DOM MB Diagnosis page

Board ID:

Rev V5.0L 000567

Source:

Loading vendor identification

Symptoms:                            

Questionable formulation or treatment of solder mask causing localized discoloration.

Analyst(s):

G. Przybylski

Analysis Procedure(s):

By fiat, DOM MBs with anomalous solder mask will not be deployed.
Load CPLD; Load Configuration memory; load Flash memory.
Run complete room temperature STF suite;  no failures observed.
Low temperature profile from -40°C to -75°C Results:
Local Coincidence failure at and below -70°C.   No other failures noted.
During 400 plus cycles of reboot test while sweeping the temperature between -55°C and +65°C every 90 min.,  no boot failures were observed.

Root cause:

Unknown

Mitigation:

The discoloration has been brought to the attention of the loading house and PCB house, who have promised to take precautions to minimize future solder mask problems.
Mark ":not for deployment" and set aside for the software testing crew.

Disposition:

Forwarded to Helen and Azriel for room temperature test and integration test.
Not for integration into IceTop or InIce Optical Modules; software test board.

Any Other Information:

Traveler September 13