fujitsu pds4222w-s Plasmavision TV

[cadiman]

Re: fujitsu pds4222w-s Plasmavision TV

This is an uphill battle for a first plasma tv troubleshoot. I have one of these in the back room with a broken panel. Since the screen flashes white then shuts down it is most likely in your power supply. The older fujitsus made for sony would do the same thing then flash 6 times ( bad pdp) I never looked any further because the tv was too old and had too many boards inside. A dmm is very cheap these days and alot safer for electronics. Good luck!

[acidophilus]

Re: fujitsu pds4222w-s Plasmavision TV

This is an uphill battle for a first plasma tv troubleshoot. I have one of these in the back room with a broken panel. Since the screen flashes white then shuts down it is most likely in your power supply. The older fujitsus made for sony would do the same thing then flash 6 times ( bad pdp) I never looked any further because the tv was too old and had too many boards inside. A dmm is very cheap these days and alot safer for electronics. Good luck!

Thanks, I actually picked a DMM up that can measure capacitance. I have to replace a fuel filter on my truck then I should be able to get back to the TV. I will update with my progress!

[MANUEL75]

Re: fujitsu pds4222w-s Plasmavision TV

Hey, I have recently aquired a Fujitsu pds4222w-s plasmavision plasma TV that doesnt work. It turns on, and the screen flashes white, and then it shuts off.

I was wondering if anyone has ever worked on these or has any idea how to trouble shoot it. Thanks.

I just got the same tv. My problem is as follows. upon plugging in and the on switch turn on, the red light is on. 5 volts are created immediately for remote, thermo sensor board, and probably anything else that uses the 5 volts. When I turn the on button at the center of the tv panel, the green light momentarily tuns on and I hear a click turning the AC/DC relay on switching the power off. The AC can still be measured coming through the noise suppression coils that shelter the Power supply from noise or interference. The Red light turn on and off until you turn power off on tv.
I have taken some measurements. I though that it was the "thermo-sensor" board. However I checked it by itself and it works fine. It is very simple.

I believe that the relay on the AC/DC board is tripped and comes off thus cutting off AC. There has to be a way to keep the relay energized at least to trouble shoot the cause of the problem(relay being energized or off to prevent AC from coming to the board. I am working on that problem. However, I do not have schematics for that board. Is there anybody there that has a schematic of this AC/DC board? if not do you know a source to obtain this schematics. Fujitsu probably has a workstation to test these board prior to mounting them on the TV assembly line and have the specifications. I doubt that they will provide them to us for any price.
I am an electronics engineer (MSEE) and worked in aircraft electronics far more complex than a TV.

[MANUEL75]

Re: fujitsu pds4222w-s Plasmavision TV

I just got the same tv. My problem is as follows. upon plugging in and the on switch turn on, the red light is on. 5 volts are created immediately for remote, thermo-sensor board, and probably anything else that uses the 5 volts. When I turn the on button at the center of the tv panel, the green light momentarily tuns on and I hear a click turning the AC/DC relay on switching the power off. The AC can still be measured coming through the noise suppression coils that shelter the Power supply from noise or interference. The Red light turn on and off until you turn power off on TV.
I have taken some measurements. I though that it was the "thermo-sensor" board. However I checked it by itself and it works fine. It is very simple.

I believe that the relay on the AC/DC board is tripped and comes off thus cutting off AC. There has to be a way to keep the relay energized at least to trouble shoot the cause of the problem(relay being energized or off to prevent AC from coming to the board). I am working on that problem. However, I do not have schematics for that board. Is there anybody there that has a schematic of this AC/DC board? if not do you know a source to obtain this schematics. Fujitsu probably has a workstation to test these board prior to mounting them on the TV assembly line and have the specifications. I doubt that they will provide them to us for any price.
I am an electronics engineer (MSEE) and worked in aircraft electronics far more complex than a TV.

[MANUEL75]

Re: fujitsu pds4222w-s Plasmavision TV

Hey, I have recently aquired a Fujitsu pds4222w-s plasmavision plasma TV that doesnt work. It turns on, and the screen flashes white, and then it shuts off.

I was wondering if anyone has ever worked on these or has any idea how to trouble shoot it. Thanks.

I have the service manual for the tv. I can email you some of the useful pages to trouble shoot the problem by using the blinking light. My email is calaw@surewest.net. I am an electronics engineer (MSEE)