"One of these units appears to have an onboard temp sensor that is dead - the temp just reads -55.0C all the time. This is the little Maxim/DallasDS1620 chip, which I can replace, but I had a few questions first." ++++++++++++++++++++++++
I've had about 50 Thunderbolts and at least 5 of them had a defective DS1620 chip. About 3 more were from late 2004 or early 2005 and had the "E" revision chip that displays the temp in about 3/4 degree steps. Of the ones that failed the common failure mode was to display -54.999 degree C even though I'm sure it wasn't quite that cold in my shop. ;-) If you replace the chip just make sure that the replacement chip is a "D" or "C" revision if you want the Lady Heather graph to look nice. -Arthur _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
