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Percipient24
Joined: 11 Apr 2012
Posts: 5
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| Posted: Wed Apr 11, 2012 1:42 am Post subject: SONY CRT, Red Channel Always On... |
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Hello folks! Long-time lurker, first post. 
I have a SONY RVP-6000Q Commercial Rear-Projection set, which I believe runs on the guts of a SONY 125X/127X. It has worked fine for the 3 years I've had it, with casual use, up until a week ago.
Now it still displays a picture, but the red channel is always on displaying a flat red color across the whole image area. I've entered "Serviceman Mode" and trying the R channel cut-off has no effect ... even when the system thinks the red channel is cut off it's still displaying red across the whole image. Blanking does cover it up.
I have access to another 125X/127X (not rear-projection) that I might be able to scavenge for parts if necessary.
Thank you for your time and consideration - let me know if there are any troubleshooting steps/tests you'd like me to perform to help diagnose the problem.
Cheers!
- Joe
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Apr 11, 2012 1:53 am Post subject: |
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I'll bet the CA(G) board is bad.
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Percipient24
Joined: 11 Apr 2012
Posts: 5
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| Posted: Wed Apr 11, 2012 2:12 am Post subject: Thank you! |
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Within 11 minutes, and from the man himself!
I've done some quick Googling and have come up with no leads on a CA(G) board. Here are some more questions:
What and where is the CA(G) board, and how can I test it?
(pointing me at some reading material is acceptable, even preferred! )
Is this CA(G) board something that might work scavenged from that 127X that I've already got?
(I think it's a 1272-e SuperData or something ... this other projector lives in a different household many miles away).
Thanks for the speedy response!
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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Percipient24
Joined: 11 Apr 2012
Posts: 5
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| Posted: Wed Apr 11, 2012 2:34 am Post subject: Wonderful! |
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Ah! Forgive me. 
If it's any consolation, my dad found that and linked me at about the same time.
I'll take a look and see what's what. Updates to follow.
Thanks!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Apr 11, 2012 2:38 am Post subject: |
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Curt is always super fast mate 
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Apr 11, 2012 2:50 am Post subject: Re: Wonderful! |
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| Percipient24 wrote: | Ah! Forgive me.
If it's any consolation, my dad found that and linked me at about the same time.
I'll take a look and see what's what. Updates to follow.
Thanks! |
Just giving you a hard time.
THere's not much testing you can do on that board, but if you do have a spare set, swap the other board in and see if you have your red back. If you don't have that board, I can repair the bad one.
Case, I am NOT going to make a sarcastic comment about your comment.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Apr 11, 2012 3:11 am Post subject: |
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Curt, its probably best you dont 
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Apr 11, 2012 3:12 am Post subject: |
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In less mixed company, I sure would though. Hahahaha!
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Joe P.
Joined: 26 Mar 2008
Posts: 13
Location: Marcy, NY
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| Posted: Wed Apr 11, 2012 3:28 am Post subject: Another minute-man? |
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| CasetheCorvetteman wrote: | | Curt is always super fast mate |
The real question, is "How would Case know?"
_________________
If you try to fail and succeed, which have you done? (CRT convergence excepted)
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Joe P.
Joined: 26 Mar 2008
Posts: 13
Location: Marcy, NY
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| Posted: Thu Apr 19, 2012 11:13 pm Post subject: The Visine approach |
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| Curt Palme wrote: | | I'll bet the CA(G) board is bad. |
Thanks for the quick input, Curt! I'm heading out to my son's this weekend with the VPH-1251Q set to pull parts from, so we'll know soon enough if we can "get the red out" of his RP beast.
In the event that it *is* the CA(G) board and he wants to get his repaired rather than scavange from the 1251, do you happen to have any 1271 DD and DE boards available that you want to be rid of? As long as we've got the 1251 open, I figure we might as well do that simple upgrade if we can get the parts.
...because two working Sony projectors MUST always be better than just one!
_________________
If you try to fail and succeed, which have you done? (CRT convergence excepted)
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Thu Apr 19, 2012 11:43 pm Post subject: |
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No, to get the 21 point convergence, you also need to add the YA board with the 21 point software. I've never had a spare of those, sorry!
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Joe P.
Joined: 26 Mar 2008
Posts: 13
Location: Marcy, NY
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| Posted: Fri Apr 20, 2012 12:12 am Post subject: Curt, like rust, never sleeps (or stops watching his forums) |
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| Curt Palme wrote: | | No, to get the 21 point convergence, you also need to add the YA board with the 21 point software. I've never had a spare of those, sorry! |
Ah, then I was misled by the entry at http://www.curtpalme.com/Sony125x_Layout9.shtm - no mention of the YA there.
Oh well, it was worth asking about.
Wish us luck for the weekend and our CA(G) troubleshooting!
_________________
If you try to fail and succeed, which have you done? (CRT convergence excepted)
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Fri Apr 20, 2012 12:47 am Post subject: |
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You're right, my bad. IT also needs the Ya board. I wrote that when I was really young..
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Percipient24
Joined: 11 Apr 2012
Posts: 5
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| Posted: Fri Apr 20, 2012 11:48 pm Post subject: |
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| Quote: | | but if you do have a spare set, swap the other board in and see if you have your red back. |
Alright, so we swapped out the CA(G) and the red may be fixed ... but now the Blue is doing what the Red was.
Should I also swap in the CA(B)? (asking first in case there's another way to go)[/quote]
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Joe P.
Joined: 26 Mar 2008
Posts: 13
Location: Marcy, NY
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| Posted: Sat Apr 21, 2012 12:09 pm Post subject: Re: Wonderful! |
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| Curt Palme wrote: | | but if you do have a spare set, swap the other board in and see if you have your red back. |
The good news is that we have the spare 1251Q board(s). The (perhaps) bad news is that the CA(G) and (B) spares differ slightly from those in the rear projection set that's having the problem. Specifically, the CA(G) has an extra transistor and heat sink just above where the gray ribbon cable connects (middle of the board, borrom), and the CA(B) has an extra black connection (in addition to the larger orange one).
That said, we took the leap of swapping the CA(G) and ended up getting rid of the red wash, only to have it replaced by blue, hence the wondering about whether or not to also swap the CA(B) - but if the boards aren't identical, could that also be a problem or petentially hurt rather than help?
As a side note, we're getting really, REALLY good at removing and replacing little brass-colored screws (they're EVERYWHERE!)
_________________
If you try to fail and succeed, which have you done? (CRT convergence excepted)
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Percipient24
Joined: 11 Apr 2012
Posts: 5
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| Posted: Sat Apr 21, 2012 3:26 pm Post subject: SUCCESS! |
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So we got impatient and swapped in the CA(B) board from the 1251. The picture is now back to normal. Hooray!
You can expect an email soon to discuss perhaps repairing the old boards.
Thanks for all the help.
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