mines just buggered

 

I have fujitsu P42HHA30 plasma since 2003, never had any issues. Recently, all of a sudden my screen would turn off and red status light flashes. I have to pull the power cord out of the wall, wait untill it makes ''clicking'' sound, then plug it back in and turn the power back on. It works but overnight, if I try to turn it back on in the morning same thing usually happens. Can anyone please provide me with more info on what's going on and maybe some suggestions what to do. Someone told me there may be a problem with power supply. Any thoughts? Thanks in advance.

 

Could be anything? - but it's a VERY common problem, one possibility is the PDP itself. However, as Fujitsu seem totally unable to supply either parts or even the cost of the parts, we scrapped the one we had for repair.

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i have a pds4209u-b and it will power on and off(green light, red light)but thats it. any thoughts on a solution

 

Throw it away and buy a decent make!.

Fujitsu seem to offer no service at all, and don't deserve to get customers!.

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How serious is it to have to replace a logic board on a plasma tv? Also, my plasma broke down about 10 months in...it has purple and red pixels all over the screen that don't change color, leaving a "spray" of discolored pixels on the screen. Does anyone know what this means?

 

Anything is serious on a Plasma TV, because it's ALWAYS expensive! - your discoloured pixels probably mean the PDP (the Plasma Display Panel) needs replacing?.

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Hi,

I had a PDS4207E-H for repair a few month ago. Problem was Green light for 5s then red light blinking continuously. I managed to repair it by replacing the 4 SK's big mosfet next to the 3 tranformers and the SMA-Z1001 which are on childboards behind the mosfets. Also, I replaced the 2 smaller transistor next to the big mosfets. Plus, I replaced a butnr big resistor next to the upper SMA-Z1001's module.

This solved the problem (I found out that there where no voltages on the two uppers connectors going from the AC/DC power board to the DC/DC power board).

This tv was working ok till a wire glues by fujitsu on the video board came off, broking some pads of a big FDK component...

After that, I've found the same tv set which was also not working (in the mean time, I've sold the old one because I couldn't find a replacement board).

This Tv had the same symptoms so I replaced the SMA-Z1001 and mosfets + resistors. It worked for around one hour but the picture was totally white (only some kind of contrast when picture was very dark). It stopped working after 1 hour and now does not power up again (fan's start spinning for a few milliseconds then stops and after 5s, red light blinking...I've not tested the voltage due to lack of time buit I think my mosfets have gone again...).

Do you know if the white picture problem comes from video board or voltage adjustement ? Does it need voltage adjustments ? I've forgot to telle that the OSD is working fine (colors are OK).

Regards, Jerome

P.S : If someone need more help for the above mentionned power supply repair, just send me a message. Sorry for my english, I'm french...

 

For those who have the same problem,

I've found the solution. First thing to do was reset the VS and Va Voltages causing a to large current peak at start. Then for white screen picture but good OSD, the stupid previous owner of the TV which tried to repair it had removed the 3V regulator which was the reference for Video A/D encoders...

I find this missing component while tracking the video signals on the board (I think now, I almost know the whole main board / components due to this stupid man who removed a component without even replacing it or give it to me...).

Anyway, now the tv is working fine, no more problems with the power board (I(ve adjusted the voltages and put a 3W resistor in place of the burnt resistor).

If someone need some schematics or help, I can do it. Just send a message

 

Dear Viruscrazy,

I was about to trash mine, but I just found this forum and your message.
Boy you are into it, your English is fine, we got the message...

I have the Model: PDS4221W-H, got it from work dead, same condition.
Solid Red light, hit the power button on the pull panel, green light for 3 second, small fans moves for 3 seconds and then red blinking light with a relay click, unplug/re plug the power cord and same thing again.
I unplug and re plug all the connectors, the TV turn on all the fans stays on.
My kids watched a complete movie, nice picture, after that I put the rear cover back, and the TV went to red blinking again.

I am looking at the middle circuit board, fans on my side.

I see only 2 SK's big mosfet (2SK2199) Q1, Q2 and then 3 small one, says
TH2, D21, D14 just behind the small fan.
Same side a bit farther there is another big D14 with 4 legs says (D25X860) close to a small transfer and 2 black relays.
The heat sink joins the other side heat sink that has 2 transformers red & blue, behind these transformers, I see Q 14, Q15, Q16 (K2847) and one
TH1 (67L105), please help me which one I should replace?

1-where is the MA-Z1001 which are on child boards behind the mosfets?
2- Where are the 2 smaller transistor next to the big mosfets?
3-Where is the butnr big resistor next to the upper SMA-Z1001's module?
Looks like mine is different model.

Let me know, I can send you the picture via email.
My email is zahidnet@yahoo.com
I really appreciate your help, kids are not happy now.

Regards,

 

Hi,

Unfortunately, your TV is different than mine. Did you tried disconnect all connectors going to the panel itself (All the power connectors that goes to the panel, if you have a photo, I may find them).

If the TV starts every time (I mean, the fans work for more than 3 seconds) when you have disconnected those connectors, then, try adjusting VS and VA voltages (there should be some potentiometers named "vra" en "vrs".
The fans may stop working after 10 seconds if Fujitsu have implemented a better protection system on their TV (on mine, the tv can stay on for a while even with PDP disconnected...).

If you still have the problem when PDP is disconnected, then problem will be with either power supply board (bad capacitor or protection circuit faulty), main board or loose connection.

Regards, Jerome

 

Hi,

Thank you for your reply, tonight I disconnect/reconnect all 12 small circuit boards in the bottom of the TV, that connects directly to Plasma panel.
Disconnect/connect all the wiring connectors and all the bus connectors from each board.
View all the millions components with magnify glass....
The problem is still there, red blinking light and no picture, actually the each time the fans just runs for a second.
All the potentiometers have been also touched, no luck.
I have to find the bad capacitor now over the weekend.
I found out from work that this plasma panel was hardly used in the meeting room for the last 3 years or so.
Note: Last post check the attachment, there are three pics.

Regards,

sxpcb

 

if anyone is intending on throwing theres out please send me the na18100-300901 igbt or fet, big 32 pin thing with the heat sinks on either side,there is 4 in total, however I have the sevice manual for this model, it's very brief but helps. Mine has the symtom of tuning on for a second and red flashing light. I have traced this to the X-sus board and ultimatley the na18100-300901. I have removed the faulty module and now I can get a piture for about 5 seconds. The power supply doesnt go into protect mode anymore light stays green. But still useless until I can get one of these modules. Did you have any luck in making one lee?

I have posted the service manual but if it didnt work leave your email

Cheers
Justin

 

i got a fujitsu 42' plasma but it has the bnc video female end and it doesn't have rca input is their a way to get it to hook up to my vcr

 

Just a lead - or (probably easier to source) a BNC to RCA (phono) adaptor.

However, composite video gives the lowest quality possible.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk