Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: chrissie jones on February 21, 2014,09:18:38

Title: baird inverter board wanted
Post by: chrissie jones on February 21, 2014,09:18:38

4H+v2988.031....must be cheap..or swop..

Title: Re: baird inverter board wanted
Post by: sparky on February 21, 2014,12:51:20

Try EMOS

Title: Re: baird inverter board wanted
Post by: marky mark on February 21, 2014,17:49:24

Lets go mad....


Lets try repair

Lets face it, you've probably diagnosed wrong. Have you done any checks?

Title: Re: baird inverter board wanted
Post by: chrissie jones on February 21, 2014,18:51:02

checks on what...marky.

Title: Re: baird inverter board wanted
Post by: sparky on February 22, 2014,05:31:21

WHAT'S THE FAULT AND WHAT HAVE YOU CHECKED

Title: Re: baird inverter board wanted
Post by: chrissie jones on February 22, 2014,06:05:31

24v present

Title: Re: baird inverter board wanted
Post by: Keith on February 22, 2014,06:30:03

Hi

Do you have 'back light on ' signal from the processor?
Any oscillations on the transformers?
this type of inverter usually have feedback testpoints from the tubes, check them all you may find one is very different, caused by a faulty tube.
Have you tried 'forcing' the inverter on

Keith

Title: Re: baird inverter board wanted
Post by: chrissie jones on February 22, 2014,06:37:45

thanx kieth...ill try that now.

Title: Re: baird inverter board wanted
Post by: Davy on February 23, 2014,14:11:28

I do my checking with a 3.7V Li-ion battery from a scrapped cheapie camera, a toy camera would take better shots..... apply +ve to the P on and, the -ve going to the metal work, with the main supply ON the inverter should start up.

Also checked power boards this way by forcing them ON, that little battery saved a lot of work.

Have you tried forcing the inverter ON, could be the backlights as well, is it possible to hook any up?

Dave