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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 6:40 pm Post subject: Picture expands and contracts on it's own |
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OK I was doing my magnetics from what I learned a VDC, In the middle of doing this the grid I was working on started to expand and contract sideways then the HDM failed. I put in a spare HDM and the picture still does this expand and contract bit.
I have reset the machine with a full initialization. The problem continues.
Ideas?
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Fri Oct 01, 2010 6:54 pm Post subject: |
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Re-capping the board fixed an HDM that was doing this here recently. Or, the other thing i've been dealing with, drifting voltage from the LVPS can also affect the HDM.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 01, 2010 6:55 pm Post subject: |
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check for loose connections first maybe the neckboard came loose a bit.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Oct 01, 2010 7:04 pm Post subject: |
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Does focus change also?
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 7:11 pm Post subject: |
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Thanks
Dragan the HDM failed and the replacement is doing it too. Both boards bad maybe.
DVH99 Hmm neck boards would cause a HDM to fail and make the new one act weird too?
Mac yes the focus looks off too not much but some i just thought it was my bad magnetic set-up doing that after all I was still adjusting when it happened.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Oct 01, 2010 7:17 pm Post subject: |
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| dturco wrote: | Thanks
Dragan the HDM failed and the replacement is doing it too. Both boards bad maybe.
DVH99 Hmm neck boards would cause a HDM to fail and make the new one act weird too?
Mac yes the focus looks off too not much but some i just thought it was my bad magnetic set-up doing that after all I was still adjusting when it happened. |
I think I meant does the focus change when the image size changes. That could be HVPS. Usually vert may also shrink with horz but is sometimes less noticeable.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 01, 2010 7:18 pm Post subject: |
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hv lead connected properly into the splitter??
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 7:21 pm Post subject: |
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Mac I don't know I was still looking at the internal test pattern grids. I can throw a source to it and see. But I did have a few power outages yesterday also and the P/J was plugged in at the time and the last time it was while I was working on it.
Voltage spike frying the Low voltage and maybe the high voltage power supply seems likely now. 
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Firefly rules. Can't stop the signal.
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Last edited by dturco on Fri Oct 01, 2010 7:23 pm; edited 2 times in total
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 7:21 pm Post subject: |
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| dvh99 wrote: | | hv lead connected properly into the splitter?? |
Yes.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Fri Oct 01, 2010 7:24 pm Post subject: |
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yeah probably lvps then, i still have to get a ups to prevent these things from happening.
i think czeddie has a lvps for sale in the buy and sell topic.
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dvh99
Joined: 25 Dec 2009
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Location: nederland
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| Posted: Fri Oct 01, 2010 7:26 pm Post subject: |
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off topic firefly was a very fun series and i hate the network for cancelling it after 1 season.
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 7:28 pm Post subject: |
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| dvh99 wrote: | | off topic firefly was a very fun series and i hate the network for cancelling it after 1 season. |
Gorahm Idjits, starting with the executives.
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Last edited by dturco on Sat Oct 02, 2010 4:39 pm; edited 1 time in total
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Fri Oct 01, 2010 8:55 pm Post subject: |
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| Nashou66 wrote: | I dont think the voltage spikes are the culprit for sure. What tube were you working on when this happened?
Athanasios |
Red
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Nashou66
Joined: 12 Jan 2007
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Fri Oct 01, 2010 11:32 pm Post subject: |
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If this was a Barco I would guess the quad.
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Nashou66
Joined: 12 Jan 2007
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sat Oct 02, 2010 12:02 am Post subject: |
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Yes the HV quadrupler.
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Sat Oct 02, 2010 12:56 pm Post subject: |
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| draganm wrote: | | Re-capping the board fixed an HDM that was doing this here recently. Or, the other thing i've been dealing with, drifting voltage from the LVPS can also affect the HDM. |
Dvh99 and Dragan win the toasted tube award. It was a loose or dirty connection of the daughter board on the HDM. I swapped the daughter boards between the two HDMs and its working again.
I heard a lot of noise near the HDM and convergence boards so I unplugged the CVA ribbon and the stig cables to isolate the noise. It was coming from the HDM so it was a loose connection on the original board and a bad spare board that worked last year.
I guess improper storage caused a problem?
Any way I'm still here, and haven't gone DIGITAL.
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