DOM MB V5 Diagnosis
page
Board ID:
V5 00206
Source:
Michael Harris
Symptoms:
High power consumption when attempting to load firmware & software
Analyst(s):
G. Przybylski
Analysis Procedure(s):
With ohm-meter, measure 100 ohms
across line input terminals. Lift B28; measured 100 ohms across
DC-DC converter side. Removed bottom power supply cover shield. Removed
C142. "Short" gone. Measured 100 ohms across C142.
Loaded CPLD. Loaded configuration memory. Board does not
config-boot. Loaded flash via JTAG OK. Monitor flash boot
at serial port... Noted 5 dots, but no boot version message. Set
aside for further debugging when time permits.
Noted solder flux not cleaned from power supply terminals, and top
shield, before installation of bottom shield. See pix below.
Root cause:
Faulty component
Mitigation:
Repair; further diagnosis required.
Disposition:
TBD
Any Other Information:
Traveler
July 28
Additional information
Oblique view is best for showing up the solder flux residue which is
clearly obvious to the eye.
