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speedyandre
Joined: 18 Dec 2006
Posts: 291
Location: Netherlands
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| Posted: Sun Jul 06, 2008 10:15 pm Post subject: 9500lc lvps repair |
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Hi
I have a Vidikron Vision 1 (9500LC) and it starts up without showing a picture.
When a good lvps is built in it works fine but I don't have one 
On this picture you can see the connector on the back where some leads of the lvps are connected.
I measure 0V on the HTR1 and 6,5V on HTR2 pins.
Are these 2 power cirquits in the lvps delivering 6.3V or is it correct that HTR1 is 0V?
Can someone confirm that if the 0V is not ok I indeed don't have a picture?
When pushing # on the wired remote I should see a menu I suppose ....
This Vision one was delivered incomplete, I'm looking for the IR sensors and their wires.
Maybe the IR sensors of other Marquee crt's like the 8500 will fit on this 9500LC.
If someone has some spares I would like to know 
Thanks
André
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Jul 06, 2008 10:36 pm Post subject: |
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Be carefull measuring around those leads, one goes to the HVPS and is 390 Volts I blew the LVPS that way. I think one of the Hrt pins is the return line but not sure. Also is that connector on the back plane PCB or the Mother board I cant tell?
EDIT, I just looked in the service manual and it only says it a Heater voltage(no Value), Tim or Curt would know more.
Athanasios
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Jul 06, 2008 11:04 pm Post subject: |
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Hello
You are fine, measure across the two pins for 6.3 vdc. You may have lost the high voltage power section; are any red leds lit in the back?
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Jul 06, 2008 11:10 pm Post subject: |
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Just another one of those "***-******" Marquee's again. This one in drag 
Sorry, private joke 
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A Barco is only a AmPro with training wheels
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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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: Sun Jul 06, 2008 11:19 pm Post subject: |
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I have good working LVPS with the filament mod done. Send me an email, shipping via air will be about $75 or so.
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speedyandre
Joined: 18 Dec 2006
Posts: 291
Location: Netherlands
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| Posted: Mon Jul 07, 2008 4:04 pm Post subject: |
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| Tim in Phoenix wrote: | Hello
You are fine, measure across the two pins for 6.3 vdc. You may have lost the high voltage power section; are any red leds lit in the back?
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I measured from the common ground on both pins, I suppose they both should be 6,3V.
The high voltage seems ok since I can hear the tubes hissing when powering up.
Also Reinier has confirmed that the 9500lc worked fine when the focus board and the lvps were exchanged.
On the focus board one chip had died and caused a shortcut, this chip is replaced now.
However the +15V is to high (17V) and I had to turn the heater back from 8V 
I don't know if the missing heater output causes the higher 15V, maybe it's a cirquit that's connected to the 15V's source.
I've emailed Curt for a quote, maybe I can afford his modded lvps
André
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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speedyandre
Joined: 18 Dec 2006
Posts: 291
Location: Netherlands
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| Posted: Mon Jul 07, 2008 5:01 pm Post subject: |
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I do measure 85V, -15V, +15V, -5V and one HTR (6,3V).
Maybe some other supply is missing or a return is broken, fact is that Reinier had it working with another lvps and focus board.
Can I get a picture when the focus board is not inserted?
Maybe the focus board blew the lvps because there was a short in it ....
André
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Mon Jul 07, 2008 5:10 pm Post subject: |
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The thing is you hear the HVPS start up(*tubes crackling). so its not the 390v rail, Can you hear the belly fans run? those are on the 24 volt rails of the LVPS when you try to start it up and there is no pic put your hand over the openings of the focus modual and the HDm to se if its blowing air.
I don tthink it will run with out the FCM in but it will run if you disconnect the focus coil connectors on the FCM. But I doubt that did any harm.
Athanasios
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Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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Arno P
Joined: 01 Jan 2007
Posts: 282
Location: The Netherlands
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| Posted: Mon Jul 07, 2008 5:27 pm Post subject: |
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| speedyandre wrote: | I do measure 85V, -15V, +15V, -5V and one HTR (6,3V).
Maybe some other supply is missing or a return is broken, fact is that Reinier had it working with another lvps and focus board.
Can I get a picture when the focus board is not inserted?
Maybe the focus board blew the lvps because there was a short in it ....
André |
A schematic diagram would help I guess...but couldn't find one up till now  maybe someone else?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Mon Jul 07, 2008 5:31 pm Post subject: |
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I know of no schematic for the LVPS. If it works with another LVPS then I'd say just get a new one. I tried to repair one and its not easy, its a two or three layer board and it can short between layers and once that happens its not repairable unless you have another PCB board and transfer all the parts or a power supply that has the other side damaged and you just swap sections. I'd buy Curts.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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speedyandre
Joined: 18 Dec 2006
Posts: 291
Location: Netherlands
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| Posted: Mon Jul 07, 2008 6:42 pm Post subject: |
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The fans are running, I can feel the air coming along the focus and HDM boards.
On the back a green led is lit so it seems that all works fine, on the lvps (front side) no leds light up.
I'll wait for Curt's offer hoping not to have to break the bank
André
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