Brother LK3-B430E Mark II Service Manual page 73

3. Sewing operation
• The power lamp is not lit, and nothing operates.
• Machine operation is unstable.
• The power lamp is not lit, and nothing operates.
• Machine operation is unstable.
• The feed mechanism does not operate.
• The work clamp lifter mechanism does not operate.
• Error E-61 is displayed.
• Error E-A0 is displayed.
• The machine motor does not run.
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error E-20 is displayed.
• Error E-50 is displayed.
• The machine motor does not run.
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error E-20 is displayed.
• Error E-50 is displayed.
• The machine motor does not run.
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error E-20 is displayed.
• Error E-50 is displayed.
• The machine motor does not run.
• Motor operation is unstable.
• Needle up stop position is not correct.
• Error E-20 is displayed.
• Error E-50 is displayed.
Problem
LK3-B430E Mark II
10. ELECTRIC MECHANISM
Connector No. and position
Power supply circuit board
Conversion transformer
Power sup-
ply switch
Power supply circuit board
Main circuit board
Power supply circuit board
Main circuit board
Power supply circuit board
Main circuit board
Main circuit board
Synchro-
nizer
Main circuit board
Machine
motor
66