DOM MB V5 Diagnosis page

Board ID:

V5 00625

Source:

Michael Harris

Symptoms:                            

Light output of "no-light" level matches light output of max light settings.

Analyst(s):

G. Przybylski

Analysis Procedure(s):

DAC control voltage to U6 OK. 
Enabling the LED subsystem crashes the board.    Suspect internal or external short from U6-1 to GND

Root cause:

Internally shorted component, or solder bridge under U6.

Mitigation:

Replace U6

Disposition:

Mainstream

Any Other Information:

Traveler

Power Failure Waveforms