Rca l42wd22 audio problems

[xredhawk]

Hello, im hoping to find somebody who has solved audio problems on this lcd tv,audio comes on for awhile ,then goes out after 10 mins very distorted sounding when on, any help would be appreciated!

[budm]

Re: Rca l42wd22 audio problems

If you hook up the powered speakers to the Auido line level output RCA RED/WHITE jacks, do you get the distorted sound there also? We need to find out if the problem is in the sound processing/ preamp/ or power amp section.

[xredhawk]

Re: Rca l42wd22 audio problems

ok ill have to go to the radio shack and get a adapter to try , thanks ,ill repost back soon

[xredhawk]

Re: Rca l42wd22 audio problems

i get nothing out of rca jacks, i get sound thru head phone jack but it goes out after 5 minutes , i power off the tv it comes back on then goes out after a minute,sound is better but still a hissing sound

[tom66]

Re: Rca l42wd22 audio problems

Would you say it's very similar to what comes out of the speakers? It sounds like either power supply bad (low voltage to audio processor, possibly main board voltage regulator fault) or bad audio processor IC.

[xredhawk]

Re: Rca l42wd22 audio problems

its weird i go into rca sound menu to set maxium volume , menu says to hold the ok button to test maxium volume and amp kicks in and internal speakers work, seems like sound gets better as tv warms or i power on and off tv ,

[xredhawk]

Re: Rca l42wd22 audio problems

i had a bad cap on the psu , im thinking i have more that needs testing.

[tom66]

Re: Rca l42wd22 audio problems

The bad cap could easily cause that. Have you checked the supply voltages coming from the PSU? e.g. a low or unstable 5V or 12V might cause this.

[xredhawk]

Re: Rca l42wd22 audio problems

im getting 11.89 volts going into the audio amp

[tom66]

Re: Rca l42wd22 audio problems

Have you checked other power supply voltages too, like 5V and 24V?

[xredhawk]

Re: Rca l42wd22 audio problems

i just saw this fix with the same symptoms,

[xredhawk]

Re: Rca l42wd22 audio problems

this tv has been in the shop before when first bought about 3 yrs ago, fuse mod has already been done

[xredhawk]

Re: Rca l42wd22 audio problems

i bought set off guy at worked that told me it was put in the shop shortly after he bought set

[xredhawk]

Re: Rca l42wd22 audio problems

maybe cold solder joint to bottom fuse?

[tom66]

Re: Rca l42wd22 audio problems

Perhaps new fuse has failed again?

[xredhawk]

Re: Rca l42wd22 audio problems

top fuse reads good , repair man that did mod , put too much solder on top, cant tell if he got it good on bottom.

[xredhawk]

Re: Rca l42wd22 audio problems

thanks tom! tv working good now

[dozer69]

Re: Rca l42wd22 audio problems

my RCA L42WD22 is doing the same thing. what did you do to fix it

[dozer69]

Re: Rca l42wd22 audio problems

my sound comes on for a few minutes but goes out. if you turn the tv off it comes back on for a few minutes