JUKI LK-1900A Series Engineer's Manual page 95

Indication Name of error
Z phase detection error
Presser foot and thread
trimmer position error
Needle tread clamp
position error
Encoder trouble A
Encoder trouble B
Reverse rotation motor
Overvoltage error
Low voltage error
Motor driver trouble
Stepping motor power
source trouble
Solenoid power source
trouble
SDC circuit board
overheat
MAIN circuit board
overheat
X origin retrieval error
Description of error
Detection of the upper dead point of the
sewing machine cannot be performed.
Presser foot and the thread trimmer is not
in the proper position.
The needle thread clamp device is not in
the proper position.
Encoder A or B phase cannot be detected.
Encoder U, V or W phase connot be
detected.
The motor is reversing.
Power source voltage is beyond the
specified value.
Power source voltage is short.
Error from the motor driver is detected.
Power source of the stepping motor is not
output.
Power source of the solenoid is not output. Turn OFF the power switch and check F2
Overheat of SDC circuit board
Overheat of MAIN circuit board
X origin sensor does not change.
Corrective measure
Turn OFF the power switch and check whether
CN14 of SDC circuit board is disconnected
or loose.
Turn OFF the power switch and check whether
CN66 of INT circuit board is discoonected
or loose.
Turn OFF the power switch and check whether
CN65 of INT circuit board is disconnected
or loose.
Turn OFF the power switch and check whether
Cn14 is loose or disconnected.
Turn OFF the power switch and check whether
CN14 is loose or disconnected.
Turn OFF the power switch and check whether
coupling of the main motor is loose.
Check the power source voltage.
Check the power source voltage.
Turn OFF the power switch and turn ON the
power switch again after some time..
Turn OFF the power switch and check F1
fuse of SDC circuit board.
fuse of SDC circuit board.
Turn OFF the power switch and turn ON the
power switch again after some time.
Turn OFF the power switch and turn ON the
power switch again after some time.
Turn OFF the power switch and check whether
CN62 of INT circuit board or CN42 of MAIN
circuit board is disconnected or loose.
Remarks
Check the cause of blown-
out of the fuse.
Check the cause of blown-
out of the fuse.