Philips 42PFL5603D Only backlight and white led.

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

OK as you say please update us- I may be on holiday when it happens so
hope it goes well for you.

Hello again mate selldoor and the rest that helped.
Problem solved after replacing the AS15-F with a AS15-G (it's the same), please mark it as solved for future use.
Now i got a problem with a Toshiba 22DL833 , i opened a new thread check if you can give me any advise.
Thank you very very very much selldoor

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

OK as you say please update us- I may be on holiday when it happens so
hope it goes well for you.

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Ok i ordered 5x AS15-F from China for 5USD, i'll wait them to arrive and i'll let you know, thank you very much for the help !
P.S : I contact the local tv technician and confirmed me that the AS15-F is highly defective

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Depends on the price, i can get a used t-con from China for 37usd (less then 25euro), i'll check the price of the As15, just for curiosity.

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

I added an edit about one of the regulators.

AS15-F is known to be a problem chip - could you replace one if you had to or is it
going to be a new board?

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

I cant see them either - perhaps the 902 IS a 1117 so 3.3 would be correct
903 is still a mystery.
VGMA - See top right of the tcon pictures there are 22 test points with
capacitors underneath som have the labels above otherlabels are to the left.
Just start at one end and list the voltage on each one

Also datasheet for 50117

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

You mean the IC ? It's a AS15-F , here is the datasheet https://cdn.badcaps-static.com/pdfs/...7296e32c12.pdf
I'll try to found more Info of the Regulators meanwhile.

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

Well those are bad - see this thread heard for bad and good.
https://www.badcaps.net/forum/showth...est#post475353

Problem with yours is it may be down to the voltage regulators

What is part number on U21

EDIT Found this:

So I reckon that means the 50117B-G should produce 1.8vdc

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Ok got them, measured from Left to Right.
The pins 1 until 10 have 0.38v the 11 has 0.50v, the 12 0.20v (suspicious) the 13 until 21 have 0.5v and the 22 has 0.097v (suspicious too).

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Ok , i'll start in a while so i will have the results soon.

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

I cant see them either - perhaps the 902 IS a 1117 so 3.3 would be correct
903 is still a mystery.
VGMA - See top right of the tcon pictures there are 22 test points with
capacitors underneath som have the labels above otherlabels are to the left.
Just start at one end and list the voltage on each one

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

The U902 writes "50117 B-G 72175" and the U903 writes "APR 738" although i can't find anything about it on google, strange.
Sorry but i don't understand very when the english electronic dictionary, what do you mean by "vgma readings" ?
Thanks for helping mate

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

Doesnt sound right You still measure the stub - it gets its voltage from the pad
thogh 3.1 may be correct but as I asked I need the part number to confirm

The other one U903 seems to be off - looks like it gets pin1 voltage from the
U903 but pin 3 doesnt seem right if its measnt to be 3 its too low and if its meant to be 2.5 its a bit too high again need the part number.

What are the vgma readings on the 22 test points - should be between 20 and 0 vdc

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

By both, I meant both T-cons. Not 2 fuses on one. Could be something else dead on them I suppose but that was the case with both mine.

Oh ok I'll try to use a external source (such a dvd player) to check the sound, i'll found the source with the r/c .Unfortunately mine isn't blown so we will keep searching. Tell me something, your panels had exact the same issue?
Only backlight and white led ?

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Those VRs are on the Tcon U907 and U903

ok got the measurments, the U902 has 0v on the left pin, the middle is on the air by default and the right one has 3.315v on it.
The U903 has 3.319v on the left pin, 0v on the middle and 2.841v on the right.

[aaronwt6]

Re: Philips 42PFL5603D Only backlight and white led.

You mean from the PSU ? I'll check and let you know as soon i'll return to home, i'll try to upload more clearer photos too . I'm between PSU and T-Con just because i tested 3 mainboards and all give the same behaviour. Thank you very much for the reply!



I checked the T-Con yesterday but i found only one fuse that unfortunately wasn't blown and had 11.77v on both sides.
Are you sure the T420HW01 V2 T-Con has two fuses ? I made a red circle on the one that i found, please point me the other one.

By both, I meant both T-cons. Not 2 fuses on one. Could be something else dead on them I suppose but that was the case with both mine.

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

Thanks Stephen you are correct miss-type!!

[StephenU]

Re: Philips 42PFL5603D Only backlight and white led.

Those VRs are on the Tcon U907 and U903

Selldoor
I've zoomed in and looks more like U902 and U903. Not 907?

[selldoor]

Re: Philips 42PFL5603D Only backlight and white led.

Those VRs are on the Tcon U907 and U903

[Andreasbest]

Re: Philips 42PFL5603D Only backlight and white led.

Pictures could be clearer - I think I see 2 voltage regulators U992? U903?
can you test those and say what the part numbers are

You mean from the PSU ? I'll check and let you know as soon i'll return to home, i'll try to upload more clearer photos too . I'm between PSU and T-Con just because i tested 3 mainboards and all give the same behaviour. Thank you very much for the reply!

I'm going to go ahead and just put my guess in that the T-con is bad. You probably aren't getting sound because you either don't have a source connected, or you are on the wrong input. I recently fixed one of these, as well as the Magnavox model with the same issue and T-con as yours. Check the fuse on the T-con board for continuity (the small blue board). Both of mine were blown.

I checked the T-Con yesterday but i found only one fuse that unfortunately wasn't blown and had 11.77v on both sides.
Are you sure the T420HW01 V2 T-Con has two fuses ? I made a red circle on the one that i found, please point me the other one.