CurtPalme.com Home Theater Forum

[km987654]

[DolbySR]

OK then. I'll go and change the EHT board of the BD808s for the one I still have from my old BG800. Either change the wire jumper on the mainboard or simply modify the EHT board itself. Shouldn't be a big deal.
Anyhow, I'll ask Curt, if he has a matching new version of a quad for the BD808s, so I could change it back sometime in the future, so everything will be as it was supposed to be

By the way: Is there a explanation why these cross-usage (new EHT, old quad) is supposed to oscillate? I'm just curious ... if it simply is like that and because Barco said so - no bog deal

[km987654]

[DolbySR]

Of course you can modify the old style EHT board to work on a new chassis. You can also change the jumper wire on the mainboard, but the only thing that will change is change the pins for the MOSFET's drain connection from C27/C28 to C29/C30 or the other way. The other possibility is, to simply change the layout on the old style EHT PCB a little bit so that the MOSFET's drain will no longer be on pin C27/C28 but on C29/C30 instead. Solved with a simple jumper cable and cutting the original connection to pin C27/C28 on the EHT board itself. No need to disassemble half of the projector to access a jumper wire on the mainboard

[km987654]

[DolbySR]

[DolbySR]

Well, did the modifications but now, when the PJ is switched on, after a few seconds, it suddenly starts to sizzle - some hiss, I'd say from the region EHT/Quad.

EDIT: It's the splitter, that makes this sizzling noise ...

Swapped back the original EHT, which worked with the old quad (what so ever) and the same hiss again after some seconds.

I'd say, it would be better to just replace the whole EHT-Quad Combo. Any other thoughts about that?

[Decibel]

I'm trying to follow this discussion but I find it difficult to understand because of language.
Can you describe your problem in Italian?

Sto cercando di seguire questa discussione ma ho difficoltà a capire a causa della lingua.
Puoi descrivere anche in italiano il tuo problema?

[DolbySR]

[Decibel]

Curt wrote some time ago that the splitter R762718 (new series) and R7617447 (old series) are interchangeable, and indeed I have successfully fitted a splitter R762718 on a 808 that has a quad+EHT of old series.
You can swap quads R7622091 and R761743, they are identical except for mechanical support.
For mount R761743 on a 808 you must insert the spacers between it and the chassis.
It seems strange that the quad emits sounds, could be the EHT board.

You must respect the couple eht + quad of the same series.
I never tried to install a EHT of the new series with an old quadruplicator. I think it would not work.

All quads are rare but the new series are almost impossible to find.

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Curt qualche tempo fa scrisse che gli splitter R762718 (nuova serie) e R7617447 (vecchia serie) sono intercambiabili ed effettivamente io ho montato con pieno successo uno splitter R762718 su un 808 con un quad ed eht della vecchia serie.
Puoi scambiare i quadruplicatori R7622091 e R761743, questi sono identici tranne per i supporti meccanici.
Per montare un R761743 su un 808 devi inserire degli spaziatori fra questo e il telaio.
Mi sembra strano che il quadruplicatore emetta suoni, potrebbe essere invece la scheda EHT.

Devi rispettare la coppia eht+quad della stessa serie.
Io non ho mai provato a installare un eht della nuova serie con un vecchio quadruplicatore. Penso che non funzionerebbe.

Tutti i quadruplicatori sono rari ma quelli della nuova serie sono quasi introvabili.

[Curt Palme]

To add to slight misinformation above I believe (I'm correcting it, not adding to the misinformation!):

Any splitter will work in any set, old or new style HV section, it doesn't matter. Forward and backward compatible,

An old style quadrupler will work in a new style set, regardless of EHT board. A new style quad will NOT work with the old style EHT board. It will smoke the board almost always.

You can interchange old and new style EHT boards, but a jumper wire must be added as described above. Again though, if you put an old EHT board into a set with a new quadrupler, it will blow up.

[Curt Palme]

To add to slight misinformation above I believe (I'm correcting it, not adding to the misinformation!):

Any splitter will work in any set, old or new style HV section, it doesn't matter. Forward and backward compatible,

An old style quadrupler will work in a new style set, regardless of EHT board. A new style quad will NOT work with the old style EHT board. It will smoke the board almost always.

You can interchange old and new style EHT boards, but a jumper wire must be added as described above. Again though, if you put an old EHT board into a set with a new quadrupler, it will blow up.

[Decibel]

I read now that you have a frame of the new series. It seems strange because I thought that only the series Graphics had adopted the new frame.
I recently mounted quadruple and eht old series on a new frame but I had to put a jumper as described in the service bulletin that was posted to the previous page.

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Ho letto adesso che tu hai una motherboard della nuova serie. Mi sembra strano perchè credevo che solo per la serie Graphics avessero adottato la nuova motherboard.
Io ho montato tempo fa quadruplicatore e eht vecchia serie su una motherboard nuova ma ho dovuto mettere un ponticello come descritto nel service bulletin che è stato postato alla pagina precedente.

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ref: https://www.curtpalme.com/forum_archived/viewtopic.php@t=14927.html

[DolbySR]

Well ...
Funfact: After having cleaned all connections of HV cables to the splitter and the contacts in the splitter itself, everything is ok again - even with the original new style Quad

Let's see, if its ok now

[Decibel]

[Curt Palme]

You're making it too easy for people here. I like to make them work a bit.

[Curt Palme]

You're making it too easy for people here. I like to make them work a bit.

[Decibel]

[DolbySR]

[DolbySR]

Hi there!

Just found the reason for this squeaking! In absolute darkness, I was able to see a corona discharge through the screw cap of the blue tube HV connection at the splitter (see attached illustrated image). There is a discharge into the air - is there anything to do against it? Insulation with heat shrink tube or so?

[Decibel]

To check if the fault is in the cable, you can try to swap the cable of the blue tube with the cable of another color in to the splitter.
If the arc will move, the issue is on the blue cable.
Otherwise the problem is the connector of the splitter.
Don't move quadrupler cable (labeled "IN")
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Per verificare se il guasto e' sul cavo del tubo blu, puoi provare a scambiare il cavo del blu con quello di un altro colore nello splitter.
Se l'arco si sposta significa che la dispersione e' sul cavo, altrimenti c'è un problema nel connettore dello splitter.
Non muovere il cavo del quadruplicatore (chiamato "IN").

[km987654]