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Arno P
Joined: 01 Jan 2007
Posts: 282
Location: The Netherlands
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| Posted: Wed Oct 01, 2008 5:32 pm Post subject: 9500LC NeckBoard C47 |
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I guess that C47 is no longer present in any 9500lc design ...right (cant find the bastard and I do have a 1100 chip on there)?
Re: Remove Capacitor on VNBs with HFA1100
Symptom: Marquee 8000 or Marquee 9000 projectors may display uncharacteristically “noisy” images. As well, the image may blank out if the brightness is adjusted to 0.
Cause: U2 on the Video Neck Board (VNB) was changed from a CLC409 to an HFA1100. The CLC409 required the presence of C47 a 4.7pF capacitor. The HFA1100 does not require the 4.7pF capacitor and may cause the above
symptoms if it is on the VNB.
Action: If it is felt that the above symptoms are significant, then examine each of the three VNBs within the projector and observe whether or not U2 is a CLC409 or an HFA1100. If U2 is an HFA1100, then remove C47 if it is present on the board. Consult the service manual for your particular model of projector to assist you with any of the projector dissassembly required in order to be able to observe the VNB components. The U2 and C47 component designations apply to all the Marquee models (8000, 9000 with Thomson CRTs and 9000 with Panasonic CRTs).
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Wed Oct 01, 2008 5:53 pm Post subject: |
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Arno some of the new VNB's had the HFA1100 aswell you need to look at the VNB's part number, you have a new VNB that doesnt need that cap removed, dont go by parts on the VNB's or any other Board on the marquee go buy actual part numbers on the boards...and even then its not 100% sure, you may have a board thet all the bullitens repairs were allready done.
Athanasios
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Marquee Modifications and Performance Enhancement
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Arno P
Joined: 01 Jan 2007
Posts: 282
Location: The Netherlands
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| Posted: Wed Oct 01, 2008 5:59 pm Post subject: |
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| Nashou66 wrote: | Arno some of the new VNB's had the HFA1100 aswell you need to look at the VNB's part number, you have a new VNB that doesnt need that cap removed, dont go by parts on the VNB's or any other Board on the marquee go buy actual part numbers on the boards...and even then its not 100% sure, you may have a board thet all the bullitens repairs were allready done.
Athanasios |
Ah ok got it...
And by the way....I just put "your" opamps on the 3 neckboards (no 449   )...and it still works after the mod
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Wed Oct 01, 2008 6:01 pm Post subject: |
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| Arno P wrote: | | Nashou66 wrote: | Arno some of the new VNB's had the HFA1100 aswell you need to look at the VNB's part number, you have a new VNB that doesnt need that cap removed, dont go by parts on the VNB's or any other Board on the marquee go buy actual part numbers on the boards...and even then its not 100% sure, you may have a board thet all the bullitens repairs were allready done.
Athanasios |
Ah ok got it...
And by the way....I just put "your" opamps on the 3 neckboards (no 449 )...and it still works after the mod |
See I told you !!!!
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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Arno P
Joined: 01 Jan 2007
Posts: 282
Location: The Netherlands
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| Posted: Wed Oct 01, 2008 6:05 pm Post subject: |
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| Nashou66 wrote: | | Arno P wrote: | | Nashou66 wrote: | Arno some of the new VNB's had the HFA1100 aswell you need to look at the VNB's part number, you have a new VNB that doesnt need that cap removed, dont go by parts on the VNB's or any other Board on the marquee go buy actual part numbers on the boards...and even then its not 100% sure, you may have a board thet all the bullitens repairs were allready done.
Athanasios |
Ah ok got it...
And by the way....I just put "your" opamps on the 3 neckboards (no 449 )...and it still works after the mod |
See I told you !!!!
Athanasios |
Stubborn....but not stupid 
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