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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 6:06 pm Post subject: anyone have experience with a crt rejuvenator? |
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I once again have migrated back to a 34" sony directview...the fine pitch model.
I would like to rejuvenate it...are all rejuvenators basically the same? Could a $20 ebay rejuvenator get the job done?
Am I risking life and limb to take this on?
I once bought an Australian Sony...it had unfixable geometry problems because the yoke was upside down for the southern hemisphere. I turned it around and managed to get a much better picture. So, I have some abilities in this realm...
Thoughts?
Ben
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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 Jun 20, 2013 6:49 pm Post subject: |
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No, some work, some don't. THe big thing is, you need the proper CRT socket of the tester.
I had an old B/W B&K zapper that worked wonders on old b/w sets. The shop I worked at also had a later model B&K color one that didn't seem to work as well on B/W tubes, so I always used the old one.
A buddy built a Heathkit one for big $$ at the time, and it didn't work as well as the cheaper B&K.
Of course, I have hte top of the line Sencore... and haven't had a CRT TV here to try it on. 
It didn't work on rebuilding a couple of FP CRT tubes that I tried on it, but I didn't really expect it to.
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 6:55 pm Post subject: |
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How would I know if the one I buy will work for this tv?
Classic Curt...has the rejuvenator, but nobody to rejuvenate
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 20, 2013 7:06 pm Post subject: |
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Why do you want to rejuvenate it? Do it have a problem?
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 7:17 pm Post subject: |
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yes...the pic is a tad weak...i think a rejuvenation could make the set like new.
You guys see the guy on youtube who made his own rejuvenator??
tell me if you think I could try this??
http://www.youtube.com/watch?v=-zitlTbl8N8
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 20, 2013 8:01 pm Post subject: |
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| benareeno wrote: | yes...the pic is a tad weak...i think a rejuvenation could make the set like new.
You guys see the guy on youtube who made his own rejuvenator??
tell me if you think I could try this??
http://www.youtube.com/watch?v=-zitlTbl8N8 |
Well he does have it pretty much right. The only thing I question is his saying the green is not working yet he has a close white. If there was no green then there could never be white.
Other wise I can only say that this procedure has a possibility of damaging the gun and then the tube is worthless. So you have to decide if it's worth the gamble or not.
This is why there is only 1 rejuvenator that has safety protocols built in to try to prevent damage. And that is the Sencore 7000. I'm sure that even this unit can be found cheap now a days since CRT repair is minimal. But I guess it depends on how weak the picture is and what it's worth to repair.
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 8:04 pm Post subject: |
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in terms of rejuvenators...how would I know that the one I buy would work with this sony tube?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 20, 2013 8:17 pm Post subject: |
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As far as the rejuvenator itself they will work with any tube. It's a matter of having the correct adapter for your particular tube pinout. There are 2 options, either the one designed for your model tube or a universal adapter. Of course the universal one would have to have the correct number pins and keyed the same as the tester connector. You must then properly connect each individual wire to the correct location of the tube. The other one, being the correct one for your tube would just be a direct plug in, not individual wires.
These are examples of various sockets: http://www.ebay.com/sch/i.html?_odkw=BK+490b&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.Xcrt+tester+socket&_nkw=crt+tester+socket&_sacat=0
Last edited by macgyver655 on Thu Jun 20, 2013 8:37 pm; edited 1 time in total
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 8:21 pm Post subject: |
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I guess the DIY guy just clamped the wires to the proper pins? No socket required, right?
Do you think I could do what he did with North American power?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 20, 2013 8:24 pm Post subject: |
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| benareeno wrote: | I guess the DIY guy just clamped the wires to the proper pins? No socket required, right?
Do you think I could do what he did with North American power? |
I don't see why not. You have 220v up there, right?
Curt, what rejuvenator do you have? If you don't use it you should rent it out, LOL.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Thu Jun 20, 2013 9:28 pm Post subject: |
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we have the same as you...110?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Jun 20, 2013 9:38 pm Post subject: |
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| benareeno wrote: | | we have the same as you...110? |
We actually have 220v and we can derive 110v from each half. So we have both.
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HD-DAVE
Joined: 16 Feb 2007
Posts: 225
Location: Delta, BC
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| Posted: Fri Jun 21, 2013 4:04 pm Post subject: |
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HI Benareeno, when you say the picture is a "bit weak", I still do not understand what you mean by that reading this thread through. IE what was it about the image made you think the crt was at fault. Can you post a couple of screen shots ? ... maybe one with a brightly lit daytime outdoor scene and another with a night/indoor darker one so we can see a range ?
I too used to work in a TV service shop so these threads always are fun to join in !
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Jun 21, 2013 6:10 pm Post subject: |
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Just think of a 10 year old tv which was used mainly in vivid mode...the light output will be weak, won't it?
I was thinking rejuvenating the tubes might make it look like new, but now I'm thinking that rejuvenating is more of a last ditch effort.
I dialed in a nice picture last night...and now I will more than likely put the rejuvenation thoughts on hold. Unless there is some other less harmful process like a re-activation or something.
I notice the sencore 7000 has several different levels of rejuvenation/reactivation....but the DIY method is likely more of a last ditch and likely more harsh.
Maybe a Sencore will come up for sale for cheap on ebay...
Ben
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Jun 21, 2013 6:21 pm Post subject: |
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One other factor...the set has been turned off for a fairly long time...there were convergence errors (minor) when I fired it up. But, those errors have largely disappeared now...perhaps it need a long period of use to get back in the groove?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Jun 21, 2013 7:24 pm Post subject: |
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| benareeno wrote: | | One other factor...the set has been turned off for a fairly long time...there were convergence errors (minor) when I fired it up. But, those errors have largely disappeared now...perhaps it need a long period of use to get back in the groove? |
Capacitor reforming.
Picture quality may also increase with some use.
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Jun 21, 2013 7:32 pm Post subject: |
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would these be caps on the neck board?
Would recapping a set make for any improvement in pic quality? And if so, in what areas?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Jun 21, 2013 7:47 pm Post subject: |
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Capacitor reforming is not a big deal. Even new off the shelf can sometimes reform. Plus, you have to remember, sometimes an older cap can be better then a new one, depending on manufacturer.
To answer your question as to whether any recap would help the picture? ONLY, if there is a bad cap in there now. If there is not, then recapping won't do a thing.
Also, the convergence issue would not be caps on the neck board.
What are your brightness and contrast settings at?
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benareeno
Joined: 22 Mar 2006
Posts: 1614
Location: ottawa, canada
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| Posted: Fri Jun 21, 2013 8:39 pm Post subject: |
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I dialed it in last night with contrast at about 1/2 and brightness was a bit over half...I think. I'll have to double check.
I run crt's with lower contrast than most...I lower it until blooming is gone.
What if I did that diy kit with 110 volt AC? Could that possibly mimick the crt reactivate function of the sencore? The manual states that reactivate only uses 1ma of current, but I am unsure of the voltage...but it runs for 30 seconds. Whereas that video above, I'm sure the current is likely higher. Or would just the voltage be higher, but the current lower?
BTW, I enrolled in electronics out of high school...but dropped out!
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