Question about Standard (CRT) Televisions
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
YOUR ASSISTANCE IS APPRECIATE.
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.
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
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
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
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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