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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Mar 27, 2011 10:25 am Post subject: Marquee 9000 horizontal problem |
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My friend's M9000 went wrong.
The projector only works at lower resolutions, sometimes 720p does come in, but then the picture slowly squeezes horizontally to the 2/3 of the original size, but sometimes it doesn't work at all, in this case the H fail led lights up, and the heatsink of the HDM gets really warm.
I've reseated the chips on the HDM and the deflection processor board without any success. We tried the internal frequencies as well, going up from 15kHz to 110kHz went well, but then backwards at 80kHz the picture blanked out again.
The CLM has V3.3 sw and the HDM is a -07p type. My guess is it is not change the high/low band correctly, but why? What do you think which is the problematic board: VIM, HDM, CLM?
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Mar 27, 2011 10:45 am Post subject: |
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Hello
The deflection processor sets band depending on frequency, so the dpb or entire clm are suspect, try another if possible.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Mar 27, 2011 10:55 am Post subject: |
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Thanks!
It seems to be an occasional problem, because after a long time it works perfectly again -without doing anything (sure the machine have knew I wrote about him  )
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Mar 27, 2011 11:03 am Post subject: |
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Oh, and what is the actual point where the relay must switch to high band?
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Mar 27, 2011 2:27 pm Post subject: |
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| gjaky wrote: | | Oh, and what is the actual point where the relay must switch to high band? |
59.5 khz is where the yokes switch from series to parallel for more current. Try cleaning all the socketed chips on the dpb.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Apr 11, 2011 8:03 pm Post subject: |
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Ok, I met in person with the problem... It really sounds like a relay switch problem. fortunately I could measure some things.
The series/parallel switch is always On except 15kHz, in every other case the relay is on regardles of retrace time. The higher band resolutions working well during the retrace is short. The HDM still gets the wrong relay driving signal -I followed the line to R554.
So can we say that that the CLM is the bad guy?
Otherwise H drive signal looked okay on DPB in every cases
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Sparky015
Joined: 12 May 2009
Posts: 1185
Location: Cleveland / Akron, OH
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| Posted: Tue Apr 12, 2011 10:57 am Post subject: |
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That pj may need Dragans cap service as well. Not sure if that thing is still original or not. What is the history on it?
_________________
~Paul
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Apr 12, 2011 1:28 pm Post subject: |
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The pj was recapped right after the buying (~4 months ago). However the CLM was left as it was..
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