Hi everyone

I was thinkering with a DIY sync splitter, I was testing it. Didn't works and now, removed the splitter, the RED horizontal lines at the bottom half of the screen cannot be adjusted anymore.

They're like BOW controls are screwed. If I adjust BOW only upper side of the screen moves.

Well, actually even the bottom side of the screen can be adjusted but only to increase the BOW effect. If I turn the control to zero the lines stop responding one a time: first the bottom one, then the second one, then the third one...

I know it is not clear, I will try to put a photo or a video of it.

Now the question is: how DAMN can I done it??? But more important: how can I fix it?

Can the set be operated withoud DD and DE cards for 21 point of convergence? So I could restrict the problem to two boards.

Perhaps I should hard reset the baby but the manual's procedure is not clear. On last point I'm asked to set two switches to ON, but from the previous point they're already on ON position...

Otherwise I can exit and buy a Digital one... :(

Please help, I'm stucked. I reseated all cards with no result.

Video (cell phone!) http://youtube.com/watch?v=IxLXnE9bEss

Thanks for your help. Posted on curtpalme too.

Ciao
Antonio

Factory reset- start over- touch up with ZONE:) Should do the trick perfectly..

Thanks Sony

Do you mean hardware reset? If so, you must help me, because IMHO the procedure on the manual is incorrect. On last point they ask you to flip to ON two dip but they're already on ON since the previous point.

Can you help me on this?

If you refer to set all values to 128, my convergence is not forced anywhere, I think I have just few controls over +/- 20 from 128. Even ZONE does not work in that part of the screen.

THANKS for your time, you're the first one helping!

Ciao
Antonio

If the ZONE seting isnt working in that area, change out(if you have them) the (I believe these are the right letters),DB,DD,and DE boards. These would be the two in between the green and blue tubes, and the one just to the left of the green tube. Try them one at a time to see which is at fault, but they all perform the actual control over specific Zone adjustment.

EDIT: The DC board could also be at fault, try this one first. Although, faults in the DC board from memory cause more drastic problems.

Uhm...

No, I do not have any spares unfortunately. Just a Y board from a 1270, but I was told that it is faulty! :)

I know that DB DD and DE are the one responsible for convergence. How can DC affect it?

Yes, ZONE controls on that part of the screen is not working too.

Can a 1271 work without DD and DE installed?

Thanks

Ciao

Usually the DC will throw the whole screen out of shape.. The others are responsible for direct adjustment. I don't know about running without those boards.. never tried. PM or email Curt directly.. he will have more specific answers than I(at least as to what board- he(since he is in the business) usually won't give component-level advice).

Thanks Sony.
I'm still thinking how can that be happen. I was using a LM1881 to split sync signals. RGB signals are straight from SCART to VGA. I rechecked the circuit, don't see anything wrong. Supply is 5V as for specs. Even if the IC is bad or something in my work is bad, how can a +5V damage an entire CRT projector?? I test that signal for no more than 20 seconds...

Can you, or someone else, help me trying with the Hard Reset?

Thanks!

Ciao

Have you tried the zone adjustment, It looks like the zone on the red may be maxed out, and not the bow because each line is bent worse as the one before.

Hi Dav

Most of my convergenge settings are +/- 20 from 128, Zone adjustments are not maxed out.

Can I operate the 1271 without DD and DE boards???? Anyone?

Ciao
A

Yes, but there is a small board that you'll need from a 1251 or 1252.

"Most of my convergenge settings are +/- 20 from 128, Zone adjustments are not maxed out."

Have you tried holding the up or down adjustment on the zone for a few seconds?
There is a two step to those controles, like a course and a fine adjustment.
{ I think, i have not played with my in a while}

Dav

Yes, like you can see in the youtube video I posted!

Small board? Witch one?

Ciao
Antonio

The video shows BOW adjustment..............

The ZONE adjustments have 21 Points to fine tune... get it as best as possible with BOW and the others, then go into ZONE and use the POSITION + and - keys to navigate through the points to tune those reds to where they need to be... DO NOT rip any boards out until you have tried this, PLEASE...

There are 4 points total in that corner area.. working them together, going back and forth between them, you WILL be able to correct this problem.

I agree with Mr Sonynut, Try to work it out with the adjustments.

Sony

I will try, but I'm very sure that it will not works! Convergence was perfect before trying that damn sync splitter!
Check better the youtube video, all settings are working just up to a point and then they're stopping. This is the same with every controls that is deforming horizontal lines, included zone.
I'm used to my 1271, I tweaked it a lot and I know how to converge it without overcorrecting it. This does not mean that you don't have to give suggestions (I'm here to hear them, and I want to thank you for your time), but trust me that is not just an overcorrecting issue!

However, I'll check again.

Ciao
Antonio

Here another video.

Please wait for the second part of it where I'm in the ZONE adjustment. I didn't put the green grid as reference in the first part of the video and it's not so clear.

I set to 128 all parameters: LIN, BOW, SKEW... and ZONE.

BOW does not work, ZONE does not work.

http://www.youtube.com/watch?v=B63gn2SDKE0

Now the question: can I operate the set without DD and DE boards? ;)

Yes, the dd and de boards are not in a vph 1252 or vph 1251, but there is
a small jumper board in one of the sockets instead.

Do'h... Didn't know.

Seems that I cannot test my set without them... :(

So i think you need a new y board and maybe a dd, de?
Did you ask on curts site?

That was Curt's answer also over there.. New Y board. From my experience with an old 1251 of mine, the Y should correct the problem without the DB,DD,and DE boards. It may be only the EEPROMS on the Y board(the two large removable chips), but it's easier to find/just replace the whole Y.

Be careful with sync in the future.. incorrect/too high of sync wil cause issues with ANY CRT.:(

Thanks sony.
Yes, seems that I miss to tie togheter the ground of the splitter with the ground of the CRT...

Y board: I have one from a 1270, perhaps it's defective... Can I try on a 1271?

Reset: let me try hard resetting the beast. But the manual is unclear, see my first post. Can you help me?

Thanks Sony and sorry for last post, I did not mean to be rude, I understand that as first shot you think of overcorrection.

Ciao
Antonio

The 1270 Y will work.. but you will lose your 21 point convergence(you'll get 9), your hour counter, and your numeric adjustment displays. The factory defaults will also be quite off I'll bet. You won't damage the machine by running it, though. It should be good for test purposes.

Of course this is assuming the 1270 Y IS good.

No offense taken, Tony. I was just making sure you tried everything before tearing into the machine:)

Uhm... someone told me that that Y board was defective...

About hard reset, I'd like to test but how can I do it if service manual is not correct... :(

Thanks Sony, you was very kind

Antonio

Ok Guys

I'm still stucked with that 1271 and I don't want to thinker with the switch and buttons until I'll very sure on what I'm doing.

For your convenience I put toghether in a GIF the Service manual pages where the reset is explained.

http://img128.imageshack.us/img128/6074/1271smtc4.th.gif (http://img128.imageshack.us/my.php?image=1271smtc4.gif)

Can someone help me? Seems that something is wrong, Sony say to move the dip switches and restore it at the original position every time. However, on the last step, Sony asks to put the switches 4 and 1 on ON position, but from previous step they has been restored to ON position...

Suggestions?

Ciao
Antonio