CurtPalme.com Home Theater Forum

[darkNiGHTS]

Hi all, new here. I recently picked up a Sony VPH-1272Q on Craigslist and it's a bit rougher condition than described. Debating whether or not to keep it. I was able to center the red fine, but the horizontal adjustment on the blue is not working. Here's a video of the issue. As you can see, vertical adjustment works fine.

https://www.youtube.com/watch?v=IFf62HpB4tg

I just want to confirm this means it's unusable before contacting the seller. I have been researching these a bit but it's all a bit dizzying. I'm not missing anything, am I? There is pine needles inside, it was clearly left outside... but for $60 if I can get it working decently it will satisfy my need for a CRT projector because they are hard to come across these days for a decent price.

Thanks for your time.

[kal]

Hi and welcome to the forum!

If all 3 tubes light up and show a picture, the projector is likely fine.

You need to do mechanical centering (physically move the tubes) as best you can before you use the electronic adjustment. Get the center points perfect. Then use the electronic to find tune. I bet you're trying to do everything through the electronic menus without physically adjusting the tube toe-in/angle first which is not the way it's supposed to be set up. You will be limited how far you can move the image (as you're seeing). It's also harder on the electronics and will cause more convergence drift if you use electronic adjusment too much to adjust for a poor mechanical setup. Get the mechanical setup as perfect as you can then use electronic to make fine tune adjustments to get it perfect.

This mechanical needs to be done with any CRT projector setup whenever a new distance/screensize/etc is used. It's part of the normal setup procedure of any CRT projector.

If you're just playing around in the garage to see that things work and getting used to how to set it up that's fine, but assume you'll need to redo it all from scratch when you go to place the projector where it's eventually going to live.

The first setup is the hardest if you've never done one before as you need to wrap your head around all this.

For a first time user I would suggest following the install manual. Available here: http://www.curtpalme.com/Sony125x_Downloads.shtm

Good luck!

Kal

[kal]

Hi and welcome to the forum!

If all 3 tubes light up and show a picture, the projector is likely fine.

You need to do mechanical centering (physically move the tubes) as best you can before you use the electronic adjustment. Get the center points perfect. Then use the electronic to find tune. I bet you're trying to do everything through the electronic menus without physically adjusting the tube toe-in/angle first which is not the way it's supposed to be set up. You will be limited how far you can move the image (as you're seeing). It's also harder on the electronics and will cause more convergence drift if you use electronic adjusment too much to adjust for a poor mechanical setup. Get the mechanical setup as perfect as you can then use electronic to make fine tune adjustments to get it perfect.

This mechanical needs to be done with any CRT projector setup whenever a new distance/screensize/etc is used. It's part of the normal setup procedure of any CRT projector.

If you're just playing around in the garage to see that things work and getting used to how to set it up that's fine, but assume you'll need to redo it all from scratch when you go to place the projector where it's eventually going to live.

The first setup is the hardest if you've never done one before as you need to wrap your head around all this.

For a first time user I would suggest following the install manual. Available here: http://www.curtpalme.com/Sony125x_Downloads.shtm

Good luck!

Kal

[darkNiGHTS]

Thanks for the welcome!

Yes - I am just testing it in the garage to make sure it's all working, I'm not doing any fine tuning, just checking it all out.

I was looking through that install manual. I actually didn't see anything about centering the lens, either physically or digitally except on page 49, in the remote diagram it shows the description of the Cent R/B keys. Just looked through again. Sorry if I'm missing something!

It's not even moving a tiny bit with electronic adjustment though, you don't think that will be an issue? With Hf min and max the picture is identical. On the red tube, both horizontal and vertical, and on the blue vertical, it moves a decent amount.

How do I physically adjust the tubes? Do I have to take off more of the cover than the panel that lets you play with focus?

EDIT: I see "The 'Mooneyass' Sony 1270Q Setup and Operation Manual", should be pretty similar to mine? He touches on physically adjusting the tubes.

[kal]

Sorry, I've never owned a Sony so I can't point you to how exactly to do the lens toe-in on such a unit but mechnically aiming the lenses is definitely the first step. Some projectors cheaped out and used different sized shims to do this. I took at quick peek at the manual and near the start (page 5) it does talk about what shim size to use based on your screen size. I suggest you go through the install manual step by step.

You're right that moving the horizontal position electronically should make the image move (the vertical seems to work based on your video). I'm not sure if what you're seeing is normal. Could be blown deflection circuitry? Could be that the previous install pegged a setting? Not sure I'm afraid. Someone who's used one of these can hopefully chim in.

Normally you'd start by resetting all electronic values to midpoints and do the mech setup, then the electronic.

Kal

[kal]

Sorry, I've never owned a Sony so I can't point you to how exactly to do the lens toe-in on such a unit but mechnically aiming the lenses is definitely the first step. Some projectors cheaped out and used different sized shims to do this. I took at quick peek at the manual and near the start (page 5) it does talk about what shim size to use based on your screen size. I suggest you go through the install manual step by step.

You're right that moving the horizontal position electronically should make the image move (the vertical seems to work based on your video). I'm not sure if what you're seeing is normal. Could be blown deflection circuitry? Could be that the previous install pegged a setting? Not sure I'm afraid. Someone who's used one of these can hopefully chim in.

Normally you'd start by resetting all electronic values to midpoints and do the mech setup, then the electronic.

Kal

[AnalogRocks]

Sounds like a possible horizontal board issue

[AnalogRocks]

Sounds like a possible horizontal board issue

[HaydnG90]

Looks like a nice pj for $60. From the video my guess is the blue toe-in needs adjusting.

[Curt Palme]

No issue, it's a user error.

Set the H and V shift for the red and blue tubes back into the middle, then go into the 'zone' convergence menu. Zone 1 is the coarse H and V shift for whatever color you pick. That's how you set the H shift for the blue tube, but also check red and green to make sure they are centered on the face of each tube. A slight offset for red and blue are normal, to align it over top of the green image.

[Curt Palme]

No issue, it's a user error.

Set the H and V shift for the red and blue tubes back into the middle, then go into the 'zone' convergence menu. Zone 1 is the coarse H and V shift for whatever color you pick. That's how you set the H shift for the blue tube, but also check red and green to make sure they are centered on the face of each tube. A slight offset for red and blue are normal, to align it over top of the green image.