Forum: Reliability & Maintainability Questions and Answers

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Posted by: Richard Smith (atari_400@hotmail.com )
Date posted: Thu Jun 21 13:19:01 US/Eastern 2001
Subject: Failure Rates for Active Matrix LCDs and Cold Cathode Backlight
Message:
Hello there,
I am looking for failure rate information for active matrix LCD panels, and also for cold cathode backlights (Airborne Inhabited Fighter envrionment if possible, but not necessary). If anybody can suggest a suitable data source (or better still email me a failure rate) I would greatly appreciate it. Thanks in advance, Richard.

Replies: (list all replies)
LCD Display Reliability
Bruce Dudley Thu Jun 21 14:44:51 US/Eastern 2001
Hot and Cold Cathodes
Bruce Dudley Wed Jun 27 12:07:00 US/Eastern 2001

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Posted by: Kevin Silke
Date posted: Wed Jun 20 12:48:40 US/Eastern 2001
Subject: Power Inductor Derating
Message:
Derating criteria for inductors seems to vary depending on who's doing the derating and their reference guidelines, except that they all seem to include temperature as a criterion. So my question is if you have multiple derating criteria (say current and temperature) and you don't satisfy the first criterion but you do satisfy the temperature criterion, are you adequately derated?

Replies:
Derating Inductors
Bruce Dudley Thu Jun 21 13:47:16 US/Eastern 2001

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Posted by: Diane Gordon (info@reliability.com )
Organization:Reliability Center, Inc.
Date posted: Wed Jun 20 10:48:49 US/Eastern 2001
Subject: Reliability of Elevator Parts
Message:
Does anyone know of any resources to find information about the reliability of elevator parts?

Replies:
Elevator Part Reliability
Bruce Dudley Thu Jun 21 12:49:09 US/Eastern 2001

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Posted by: Juan Ignacio Herce Moreno (Juan_Ignacio_Herce_Moreno@msl-vlc.com )
Organization:Manufacturers' Services Limited
Date posted: Wed Jun 20 4:24:57 US/Eastern 2001
Subject: Estimated MTBF from Heat Shock Test
Message:
How can I estimate the MTBF of an integrated digital component that has performed 1000 cycles of heat shock test? (1 cycle = 30 min. at 90C and 30 min at -40C)
Thanks.

Replies:
Thermal Cycle Reliability
Bruce Dudley Thu Jun 21 16:20:59 US/Eastern 2001

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Posted by: Colin Coombes (colin.coombes@hydro.com.au )
Organization:Hydro Tasmania
Date posted: Mon Jun 18 1:34:03 US/Eastern 2001
Subject: Transformer Oil Furan Analysis
Message:
I would like to know how some other people assess their Furan level results ie, which of the furans indicate what conditions are occurring inside the transformer? what is considered the level of interest/concern/action required? Is certain level of variation in results between routine testing of particular concern?

Replies:
Transformer Furan Levels
Bruce Dudley Thu Jun 28 14:24:49 US/Eastern 2001

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