Panasonic tc-p55gt30

[Malachi]

Re: Panasonic tc-p55gt30

Both of the sc boards arrive today. An special instructions? Or based on earlier results, should I just put them in and turn the tv's on?

[Malachi]

Re: Panasonic tc-p55gt30

I installed the sc board. Hooked everything up. No blinking led. The tv powers on, led solid red but nothing really on the screen except for black and a darker black horizontal bar.
Not sure if it can be seen in the pictures. The picture is rotated 90 degrees.

Maybe the 2 buffer boards are bad?

[Malachi]

Re: Panasonic tc-p55gt30

Just tried the sc board in the other TV, 7 blinks.

[Malachi]

Re: Panasonic tc-p55gt30

What are these black components is this picture?
When I test these with my meter in diode mode, the ones they replaced don't beep but some of the others do.

[Moreno83]

Re: Panasonic tc-p55gt30

Don't put these boards in other tv's that are already "bad". It can kill the new repaired boards.

The ones that beep probably have "D" in front of it. For example D401.

The black bars are probably badly seated ribbon cables. Look at my thread and check the pictures.
The led has to be green? Try and turn it on with the remote , hold the power button on the remote for a few seconds....

[Malachi]

Re: Panasonic tc-p55gt30

Made some progress with the tc-p55gt30 with the AC board in.
Nothing with the tc-p55vt30. No blinking led.

Here is a picture of the p55gt30.

[Malachi]

Re: Panasonic tc-p55gt30

Maybe a better picture.
The lines seem to correspond to where the ribbons go into the SU and SD boards. I already reseated the ribbons twice. Maybe faulty SD and SU boards on the p55tg30?

Doesn't explain the no picture on the p55vt30. I swapped the SS boards and made no difference.
Does it matter that some of those black components in the picture beep when I check then in diode mode? Some of the same components on both SS boars beep too. Normal?

[Moreno83]

Re: Panasonic tc-p55gt30

Still badly seated ribbon cables!! You need to recheck the ribbon cables on the buffer boards.

The black bars match with a ribbon cable , be gentle with it and apply pressure from the middle.

[Malachi]

Re: Panasonic tc-p55gt30

Apply pressure on it while the TV is on?
What about those black components? What are they called and is it ok that some beep whit m meter on diode mode?

[Moreno83]

Re: Panasonic tc-p55gt30

NO!! Never with tv on. Everything you do do it with the tv off and power plug removed.

The black components on the SC board are IGBT's and diode's. The IGBT's are listed on the board starting with "Q".
The other ones are diodes , they are listed as "D". ( D401 for example )

They work as the tv is displaying a picture! The black bars/lines on the GT model is because the ribbon cable is not lined up perfectly with the board. They need to be reseated.

[Moreno83]

Re: Panasonic tc-p55gt30

tip: Pull the latch as far as you can , remove the ribbon cable and reseat it. Look on both edges , you see there is a small "hook" that has to go into the latch. Try to put it in via the middle section of the ribbon cable...most of the times your hear a "click".

[Malachi]

Re: Panasonic tc-p55gt30

Holy crap. Thanks Moreno. Got it. You were right.
I'm sweating just from reseating ribbons.

[Malachi]

Re: Panasonic tc-p55gt30

Now, why am I not getting anything on the p55vt30 with the same SC board and SS board.
Both tv's take the same part.
Could something else be bad on the p55vt30?

[Moreno83]

Re: Panasonic tc-p55gt30

Your welcome!

Maybe it's best to start a new thread for the other tv. Btw , it's a better picture then the tv you traded it for...right?
Picture setting on "dynamic" and you will see the power of the plasma.....

[Malachi]

Re: Panasonic tc-p55gt30

The picture looks better than on my lg 60pn6500. It's 5" smaller though.
I am missing a rubber stand and screw for one of the fans. Not sure how to go about locating one.

[Moreno83]

Re: Panasonic tc-p55gt30

The 55GT30 and the 55VT30 have a different mainboard i think but the sc/buffer boards might be the same.

You get 7 blinks with exactly the same boards as the GT? ( SC + buffer boards ? )

[Moreno83]

Re: Panasonic tc-p55gt30

Also , if both boards are the same in the GT and VT version but you only replaced the SC board then you might have bad buffer boards in the VT tv.

https://www.youtube.com/watch?v=51SZsfH60EY

Check the buffer boards in the VT as Tom66 does in the video. If you hear a beep then its short and they need to be replaced.

[Malachi]

Re: Panasonic tc-p55gt30

The main boards are different the rest is the same. I've checked the numbers.
The Tc-p55gt30, works as shown in the pics. No more blinking led.
I take the sc board which originally came out of the tc-p55vt30 which had 7 blinks I think or 8 no cant remember now. I'll have to look at the first or second page of the thread.

The sc board had some shorted parts number 30F131 from the picture a new SC2 was shorted.
I sent it out for repair. When it came back today, I put it in the p55vt30, no more error led blinking but also no video, osd, nothing.
Put the SC board in the p55gt30 and it worked, except for the lines on the screen which you helped me resolve.
Took the SC board out of the working p55gt30, put it in the p55vt30 and nothing.
The green LEDs light on both on the sc and SS board but no picture.

[Moreno83]

Re: Panasonic tc-p55gt30

Can you post pictures of the back of the VT30 as it is right now?

[Malachi]

Re: Panasonic tc-p55gt30

Here is a picture of the front. Top of the screen lighter than the bottom. Could be the buffers although following toms video I got no beeps.