How old is your set? Did it always do this? I think it might be the age of the tv, if it's a 4:3 set I'm assuming its old. And no my Mits doesn't have this problem, but I've had it for less then a year and calibrated.
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Is convergence so large a problem on ALL RPCRTs
I have a Toshiba 50H72. It's a 4:3 set that offers a 16:9 mode which uses all the scan lines in that confined area so HD and DVD look great. I love the set when everything is set up right, and HD looks better than a lot of TV's I've seen. In fact, I like RP CRT sets in general. Except for the God forsaken convergence. It seems like it starts to drift every few hours. It is compounded by the fact that a perfect convergence in one mode (say, 4:3) means the other mode (16:9) is out of whack. So I CONSTANTLY need to do a convergence. The menu offers only a 9 pt convergence, but even after a good service menu job, it drifts fast.
So, my question is -- are ALL CRT sets as susceptible to this? Or do a lot of you find that one convergence means the TV looks good for a while, or until you move it. I'm very strongly considering getting a DLP just because I can't stand doing the convergence constanly -- I prefer the CRT look.
Thanks for any info
So, my question is -- are ALL CRT sets as susceptible to this? Or do a lot of you find that one convergence means the TV looks good for a while, or until you move it. I'm very strongly considering getting a DLP just because I can't stand doing the convergence constanly -- I prefer the CRT look.
Thanks for any info
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my Panasonic is 8 years old and the convergence never drifts. i have the picture touched up every 2 or 3 years.
Convergence has been a disadvantage of (CRT) RPTV in its early days. Somehow one percent accuracy has stood out in my mind, that is an error of up to five SDTV scan lines.
The way technology has improved was to go to microprocessor controlled 100 point convergence with multiple memories for 4:3 mode, 16:9 mode, etc.
Frequent convergence drift can be due to changing line voltage or aging components. Either means you should consider a new TV.
Video hints:
http://members.aol.com/ajaynejr/video.htm
The way technology has improved was to go to microprocessor controlled 100 point convergence with multiple memories for 4:3 mode, 16:9 mode, etc.
Frequent convergence drift can be due to changing line voltage or aging components. Either means you should consider a new TV.
Video hints:
http://members.aol.com/ajaynejr/video.htm
Does your Toshiba have a touch focus button like the newer ones? If so you can probably save your service menu convergence settings to the touch focus button, after a few tries it gets things just about perfect. Mine is good enough that I only check the convergence once a month tops now and even then there's almost nothing that needs to be touched up, and if so touch focus will fix it (although since I'm in the service menu to see the grids I might as well just change it there).
Yes.
A friend has a one year old Hitachi and after I did a full convergence, every time I come back I see something different.
Drift and ageing are the problems. I thought they would of had a better handle on it by now.
I'll stick with a Microdisplay and bulb replacement.
A friend has a one year old Hitachi and after I did a full convergence, every time I come back I see something different.
Drift and ageing are the problems. I thought they would of had a better handle on it by now.
I'll stick with a Microdisplay and bulb replacement.
Convergence on my Philips 60PP9601 is not great but it's ok. I can never get the corners converged perfectly but the raster squeezed HD are is fine. Drift is minimal. This set has different convergence memories for each of the 6 display modes. I'd be surpised if you set didn't as well.
Mark
Mark
I had a '99 model 53" Hitachi SD set and have had a 57" widescreen Sony HD-ready model for over 4 years, neither had any convergence drift whatsoever.
I'm sure you just didn't notice it. Tubes take time to warm up and they do age more so than solid state components. They will drift over time and over the few hours the set is on. You just didn't notice it. Most don't. That's why you have to wait to do a convergence especially on a tube set because of this. I always wait around an hour.
That's the way it was with my Mits one piece FPTV and the Hitachi RPTV and others that I have seen and aligned. 4x3 and 16x9. Even the Micropdisplays tell you to wait at least 10 minutes for the warmup period.
That's the way it was with my Mits one piece FPTV and the Hitachi RPTV and others that I have seen and aligned. 4x3 and 16x9. Even the Micropdisplays tell you to wait at least 10 minutes for the warmup period.
