Philips DPTV305F

[DavGoodlin]

Friend of mine got this a few years back, got some convergence IC kit online and I soldered it in for him. It fixed THAT probem, but the color has been looking worse. I told him I never worked on these but would try so he could go flattie shopping with no regrets.

. Got the pins figured and hooked each color tube up to the CRT tester.
One funny thing is the heater draws so little current that it runs at 8V when the rheo is at minimum.

These CRTs don't quite cut off and all colors show strong emissions despite the green picture looking like a total fuzzy gas-bag CRT.

Tried the clean (AC between cathode and G1) and then said F*** it and hit the REJ, noting a bit of current. No visible changes when we fired it up.

My prognosis, don't bother with these. This set is over 10 years old and was used at a gym, so hours killed it. I always see these at the curb for a few days then the urban urchins destroy them. No loss, just had to find out for m-self.

[daro]

Originally Posted by DavGoodlin

Friend of mine got this a few years back, got some convergence IC kit online and I soldered it in for him. It fixed THAT probem, but the color has been looking worse. I told him I never worked on these but would try so he could go flattie shopping with no regrets.

. Got the pins figured and hooked each color tube up to the CRT tester.
One funny thing is the heater draws so little current that it runs at 8V when the rheo is at minimum.

These CRTs don't quite cut off and all colors show strong emissions despite the green picture looking like a total fuzzy gas-bag CRT.

Tried the clean (AC between cathode and G1) and then said F*** it and hit the REJ, noting a bit of current. No visible changes when we fired it up.

My prognosis, don't bother with these. This set is over 10 years old and was used at a gym, so hours killed it. I always see these at the curb for a few days then the urban urchins destroy them. No loss, just had to find out for m-self.

Sounds like the coolant has gone off & require replacement to fix the problem, This was a quite common problem with the CRT's on those units.

[Jeffhs]

Originally Posted by DavGoodlin

My prognosis, don't bother with these. This set is over 10 years old and was used at a gym, so hours killed it. I always see these at the curb for a few days then the urban urchins destroy them. No loss, just had to find out for m-self.

I agree 100 percent. Projection TVs are out of date these days anyway. I would never have one in my apartment. Flat screens -- LCD, plasma, OLED, etc. -- are the sets to have nowadays. If you want to try to get an old projection set working "just for the heck of it" and don't mind spending a lot of time and money doing it, or if you have one that still works (like miniman82's), OK, but always remember that these sets are and have been out of date for some time. When a projection set goes bad and develops a serious problem, best just to put it out for the trash and get a modern LCD or plasma flat screen.

[jr_tech]

I agree that CRT based projection is history, but a DLP front or rear projector is still about the only economical method of producing a really large picture, like 6 feet diagonal or larger. I use a small inexpensive DLP projector that I can just place on top of the printer in my computer room on rare occasions when I want to watch TV there. Not all projection sets are "out of date".



Large, current production DLP rear projection set:
http://www.amazon.com/Mitsubishi-WD-...eywords=dlp+tv

Current model DLP front projector:
http://www.amazon.com/ViewSonic-PRO8.../ref=pd_cp_e_1

Not affiliated,
jr