JUKI LK-1900B series Engineer's Manual

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WARNING :
When it is necessary to open the control box containing electrical parts, be sure to turn the power off and wait for ve minutes or more before opening the cover in
order to prevent accident leading to electrical shock. If the work is performed while the power is ON, never touch other than necessary parts.
Trouble Cause (1) Cause (2) Check and corrective measures
From the previous page
1-B) The origin signal can not be
detected.
Check the connection of CN71 of the machine head INT board.
If there is no problem in connections, replace the origin sensor
or machine head INT board.
8. When turning ON the READY
key, error E927 appears.
8-1) The Y-feed motor can not be
carried out the origin retrieval.
1-A) The motor does not rotate. Check the connection of CN43 of the MAIN board.
If there is no problem in connections, replace the MAIN board.
Check the resistance value of the Y-feed motor.
If there is a problem with the resistance value, replace the
Y-feed motor.
Check the feeding mechanism in Y-direction whether there is
an overload.
If there is a problem with the mechanism, remove the cause of
overload.
1-B) Failure of the encoder signal Check the connection of CN76 of the machine head INT board.
If there is no problem in connections, replace the Y-feed motor
or machine head INT board.
9. When turning ON the READY
key, error E926 appears.
9-1) The X-feed motor can not be
carried out the origin retrieval.
1-A) The motor does not rotate. Check the connection of CN42 of the MAIN board.
If there is no problem in connections, replace the MAIN board.
Check the resistance value of the X-feed motor.
If there is a problem with the resistance value, replace the
X-feed motor.
Check the feeding mechanism in X-direction whether there is
an overload.
If there is a problem with the mechanism, remove the cause of
overload.
1-B) Failure of the encoder signal Check the connection of CN75 of the machine head INT board.
If there is no problem in connections, replace the X-feed motor
or machine head INT board.

JUKI LK-1900B series Specifications

General

Brand	JUKI
Model	LK-1900B series
Category	Sewing Machine
Language	English