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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Thu Jan 18, 2018 9:47 pm Post subject: Barco 808 picture not full size |
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Hi i have a barco 808 and when i fire up the projecter the picture is taking longer than usual to appear and then when it does appear i only get half the picture initially but after time the picture will start to appear coming from right to left i have attached some pics
I replaced the voltage quadrupler about 3 years ago which i got from curtepalme
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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 Jan 18, 2018 11:32 pm Post subject: |
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Check the 17 volt supply test point on the power supply, and adjust as required. I think it may be off. The main website shows how to do it.
if that's not it, then check your blanking settings in the geometry menu. Worst case, your vertical board may be bad, as that's where the blanking is located.
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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Fri Jan 19, 2018 4:07 am Post subject: |
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Hi yep no worries i will check those thankyou
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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Fri Jan 19, 2018 4:36 am Post subject: |
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Hi have checked the 17v test point and found itwas 25.8v i adjusted trim pot and the best i can get is 20v
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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Fri Jan 19, 2018 4:42 am Post subject: |
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Also the green led on the power supply board is pulsing and now i cant get any picture
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Fri Jan 19, 2018 5:38 am Post subject: |
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| djrunamuk wrote: | | Hi have checked the 17v test point and found itwas 25.8v i adjusted trim pot and the best i can get is 20v |
20v is way too high. If thats the closest you can get to 17v then you must have an issue with your SMPS. You need to repair or replace it. I would stop using the set until you fix this.
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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Fri Jan 19, 2018 7:10 am Post subject: |
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Ok i removed the smps and found about 6 bad solder joints i resoldered and installed now i have got the picture back but only when the 17v test point is reading about 23v any thing under and i loose the pic but i still have original fault with picture not full
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djrunamuk
Joined: 02 Jun 2013
Posts: 7
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| Posted: Fri Jan 19, 2018 7:18 am Post subject: |
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I have checked the blanking for the left side and and was able to adjust to get a bit more picture but i am out of adjustment
I will see how it goes
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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 Jan 19, 2018 3:19 pm Post subject: |
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I am wondering if your meter is reading correctly. At 23 volts, things should start to blow up, and not work perfectly..
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