JUKI LK-1910 Engineer's Manual page 5

(3) Tension controller No. 3 (Pneumatic type) ................................................................... 131
1) Installing the tension controller No. 3 (B50192220B0) ................................................................................. 131
2) How to use the tension controller No. 3 ....................................................................................................... 135
(4) Disk floating device for basting stitch .......................................................................... 137
1) Installing disk floating device ........................................................................................................................ 137
2) How to use disk floating device .................................................................................................................... 137
15. TABLE OF ERROR INDICATION ( LK-1910, 1920) ..................................... 139
16. ERROR MESSAGE TABLE (LK-1930) ......................................................... 140
17. POWER SWITCH CONNECTION DIAGRAM ............................................... 142
(1) For 3-phase 200, 220 and 240V ...................................................................................... 142
(2) For single-phase 100V, 110V, 120V, 200V, 220V and 240V .......................................... 142
(3) For 3-phase 220V, 240V, 380V, 400V and 415V ............................................................ 143
(4) For single-phase 220V, 240V, 380V, 400V and 415V .................................................... 144
18. CONNECTION OF THE POWER PLUG ....................................................... 145
(1) Overseas market : 100V series, 200V series ................................................................ 145
(2) Overseas market : 380V series ...................................................................................... 146
19. CHANGE OF THE POWER VOLTAGE ........................................................ 147
(1) Change of the voltage from 100 to 240 V ...................................................................... 147
(2) Change of the voltage from 220 to 415 V ...................................................................... 147
20. MAINTENANCE AND INSPECTION ............................................................. 148
(1) Replacing the printed circuit boards ............................................................................. 148
1) MAIN circuit board ........................................................................................................................................ 148
2) SERVO circuit board .................................................................................................................................... 148
3) PMDC circuit board ...................................................................................................................................... 148
4) POWER circuit board ................................................................................................................................... 149
21. TROUBLES AND CORRECTIVE MEASURES ............................................. 150
(1) Mechanical parts ............................................................................................................. 150
(2) With regard to sewing ..................................................................................................... 152
(3) Electrical parts (Also, refer to Block diagram.) ............................................................ 159
22. CURCUIT DIAGRAM ..................................................................................... 166
(1) Block diagram (LK-1910, 1920) ...................................................................................... 166
(2) Block diagram (LK-1930) ................................................................................................ 167
(3) Power circuit diagram A (LK-1910, 1920) ...................................................................... 168
(4) Power circuit diagram A (LK-1930) ................................................................................ 169
(5) Power circuit diagram B (LK-1910, 1920) ...................................................................... 170
(6) Power circuit diagram B (LK-1930) ................................................................................ 171
(7) Head sensor circuit diagram .......................................................................................... 172
(8) Solenoid valve circuit diagam ........................................................................................ 173
(9) Solenoid circuit diagram ................................................................................................ 174
(10) Stepping motor circuit diagram ................................................................................... 175
(11) Pedal switch circuit diagram ........................................................................................ 176
(12) 3-step PK pedal circuit diagram .................................................................................. 177
(13) Servo motor circuit diagram ........................................................................................ 178
(14) Pneumatic system circuit diagram .............................................................................. 179
23. DRAWING OF THE TABLE .......................................................................... 180
(1) LK-1910, 1920 .................................................................................................................. 180
(2) LK-1930 ............................................................................................................................ 181