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Is this IC421 chip in my G90 OK?

 
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nateduffer



Joined: 07 Feb 2013
Posts: 10
Location: WA, USA

TV/Projector: Sony VPH-D50HT, Runco DTV1100 and DTV933, Sony G90


PostLink    Posted: Sun Mar 10, 2013 3:11 am    Post subject: Is this IC421 chip in my G90 OK? Reply with quote


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I have attached a photo of the highly discussed Dallas and IC421 chips on my YA board. The chip labeled IC421 does not seem to have the risky lot number that I've been reading about. It appears to be 836A01E. Is that right? Am I looking in the right place?

Also, a point of interest is that the black plastic shell of the Dallas chip is bulging slightly on the end with the logo. Is that normal?

I wonder if these YA boards run hot?

All the expert advice and information you guys share in this forum is greatly appreciated.

N



IC421-Dallas.JPG
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IC421-Dallas.JPG


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Phoenixed



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


PostLink    Posted: Sun Mar 10, 2013 5:11 am    Post subject: Reply with quote

Have you booted up your g90 yet?
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CIR Engineering



Joined: 25 Aug 2008
Posts: 3880
Location: Chicago USA & Berlin Germany


PostLink    Posted: Sun Mar 10, 2013 6:08 am    Post subject: Reply with quote

Your IC421 is out of a good lot and will never fail.

Don't run your G90 with your Dallas chip like that. It may strike the tubes and ruin them. If you want the Dallas chip data tested, and if good copied to a new chip, you may pull it and send it to me to duplicate. Email me for details.

craigr

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nateduffer



Joined: 07 Feb 2013
Posts: 10
Location: WA, USA

TV/Projector: Sony VPH-D50HT, Runco DTV1100 and DTV933, Sony G90


PostLink    Posted: Sun Mar 10, 2013 9:06 am    Post subject: Reply with quote

I only ran it briefly to check the hours and verify that it functioned after transport. After that I decided to leave it unplugged until I have a chance to learn all I can here, and until I replace the red c-element. (This projector is the subject of the "Scary" topic)

That's great news about the IC421, Craig. Thanks. I will email you about the Dallas chip. Thanks to information you guys have shared in this forum, I found out about these chips before watching a really 'bad' movie.

Nate
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CIR Engineering



Joined: 25 Aug 2008
Posts: 3880
Location: Chicago USA & Berlin Germany


PostLink    Posted: Sun Mar 10, 2013 3:56 pm    Post subject: Reply with quote

Got your email and just sent one back.

It's ok to have the projector in standby, but don't power up the projector at all with that Dallas chip. If the Dallas chip data becomes corrupt, the tubes may instantaneously get struck (ruined) without any warning what so ever. Literally, it will happen before you even know that it has happened and there will be no warning signs.

craigr

_________________
JETI Specbos 1211 Spectroradiometer
Photo Research PR-650 Spectroradiometer
Klein K10-A Laboratory Grade Colorimeter
Murideo Fresco SIX-G HDMI 2.x Multimedia Generator
Murideo Fresco SIX-A HDMI 2.x Analyzer
*NEW Light Illusion LightSpace XPT Pro Version 10.x Color Calibration Software
ChromaPure3 Pro Color Calibration Software
Sencore CR7000 CRT Tube Analyzer / Rejuvenater
Audyssey MultEQ Pro Audio Calibration System
Authorized Dealer for Lumagen & just about everything else Wink
www.CIR-Engineering.com - craigr@cir-engineering.com
Phone: 865-405-6892
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Clarence



Joined: 08 Mar 2006
Posts: 3609
Location: Northern Virginia


PostLink    Posted: Thu Apr 04, 2013 1:17 am    Post subject: Re: Is this IC421 chip in my G90 OK? Reply with quote

nateduffer wrote:
The chip labeled IC421 does not seem to have the risky lot number that I've been reading about. It appears to be 836A01E.


That's the same lot number as mine...

SONY
CXD305
-127R
836A01E



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