JUKI LK-1900B series Engineer's Manual

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6. Check program ............................................................................................................................ 84
(1) Starting the Check program ...................................................................................................................................... 84
(2) Input signal check ...................................................................................................................................................... 85
(3) X/Y motor origin adjustment ...................................................................................................................................... 86
(4) Continuous operation ................................................................................................................................................ 87
(5) Main motor rpm check ............................................................................................................................................... 88
(6) Output check ............................................................................................................................................................... 88
(7) Work clamp foot/thread trimming motor origin adjustment ................................................................................... 89
(8) Needle thread clamp motor origin adjustment ......................................................................................................... 90
7. Miscellaneous .............................................................................................................................. 91
(1) Various printed wiring boards ................................................................................................................................... 91
(2)Tableofbar-tackingstandardpatternspecications ............................................................................................. 96
(3) Table of standard patterns ......................................................................................................................................... 97
8. Sub-class information ................................................................................................................. 99
(1)Modelsclassiedbybuttonsizes(LK-1903B) ......................................................................................................... 99
(2)TableofStandardPatterns(LK-1903B) .................................................................................................................. 100
(3) Option (LK-1900BB,1903BB,1900BNB,1903BNB) ............................................................................................... 100
9. Optional features ....................................................................................................................... 101
(1) Table of optional parts ............................................................................................................................................. 101
(2) Connection of the optional pedal ............................................................................................................................ 103
(3)Connectionofthemagnetwiper(cannotbeconnectedwithLK-1901B) ............................................................ 107
(4) Connection of the pause switch .............................................................................................................................. 107
(5) Connection of the marking light .............................................................................................................................. 108
(6) Connection of the needle cooler (turns ON while machine is running) .............................................................. 109
(7) Table of the work clamp foot ................................................................................................................................... 110
10. Maintenance ............................................................................................................................... 112
(1) Replacing the fuse .................................................................................................................................................... 112
(2)100Vspecicationchangeover ............................................................................................................................... 112
(3) Greasing parts .......................................................................................................................................................... 113
(4) Parts to which grease is applied ............................................................................................................................. 114
(5)Grease-upproceduresforthespeciedposition .................................................................................................. 122
11. Error list ...................................................................................................................................... 123
12.Troublesandcorrectivemeasures .......................................................................................... 128
(1) Mechanical parts ....................................................................................................................................................... 128
(2) Sewing conditions .................................................................................................................................................... 130
(3) Electrical components ............................................................................................................................................. 139
13. Circuit diagrams ........................................................................................................................ 147
(1)Blockdiagram_Standardspecication(MC-670) .................................................................................................. 147
(2) Blockdiagram_LK-1900BB,1903BB(MC-672) ......................................................................................................... 148
(3) Blockdiagram_NFCType(MC-672) .......................................................................................................................... 149
(4) Powersupplycircuitdiagram(Single-phase) ......................................................................................................... 150
(5)Powersupplycircuitdiagram(Single-phaseCE) .................................................................................................. 151
(6)Powersupplycircuitdiagram(3-phase) ................................................................................................................. 152
(7)Servomotorcircuitdiagram .................................................................................................................................... 153
(8) Stepping motor circuit diagram .............................................................................................................................. 154
(9) MAIN · Operation panel circuit diagram ................................................................................................................. 155
(10) Machine head sensor circuit diagram .................................................................................................................... 156
(11)Aircircuitdiagram(LK-1900BBand1903BBonly) ............................................................................................... 157
(12)PneumaticcircuitdiagramforLK-1900BB ............................................................................................................ 157
14. Table drawings ........................................................................................................................... 158
(1)TabletypeforlongitudinalInstallation ................................................................................................................... 158
(2)TabletypeforlateralInstallation ............................................................................................................................. 159

JUKI LK-1900B series Specifications

General

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