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Equipment Repairs => LCD TV forum => Topic started by: danjcarr1 on October 28, 2013,16:58:45

Title: Alba LCD32880HDF Intermittent sound
Post by: danjcarr1 on October 28, 2013,16:58:45

Hi all.

I have an Alba LCD32880HDF that keeps losing sound after been on for a while.

Has anyone came across this issue before or know of a fix?

Thanks,

Dan

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: OldLes on October 29, 2013,04:32:17

Try tracing back from the speaker connections until you find sound chip. When the sound goes off, try a quick spray with freezer. If that gets sound back, replace the chip.
Les.

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: watteau on October 29, 2013,06:59:28

Hi,

You could try a factory reset - Menu, 4, 7, 2, 5,

If the chassis is type 17MB60 or 17MB62
a common problem are the four SMD capacitors
C1075, C1076, C1077, C1078 (Pins 3 ,4 ,11 , 12 of the Audio Power Amp I.C.).
Change from 470nf to 1uf 6.3v (they are situated near to I.C. U168).

Regards

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: danjcarr1 on November 28, 2013,17:56:06

Thanks guys will give this a try

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: bakunoi2 on November 29, 2013,20:38:57

Hi, I also had this problem and after digging out turn out to be the sound ic. Check the caps before but I would consider changing the ic. (Not so expensive)
Good luck !

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: In_Focus on November 30, 2013,17:29:44

Poor crimps on the cable harness between the PSU to the main board can cause symptoms of intermittent loss of sound or going dead on many Vestel chassis.

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: sordids on November 30, 2013,17:45:14

I have the same model where I just have the unit flashing on standby all voltages on PSU seem fine but I can't even get the side buttons to work so maybe the main board is shot so could this be the caps need changing on the main board
Thanks

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: In_Focus on December 01, 2013,15:07:02

Quote from: sordids on November 30, 2013,17:45:14

I have the same model where I just have the unit flashing on standby all voltages on PSU seem fine but I can't even get the side buttons to work so maybe the main board is shot so could this be the caps need changing on the main board
Thanks

99 times out 100 it's usually the PSU.

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: Davy on December 04, 2013,15:39:24

I had it on a couple of times on Alba and clones, the problem was the speaker in my case it was just the one channel.

The flexible wire that runs to the voice coil..... one lead had mysteriously corroded, the it'd work for a while then as the program got interesting off it went, I scraped away the black gunge on the cone to get a soldered connection to no avail.

I wouldn't care but I can get better sound out of a tin can as diaphragm... they are lacking in the sound department and we're in the 21st century.

Can you not scope the inputs and outputs of the chip?

Dave

Title: Re: Alba LCD32880HDF Intermittent sound
Post by: sordids on December 07, 2013,12:03:00

Quote from: In_Focus on December 01, 2013,15:07:02

Quote from: sordids on November 30, 2013,17:45:14

I have the same model where I just have the unit flashing on standby all voltages on PSU seem fine but I can't even get the side buttons to work so maybe the main board is shot so could this be the caps need changing on the main board
Thanks

99 times out 100 it's usually the PSU.

ordered a new psu still the same so any ideas ?