DOM MB V5 Diagnosis
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Board ID:
V5 000131
Source:
Michael Harris
Symptoms:
7/2 (problem report crossed out) Failed to connect
7/23 'Same problem & the current fluctuates too much [30,50]'
9/24 ATWD A Most tests fail
11/05 boot problem reported
Analyst(s):
Thorsten Stezelberger/G. Przybylski
Analysis Procedure(s):
7/2 C112 looks damaned. Power supply voltages low
7/13 5V output low. U23 warm. U23 installed backwards.
9/24 apparently no analysis. See 11/5
11/05 boot problem not observed. Did observe ATWD A pulse failures
traced to slow starting ATWD
Root cause:
7/2 Replaced C112 by loading vendor. Trouble sheet never
finished off.
7/23 Faulty loading by vendor
11/05 Replace ATWD B and mainstream
Mitigation:
Replace mismounted U23
Replaced damaged C112
Reduce bad ATWD
Disposition:
Test, and mainstream
Any Other Information:
Traveler July 2
Traveler July 11
Traveler September 24
Traveler November 5
Parts