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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Thu Feb 14, 2008 10:42 pm Post subject: No picture from Blue and Red CRT on 1031Q |
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Hello, I recently picked up a 1031q. The problem is that there is no picture being displayed on the red or blue crt's. This occurs on both an input and test pattern. The crts are all getting power, since I tried turning up the screen adjustment on one of them, and it displayed a raster and a very faint signal. So I assume wherever the signal splits for the red and blue is the problem. However I am unfamiliar with this set, and could use some advice.
One a side note, I didn't expect this projector to be so small! It is a dwarf next to any other CRT I have.[/b]
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Tinman
Joined: 09 Mar 2006
Posts: 1326
Location: Carson City Nevada
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| Posted: Fri Feb 15, 2008 1:40 am Post subject: |
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Did you turn on the red and blue tube switches under the convergence controls?
Marc
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Fri Feb 15, 2008 2:01 am Post subject: |
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Yep checked those.
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Tinman
Joined: 09 Mar 2006
Posts: 1326
Location: Carson City Nevada
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| Posted: Fri Feb 15, 2008 5:54 pm Post subject: |
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Hmm.....
Odd one...
Check all the cables are plugged in. Also wiggle the normal/test switch. They tend to crack the connections.
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Fri Feb 15, 2008 7:24 pm Post subject: |
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Thanks for the advice, I checked all of the connections I could find, and tried messing with the norm/test switch, but still nothing. Any idea on what board could be causing this?
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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 Feb 15, 2008 7:48 pm Post subject: |
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Check the tubes for the orange glow from the filaments. The CRT socket or CRT output board right behind the socket can bad.
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Brooklyn
Joined: 17 Sep 2007
Posts: 494
Location: Morgan Hill, CA
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| Posted: Fri Feb 15, 2008 7:53 pm Post subject: |
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Yep all 3 CRT filaments light up. Should/can I swap those boards from the green CRT?
Edit: I looked and the neck and output boards are labeled for each color, so I am assuming I cannot sway them?
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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 Feb 15, 2008 8:26 pm Post subject: |
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You can swap them. Beware of the one wire 2 pin connector in the middle of the board. Parts around it get really hot, and the male/female portion are usually welded together, and you'll snap the connector when taking it off. If you can solder, then no big deal as you just solder it in place.
Iv'e got spare boards...
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