Philips BDS4231R/00 PDP S423D-YD07

[notallbad]

Any initial thoughts?

Picture perfect at times but then shows like this:



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[tom66]

Re: Philips BDS4231R/00 PDP S423D-YD07

What is the plasma panel in this model? LG, Samsung, Fujitsu-Hitachi?

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

It says PDP Module (S42SD-YD07) then has Model : S42SD-YB05 but is a Samsung Manufactured 2005

I suspect one of the Sustain boards.

[tom66]

Re: Philips BDS4231R/00 PDP S423D-YD07

Samsung, my bet on buffer or control board.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Any tips for what to look for or how to troubleshoot?

I have found a couple of swollen caps on PS bd in the Buffer power supply area, what should Va be reading, 70V?, the 2 swollen caps are located under the heatsinks (one each side) seen clearer in the second photo, pictures to follow:



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[tom66]

Re: Philips BDS4231R/00 PDP S423D-YD07

Swollen caps could certainly cause your issue. Will await pics.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Thanks, added pictures and also changed the suspect caps, both 680uF 50V which were slightly lower than rated and tolerance allowance 511uf and 323uf.

There are 2 boards that have constant flashing LED's I'm guessing fault indicators,

Samsung LJ41-03075A
LED labelled LED2000

and

Philips 3139 123 6093.1 Wk509.2
LED not labelled but its the only LED on the board that I can see.

The screen is also flashing on and off, this occurred before changing the caps.

[shovenose]

Re: Philips BDS4231R/00 PDP S423D-YD07

Hi, please attach your images to the forum not using external image hosts. It ensures the images will not disappear at some point down the road, increases security, and generally makes it easy for us. Thank you

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Sure, sorry.

PS bd: LJ44-00101C PS-424-PH Rev 0.7

Connector SY
D5V measured as 5.1v
Vg measured as 14.93v
VScan measured as 188.3v
Vset measured as 196v
VS measured as 204v

Connector SX
VS measured as 204
Ve measured as 108
Va measured as 14.93
D5V measured as 5.1v

Cn8005 (Buffer)
Va measured as 69.4v
D5v measured as 5.1v

I could be reading the label on the connector SY wrong, is there such a thing as Vg or is that Va, in which case 14.93v is considerably low as Va should be 70v according to the label on the Panel which reads
Va 70v
Vsc -190v
Vs 209v
Ve 110v
Vset 198v

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

It is in fact Vg and should read 15v so that is ok.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Following this manual there are no error detection codes on the PS alarm board, the LED just comes on solid as do the 2 leds on the PS board.
i.e remove all connectors except mains input, place jumpers on relevant pins on all 3 connectors as indicated and power up.

https://cdn.badcaps-static.com/pdfs/...f0f06d8dcc.pdf

[tom66]

Re: Philips BDS4231R/00 PDP S423D-YD07

If LEDs are on control board these are NOT fault indicators but in fact status OK indicators.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

OK, but should they be blinking?

[tom66]

Re: Philips BDS4231R/00 PDP S423D-YD07

Yes. They usually do.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

I have found an issue which is the cause or at least not helping so shall resolve before proceeding further.

It appears that there is a wiring harness that goes to the logic board with burnt out wires, LVDS perhaps?.

Not sure I will be able to repair as its immediately next to the connector so may have to source another.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

So having removed the shroud it has revealed further damage to the wiring insulation.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Having repaired the wiring harness the tv has no change on picture.

Now I'm getting 8 blinks from the Error Bd on the PS bd, No Ve, and yet when I do the PS board test according to the Service Manual it all checks out ok. So it must be logic bd playing up.

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

One for the bin I think, X-Main now blown a fuse and I.C.

Kind of my own fault actually, forced the tv to power up! hey ho such is life

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

X - Main board

I.C U4002 blown

[notallbad]

Re: Philips BDS4231R/00 PDP S423D-YD07

Tv starts up but poor picture due to x-main out and picture is still constantly switches on and off, not the tv just the picture.

Customer Service Mode : 123654

Error codes all reading zeros