Fujistu-Siemens LCD Color monitor B17-1 strange problem

[dvorav]

Hi guys,

I have recently got Fujistu-Siemens monitor named “LCD Color monitor B17-1”.

Main problem is that when I trun it on, it shows Fujistu-Siemens logo and sometimes after that dimm picture. Power led the truns green, but with no picture. Even if I shine strong light on the screen Im not able to see anything. Maybee Im wront but it seems to me that it is signal board problem. Have you some suggestions what to do? Is it really bad signal ICB? I have opened it, but there weren't badcaps at all (not swollen nor vented). The 5706's were ok. No obvious solder cracks.
Pictures of boards included.

I'm quite hopeless, so I would be glad for any suggestion.

dvorav

[dvorav]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Promissed pictures.

[Leopard]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Hmm - Hermei and Su'scon caps. They can be bad, especially the larger ones near that heatsink. It wouldn't be too surprising if they measured high ESR even though they aren't bulged. I'd replace the 4 caps next to the heatsink, even if they aren't bad now, they will be soon.

[kc8adu]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

change the 4 around the secondary heatsink.
change all the purple hermei on the power board.
esp the 2 close to the inverter.
resolder the ccfl transformers and the 5706/7's
and the 2 blue caps in between.

[dvorav]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Hi to all,
here is conclusion of this case: I have changed almost all caps, with exception of those purple ones near transformators. Surprice! It worked!

Thanks a lot! Your are really pros, guys.

[tombac]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

... "Surprice! It worked!" ...

Yes, at "my" B17-1 out of our companies Dumpster - it works fine...

Thank you too !

CU,Tom

[G.F]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Hello from Austria !

Same here, just fixed two FSC P17-1 showing exactly the same symptoms this thread is about. Thanks a lot for offering such profound information

I actually replaced C922 & C923 with 1000 uF / 25V as well as C924 & C925 with 470 uF / 25V (all were HERMEI ...) and resoldered as adviced. Works like a charme now with just a minor problem left: one screens OSD says 'locked' - which for sure wasn't before. Any ideas on this ???

G.F

[dragon-driver]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Hi
I had the exact same problem with my F.S. B17-1 Monitor and after following [Leopard]'s solution, it now works Perfectly
My screen kept turning off and on, and after inspecting the the power board ([dvorav]'s second image), I found two damaged capacitors near the heat sink (they were bulged).
I chose to replace all 4 capacitors with ones I bought from Maplin (bought the Jamicon variety), though I could
only find ones with a 25V working voltage, like [G.F].

Anyways, just wanted to say Thank You to [Leopard] and everyone who reported his solution was working , which I have now also done.

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

hi friends.
I'm Italian and I apologize if my English if it is not correct.
I have given this monitor that has this kind of problem ... or you accedende but the Fujitsu Siemens logo always returns.
I also change the 4 capacitors hermei?
thanks

[Rtech]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Check Q210,211.212,and 213 as these are the normal cause of problems, as a pair of them normally go short circuit.

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Rtech thank you for the swift response!
tomorrow I'll go buy them!

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

this picture shows the card of my monitor

thanks to all

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

this picture shows the card of my monitor

thanks to all

Hello friends!
and a bit of time that I did not write on this forum.
Finally I got the parts I ordered.
I replaced the four condensers that are in the upper right corner (next to the heatsink) and 4 transistors ... but the image is displayed for a few seconds but then the screen stays black .... what do I do?

thanks to all who help me!

P.S. I apologize if my English is not correct, I am Italian and unfortunately I do not speak good English.

[tom66]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Don't speak good English? Your English is much better than many native speakers here. I can't speak Italian to save my life (I tried learning German in school (compulsory) but gave up.)

What caps did you use to replace the originals? Were they failed?

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

66 Tom, thanks first of the swift response.
the condensers were purchased from a Chinese website.
The transistors instead in a shop in my town ....

thanks again

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Hello friends!
So what do you recommend?

I look forward to your advice, thank you all

[budm]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

One of the tuning caps (blue caps next to the C5706/5707) looks like it is bulging from the side, you should check its value and for any resistance leakage, if it is bad, it will take out the transistors.
http://s807.photobucket.com/albums/y...t=DSCF1714.jpg

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

One of the tuning caps (blue caps next to the C5706/5707) looks like it is bulging from the side, you should check its value and for any resistance leakage, if it is bad, it will take out the transistors.
http://s807.photobucket.com/albums/y...t=DSCF1714.jpg

Budm Thanks for having responded to me.
In fact, tomorrow I'm going to buy the 2 caps guilty of the fault.
Of course I will keep you updated.
As also recommended here ...https://www.badcaps.net/forum/showthread.php?t=10272 and here :http://tv.yoreparo.com/plasma_lcd/mo...s-t754107.html
Thanks again to all

[teppei]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

good morning to all.
My father went to the retail store where until now I bought the parts but this time, there was not.

At the same time I have made the rounds of TV technicians of my country to try to buy these two capacito's, which have this code: 7c184J 250 V, but nothing, no one can understand that capacitor ........ is it possible?

thank you all again

[Rtech]

Re: Fujistu-Siemens LCD Color monitor B17-1 strange problem

Forget the 7c. you need 180nanofarads(184) 5% tolderance(J) at 250Volts.