CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

[Texas_Bob]

I have an HP model: CPTOH-0603, inside a sticker that says PDP50x3R010 so I assume Toshiba made it. I have checked all internal fuses and VA+, VB+ and the +5v feed to all boards and they are all good. This is the first plasma I have experience with so I don't know if the display itself is shot or there is a common driver board for the whole screen. The screen has specs on it full H and V so I'm guessing the Y and Z cards are working, but it's a guess. It has a very dim blue center box (non-16x9) and speckled horizontal diagonal drive lines full screen. I've given everything a close physical, no obvious problems. On the power supply board there is one blue LED when powered off and 2 when on, I don't know if that is relevant or not. Is there a posting/link that gives board layout and/voltage test/values you could share? Google seems less than useful in this regard. My user pic is a pic of the screen.. Thanks in advance..

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

This is an LG Plasma inside.
Is there any way to feed it video and see what it looks like?
Also, can you record a video of the fault? Hard to see with that small pic...

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Well, I had a DUH moment this morning after hooking up a source to it and fiddling with the menu buttons long enough to get it to the DVI input. Anyway, you can see by the movie there is a full screen, dim, with the drive lines/retrace over the whole screen. Like I said, my first plasma experience. The HP logo is really clear when it loads, the ipod makes it look over driven but it's not. I only had a PC to connect to it in the shop so it complains about no DVI audio input but makes a full screen picture. The limit to upload is 1.9m, a little tough to get a movie in that, here is a URL to the movie:

http://www.zinnel.net/Plasma/BootUpMovie.mp4

Thanks in advance... Attached is a screen print of the final screen after its done booting.

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

I'm going to say control board or main board problem, and I'm leaning more towards the main board. I saw in the video (Linux Mint?) you had it hooked up to a computer. What if you try using it on, say, one of the composite video signals? This would lower the resolution, if the erroneous lines change, it indicates a main board fault. I ask this because I noticed the pattern over the HP logo is different, although it's possible that it is just less visible on that.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Thanks for the response.. Yes, Linux Mint is based on the latest ubuntu but has a much better interface.. But I digress, The lowrez bootup movie is here:

www.zinnel.net/Plasma/BootUpMovie2.mp4

The light you see over the HP logo screen is a reflection from the window it does look normal (except for the retrace speckles), sorry.. Anyway, same result at low rez.

I've seen the input board (the one with all the RCA jacks) called a main board and also the main logic board called the main board, I would guess you are referring to the main logic board. Yes?

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

OK, although it looks the same, the difference in the logo is clear -- this is almost certainly a main board problem. In this case the main board is the one with the video inputs on it and the connector which goes to the control board. If you need help locating either, you will need to post clear pictures of the chassis.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

I appreciate the help.. There are 2 boards with inputs on them. The The main logic board is behind them, (pic: inside2.jpg). composite, DVI and PC connections are on the board on the bottom left, straight video and video/audio out(s) are on the right. Thanks again..

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

You WILL need to get better pictures, I can barely make anything out... sorry!

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

I found the good camera.. Here are some better pics..

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

The main logic board is behind the input board on the left. If you keep clicking on the picture it zoom in pretty well.

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Looks to me like the board with the VGA and DVI on it is the main board.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

I'll get one ordered and give it a try. I'll let you know how it turns out. Thanks for all your help..

[johnboy1313]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

If you can, look for one on ebay with free shipping and a return policy. On the slim chance that the problem is something else, you might want to be able to return the board.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

That's what I did, thanks for the advice.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

That's what I did, thanks for the advice.

Found one for $49 w/guarantee and a return policy.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Well, That cured a majority of the problem. There is still some static bars when it boots and after it's up all the way. (see attached).. Any clues will be appreciated.

Bootup and images after main board replacement: http://www.zinnel.net/Plasma/IMG_2706.MOV and http://www.zinnel.net/Plasma/IMG_2707.MOV

The main board brought back the clarity and brightness, almost there...

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Hmm, that looks like you got a main board with a different defect! Perhaps the failure rate is high for this model? Did you see that same patterning on the old board?

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Not at all. The old board was very dim and had the retrace lines across the whole screen. (see one of the older pictures above). I can contact the seller and return this one for replacement if you think that is the issue. Defiantly NOT a Y or Z SUS board though right?

Thanks in advance..

As an aside; Erroneously I had thought, as was the case in the old analog world, that the SUS cards were akin to the horizontal and vertical driver but I'm finding the purpose of these boards is not like that at all. And, the problems they cause are not detectable as insufficient screen V&H filling.

[Texas_Bob]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

Well, the main logic board was not it. The majority view now is a YSUS combo (includes the 2 driver boards) is the remaining problem. I ordered them from ebay from a seller that said if they don't solve it I can return them. I also get some $$ back for the old, non-working boards, if it does. I'll post the results.

[tom66]

Re: CPTOH-0603, (AKA:PDP50x3R010) Dim screen w/Retrace specs

It's not a Y-sus issue and I doubt it's a buffer problem either.