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What do I do if I acquire a g90 with a dead Dallas chip?
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bachiano



Joined: 13 Mar 2006
Posts: 163


Posted: Thu Jan 17, 2013 1:20 am    Post subject: What do I do if I acquire a g90 with a dead Dallas chip?

Thanks in Advance.
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dturco



Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland

TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner

Posted: Thu Jan 17, 2013 1:36 am    Post subject:

Cry.
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Thu Jan 17, 2013 1:38 am    Post subject:

Replace the Dallas chip. What's the problem? Smile
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CasetheCorvetteman



Joined: 09 Nov 2008
Posts: 6326
Location: Australia

Posted: Thu Jan 17, 2013 2:52 am    Post subject:

Trade it on an NEC Wink
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Phoenixed



Joined: 13 Oct 2011
Posts: 514
Location: The mitten

Posted: Thu Jan 17, 2013 3:54 am    Post subject:

Shouldn't he be worried about deflection burns in the tubes?
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mx83toy



Joined: 14 Dec 2012
Posts: 322


Posted: Thu Jan 17, 2013 3:55 am    Post subject:

send it to me in australia..... curt im going to need a dallas chip thingy lol
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Thu Jan 17, 2013 4:26 am    Post subject:

Not always. Check the tubes with a flashlight, if you see a tiny spot burn near the middle of one or more tubes, then you're effed, but if the Dallas chip died while the set was off, then the tubes should be OK.
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ElTopo



Joined: 07 Nov 2006
Posts: 1640


Posted: Thu Jan 17, 2013 10:13 am    Post subject:

Switch to a Barco CRT Cool
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Barco Cine 9 the one and only
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CIR Engineering



Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany

Posted: Thu Jan 17, 2013 3:14 pm    Post subject:

Why do you think you have a bad Dallas chip?

If you have the correct green error code on boot up then you can perform a default Dallas memory lode with the jumpers. You will lose your serial number and hour counter, but the projector will work fine.

Just don't short out your YA board while doing the factory load. It's easy to do by pressing the YA against the chassis.

craigr

_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying Wink
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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bachiano



Joined: 13 Mar 2006
Posts: 163


Posted: Thu Jan 17, 2013 7:54 pm    Post subject:

I don't have a g90 yet Smile
There is a G90 in my area with a good chip but the set is from 2000.
There is another one in Miami and the seller said the Dallas chip is Dead.

I'm not going out of my way to pick these up but I'm keeping my eye out for one, so I'm trying to prepare.

Thanks for the advice guys.
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Phoenixed



Joined: 13 Oct 2011
Posts: 514
Location: The mitten

Posted: Thu Jan 17, 2013 9:40 pm    Post subject:

Just make sure you check the ya board ic421 serial number before you pay anything.
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bachiano



Joined: 13 Mar 2006
Posts: 163


Posted: Thu Jan 17, 2013 10:43 pm    Post subject:

Phoenixed wrote:
Just make sure you check the ya board ic421 serial number before you pay anything.


What are the ic421 serial numbers that are safe?
Is there a year G90's stopped suffering from this ?
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Phoenixed



Joined: 13 Oct 2011
Posts: 514
Location: The mitten

Posted: Thu Jan 17, 2013 11:28 pm    Post subject:

My G90 was from 2000 as well and had a bad chip, however I don't remember the exact serial number. Craig Rounds maintains a database of good/bad chips, or at least I thought he did. So I am sure he will chime in with his thoughts.
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC

TV/Projector: All of them!

Posted: Thu Jan 17, 2013 11:46 pm    Post subject:

Guys, to me it's mandatory to change ANY Dallas chip in a G90 that's over 5 years old. Short of checking the original hour count, I don't even test run a set with an old Dallas chip in it. If it (the chip) shuts down while the set is on, there's a good chance that you'll spot burn the tubes. I've talked with Craig about this, and while he has yet to see a G90 do this, I've seen it about 4 times.

