DOM MB V5 Diagnosis
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Board ID:
V5.0L 000465
Source:
Azriel Goldschmidt
Symptoms:
High power consumption
Fell on floor.
Analyst(s):
G. Przybylski
Analysis Procedure(s):
August 9: Reload CPLD and Flash. STF test
still shows high +5V current. (typical 480; 654 is anomylous)
No hot spots located with IR detector.. Booted at -35°C
to +60°C
August 11: Board fell to floor from approximately three feet.
Delay board edge damaged. Some foil is pealed up. Replace Delay board.
Ran low temperature, -40°C to -75°C
results: (12/8/04)
Local Coincidence loop-back test fails at and below -65°C.
Pressure test fails at -75°C
U8 inspection OK.. No particularly suspicious solder joints observed.
Root cause:
The standard boot-race condition involving the CPLD.
Mitigation:
Install CPLD firmware, and replaced physically damaged delay card.
Disposition:
Mainstream, if needed.
Any Other Information:
Traveler August 9
Traveler August 11