The Workspace Does Not Light - Brother CS8000 Series Service Manual

Failure Investigation for Electronic Parts The workspace does not light.
The workspace lamp does not light.
Are the operate PCB assy. and LED
lamp SR assy. correctly connected?
Are the main PCB assy. and LED
lamp SL assy. correctly connected?
Are the main PCB assy. and opetate
PCB assy. correctly connected?
Is the voltage across pins 4-3 of
the
connector 26V DC?
5 - 16
Y
Y
Y
power PCB assy. output
Y
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N
Reconnect the operate PCB assy.
and LED lamp SR assy. correctly
N
Reconnect the main PCB assy.
and LED lamp SL assy. correctly
N
Reconnect the main PCB assy.
and operate PCB assy. correctly
N
Replace power PCB assy.