CurtPalme.com Home Theater Forum

Hooty · Joined: 27 Oct 2009 Posts: 16

I have 2 projectors of the same model. One has been heavily used and shows it (hereafter referred to as DIRTY). The other shows little wear (hereafter referred to as CLEAN). CLEAN has nice bright green and red tubes, but the blue tube is just a bit dimmer. DIRTY has a nice bright blue tube, but red and green seem to have some kind of mold growing between the tube and the glass cover. I started using CLEAN but after setting up the RGBHV input I found that the Composite/s-video inputs do not function. DIRTY's board works fine. I swapped them out but this did not solve the issue. I decided that the easiest thing to do would be swap out the red and green tubes from CLEAN and put them in DIRTY.

It took a while since this was my first tube swap, but I finally managed to get the tubes in DIRTY. I plug it in and fire it up. Red an blue work find but all I see on Green is a vertical line. I immediately shut it down and disconnect the power. I must not have been fast enough because it appears that all of the phosphor has burned off where the vertical line was.

It turns out that I had the plug for the Horizontal misaligned. I corrected this and fired it back up. There is now a vertical line on the screen. I'm gonna have to try to clean the green tube from DIRTY and use it if possible.

**Curt Palme** · Posted: Tue Jan 12, 2010 6:52 pm Post subject:

What set is that? very few actuallly allow you to fire up the machine with the yoke disconnected.

Ile · Posted: Tue Jan 12, 2010 7:00 pm Post subject:

Check this out.
http://www.curtpalme.com/CLR_Defungus_Sony_Tubes.shtm
Use fresh glycol to fill it after defungus.

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

Hooty · Joined: 27 Oct 2009 Posts: 16

Hooty · Joined: 27 Oct 2009 Posts: 16

Am I correct in assuming that the glycol is not tinted?

LOTREE · Posted: Tue Jan 12, 2010 9:38 pm Post subject:

I feel your pain. I bought 2 ECP 4500's in 2005, both mint, tubes either replaced or very low hours. I thought i turned the G2 control down on pure white blue tube as the image looked more blue than it should be. The tube did look dimmer and the picture looked good. Went back out into the kitchen only to hear a minute later a pop then smell of electronics. Turns out I had it turned up near max and cracked the tube face with glycol leaking inside . I could have cried but luckily I was able to swap projectors and back in business. The only issue with this unit is that the red tube has a slight haze of fungus in the center which causes a red fuzzy cast on the screen. Sad

**Curt Palme** · Posted: Tue Jan 12, 2010 10:52 pm Post subject:

Go blame Jim Burns on avs. He takes all the credit for the PRO 900 design.

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

I once put a nice spot burn in an absolutely pristine green Panasonic P16L-something (8" Barco pinout high res tube) because I was
inexperienced and panicked when I saw the tube go to full blast green, in a Marquee chassis I'd just put it in. I didn't know it had a
different G2 pinout and didn't know to pull the P14 heater filament plug as a way to safely shut it down.

It is a mistake I have never repeated. Yet.

These things happen. It's a lesson you WILL NOT forget.

CJ

**Curt Palme** · Posted: Wed Jan 13, 2010 3:28 am Post subject:

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

**Curt Palme** · Posted: Wed Jan 13, 2010 3:11 pm Post subject:

Yup, that about sums it up! Smile

deronmoped · Joined: 03 Nov 2006 Posts: 1154 Location: San Diego

I could never cure myself of working on things "hot". I still do it to this very day, although I burn less things up now.

The electricity is flowing through my veins. Shocked

Deron.

roland@b4 · Joined: 07 Jul 2009 Posts: 82 Location: Reading UK

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

**AnalogRocks** · Posted: Fri Jan 15, 2010 2:08 am Post subject: