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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: Sun Feb 11, 2007 4:45 am Post subject: |
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Yep, I think you nailed it. I've got buckets of neck boards here, I'll send you a couple of the later/other design without R22. I've replaced R22 in a bunch of the sets, and haven't had an issue, but to be safe here, I'll send you the other design.
Send me your address again to my home email. I've got an Ampro 2000 on the bench right now, so I'll test boards and ship tomorrow.
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Feb 11, 2007 5:54 am Post subject: |
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Beautiful. I was going to ask for the other design.
I'll send you an email. Did you find a set of convergence boards for me too?
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sun Feb 11, 2007 6:05 pm Post subject: |
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| AnalogRocks wrote: | Since my tubes apear to be fine and working ok then I shouldn't be worried?
Would this cause the power supply behaviour that I have been seeing? Either the R22 blown out or the tubes shorting for a few seconds? |
When the heater shorts to the cathode it turns that tube full on. Alot of times it is just for a second or two. It causes the remote to display "Hi Beam Current" and shuts the projector off. You might turn the projector back on and all will be well. If it happens enough R22 eventually toasts. I don't remember what the symptoms are, though. The mod to fix it is simple enough. Lift the end of R1 that DOESN'T connect to the cathode pin of the tube socket and connect a parallel circuit of 100K 1/2W and 1N4004 (or 4005,6,7) from R1 to PCB. Anode toward R1. Check the pics. R22 burning up plagued Ampro until this fix came along.
Scott
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Mon Feb 12, 2007 2:37 am Post subject: |
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Found another anomaly:
There's a big black tuning pot on the top of each tube. The green and the blue are down and the red one is sticking up. What are these used for and should I be worried?
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Mon Feb 12, 2007 11:26 pm Post subject: |
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Anyone?
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Tue Feb 13, 2007 1:10 am Post subject: |
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| AnalogRocks wrote: | Found another anomaly:
There's a big black tuning pot on the top of each tube. The green and the blue are down and the red one is sticking up. What are these used for and should I be worried? |
The tuning coils are to make the picture width the same on the three colors. Turn off the registration and make them the same width or as close as you can. Use a plastic tuning tool. Just about guarantee that a metal allen wrench will crack the slug.
Scott
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"Were we directed from Washington when to sow and when to reap, we would soon want bread."
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CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
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| Posted: Tue Feb 13, 2007 3:18 am Post subject: |
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| tse wrote: | | AnalogRocks wrote: | Found another anomaly:
There's a big black tuning pot on the top of each tube. The green and the blue are down and the red one is sticking up. What are these used for and should I be worried? |
The tuning coils are to make the picture width the same on the three colors. Turn off the registration and make them the same width or as close as you can. Use a plastic tuning tool. Just about guarantee that a metal allen wrench will crack the slug.
Scott |
Where might one get such a plastic tool? Because I definately didn't use a metal one on my marquee and crack the slug. Nope, not me sir. 
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Tue Feb 13, 2007 3:18 am Post subject: |
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Thanks Scott. I'll see what I can find that's plastic and fits.
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Fri Mar 09, 2007 2:50 am Post subject: |
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BUMP
Incova had some Ampro questions. I thought this may possibly help him
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Fri Mar 09, 2007 2:59 am Post subject: |
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Here's the one I was talking about in the PM incova hope this helps.
| AnalogRocks wrote: | With registration off, the red tube's image is tilted on the screen. I'm guessing I have to rotate magnets to fix this? It's off by about 10 deg's. With the registration on it will allow me to fix it with squew. I just thought it may be better to have the red neutral instead of pulling it up with the registration. I notice there's no glue on the magnets. Could they have shifted durring shipping to cause this?
