DOM MB Diagnosis page

Board ID:

Rev 5.0 SN 0168, from builder N, and PCB manufacturer D

Source:

Non-delivered.  Sent to LBL as a non-conforming board.

Symptoms:                            

Anomalous probe station readings around U8, the switching power supply chip

Analyst(s):

G. Przybylski

Analysis Procedure(s):

Disconnect switching power supply output beads to allow measurements without endangering other components.
Measure power supply voltages unloaded.  All OK.
Reconnect beads.  Power up. All voltages OK.

Root cause:

Unknown

Mitigation:

Power up, and test all power supply voltages and currents.  Looks OK.

Disposition:

Reroute back to loading house for hand work and normal delivery as a production board

Any Other Information:

none