wrote in message
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On Tuesday, July 30, 2013 9:52:05 AM UTC-5, Mike Rivers wrote:
On 7/29/2013 6:55 PM, wrote:
Replace a chip, maybe?
Replace it with what? Another chip with same problem?
No, another chip that's soldered in by hand and carefully inspected. And
while he's at it, inspect the rest of the board for bad solder joints.
For a good time, call http://mikeriversaudio.wordpress.com
And how bench technician at repair center can "inspect" the chip that has
known intermittent design flaws? Clairvoyance?
If the design flaw is known, then it often relates to a batch of chips that
were made with the same flaw. Chips are made in batches that are essentially
identical. The exterior of the chip can have a batch number, lot number,
date code, some kind of marking that is unique to chips that were made the
same. If you look at a chip it has a number of markings in addition to the
type number and manufacturer's name. Some of them relate to the batch that
the chip is a member of.
Someone in the know sends out a memo with the code number, and the technican
inspects the chip to see if it has that marking.