JUKI LK-1942ZA5050, Instruction Manual And Parts List

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viii
CONTENTS
I. SPECIFICATIONS ........................................................................................1
II. CONFIGURATION ......................................................................................2
1. Configuration of main unit ..................................................................................................2
2. Configuration of the indication box ...................................................................................2
3. Configuration of needle thread heat cutter unit ...............................................................3
4. Configuration of bobbin thread heat cutter unit ...............................................................3
III. INSTALLATION ..........................................................................................4
IV. PREPARATION OF THE DEVICE .............................................................5
1. Lubrication ...........................................................................................................................5
2. Threading the machine head ..............................................................................................6
V. OPERATION OF THE DEVICE ...................................................................7
1. Item data setting ..................................................................................................................7
2. Checking the contour of a sewing pattern ........................................................................9
3. Sewing ..................................................................................................................................9
4. Notes on creating a sewing pattern .................................................................................10
5. Notes on changing the memory switch ...........................................................................10
6. Replacement of bobbin .....................................................................................................11
(1) How to replace the bobbin thread .................................................................................................... 11
(2) How to replace the bobbin thread using the bobbin thread counter ................................................ 11
VI. MAINTENANCE .......................................................................................12
1. Adjusting the needle thread heat cutter unit position ...................................................12
2. How to replace the heat wire ............................................................................................12
3. Adjusting the bobbin thread heat cutter unit position ...................................................13
4. Bobbin case loading detecting device ............................................................................14
(1) Adjusting the sensor .........................................................................................................................14
(2) Position of the bobbin case holder positioning finger .......................................................................14
5. Detection of stitch skipping and detection of no bobbin-thread ..................................14
6. Adjusting the sensitivity of sensors ................................................................................15
7. Wiper ...................................................................................................................................15
8. Thread hauler .....................................................................................................................15
VII. SETTING OF THE DEVICE ....................................................................16
1. List of setting items ...........................................................................................................16
2. Setting procedure ..............................................................................................................16
VIII. LIST OF ERRORS .................................................................................17
1. Reading the error indication .............................................................................................17
2. List of error codes .............................................................................................................17
(1) List of error codes for the device ......................................................................................................17
3. List of error codes for the sewing machine ....................................................................18
4. Application of grease ........................................................................................................19
5. Thread heat cutter unit timing chart for LK .....................................................................20
(1) Thread heat cutter unit timing chart 1 for LK ....................................................................................20
(2) Thread heat cutter unit timing chart 2 for LK ....................................................................................21
6. Thread heat cutter unit flow chart for LK ........................................................................22
(1) Thread heat cutter unit flow chart 1 for LK .......................................................................................22
(2) Thread heat cutter unit flow chart 2 for LK .......................................................................................23
IX. PARTS NUMBER OF UNITS ...................................................................24
X. LIST OF REPLACEMENT PARTS ...........................................................26
XI. OVERALL WIRING DIAGRAM ...............................................................28