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G90 owners may want to consider this: BA Board Rebuild

 
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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Thu Dec 24, 2020 4:02 pm    Post subject: G90 owners may want to consider this: BA Board Rebuild Reply with quote


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Having me rebuild your BA board. All of the BA boards that I have seen in recent years have exhibited the problem with horizontal lines running through the image to some degree or another.

Curt wrote:
Curt Palme wrote:
...I do have two RGB input boards that pass signal, but have lines running through the image (I suspect bad SMT electrolytic caps)...


I responded with:
CIR Engineering wrote:
This has been a common issue with the BA boards that surprisingly has not gotten much attention on the forums. The early signs are that when the projector is first turned on horizontal lines (about 1.5" depending on screen size) will roll quickly from either top to bottom or bottom to top, slow down, and then reverse direction. When the problem begins the lines will slowly disappear as the projector warms up. If you want to look, it's easiest to see on a simple white on black cross-hatch pattern, but you can usually see it in real world video even in early stages.

The issue gets worse the older the projector gets whether or not you use the G90. Finally, the problem will become so bad that the lines never disappear and the picture is unwatchable. Even long before this state, rebuilding the BA board will make the image much better. The problem causes a haze in the image and loss of clarity and sharpness. Black level is also affected because the lines are of alternating brightness levels.

I've been rebuilding BA boards because of this for the past three or four years. It's caps and power chips. It's best to keep a specific BA board with its matching neck cards and YA board whenever possible (BA and neck card most important), so I like to rebuild the projector's original BA board whenever it's available. I charge $350 $395 parts and labor plus shipping and PayPal fees to do the job. I do them on off-days because they actually do take a full day of work once I unpack, rebuild, test, and then repack.


A forum member harry27 had me rebuild his BA board a few weeks ago, but he brilliantly captured the distortion in a video before he sent the board to me for rebuild. I got permission from him to post his video linked below. If yours looks this bad in real world, it will be blatantly obvious in a cross-hatch pattern. This is what I would still consider "early stage" degradation, it will get much worse. Either way, all the G90's will benefit from a BA board rebuild at this point and you will see an image quality improvement. If you want to keep your G90 for a while or if you are just setting up a new to you G90 I'd suggest having me do this.

Video of problem on real world video:
http://www.cir-engineering.com/bin/banoise.mov

The lines you see may be darker, move faster, or change direction more or less often. Sometimes the lines can even remain stationary at times.

I have been doing lots of these so I keep plenty of parts in stock at all times and can turn these over quickly as long as we coordinate on date before shipping. Please email me if you are interested. Also, feel free to call or text.

craigr

_________________
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Authorized Dealer for Lumagen & just about everything worth buying Wink
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892


Last edited by CIR Engineering on Tue Jan 25, 2022 5:26 pm; edited 2 times in total
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 24296
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Thu Dec 24, 2020 5:47 pm    Post subject: Reply with quote

yup, I've seen that a bunch now. I'll send my bad BA boards to you next week.
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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Thu Dec 24, 2020 6:45 pm    Post subject: Reply with quote

Curt Palme wrote:
yup, I've seen that a bunch now. I'll send my bad BA boards to you next week.

Cool Curt. You’ll get your special dealer pricing of course. Just let me know when you send them out with tracking.

craigr

_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 24296
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Thu Dec 24, 2020 6:58 pm    Post subject: Reply with quote

I don't need them back, keep them for parts. Smile

I got rid of my G90 test chassis last month, so I have nothing here for G90s, save for some boards that I'll get rid of over the holidays. They're all yours. Smile
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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Thu Dec 24, 2020 7:01 pm    Post subject: Reply with quote

Curt Palme wrote:
I don't need them back, keep them for parts. Smile

I got rid of my G90 test chassis last month, so I have nothing here for G90s, save for some boards that I'll get rid of over the holidays. They're all yours. Smile

Even better. Thanks Curt Cool

Happy holidays!
craigr

_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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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AnalogRocks
Forum Moderator



Joined: 08 Mar 2006
Posts: 26690
Location: Toronto, Ontario, Canada

TV/Projector: Sony 1252Q, AMPRO 4000G


PostLink    Posted: Thu Dec 24, 2020 7:19 pm    Post subject: Reply with quote

Hmmm maybe I should buy a BA and YA board off you Craig. Then all I would need is the rest of the projector to go with it lol

I've seen those lines before and he did capture that well on video.

Wonder if this happens on the 1292's?

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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Fri Dec 25, 2020 12:51 am    Post subject: Reply with quote

Well, if you buy those two parts I’ll throw in the test of the projector Laughing

It’s just noise and as the caps degrade with time and the power regulators grow old with usage and age I’d say that kind of noise can work it’s way into about any analog device. The thing is whether or not it’s perceivable, and in this case it very much is. One thing the G90 has always had working against it is its tremendous complexity. More places for noise to be generated and also more paths for noise to get into the video signal. There are more than half a dozen power regulators on the BA alone.

craigr

_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Sat Jan 15, 2022 5:10 pm    Post subject: Reply with quote

Just want to give this thread a bump because I have been doing a lot of G90 BA boards lately. Just want to remind those of you on the fence that there really is a need for this now on the G90's and the visual improvement is very noticeable.

This is a very labor intensive job though and my time is even more scarce than before. I have raised the original price to rebuild the BA boards from $350 to $395 plus shipping and any money transfer fees if applicable (ACH, check, and cash have no fees).

craigr

_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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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RickNa




Joined: 04 Mar 2010
Posts: 45
Location: Rome, NY


PostLink    Posted: Wed Feb 16, 2022 9:12 pm    Post subject: Reply with quote

These post are pretty old, are you still rebuilding these boards? I've had the issue you describe for quite awhile now on my G90. Let me know! I have another issue I need to resolve though with color being wrong but I want to try to see if it occurs from all sources. Thanks!
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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Wed Feb 16, 2022 9:19 pm    Post subject: Reply with quote

RickNa wrote:
These post are pretty old, are you still rebuilding these boards? I've had the issue you describe for quite awhile now on my G90. Let me know! I have another issue I need to resolve though with color being wrong but I want to try to see if it occurs from all sources. Thanks!

Yup, I just bumped this thread a couple weeks ago to make it visible again. I've been doing a lot of these rebuilds lately.

Just shoot me an email: craigr@cir-engineering.com

craigr

_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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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Dancrt




Joined: 16 Sep 2017
Posts: 69



PostLink    Posted: Wed Feb 16, 2022 11:30 pm    Post subject: Reply with quote

Hi Craig can you check your email
Please I sent you a private message in this forum
6 months ago and emailed maybe it’s in you spam
It’s still in outbox in forum so unread ?
Can you check spam Folder and I remailed you just then
I got the main stuff from you two years ago but there
Was the last thing
thanks dan
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CIR Engineering




Joined: 25 Aug 2008
Posts: 4264
Location: Chicago USA & Berlin Germany


PostLink    Posted: Wed Feb 16, 2022 11:38 pm    Post subject: Reply with quote

Sorry. Just wrote a quick reply to your email. I'll get you taken care of tomorrow.
_________________
*NEW JETI 1501-HiRes 2nm Spectroradiometer
JETI 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Colorimeter
X-Rite i1Pro2 Spectroradiometer & Spyder Colorimeters *For JVC auto-calibration when Klein & Jeti are not applicable
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion ColourSpace XPT Version β Color Calibration Software
Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
*NEW 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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