Also, don't buy the Dallas chips on eBay. Most are OLD STOCK, and are no better than the ones in the set. Buy new, from me, or Mouser or Newark.
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central

Posted: Fri Jan 18, 2013 2:20 am    Post subject:

You mean the one on Craigslist. Have you called the guy? I tried, but the number was not correct. I emailed him as well with no response.

As for you, Craig Rounds, don't think I didn't notice that you have expanded your calibration arsenal. Shocked Mr. Green Thumbs Up
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bachiano



Joined: 13 Mar 2006
Posts: 163


Posted: Fri Jan 18, 2013 2:24 am    Post subject:

Yes Spanky.
That's the one.
I also emailed him, twice with no response.
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central

Posted: Fri Jan 18, 2013 2:48 am    Post subject:

LOL, I even looked up recyclers and tried to find the place of business, but to no avail.
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CIR Engineering



Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany

Posted: Fri Jan 18, 2013 4:12 pm    Post subject:

Phoenixed wrote:
My G90 was from 2000 as well and had a bad chip, however I don't remember the exact serial number. Craig Rounds maintains a database of good/bad chips, or at least I thought he did. So I am sure he will chime in with his thoughts.

The G90 serial number doesn't tell much about the quality of the IC421 on the YA board. However, generally speaking lower serial number G90 units are more likely to have IC421 chips that are the "good" ones.

There is only one lot of IC421 chips that fails. To check the IC421 lot number you have to pull out the YA board and look on the IC421 its self. If the IC421 has the following lot number it is one that might fail in the future "003A01E." There are I think six lots of IC421, but unfortunately lot number 003A01E seems to have been the largest volume run.

Even if you have an 003A01E this does not mean that it will fail. It only means that it is one of the vulnerable chips.

craigr

_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying Wink
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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CIR Engineering



Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany

Posted: Fri Jan 18, 2013 4:21 pm    Post subject:

Spanky Ham wrote:
You mean the one on Craigslist. Have you called the guy? I tried, but the number was not correct. I emailed him as well with no response.

As for you, Craig Rounds, don't think I didn't notice that you have expanded your calibration arsenal. Shocked Mr. Green Thumbs Up

Very Happy

I really needed a fast meter for doing 125 point Radiance calibrations. So I bought the Hubble and thought that would be good enough. I am using the PhotoResearch to create offsets for the colorimiters so I figured if the colorimiter is not quite as accurate that it would not make a difference when using the PR as reference...

...turns out that part of my logic was correct. The problem with the Hubble is that on low IRE test patterns the measurements drift for about one minute after starting a new measurement. So if I was reading a 30IRE gray window, than the color reading would gradually keep changing for the first minute of measurement on a new adjustment.

The 125 point auto calibration takes readings as soon as the meter is ready. There is no way to account for the drift on the Hubble so my 125 point calibrations weren't coming out nearly as accurate as I wanted.

So I decided I needed a Klein K10-A because that meter doesn't drift at all. The K10-A also does not need dark readings and does not drift with temperature. And the K10-A can read even lower IRE levels than the Hubble could.

So I wound up using the Hubble for about six weeks. Not very cost effective, but I got to where I need to be now.

...anyone want to buy a Hubble?

craigr

Also, I did some testing with the K10-A last night and found that on CRT the K10-A and the PhotoResearch are withing 5% of less for gray and primary colors readings. I didn't expect the K10-A to be so good!

_________________
JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
Light Illusion ColourSpace XPT Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
OMARDRIS JVC Software Patch to use K10-A and Jeti with JVC OEM AutoCal Software!
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Authorized Dealer for Lumagen & just about everything worth buying Wink
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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Spanky Ham



Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central

Posted: Sat Jan 19, 2013 6:41 pm    Post subject:

Wow, so the Klein is that close to the PR? Are you still going to use the PR for reference or do you envision the Klein being your main instrument?
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