Pioneer lx6090 2 x flashing red light at start up

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Yes he have refunded me so i could take the chance to try to repair, i go order a new one tomorrow. I will update once it arrived and placed into the tv.

[ReeceyBurger123]

Re: Pioneer lx6090 2 x flashing red light at start up

Hmm ask him to send another as its faulty. The buffers will likely be ok as the way Pioneer set the panel up the buffers wont get hit with the shorted load.

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Here an update,
I have solder today all the faulty IC from the new board and changed with them from my board as they where still ok but still the same problem, now the Vsus came up up to around 7VDC. If i disconnect the flat cable to the mainboard i think the led flashes 3 times instead of the 2.
Can i check if the buffer board are ok as now all the ic's looks ok

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Did some investigation and checked the IC's from the new board. Almost all of them are shorted (the ones that are fitted against the aluminium cooling blocks), only 2 not so probably the other ydrive is a faulty one. Are the IC parallel on each, so if one is shorted the other measure also faulty, do you need to desolder these to check or can i figure out witch is faulty or could these all faulty as well ?

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Yeah I think that board is bad ask him to swap it. Doubt the buffer is shot if it it not easy to fix as its bonded to the screen.

Ok thx, i will wait for an answer from Tom to get sure, it will not easy to swap as it was order in the US, couldn't find these boards in the EU

[ReeceyBurger123]

Re: Pioneer lx6090 2 x flashing red light at start up

Yeah I think that board is bad ask him to swap it. Doubt the buffer is shot if it it not easy to fix as its bonded to the screen.

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

I just did some mesurements, No Vsus , Vadr is 75VDC
The board i bought was from ebay but the seller has almost 2000 pos fb, so i think it should be ok as it came from a cracked screen.
Is it possible to check if one of the buffer boards is dead ?
I tried some more things, mesure everytime with some connector less connected to the ydrive board.
Got always the same results, only the vsus come back if i disconnect the big white connector, not when i disconnect some the other connectors
on the ydrive board, for me it looks that the yboard is not a good one but i can be wrong

[ReeceyBurger123]

Re: Pioneer lx6090 2 x flashing red light at start up

Hmm have you got Vsus ?

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

hi, here an update. Received today the new ydrive, i changed the hole ydrive but the problem still the same. 2 x red flashing led, is there another thing i can try ?

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Ok i go order new ydrive and keep you updated

[ReeceyBurger123]

Re: Pioneer lx6090 2 x flashing red light at start up

Just replace the Ydrive easier to do mate. Keep us updated

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Hi guys, here an update:
I received the mr1712 chip and replaced but it don't work, now the red light flashing 3 times instead of 2 as before, should i need to replace the hole y drive or could it be another problem with the tv ?
Maybe is it not good soldered than as i mesure now the vsus and VAD
Where on the board i could mesure that the chip was good connected ?

[tom66]

Re: Pioneer lx6090 2 x flashing red light at start up

You don't want a VT50 or VT/ZT60? For the next few years i'll stick with my VT50 unless i can get a ZT60.

They're good too, but I'd take a U50B anyway haha. ZT60 and VT60 are reference level, but hardly any difference between them in dark room.

[Moreno83]

Re: Pioneer lx6090 2 x flashing red light at start up

You don't want a VT50 or VT/ZT60? For the next few years i'll stick with my VT50 unless i can get a ZT60.

[tom66]

Re: Pioneer lx6090 2 x flashing red light at start up

Try eBay! But i would also replace the components that Tom said. Trust me , he knows a lot about Pioneer TV's and if he says these are failing then i would buy these also. I think he still uses his Kuro in the bedroom haha.

Kuro is in the lounge, like it should be. I have a Panasonic U30B in the bedroom which has a very good picture. In fact if I get a U50B or similar 50" or more, I'll likely sell the Kuro and put the U50B in its place. The Kuro needs tweaking again to keep it from maldischarging now, I have got the black level so low but it's aged over the past year.

[tom66]

Re: Pioneer lx6090 2 x flashing red light at start up

Hi guys, here an update.
Took the board with me to work and someone checked the board with more knowledge of electronics experience as me and he find the fault almost immidiatly without measure it.
Could it be this one that is faulty as the 2 right legs are really burned in.
Where can i order some new one ?

Yep, that can fail too. It is the converter IC for the sub supplies (Vscan, Vyprst, Vknofs1,3,4 etc.) Available on eBay
http://www.ebay.co.uk/sch/i.html?_fr...r1712&_sacat=0

[Moreno83]

Re: Pioneer lx6090 2 x flashing red light at start up

Try eBay! But i would also replace the components that Tom said. Trust me , he knows a lot about Pioneer TV's and if he says these are failing then i would buy these also. I think he still uses his Kuro in the bedroom haha.

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Hi guys, here an update.
Took the board with me to work and someone checked the board with more knowledge of electronics experience as me and he find the fault almost immidiatly without measure it.
Could it be this one that is faulty as the 2 right legs are really burned in.
Where can i order some new one ?

[tom66]

Re: Pioneer lx6090 2 x flashing red light at start up

That is not the fault, the outer two legs are shorted on the board by design (they are also internally connected inside the device)

The most likely fault is one of three pairs of transistors. I've highlighted one in this image. These are the SUS_UP and SUS_DN transistors. There are another two pairs, mounted along the side of the board closest to the buffer board.

I do see the board is not terribly expensive:
http://www.ebay.co.uk/itm/Pioneer-AW...-/251437263185

So it may be worth just swapping it out,

[kamei10]

Re: Pioneer lx6090 2 x flashing red light at start up

Here the pictures of the component