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11. ELECTRICAL MECHANISM
Z-8550A, 8560A
99
Problem No. 4, 5, 6, 7
Needle bar does not move to the home position and an error code is displayed when the
power switch is turned on.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. When [Err 200] is displayed:
• Needle zigzag motor cannot
move to home position
• Encoder cord of needle zigzag
motor is not connected.
Check that connector P3 (ENC) is inserted into
the main P.C. board.
Encoder P.C. board in needle
zigzag motor
1) Check if there is too much or too little
needle zigzag sliding resistance. (Check if
there is variation in the load.)
2. When [Err 201] is displayed:
Problem with needle zigzag motor
or problem with sliding resistance
2) Adjust the sliding resistance within the
range of 1.2 kgf to 1.5 kgf.
-
3. When [Err 202] is displayed:
Problem with home position
adjustment data for needle zigzag
motor
Check the home position adjustment. -
4. When [Err 711] is displayed:
Abnormal current detected in needle
zigzag motor
(Replace the part(s) indicated at right.) PMD P.C. board
Problem No. 8, 9
Sewing machine motor does not operate and an error code is displayed when treadle is
depressed forward.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1. When [Err 50] is displayed:
Sewing machine safety switch
operation detected
Adjust the operation of the safety switch.
(Check the gap between the sewing machine
and the table.)
-
2. When [Err 130] is displayed:
Sewing machine motor does not
operate
Check that the sewing machine motor cord is
inserted into the side of the control box.
Power supply P.C. board or
main P.C. board
Problem No. 10
Sewing machine motor operates but an error code is displayed when the treadle is depressed
forward.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
When [Err 132] is displayed:
Problem with A phase encoder signal
of sewing machine motor
(Replace the part(s) indicated at right.) Motor or encoder P.C. board