I'll read up on it and hopfully not get zaped. Which set of magnets do I rotate to level off the horizon on the red tube? |
| Curt Palme wrote: | | No, rotate the whole yoke. That's the one on the tube neck closest to the bell of the tube that the 4 connectors from the circuits go to. Loosen the clamp and rotate it slightly. |
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Apr 01, 2007 10:09 pm Post subject: |
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Got the replacement neck cards. Seems one has a streaking problems and the other has diagonal lines when there is no signal present. I swapped tubes and got the same result.
The tuning pot pictured above is already cracked. The little core piece seems to be sitting there. DOH! Where can I find one of those? I need to widen the rasters there's about an inch not used on one side and 1/2 inch on the other.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Apr 01, 2007 10:33 pm Post subject: |
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| AnalogRocks wrote: | | Thanks Scott. I'll see what I can find that's plastic and fits. |
Go to Radio Shack. Buy the 5 piece TV alignment set #64-2220.
The green one fits that core. How do I know? Just a guess? NOPE, I have them both in front of me 
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Apr 01, 2007 11:27 pm Post subject: |
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I touched it with my fingers and it seems it WAS just sitting there. It fell off. DAM.
I thought of radio shack first. I'll pick up a set. Thanks for the part number.
Anyone got a core I could get off them?
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Robert A. Hill
Joined: 19 May 2006
Posts: 182
Location: Simpsonville, SC
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| Posted: Sun Apr 01, 2007 11:36 pm Post subject: |
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These cores look just like the ones on the Ampro 2000s. PM me your address and I'll get a couple mailed to you tomorrow.
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sun Apr 01, 2007 11:36 pm Post subject: |
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Without the core makes the widest picture. You might be able to take the core from the color with the narrowest picture and put it in the coil on the widest picture. Otherwise, it's not worth worrying too much about. Those coils have a small range. Get it as close as you can then use size and lin functions to get the width even.
Scott
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Apr 01, 2007 11:42 pm Post subject: |
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| tse wrote: | Without the core makes the widest picture. You might be able to take the core from the color with the narrowest picture and put it in the coil on the widest picture. Otherwise, it's not worth worrying too much about. Those coils have a small range. Get it as close as you can then use size and lin functions to get the width even.
Scott |
Thanks Scott,
Do you have any idea on the streaking or banding on the neck boards? They are the newer type without the R22 resistor. Stangely enough only 2 have isues. Hmmm I wonder if they got knocked around in shipping....
Jeremy
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sun Apr 01, 2007 11:58 pm Post subject: |
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Can you get some screen shots that show the streaking?
Scott
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon Apr 02, 2007 12:00 am Post subject: |
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| AnalogRocks wrote: | | tse wrote: | Without the core makes the widest picture. You might be able to take the core from the color with the narrowest picture and put it in the coil on the widest picture. Otherwise, it's not worth worrying too much about. Those coils have a small range. Get it as close as you can then use size and lin functions to get the width even.
Scott |
Thanks Scott,
Do you have any idea on the streaking or banding on the neck boards? They are the newer type without the R22 resistor. Stangely enough only 2 have isues. Hmmm I wonder if they got knocked around in shipping....
Jeremy |
Do a 4[test] and with a genlocked test pattern play with your self I mean the blanking to see if it goes away. Move the blanking to extremes shows the anomoly. (back it all the way out) mostly left and right.
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A Barco is only a AmPro with training wheels
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Mon Apr 02, 2007 2:53 am Post subject: |
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OK stefuel, I've finished playing with it. You are corect. The blanking fixed the vertical line problem. the straking is still there though and so are the diagonal lines.
I notices also the red did NOT respond to the blanking at all. Wierd.
Sorry about the focus on the green the camera refused and I'm to tired to argue.
I bumped the G2 up just to take the photo of the red. It's there even when the G2 is adjusted for black level.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon Apr 02, 2007 9:49 am Post subject: |
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I think what you are seeing with the red is a issue with top/bottom blanking. The fact that the red does not respond to blanking controls may be a clue to resolving that. I forget which board does the blanking. Perhaps Scott can help you with that.
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A Barco is only a AmPro with training wheels
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