Alba lcd32880hdf

[tom66]

Re: Alba lcd32880hdf

If you had 24V before make sure all your jumpers are in place like the ones for STBY ON/OFF...

[sordids999]

Re: Alba lcd32880hdf

tom if i use the jumpers on
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 14 +5VSTBY_2

then i only get 5v from the blue wire and no 24v

if i use a jumper on
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM

i get 24v on invertor but the blue cable is 0v

i can short the backlight to come on but it just flickers using
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 12 +12V

[tom66]

Re: Alba lcd32880hdf

I'll try and have a look at this tomorrow. Bump up the post if I forget.

I do remember when I jumpred the backlight on the 26" 17PW25-4 it flickered for the first 3 seconds... I think it wanted to stabilise the output first which the main board would normally wait for.

[sordids999]

Re: Alba lcd32880hdf

ok thanks m8

[tom66]

Re: Alba lcd32880hdf

OK, so to confirm, the backlight is flickering continuously? What is the 24V doing? Is it stable?

[sordids999]

Re: Alba lcd32880hdf

i can short the backlight to come on but it just flickers using
pin 6 STBY_ONOFF
pin 8 BL_ON/OFF
pin 10 B_DIM
pin 12 +12V

yes the 24v is stable i can only get the backlight to flicker by touching pin 12 with a wire ,if i leave the wire in pin 12 then it trys to start backlight but it fails so i have to keep shorting pin 12 to make the backlight flicker

[tom66]

Re: Alba lcd32880hdf

What about if you also connect pin 28 on the connector going to the main board?
This is by far and away the most complicated backlight jump I have ever seen, it is usually very simple, I cannot think why it would not work.

[sordids999]

Re: Alba lcd32880hdf

just to confirm im doing the correct pin sequence tom ?
via pictures

[selldoor]

Re: Alba lcd32880hdf

Could always be bad back light ccfl? or Inverter transformer?

[sordids999]

Re: Alba lcd32880hdf

already tried another invertor luckily i had a spare

[sordids999]

Re: Alba lcd32880hdf

ok again tom thanks for your help ill leave this for a rainy day got my latest project bought 4 days ago PHILIPS 47PFL7603D/10 for £30 supposed to keep cutting out but still waiting for this to happen

[selldoor]

Re: Alba lcd32880hdf

Some people seem to have had problems and success with changing the high voltage blue caps see here

http://www.tv.quuq.org/forum/index.p...e;topic=5167.0

[sordids999]

Re: Alba lcd32880hdf

yeah thats a different psu with the built in blue caps that runs the invertor ive changed them before and fixed this but this tv is a different version with the invertor board seperate

[tom66]

Re: Alba lcd32880hdf

I can't remember which is pin 1, to check you would need to find the 5 grounds which hang off pin 1, for some reason Vestel have seen fit not to label it!! Ugh.!