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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Sat Aug 30, 2008 3:37 pm Post subject: 9500lc problem |
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Hi guys,
Recently my 9500lc refused to work. Bascially when I press the power button, I can hear the projector coming to life but the HV crackle is missing. ANy idea what might be the problem? I tried reseating the HDM, Focus board and the DPB chip on the VIM.
Regards.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Sat Aug 30, 2008 3:49 pm Post subject: |
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I tried reseating the LVPS and HVPS in fact I tried swapping with 2 other sets of LVPS and HVPS. I also pressed down on the removable chips on the CLM but still no HV crackle. 
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sat Aug 30, 2008 7:53 pm Post subject: |
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Hello
You may have lost horizontal or vertical scan, and the diagnostic leds will not always light up for those.
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Sun Aug 31, 2008 12:09 am Post subject: |
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There were glycol leaking but my projector is mounted on my ceiling so I do not think that the glycol has touched my boards. I jsut vented my tubes.
Hmm Tim, you might be right. The last time round. it was also my HDM board that gave me the problem.
Anyway could the problem be the neck boards?
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Aug 31, 2008 1:10 am Post subject: |
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| m9500lc wrote: | There were glycol leaking but my projector is mounted on my ceiling so I do not think that the glycol has touched my boards. I jsut vented my tubes.
Hmm Tim, you might be right. The last time round. it was also my HDM board that gave me the problem.
Anyway could the problem be the neck boards? |
Hello
First, look into each lens with a flashlite and make sure no tube face is cracked.
Neckboards are also a possibility. Unplug the 14 pin umbilicals for all three neckboards on the top motherboard and try power. If you get the high voltage crackle back then reconnect the umbilicals one at a time. The one you connect that loses HV again is your bad neckboard.
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Sun Aug 31, 2008 7:26 am Post subject: |
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hi tim,
I've check the tube face. Everything is fine. I'm not too sure what you meant by the 14 pin umbilical cord on the top motherboard.
Regards
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Arno P
Joined: 01 Jan 2007
Posts: 282
Location: The Netherlands
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| Posted: Sun Aug 31, 2008 7:44 am Post subject: |
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just to be sure....no LEDs on on the LVPS?
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Sun Aug 31, 2008 7:54 am Post subject: |
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| m9500lc wrote: | hi tim,
I've check the tube face. Everything is fine. I'm not too sure what you meant by the 14 pin umbilical cord on the top motherboard.
Regards |
If you look where the neck boards are at the rear of the tube, you will find a black ribbon cable running out the bottom with a white connector which attaches to the motherboard lying flat beneath the tubes.
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Sun Aug 31, 2008 3:47 pm Post subject: |
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I've tried swapping the HDM and Focus board and also removing the 3 neckboards 14 pin cable but still there isn't any HV crackle... any idea where else to check?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Aug 31, 2008 4:37 pm Post subject: |
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One time i forgot to connect the ribon cable on the back heat sink to mother board and it would turn of fans but no crakle, try that too. Also since it it ceiling mounted make sure the HDM is seated up tight, Make sure the foam on the HDM case cap is still putting pressure on the HDM board. Even if you reseat it it will slip out enough not to make contact by the time you hit the remote. Double check it, or hold it in while turning on PJ.
Athanasios
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Mon Sep 01, 2008 5:01 pm Post subject: |
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Oh man, I've tried unplugging HDM, Focus Board, the 3 neckboards, swapping HVPS and LVPS but i still dun seem to be able to hear the HV crackle.... Any other place that I ought to look at???
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Tue Sep 02, 2008 12:16 am Post subject: |
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Hi nashou,
I've tried that but to no avail too...
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Tue Sep 02, 2008 8:28 am Post subject: |
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Just when I was losing all hope, I hit the jackpot...
I swapped the back panel with another one and it solved the problem. I think the problematic board is the vertical board because there was once when I saw the V. Fail LED light lit up...
I was almost on the verge of getting an Epson 1080UB.... Phew....
I just love CRT!
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Tue Sep 02, 2008 8:33 am Post subject: |
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Good for you! I know how you feel, at times when I find myself troubleshooting a problem, I curse and think about digital, but you need to remember that they have their own share of technical issues too.
Tim did mention the VDM in his earlier posts 
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( B ) ( G ) ( R ) Blendzilla Down Under ( R ) ( G ) ( B ) - Tubes of Fury
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m9500lc
Joined: 31 Dec 2007
Posts: 16
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| Posted: Tue Sep 02, 2008 10:49 am Post subject: |
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Hi Gino,
Yeah I realised that i missed out that part that Tim mentioned.... anyway I've got a peculiar problem... My tubes will go off when a 720p/1080i (60Hz) signal is fed to it but will come back on if I feed it a 408i/480p/1080p (60hz). ANy idea what might be the issue?
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