JUKI LK-1900A, Руководство инженера, Страница: 98 / 124

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3-5) Inadequate adjustment of the Adjust the X sensor position correctly.
X sensor position
3-6) Inadequate adjustment of the Adjust position of the Y slit plate correctly.
Y slit plate
4. Sewing machine locked 4-1) Large needle compared with Replace the needle hole guide.
the hole diameter of the needle
hole guide
5. Severe vibration 5-1) Inadequate crank balancer Define the correct crank balancer position.
positioning
6. Malfunction of vertical movement 6-1) Looseness of thread trimmer Define the thread trimmer cam position and fix the cam.
of work clamp foot cam screw
6-2) Presser pulse motor malfun- 2-A) Defective the presser pulse Replace the presser pulse motor.
ction motor.
2-B) The presser pulse motor is Check the connector connections.
wrongly connected.
6-3) Defective circuit board 3-A) Circuit board programming Replace the circuit board.
flaw.
3-B) Connector connections are Check the connector connections.
wrongly made.
Trouble Cause (1) Cause (2) Check and corrective measures
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