[Nathan_R]

Hi all,


I'm sorry to bring this up, but could someone point me to an ECP-4100 primer? I've been through both AVS archive sites over the past few weeks, but I'm still having problems finding certain help-points:


1) My red CRT is projecting about four inches wider on both sides than my 60x80 screen. The red and blue guns look fine. I can't find a) anything in English in my service manual to fix this or b) any archived posts on the raster(?) being wider than actual displayed(?) image. How do I fix this?


2) Is there a breakdown on which ECP "pots" are which? My manual is for the 3100 and 4100 series PJ, but unless I missed it, I can't see what a "pot" is actually defined as. After studying previous posts and the board layouts, I'm going to guess the pots are the little white circles in the .5" by .5" squares on the rear boards. Is this correct? If so, is there a master guide for these things?


3) Does anyone have a copy of Mike Newman's past-referenced focus post? I'm looking for all the help I can get. I keep seeing a reference to a Mike Newman and Guy Kudos (or something along those lines) focus FAQ which should guide me in tweaking this thing.


Thanks in advance for helping me sort through this stuff.


Best regards,

 

[Gyvven]

Nathan,


1) is it possible that your red tube's front plate was screwed on too far? the one that the lenses attach to? I mean is the raster the same size as the blue and green on the tube face? if it is than it's a simple mechanical focus issue and having the lense a liitle closer to the raster may cause it to project a larger image. (he said knowingly not knowing of which he spake.)


2) I have a copy of the full service manual, not the user's manual, and would be happy to email you a copy. Although you can get into all kinds of trouble once you start digging into it.


3) I don't have a copy of this saved, but it's easy enough to find. You might have to go to the old archives to find it though.


good luck,


Gyv

 

[Nathan_R]

Gyvven, I sent you a PM. Since then, I found the full service manual on the world wide interweb. Golly-gee, imagine that.


Ok, I have an updated question per my earlier #1 question:


1) I'm shooting the 4100 at a 80x60 screen. My source material (mostly my guilty pleasure-- Boomerang) is 4x3 and fits my screen perfectly. I'm 95% (within an inch or two) sure my throw distance calculation is correct.


With that said, when I hit the hash (#) button to pull up the convergence grid, the grid extends about 4" to the left and right of my screen. I don't really understand why this is happening. My 4x3 material (from a Dish 811) is properly displayed on the screen, but according to this grid, my viewing area is about 8" wider than my physical screen.


Does this ring a bell for anyone?


2) After removing the plastic case and reviewing the full service manual, I understand the pot concept.


3) I found the focus guide after a deep, deep search of the archives.


Can anyone help me with my first question?



Thanks and best regards!

~~Nathan

 

[Clarence]

Nathan-


Can you clarify...

Quote:

1) My red CRT is projecting about four inches wider on both sides than my 60x80 screen. The red and blue guns look fine.

Is your red fine or is it the only color that is too wide?


Any chance you can take a screenshot of the # grid?


If only the red is too wide, and the Blue and Green are fine, then yes... that's odd. Did you try a Full RESET?


But if your concern is that the actual throw distance is wider than the calculation, then that's no big deal... just move the projector a few inches closer.


When you hit SIZE on the remote, what's the value?

Press and v^ to check HSIZE and VSIZE.

 

[Nathan_R]

Wow, that first post of mine is confusing and useless.


Clarence, it's actually all three CRTs that are projecting too wide. I originally thought the side spillage was from the red gun, but the red tint was due to my beige walls to the side of the screen.


When I pull up the convergence grid, all three colors extend a few inches to the left and right. When I use the H size to reduce the sides to fit only onto the 60x80 screen, my satellite feed is merely squished inward a few inches with black bars-- making everyone tall and skinny. I'm using the 4x3 #2 setting on the Dish 811, so I'm pretty sure that's not the problem.


I did the "red button" (not the remote's button) reset on the back of the unit, and even after playing with the size controls, something's still wrong.


I'll see if my archaic digital camera can capture the problem. I'll also fire up the PJ in a bit and note the actual H and V sizes.


Thanks again for the input!

~~Nathan

 

[Clarence]

Quote:

I did the "red button" (not the remote's button) reset on the back of the unit, and even after playing with the size controls, something's still wrong.

You need to press both RESETS (remote and PJ).

Quote:

it's actually all three CRTs that are projecting too wide

Good. That's easy... just move the projector a few inches closer to the screen. The throw calculators are only good enough for rough planning... maybe plus or minus a foot or so. Do not reduce your size using the HSIZE and VSIZE settings; that would reduce brightness by using less phosphor and will result in a small wear area, meaning you couldn't use the rest of the outside phosphor in the future without seeing the inside wear.


Keep the raster maxed within any current wear on the phosphor. Then just slide your projector until the width fills the screen.


You can use VSIZE to adjust aspect ratio if needed... bring up a circle in Avia (or on your PC)... measure and adjust VSIZE until the circle is same height and width.

 

[techman707]

If I understand you correctly, it's ONLY your test patterns that are a little larger than you actual video, is that correct?


If that's the case, it's normal, depending on the source and "porch" sizes on your video source. I pointed this out in a thread a while back. The only problem that can "sometimes occur is that if you have maximized your raster size with the external video and the test pattern goes into the tube face, sometimes the projector might shut down on safety, but it can be turned virtually right back on again.

 

[Nathan_R]

Quote:

If I understand you correctly, it's ONLY your test patterns that are a little larger than you actual video, is that correct?

That's absolutely correct!


So I shouldn't worry about the convergence grid being larger than my physical screen?


Thanks!

~~Nathan

 

[Chris_Holmes]

No, don't worry about it too much. Mine also extends beyond the width of the screen. Just make sure that you don't leave the grid up for extended periods if it looks like it wraps around the edge of the phosphor.