DOM MB Diagnosis page
Board ID:
Rev 5.0 SN 0267
Source:
From STF testing crew
Symptoms:
Fails Local Coincidence Loopback
tests
Boot failures at high temperatures during burnin.
Analyst(s):
G. Przybylski
Analysis Procedure(s):
Ran lctestboth in wait loop. Noted
anomylous waveform at T3-3.
Lifted lead T3-3, and terminated Z2.1. Anomylous waveform
persists. Z2 appears to be bad.
Z2 removed, tested externally, and found to be bad.
Ran board in ramp temperature profile (2 hour cycle) with 2 minute
reboots. Verified failure to boot above room temperature.
Replaced oscillator on a hunch; this apparently solves the
problem. 10/25/04 gtp
Root cause:
Z2 pin 1 appears to be
disconnected internally.
Probable faulty oscillator module.
Mitigation:
Replace Z2. Run complete suite of
STF tests at room temperature with 100% success.
Replace faulty oscollator.
Disposition:
Sent to Helen for clean-up.9/8/04
Mainstream
Any Other Information:
Travler (Z2)
Travler (Y1)