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walteritaly
Joined: 21 Mar 2020
Posts: 90
Location: Italy
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| Posted: Fri Jun 12, 2020 5:44 pm Post subject: Marquee 9500lc red tube out of focus, help! |
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Hello everyone, after having changed all the boards, minus the power supplies, the projector started working again but i cannot seem to succed in making the red tube to focus.
In first place the pj's fault came to be thanks to a high voltage shock in the exact same red tube (it burned the CLM).
Now the red tube is out of focus and the image seems to have shifted in one place, it lights up, the contrast increases and decreases but it wont focus. I have also tried to reverse the red tube with the green one but the problem still persist. Maybe i have to demagnetize the tube's front? Is this the right solution? Anybody can please give some advice?
Greetings Walter.
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CRT's the best!! 1 "VDC Marquee 9500lc full model and franke yokes hfq 900 lenses"- Marquee 9500lc HD10 GT17 moome v2 - DVDO vp50 pro- Lumagen radiance mini.
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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: Sat Jun 13, 2020 3:31 am Post subject: |
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Swap the focus yoke wires so that the green adjustments actually adjust the red, and vice versa. Likely the focus board is bad, but that's one way to make sure the tube/focus yoke is OK.
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walteritaly
Joined: 21 Mar 2020
Posts: 90
Location: Italy
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| Posted: Sat Jun 13, 2020 6:10 am Post subject: |
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| Curt Palme wrote: | | Swap the focus yoke wires so that the green adjustments actually adjust the red, and vice versa. Likely the focus board is bad, but that's one way to make sure the tube/focus yoke is OK. |
Hi Curt, i have changed the yok of deflession, the focus coil and the CPC magnets taken from another projector, thanks to this i managed to solve the problem.
Probably the focus coil was broken, now the focus of the red is as sharp as a knife.
Thank you so much!
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CRT's the best!! 1 "VDC Marquee 9500lc full model and franke yokes hfq 900 lenses"- Marquee 9500lc HD10 GT17 moome v2 - DVDO vp50 pro- Lumagen radiance mini.
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dvh99
Joined: 25 Dec 2009
Posts: 2158
Location: nederland
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| Posted: Wed Jun 24, 2020 1:08 am Post subject: |
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i have never heard of a focus coil gone bad, but there is a 1st time for everything.
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1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Wed Jun 24, 2020 6:52 am Post subject: |
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I think a danish projector collector experienced different focus coil behaviour due to inconsistent magnetic strength within the coil.
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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walteritaly
Joined: 21 Mar 2020
Posts: 90
Location: Italy
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| Posted: Wed Jun 24, 2020 7:21 am Post subject: |
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| dvh99 wrote: | | i have never heard of a focus coil gone bad, but there is a 1st time for everything. |
Hi, probably the high voltage discharge hit the focus coil and the deflection coil, also burning the CLM
however by replacing these parts the focus is back.
if you want I can send you by e-mail photos of the problem and the parts that I have replaced.
unfortunately I can't post them here.
_________________
CRT's the best!! 1 "VDC Marquee 9500lc full model and franke yokes hfq 900 lenses"- Marquee 9500lc HD10 GT17 moome v2 - DVDO vp50 pro- Lumagen radiance mini.
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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: Wed Jun 24, 2020 7:39 am Post subject: |
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| walteritaly wrote: | | dvh99 wrote: | | i have never heard of a focus coil gone bad, but there is a 1st time for everything. |
Hi, probably the high voltage discharge hit the focus coil and the deflection coil, also burning the CLM
however by replacing these parts the focus is back.
if you want I can send you by e-mail photos of the problem and the parts that I have replaced.
unfortunately I can't post them here. |
If you resize the picture to 1024 pixels wide they should post here ok
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CRT.
HD done right!
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walteritaly
Joined: 21 Mar 2020
Posts: 90
Location: Italy
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| Posted: Thu Jun 25, 2020 7:32 am Post subject: |
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| dvh99 wrote: | | i have never heard of a focus coil gone bad, but there is a 1st time for everything. |
this is the red focus problem
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CRT's the best!! 1 "VDC Marquee 9500lc full model and franke yokes hfq 900 lenses"- Marquee 9500lc HD10 GT17 moome v2 - DVDO vp50 pro- Lumagen radiance mini.
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