Well, the TV is only about 2 years old, it was one of the last of the 4:3 TV's left (I watch a LOT of regular TV -- I have 4 Tivo's). I guess its just the nature of switchimg modes, cause if its converged in 4:3, its not in 16:9, not matter what. Generally, the red is about 4-5 lines off to the right after the switch, so its just a matter of moving it left and right each time. It's just a pain. That's not to mention the HORRIBLE geometry problems in the upper left and lower left. I just need a new TV. Damnit. Now I have to decide between LCD RP and DLP RP. Son of a....
Where is the D-ILA in the list?
I like LCoS in general, but with the seeming exception of JVC's D-ILA, its a bit high in price. But I've also not been entirely impressed with the JVC's for the price premium. Also, doesn't it have to be converged, thereby bringing my initial problem full circle?
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The 52" 720 D-ILA can be had around 2k. What premium??
| But I've also not been entirely impressed with the JVC's for the price premium. |
Not all drift that bad, that is for sure.....
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I was thinking more of the price premium for most others LCoS. I haven't been impressed with HD-ILA. Yeah, I realize my post was poorly written. Sorry.
| Originally Posted by videobruce The 52" 720 D-ILA can be had around 2k. What premium?? |
The convergence on my Toshiba 46H83 barely drifts at all, but when I notice something is off, a press of the Touch Focus button brings it back in line. I've done a service-level geometry and convergence adjustment, and saved that to Touch Focus, so that is certainly a big reason for this.
Your TV has seperate convergence memory for each of 4:3, 16:9 with the grey bars, and 16:9 compression modes. Adjusting one mode absolutely should not affect the other two. Are you sure you're waiting for the TV to warm up fully (at least an hour) before you make any adjustments? Otherwise, you may have a technical problem there.
Your TV has seperate convergence memory for each of 4:3, 16:9 with the grey bars, and 16:9 compression modes. Adjusting one mode absolutely should not affect the other two. Are you sure you're waiting for the TV to warm up fully (at least an hour) before you make any adjustments? Otherwise, you may have a technical problem there.
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Oh, I'm pretty sure I have technical prooblems all over the place. When I first got the set, it died after about 4 months. Had a toshiba guy come out, had to fix the main board, and it worked. While he was at it, i told him about the geometry problems (not entirely sure that's the right term there -- but basically in the upper left, in the service convergenence screen the red lines make a nice little curve instead of a straight line, and in the lower left teh blue does the same thing) and he did his best to fix it in the service menu to no avail. This isn't a problem in 16:9 mode as it is only the very upper and lower corners, but man is it annoying in 4:3.
I do let it warm up -- but it sorta seems like nothing gets saved. I don't have a touch focus, but is there something specific I have to do in the service menu convergence to save it? Am I just resetting it every time I turn off the set?
| Originally Posted by JohnnyG Otherwise, you may have a technical problem there. |
I do let it warm up -- but it sorta seems like nothing gets saved. I don't have a touch focus, but is there something specific I have to do in the service menu convergence to save it? Am I just resetting it every time I turn off the set?
On my set, Philips 60PP9601, you have to know a 'trick' to get save service mode changes. I forget exactly what it is but it's something like setting a register '000' before leaving the service menu.
Mark
Mark
Once I got my set converged throught the service menu, my touch focus will now go back the same position it was set in the service menu.
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This is actually normal. It's due to the angles of the CRTs and the curve of the lens. This happens on all brands, but some other brands have convergence points off the screen which really help to compensate for this. Also, if the left-most and right-most vertical lines in the service convergence system are too far to the center of the screen, it'll make this worse. But then if you move them outwards, you'll increase your overscan and clip more of the image.
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You have to press '7' to save your work, which should return you to the service parameter you were last on (if not, press 7 a second time). If you turn the TV off without pressing '7', you will lose your work.
| Originally Posted by wildside50 ...but basically in the upper left, in the service convergenence screen the red lines make a nice little curve instead of a straight line, and in the lower left teh blue does the same thing) |
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| ...but is there something specific I have to do in the service menu convergence to save it? Am I just resetting it every time I turn off the set? |
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