CurtPalme.com Home Theater Forum

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

snkby · Joined: 12 May 2007 Posts: 134

i think it was just a latenight typo on my part.

ive always understood the p14 mod to be on the lvps.

is that what youre concerned about ?

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

snkby · Joined: 12 May 2007 Posts: 134

so ive completed the p14 mod but im still unsure of where i measure the voltage so i can trim it.

thanks.

snkby · Joined: 12 May 2007 Posts: 134

i think i might have a problem............the only trimpots they had in the 20ohm value have the trim on the top of the package.

im thinking i need to have the trim on the side so its accessible from the side of the grill when its in the pj right ?

and the 8110 lvps -did- have the -grey mexico- trimpot.

im also thinking that i should measure the existing p14 voltage on the 8110 to help troubleshoot it because the blue tube seems to light-up brighter than then red or green.

thanks.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

It doesnt matter as i kept removing and adjusting the trimpot, you measure the P14 in side the back of the PJ near the Blue Tubes neck card, if standing behind the PJ wiht the top off and the back heat sing swung down, to the right of the blue tubes neck card you will see a couple connectors on the bottom(mother board). You will see it marked P14. measure between the two pins or pull the connector and measure the plug.

Athanasios

snkby · Joined: 12 May 2007 Posts: 134

when i check the p14 voltage is the pj supposed to be -on- or just in -standby- ?

if i remember right.........when its in -standby- there -is- voltage at p14 in anticipation of the pj being turned -on-.

i remember that the reason i am supposed to have the pj in -standby- for at least 10min prior to -on- is for the filaments to get properly warmed.

if i have enough time today im going to swap tubes and do the colored glycol while they are out.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

check it while its on, i dont wait for a warm up but it usually is about the same. Do yuo have a syringe and thin tube to draw the glycol out? its a slow process.

Athanasios

snkby · Joined: 12 May 2007 Posts: 134

could this be -good- news ?

i put the un-modded original lvps back into the 8110 and measured p14 @4.06v in standby and an ominous 6.66v with the pj -on-.

im thinking this is good because .31v couldnt possibly be enough extra voltage to ruin the tubes or could it ?

i got my dip and plcc extractors friday and will start pulling an cleaning chips today.

thanks for all the guys ! Smile

im stoked to know that the 8110 is so much better than the 8000 especially considering i paid only $200 for it but of course the green is toast and the red does show some wear.

snkby · Joined: 12 May 2007 Posts: 134

a nurse friend of ours gave me a huge syringe and longass thick needle to do the change but i cant find them now!

might have to ask her for another set.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

6.66 is still to high they say 6.4 is the max it should be.

Athanasios

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

snkby · Joined: 12 May 2007 Posts: 134

well..........the lvps i modded was from another 8000 and not the one i use.

why do you say i now have 2 -bad- lvps ?

just because the trim is on top and not the side ?

nashou66 said it doesnt matter where the trim is located.

i think the side-mount trim wold be ideal but once its set it shouldnt need to be tweaked again right ?

and i can always remove the new trimpot and resistor and fix the trace if i really really need to put it back to original.

i just rechecked the tubes on the 8110 and its the green and blue that show a lot of wear and the red shows no wear.

could the red actually be a usable tube ?

---at 6.6 volts the cathode temperature is about double what it should be which is why your tubes are dead, the cathodes have been stripped.---

the tubes do light-up but have that noise and the diagonal scrolling line happening.

could they light and show noise but still be -dead- ?

im going to hook-up my laptop and see what happens.

snkby · Joined: 12 May 2007 Posts: 134

hooked-up my laptop and didnt see any change in the tubes except the scrolling diagonal lines stopped scrolling.

pushed a few menu buttons but didnt see anything either.

dont know if i will get to do everything i wanted to do today as my wife might need me to take over her duties later today with the kids as shes feeling a little exhausted.

going to pull the clm right now and clean all those chips as i know i can do at least that today.

snkby · Joined: 12 May 2007 Posts: 134

so i pulled and cleaned all the chips except for a couple of the vey smallest chips that the puller just couldnt grab.

powered the pj on and set p14 to 6.35v.

still had the same stuff on the tubes but i was able to get the raster down to fit within the tube face as it was overshooting the edges a bit before.

if the tubes are -dead- then why do they light-up and show noise ?

the remote seems to function as i can control various things but i still see no menu.

so am i at the point where i need to swap tubes to see if the pj is ready for them ?

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

I re read the entire post and realized you never tried the other Vim.

1) which PJ are we talking about now that has no menu the 8110, or the 8000?

2) Getitng back tot he Original banding on the 8000 have you tried the Vim from the 8110 in it? If not try it and see if the banding as you call it is there.

3) If there is no menu on the 8110 then its something on the CLM as it generates the Internal menu and patterns, try the 8000 CLM in the 8110 it might not work at all as they are very different but it might work long enough to test if the menu comes up on the 8110 with the CLM from the 800 that you say has a visible menu.

Report back.

Athanasios

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

snkby · Joined: 12 May 2007 Posts: 134

nashou66 :

1) the 8110 has no menu

2) i have not tried the vim from the 8110 in the 8000

3) i will swap the clm from the 8000 into the 8110 and see what happens.

draganm :

i agree the trim on top is not the best as i have to pull the lvps to adjust it.

i will check that u16 chip for orientation.

will probably have to wait for a few days to get to it as i have some long work days starting tomorrow.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Try the Vim from the 8110 in the 8000 i have a 2006-03p vim (8000) that kind of does what yours is doing , it takes a few minutes to heat up and cause a problem.

Nashou

snkby · Joined: 12 May 2007 Posts: 134

the reason i dont think its the vim on the 8000 causing the problems with hd is because it also happens with the secondary vim.

either 01/02 are fine with the htpc signal but neither are ok with the hd signal.

and when i tried the vga htpc through the transcoder and then into the hd video chain the htpc image was stable but dark compared to going straight into the 01 vim via vga->rgbhv.

but i will try it anyway.