Brother Z-8550A Service Manual page 109

Problem No. 11 Error code is displayed while sewing machine is operating.
Cause
When [Err 710] is displayed while
sewing machine is operating:
Abnormal current detected in sewing
machine motor
Problem No. 12 Sewing machine does not stop correctly (needle down stop or needle up stop).
Cause
1. Needle stop position for sewing
machine motor cannot be verified.
2. Stop position for needle zigzag
motor cannot be verified
Inspection/Remedy/Adjustment
(Replace the part(s) indicated at right.)
Inspection/Remedy/Adjustment
Try carrying out the procedures in "3-6.
Checking input and output".
(If the needle zigzag stop position key is on,
stopping will be delayed when 3-step zigzags
are sewn.)
Z-8550A, 8560A
11. ELECTRICAL MECHANISM
Replacement if a malfunction
Power supply P.C. board
Replacement if a malfunction
-
-
100