was not sure which cap is leaking.

    I am kind of busy w/ my kids now. After I fix my TV i will post my result.

    Thanks again.

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Confirmation: Lee2fixit's solution also worked on a Sanyo 19" TV Model DS19580with 'buzzing relay'. Chassis carriessimilar relay (Type DG1U 12VDC II TV-5 8A 250V~ also by DEC) at location RL601and a 25VDC 470uF electrolytic cap at C622. After confirming the relay was sound and finding no obviously faultedcomponents tied to it, replaced the cap. Bingo, normal operation and a quiet relay. Will post a follow-up ONLY if the fix failsbefore the rest of the TV .. it's almost10 years old after all. Thank youLee2fixit and FixIt.com.

Posted on Mar 05, 2009

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I got a 13" Sanyo AVM-1304 with the same problem today. Found The picture and sound were okay, but the relay chatter was very loud. Found a couple of notes on other forums saying that changing the filter capacitor would fix it. (On that model it was C022, a 470MF 25VDC electrolytic cap). I changed it about an hour ago and so far so good.

Posted on Jul 06, 2008

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  • Lee2fixit Jul 06, 2008

    Next day - still working like a champ. Set has been on for about 6 hours with no further buzzing/chattering noise from the relay. I didn't mention it before, but this problem started after the set had sat unused (plugged in, but not watched) for several months. Guess the capacitor continued to age while it sat, but the noise didn't appear until the relay was called on. Your unit might have a different component number or rating - look for a small filter cap right next to the relay.

  • Lee2fixit Feb 15, 2009

    Just an update.... after 6 months, the fix is still good. It was definitely a bad capacitor causing the relay to buzz loudly. The replacement capacitor cost $1.59.

  • Lee2fixit Feb 15, 2009

    Just an update... after 6 months the fix is still good. Replacing that $1.59 capacitor saved this set from the trash heap!

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I had the same problem with a ds25390 board. it was a 470@25v (replaced with 470@35v costing $1.25) at location c622 and an A1015y (crosses to a 2sa1015y) transistor ($1.75) at location q623. if you look at the schmo (http://elektrotanya.com/sanyo_ds25390-ctv.pdf/download.html) you will see the cap filters a/c from the coil of the relay. the transistor provides the switching to turn the relay on. while the transistor might have not been bad, it showed as an base/collector open. i replaced it anyway as the a/c would have hit the collector of the A1015y and its a $1.75 part.

Posted on Jan 10, 2013

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I detected the noise from the relay and replaced the relay with a substitute purchased from Radio Shack < $10.00. The buzz / chatter noise continued. I read other posts and decided to try replacing the capacitor. Mine was a 25v / 470uf. Radio Shack had a 35v / 470uf for <$2.00. I installed the new capacitor and the t.v. is working GREAT! I could not have done this repair without the help of FixYa Community. Thanks!!!!!!

Posted on Feb 06, 2010

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