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11. ELECTRICAL MECHANISM
Z-8550A, 8560A
98
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
5. When [Err 91] is displayed:
Problem with treadle unit settings
Repeat the standard settings for the treadle
unit. (Refer to “12-3. Standard settings for
treadle depression stroke”.)
-
6. When [Err 450] is displayed:
Problem with machine head
memory data; Model selection
cannot be loaded
(Replace the part(s) indicated at right.) Machine head memory unit
7. When [Err 452] is displayed:
Machine head memory cannot be
verified.
Check that connector P6 (HEAD-M) is inserted
into the main P.C. board.
Machine head memory unit
1) Check that connector P31 (PMD) is inserted
into the main P.C. board and that connector
P1 (MAIN) is inserted into the PMD P.C.
board.
Harness, PMD P.C. board,
main P.C. board
8. When [Err 403] is displayed:
Poor connection between main
P.C. board and PMD P.C. board
2) Check if there is a harness short-circuit.
Harness
9. When [Err 401] or [Err 411] is
displayed:
Main P.C. board communication
error
Turn the power switch off and back on again.
Main P.C. board
10. When [Err 700] is displayed:
Abnormal rise in power supply
voltage
Check that the power supply voltage at the wall
outlet is within the range of the specification
voltage +/- 10%.
-
11. When [Err 705] is displayed:
Abnormal drop in power supply
voltage
Check that the power supply voltage at the wall
outlet is within the range of the specification
voltage +/- 10%.
-
12. When [Err 101] is displayed:
DIP switch No. 4 on the main P.C.
board is ON
Set DIP switch No. 4 to OFF and then turn the
power switch off and back on.
-
13. When [Err 200] is displayed:
Needle zigzag motor is not
connected
Check that connector P5 (PMD) is inserted into
the PMD P.C. board.
Needle zigzag motor or PMD
P.C. board
14. When [Err 131] is displayed:
Encoder cord of sewing machine
motor is not connected.
Check that connector P13 (ENC) is inserted
into the main P.C. board.
Sewing machine motor or main
P.C. board
Problem No. 3
“UP” is displayed when the power switch is turned on.
Cause Inspection/Remedy/Adjustment Replacement if a malfunction
1) Turn the pulley to move the needle bar to
the needle up stop position.
Malfunction of encoder P.C. board in
sewing machine motor
2) Check if the needle up signal remains on.
Encoder P.C. board in sewing
machine motor