Brother XR9000 Service Manual page 130

Failure Investigation
for Electronic Parts
Is the presser foot lever down?
Are the resistance values for the PF
switch assy. normal?
• PF switch assy. resistance values
When switch is pressed : 1Ω or less
When switch is not pressed : 1MΩ
(In the case of abnormal, when press
the start/stop button, "E1" is displayed.)
Replace the main PCB assy.
Replace the power supply PCB assy.
Replace the main motor.
Main motor does not turn
From previous page
Y
Y
or
or
N
Lower the presser foot lever.
N
Replace the PF switch assy.
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