DOM MB Diagnosis page

Board ID:

Rev 5.0 SN 0517

Source:

From STF testing crew August 3, 2004

Symptoms:                            

Fails Local Coincidence Loopback tests

Analyst(s):

G. Przybylski

Analysis Procedure(s):

Ran lctestboth in loop. Discovered faulty waveform at Z1-1. 
Lifted T1-3, and installed dummy load on Z1-1. Ran lctestboth in loop. Identified faulty waveform on Z1-1.
Removed and tested Z1. Found apparent open circuit at pin 1.
Replaced Z1 with new, and ran room temperature STF: fully functional.

Root cause:

Faulty power splitter

Mitigation:

Removed and replaced faulty part.

Disposition:

Mainstream this board.

Any Other Information:

Travler