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Z phase detection error
Detection of the upper dead point of the
Turn OFF the power switch and check whether
sewing machine cannot be performed.
CN14 of SDC circuit board is disconnected
or loose.
Presser foot and thread
Presser foot and the thread trimmer is not
Turn OFF the power switch and check whether
trimmer position error
in the proper position.
CN66 of INT circuit board is discoonected
or loose.
Needle tread clamp
The needle thread clamp device is not in
Turn OFF the power switch and check whether
position error
the proper position.
CN65 of INT circuit board is disconnected
or loose.
Encoder trouble A
Encoder A or B phase cannot be detected.
Turn OFF the power switch and check whether
Cn14 is loose or disconnected.
Encoder trouble B
Encoder U, V or W phase connot be
Turn OFF the power switch and check whether
detected.
CN14 is loose or disconnected.
Reverse rotation motor
The motor is reversing.
Turn OFF the power switch and check whether
coupling of the main motor is loose.
Overvoltage error
Power source voltage is beyond the
Check the power source voltage.
specified value.
Low voltage error
Power source voltage is short.
Check the power source voltage.
Motor driver trouble
Error from the motor driver is detected.
Turn OFF the power switch and turn ON the
power switch again after some time..
Stepping motor power
Power source of the stepping motor is not
Turn OFF the power switch and check F1
Check the cause of blown-
source trouble
output.
fuse of SDC circuit board.
out of the fuse.
Solenoid power source
Power source of the solenoid is not output.
Turn OFF the power switch and check F2
Check the cause of blown-
trouble
fuse of SDC circuit board.
out of the fuse.
SDC circuit board
Overheat of SDC circuit board
Turn OFF the power switch and turn ON the
overheat
power switch again after some time.
MAIN circuit board
Overheat of MAIN circuit board
Turn OFF the power switch and turn ON the
overheat
power switch again after some time.
X origin retrieval error
X origin sensor does not change.
Turn OFF the power switch and check whether
CN62 of INT circuit board or CN42 of MAIN
circuit board is disconnected or loose.
Indication
Name of error
Description of error
Corrective measure
Remarks
Summary of Contents for LK-1900A
Page 20: ... 16 10 Hook adjustment Standard Adjustment 0mm 0mm 7 5mm 0 05 0 1mm For DPX5 For DPX17 ...
Page 90: ... 86 Grease Grease Grease Grease Grease 8 Needle thread clamp mechanism area ...
Page 91: ... 87 Grease Grease A Grease Grease Grease Grease 9 LK 1901A relations ...
Page 92: ... 88 10 LK 1903A relations Grease Grease ...
Page 114: ... 111 12 Circuit diagrams 1 Block diagram A ...
Page 115: ... 112 2 Power supply circuit diagram A ...
Page 116: ... 113 3 Power supply circuit diagram B ...
Page 117: ... 114 4 Power supply circuit diagram C ...
Page 118: ... 115 5 Servo motor circuit diagram ...
Page 119: ... 116 6 Sensor pedal VR circuit diagram ...
Page 120: ... 117 7 MAIN PANEL board circuit diagram ...
Page 121: ... 118 8 Motor solenoid circuit diagram Thread trimmer Lifting the work clamp foot motor ...