DOM MB V5 Diagnosis page

Board ID:

V5 000640

Source:

Azriel Goldschmidt

Symptoms:

09/09 LED Max Light unexpectedly low.
10/27 At low temperatures, fails ATWD A Ch 2 Baseline test

Analyst(s):

G. Przybylski

Analysis Procedure(s):

09/09 U6 output does not change with controlling input..
Profile at low temperatures. See traveler
Map out low temperature performance profile from -40°C to -75°C

Root cause:

09/09 U6 faulty, or U6 soldering faulty.
10/27 None located

Mitigation:

09/09 Recommend replacing U6
10/27 pass by fiat

Disposition:

Replace faulty component, U6.  Retest
Pass by fiat, after collecting cold performance data.
Route to Europe only to insure that it cannot be assembled into an IceTop DOM.

Any Other Information:

Traveler October 27
Traveler September 9