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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Mon Jan 11, 2016 12:04 pm Post subject: 2 Quads and EHT fail in one week? |
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Hey all! Long time no see 
Anywho, as title suggests , what are the odds? The stack has been rock solid for the last year apart from the monthly drift which I'm used to now.
At this rate I'm guessing the demise of these will be the quads at this rate as I have enough tubes to see me through a life time 
Dave
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Mon Jan 11, 2016 12:23 pm Post subject: |
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Dave,
are those Barcos from the same installation ?
Same production year ?
cheers
ElTopo
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Barco Cine 9 the one and only
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Mon Jan 11, 2016 12:35 pm Post subject: |
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Yeah mate same planetarium install and same year,same hours. 2005 build with 22000 hours on the sets.
I replaced one quad when I got the set and they have both been fine for a year now. The one that had the quad replaced had the eht fail as well, so I'm guessing the eht took out the quad as well? ( Curt? )
The other set hasnt been touched so maybe it was just a coincidence them both going within a week or so of each other.
I'm gonna need to stock up on these things or just pull the plug all together once I run out I suppose.
Dave
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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: Mon Jan 11, 2016 2:41 pm Post subject: |
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Don't use the original 909 quads with the single lead. They are junk, and I've had low hour 909s have those fail. Crappy silicone goes conductive after 6 or so years. Use the old style, and heat shrink the focus lead about 4 layers, and tie it off so that the rubber/covered end floats in the chassis, away from the metal sides. That's what I do now. I have a limited number of tested working quads if you're out.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Mon Jan 11, 2016 7:12 pm Post subject: |
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Hi Curt
Yeah thats exactly what I've been doing, dont have heat shrink so just electrical will tape will do no?
I have about 4 quads left so will see how we go 
Dave
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gregstv
Joined: 27 Aug 2007
Posts: 628
Location: Australia
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| Posted: Mon Jan 11, 2016 7:30 pm Post subject: |
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Hi Dave,
I have had similar problems. One quad failed so I went through the spares I had and 3 of the 4 that no longer work. Looks like they have died from sitting around. Also had 2 splitters fail.
Greg.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 8:44 am Post subject: |
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Ok so ive changed the quad for a new one and replaced EHT. Same issue, im getting no red leds on eht , rear of tubes glow but no crackle so im guessing no hv to tubes. Splitter?
Hate changing those things when ceiling mounted.
Dave
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Tue Jan 12, 2016 8:52 am Post subject: |
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That is why i'm not doing a ceiling mount 
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 8:55 am Post subject: |
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| ElTopo wrote: | | That is why i'm not doing a ceiling mount |
Yeah but I get the best seat in the house
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Jan 12, 2016 9:07 am Post subject: |
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| huggy wrote: | Ok so ive changed the quad for a new one and replaced EHT. Same issue, im getting no red leds on eht , rear of tubes glow but no crackle so im guessing no hv to tubes. Splitter?
Hate changing those things when ceiling mounted.
Dave |
HV shutdown could be caused by deflection coils, horizontal board, EHT, Quad, splitter. Check the scan fail circuit.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 9:15 am Post subject: |
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Nope checked to see if there were any red leds anywhere but nothing.
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gregstv
Joined: 27 Aug 2007
Posts: 628
Location: Australia
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| Posted: Tue Jan 12, 2016 9:22 am Post subject: |
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Check the plug on the Quad is in correctly, not one pin across. This is easy to do when they are ceiling mounted. Done it myself. Get no red fails and no EHT.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Jan 12, 2016 10:24 am Post subject: |
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| huggy wrote: | Ok so ive changed the quad for a new one and replaced EHT. Same issue, im getting no red leds on eht , rear of tubes glow but no crackle so im guessing no hv to tubes. Splitter?
Hate changing those things when ceiling mounted.
Dave |
HV shutdown could be caused by deflection coils, horizontal board, EHT, Quad, splitter. Check the scan fail circuit.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 10:27 am Post subject: |
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Every board has been changed with the working pj next to it, only thing left is splitter, man Im dredding that one.
There is no scan fail led i can see.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Jan 12, 2016 10:35 am Post subject: |
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| huggy wrote: | Every board has been changed with the working pj next to it, only thing left is splitter, man Im dredding that one.
There is no scan fail led i can see. |
A dead or shorted tube could also create this problem with no EHT LED. Unplug the HV lead one tube at a time.
Did you check h-shift and focus board. If thats bad no HV and no red LED.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 10:40 am Post subject: |
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Well i already unplugged each tube and started set to no avail.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Jan 12, 2016 10:44 am Post subject: |
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| huggy wrote: | | Well i already unplugged each tube and started set to no avail. |
Only other suggestion is H-Shift and Focus board. If the 909 works like other Barco PJs then there is a pulse from that board required for HV if it fails no HV no LED on EHT.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 10:50 am Post subject: |
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Well the pulse is there pulsing away
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gregstv
Joined: 27 Aug 2007
Posts: 628
Location: Australia
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| Posted: Tue Jan 12, 2016 10:56 am Post subject: |
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Have you tried another quad. Just incase you have a second dud.
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Tue Jan 12, 2016 10:57 am Post subject: |
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Its brand new Greg
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