Philips 42PFL7603D/10 image problems

[jasonr2000]

Hi guys I have the above TV and all of a sudden the picture has gone what appears to be a negative image

I get the same issue no matter what input I select
And also get it on a normal black screen it shows as very bright white

Could it be a fualty t-con board as all was fine until yesterday


Any help is appreciated

I will post pictures if need be as well

Thanks

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Here is an image of the problem guys

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

One more update guys the as15-f chip on the lvds / tcon board gets way too hot to the touch if u touch it when the panel is on it burns u it has got heat pads on there does that mean its a bad tcon ??

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Anybody have any advice ??

[habanerocat]

Re: Philips 42PFL7603D/10 image problems

Try some freezer spray on the hot chip and see what happens. It might just verify the faulty board.

[budm]

Re: Philips 42PFL7603D/10 image problems

One more update guys the as15-f chip on the lvds / tcon board gets way too hot to the touch if u touch it when the panel is on it burns u it has got heat pads on there does that mean its a bad tcon ??

Yes, bad AS15.

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Thanks guys will source a replacement tcon and update with my findings

One more thing could the faulty chip be replaced if it comes as easier to source ?

[zomi]

Re: Philips 42PFL7603D/10 image problems

If you are able to solder.
Replace just the chip they are £3- £5 off ebay

[Alastair E]

Re: Philips 42PFL7603D/10 image problems

Aye--AS-15 chip--Yet Another casualty!

Such a common fault can give all sorts of brightness/neg image/colour distortions and used on a wide range of LCD/LED T-Con boards.....

Ive started buying the things in bulk!

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Hi thanks for the reply I have no issues soldering

So I'll get the chip and see how I go

But will also source a replacement tcon just in case it goes wrong

Thanks guys

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Is there anyway I can prevent this from happening again ?

[budm]

Re: Philips 42PFL7603D/10 image problems

Is there anyway I can prevent this from happening again ?

Nothing that we know of, it is one of the reason I do not get used board since we do not know when the IC (if it is not already replaced) will last.

[Alastair E]

Re: Philips 42PFL7603D/10 image problems

Well--Not really, Its just a fairly hard driven part and has a finite lifespan.

You can try applying a silicone heat-pad (Dead-Toad) to conduct the heat from the chip to the steel T-Con tinwork cover, but I suspect its not actually a dissipation effect, more a cycling effect breaking down the (Lead-Free RoHS Crap) solder between the chip die and the package case, leading to local on-chip overheats on a microscopic level and failures....

--Its probably a few years old currently,--so if it gives you another 2-3 years, summit else will die and kill the set anyway!

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Thanks both for the replies it already had some heatpad on there and it connects to the chassis as the TV is old now if I can get 2 years out of it then that's OK I'll replace the TV before then


The board I've been able to find is a refurbed board from emos

So will try that as a backup if my solder skills don't save the current board

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

An update for u guys new tcon came today resolved the problem almost but the picture is darker than normal

Any ideas how I solve this ?

[Alastair E]

Re: Philips 42PFL7603D/10 image problems

An update for u guys new tcon came today resolved the problem almost but the picture is darker than normal

Any ideas how I solve this ?

Well---

Its Probably the replacement T-Con's AS-15! I had a Philips 40" not so long ago that had a darkish but otherwise fine picture--AS-15 was the problem!

Worth checking the 20 odd ref voltages marked, Vgama1 to 20 odd.

They should form a slowly climbing value, each one a bit more than the last....

If you around Swansea--I have a spare AS-15.....

[Arfi]

Re: Philips 42PFL7603D/10 image problems

1- is the T con from exact panel type T420**** rev *** including rev number? ?

2- Is the LVDS lead inserted correctly in t

3-have you updated the firmware to the latest?
(you can check by pressing 123654 on your remote control and confirm version)

4-have you done factory reset into the factory mode ?

if you done all this 4 d look at possible faulty T con again if your tv was working fine prior to T con going faulty

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Thanks both for the reply

I'll contact emos TV repairs as the replacement tcon is from them

I've got my original tcon still and an as15-f chip that I purchased new

But when I saw how small the pins was I decided soldering it on wasn't for me way beyond my skill

Ive gone in to service mode and based on what the service manual states my option code is also wrong

But I don't see my option codes on the TV anywhere so should I leave them alone ? And get emos to issue another tcon ?

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

And yeah tcon was identical in all ways part number and so forth

Did a software update and factory reset

[jasonr2000]

Re: Philips 42PFL7603D/10 image problems

Here are some pics of how the image looks guys

I've also noticed there is some image retention also

But it does go away

And I'm near aberdare so not as close to swansea