[M9500LC]

Hi,


basically i just wanted to know if i leave my projector, switched off, with the plug still in the wall mains (ie the LVPS fans are still working). Will these cause wearing out of the tubes' emission guns???

 

[MadMrH]

Check with the Marquee experts but YES I think is does on a MARQUEE.............


BARCOs DONT.

 

[M9500LC]

thanks madh...


any marquee owners??? pls chime in...

 

[nashou66]

This question was asked before and i thought it was said that no wear occurs. i hope this is true since i leave mine pluged in. But i have not seen any waer at all on my tubes.


Athansios

 

[RalphArch]

I don't think there was consensus but it appeared most thought not a problem or most would have seen it. Thread here


I leave mine on for the most part but I did buy a remote appliance switch that I will use on occasion. More for the fan noise than to worry about the low filiment voltage

 

[Tim in Phoenix]

Hello


In that mode there is four volts supplied to the filaments, which goes to 6.3 volts when fully on, less jolt to the filaments that way and I do not see a wear issue.

 

[M9500LC]



Quote:
Originally Posted by Tim in Phoenix /forum/post/0


Hello


In that mode there is four volts supplied to the filaments, which goes to 6.3 volts when fully on, less jolt to the filaments that way and I do not see a wear issue.

Hi TIm, you said that "In that mode there is four volts..."


Can I clarify whether "that mode" is it:


1. The projector is switched on, but the standby button is activated, thus cutting off the image


or


2. The projector is switched off but the plug is still in the electrical mains, with a little bit of electricity running to the LVPS.

 

[Tim in Phoenix]



Quote:
Originally Posted by M9500LC /forum/post/0


Hi TIm, you said that "In that mode there is four volts..."


Can I clarify whether "that mode" is it:


1. The projector is switched on, but the standby button is activated, thus cutting off the image


or


2. The projector is switched off but the plug is still in the electrical mains, with a little bit of electricity running to the LVPS.

Hello


1) Is full filament at 6.3 volts for instant resumption


2) Is 3.9 to 4.0 volts, going to 6.3 vdc when switched on.

 

[M9500LC]



Quote:
Originally Posted by Tim in Phoenix /forum/post/0


Hello


1) Is full filament at 6.3 volts for instant resumption


2) Is 3.9 to 4.0 volts, going to 6.3 vdc when switched on.

hi tim, so will there be any wear on the emission gun if there is a prolong duration of 3.9 to 4.0 volts on the filaments?


I'm asking this is because I do feel that my light output when I use the PS3 to play Blur ray to be rather dim. However this is not the case when I use my Oppo. So I'm wondering whether is it because the PS3's as a source has low amplitude whereas my Oppo is sending out a signal with higher amplitude. (DO take note that I've followed your website to adjust my G2 values and the values are very healthy as stated in your link, in fact their values matches that of new tubes)

 

[Chuchuf]

I have never understood Marquee's reasoning for this. Honestly I believe it is a carry over from the "early" days of direct view CRT's when the manufacturer's would leave some filiment voltage on while the set is turned off.

I would argue that it is NOT a good thing to have this 4V present on the filiments if the set is left unused for any length of time. If you are going to watch your set every day, then perhaps leave it plugged it, if it is off a few days and used once or twice a week, then I would unplug the unit between sessions.

And here is the real gest of the matter. Why is it that all the other major manufacturers of CRT's don't use this method of keeping the filiments warm. If there was an issue with shock, then wouldn't we have seen this with other sets like Barco, Sony NEC etc. I have seen a lot of different stuff go wrong with tubes but can only think of two instances where the filiments had gone out, and that was on very early VDC rebuilds before they got their process correct years ago.

So I guess he real question is, are he other manufacturers ramping their filiment foltage up slowly when the unit is turned on? and the Marquee isn't? I don't know, but don't think so.

The Marquee doesn't come on any faster than any other set when turned on so there isn't an advantage there??

So why are they doing this?


Terry

 

[psilvest]



Quote:
Originally Posted by Tim in Phoenix /forum/post/0


Hello


1) Is full filament at 6.3 volts for instant resumption


2) Is 3.9 to 4.0 volts, going to 6.3 vdc when switched on.

These voltages are ensured only if the LVPS has been modded (trimpot replaced). Is there a risk that a pj that is used very little but is unmodded could incur emission reduction if left plugged in over long periods?


Pier

 

[M9500LC]



Quote:
Originally Posted by psilvest /forum/post/0


These voltages are ensured only if the LVPS has been modded (trimpot replaced). Is there a risk that a pj that is used very little but is unmodded could incur emission reduction if left plugged in over long periods?


Pier

yes that's a question that's bugging me too.

 

[Curt Palme]

I don't think so. I watch my own set less than 200 hours a year, and 1/2 those hours are spent demoing the projector/HT room to customers. I've had the set plugged in now for about a year, and there have been no issues.


If your PS3 light output is lower than the Oppo, I'm sure the output signal level of the PS3 is measurably lower than the Oppo. You can use a test DVD like the AVIA to prove this, or measure the output of each device with a scope.