CurtPalme.com Home Theater Forum

[BigVWman]

I have tried searching here but maybe i'm not using the correct terms to describe my issue so any help is appreciated! I have a 808 retrographics that i have been using reliably for awhile. Several weeks ago i had the unit turn off video. I could power down power back up and image would return for say 15-30 seconds then shut off again. I took off the covers and found the dreaded coolant leaking on the red. I disassemble the unit cleaned any coolant i could find. Disassembled the tube and c element and resealed the rtv and reassembled. Now i get no video at all not even the 15 secs. Occasionally i get a slight red flash but then nothing. All the led status indicators appear normal to me. Any ideas to point me in the right direction short of just starting over and retracing my steps to see if i missed something? I read a few old posts that maybe the unit might sense a short and shut off image but appear status normal but i'm not sure what to be testing for a short! Thanks in advance for any help! I miss the barco- my sony 1270 on a screen doesn't even come close!

[Curt Palme]

I've got one of these as well, awesome sets!

1) If there's a glycol leak, do yourself a favor and take out all of the tubes and bleed them. This is a royal PITA to do, but mandatory if you want a few more years (or decades) out of your set. I destroyed one chassis by not knowing about the glycol leak, ignoring the blue convergence shimmy (caused by the leak) and got rewarded by a BANG and a dead set.. and a 1/2 inch hole burnt into the board that connects the convergence board to the chassis. That's where the glycol drips into, at least on mine.

I check for leaks every 6 months now on the second chassis I got, and stuffed paper towels around the bottom of the tubes so that if a leak starts, the towels will absorb the glycol. So far, 2 years later, dry paper towels.

Anyways, I'll bet the set is going into HV shutdown mode. Check the red lights on the EHT board to see if they come on. If so, chances are you have a bad HV quadrupler. I've got stock.

[Curt Palme]

I've got one of these as well, awesome sets!

1) If there's a glycol leak, do yourself a favor and take out all of the tubes and bleed them. This is a royal PITA to do, but mandatory if you want a few more years (or decades) out of your set. I destroyed one chassis by not knowing about the glycol leak, ignoring the blue convergence shimmy (caused by the leak) and got rewarded by a BANG and a dead set.. and a 1/2 inch hole burnt into the board that connects the convergence board to the chassis. That's where the glycol drips into, at least on mine.

I check for leaks every 6 months now on the second chassis I got, and stuffed paper towels around the bottom of the tubes so that if a leak starts, the towels will absorb the glycol. So far, 2 years later, dry paper towels.

Anyways, I'll bet the set is going into HV shutdown mode. Check the red lights on the EHT board to see if they come on. If so, chances are you have a bad HV quadrupler. I've got stock.

[BigVWman]

Well i be darned i never even noticed that one being up on top like that but after removing the cover you are correct the red HV shutdown led is on. IS there a way to further double check for bad quad- other causes or is that a certainty at this point? Also the filaments DO light up on tubes I would have figured they wouldn't if the Quad itself was bad or are they on but not on enough type thing?