Page 2 - SAFETY INSTRUCTIONS; Safety indications and their meanings; CAUTION
i LK3-B438E Mark II Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instruc-tions below and the explanations given in the instruction manual. With industrial sewing machines, it is normal to carry out work while positioned directly in fr...
Page 3 - ii; Environmental requirements; Installation; DANGER
ii LK3-B438E Mark II Use the sewing machine in an area which is free fromsources of strong electrical noise such as high-frequency welders.Sources of strong electrical noise may cause prob-lems with correct operation. Any fluctuations in the power supply voltage shouldbe within ± 10% of the rated vo...
Page 4 - iii; Sewing; Maintenance and inspection
iii LK3-B438E Mark II CAUTION Set the needle to the needle up stop position beforeturning on the power.If this is not done, the wiper may strike the needle,which might cause the needle to break. Turn off the power switch before carrying out cleaning,otherwise the machine may operate if the foot swit...
Page 5 - iv
iv LK3-B438E Mark II Safety devices Eye guardFinger guardThread take-up coverThread take-up solenoid coverBelt coverMotor cover, etc. 2 Moving partsmay cause injury. Operate with safety devices.Turn off main switch before threading, changing bobbin and needle, cleaning etc. 3 Be sure to connect the ...
Page 6 - CONTENTS; CHECKING THE SEWING PATTERN
LK3-B438E Mark II CONTENTS 1. NAME OF EACH PART ............................... 0 1 2. SPECIFICATIONS ......................................... 0 2 2-1. Specifications ....................................... 2 2-2. Program list .......................................... 3 3. INSTALLATION ..............
Page 11 - The following programs require the solenoid thread wiper (OP).
LK3-B438E Mark II 5 2 . SPECIFICATIONS * 2 Do not use the button lifter spring. 36 37 38 39 40 41 42 43 44 No. of button holes 4 Sewing pattern No. of threads 6-6 8-8 10-10 12-12 6-6 8-8 10-10 6-6 10-10 No. of crossover stitches 0 0 0 0 0 0 0 0 0 No. of stitches 26 30 34 38 26 30 34 26 34 Standard s...
Page 12 - • Use the power table which has been specially designed
LK3-B438E Mark II 6 Machine installation should only be carriedout by a qualified technician. Contact your Brother dealer or a qualifiedelectrician for any electrical work that mayneed to be done. The sewing machine head weighs more than47 kg. The installation should be carried outby two or more peo...
Page 23 - POWER; to; is pressed to shown the program
LK3-B438E Mark II 17 5 . OPERATION 5-1 . Name and function of each operation panel item S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series q w re t y u i o !0 !1 !4 q POWER indicator .................. Illuminates when the power switc...
Page 24 - is pressed to shown the speed set-
LK3-B438E Mark II 18 S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series y i o !0 !1 !4 !2 !3 i X-SCALE indicator ................ Illuminates when the SELECT switch y is pressed to shown the X-scale set- t i n g . o Y-SCALE indicator ...
Page 26 - When checking by operating only the feed mechanism
LK3-B438E Mark II 20 1. Turn on the power switch. (The POWER indicator will illuminate and the program number will flash in the display window.) 4. Press the TEST switch. (The TEST indicator will illuminate.) 5. Depress the foot switch to the second step. Only the feed mechanism will move. The feed ...
Page 27 - Loosen the set screw
LK3-B438E Mark II 21 7. CORRECT USE 7-1 . Selecting the needle and thread TQ × 1 #11 TQ × 1 #12 TQ × 1 #14 Thread #60 #50 Button hole diameter 1.5mm or greater 1.6mm or greater 1.7mm or greater Needle q w q w Approx. 40mm [When using the liquid cooling tank] Turn off the power switch before threadin...
Page 29 - -5. Replacing the bobbin case and threading the thread; Thread take-up spring height
LK3-B438E Mark II 23 Turn off the power switch before removing and replacing the bobbin case, otherwise the machinemay operate if the foot switch is depressed by mistake and serious injury could result. q 3 0 m m CAUTION 7-5. Replacing the bobbin case and threading the thread Pull the shuttle race c...
Page 30 - Turn the tension stud
LK3-B438E Mark II 24 7. CORRECT USE Becomegreater Become less q w w q e q Weaker S t r o n g e r 7-6-3 . Thread take-up spring height 7-6-4. Thread take-up spring tension Loosen the set screw q and turn the tensioner body to adjust the thread take-up spring height. Turn the tension stud q with a scr...
Page 33 - . MAINTENANCE AND INSPECTION
LK3-B438E Mark II 27 r 9 . MAINTENANCE AND INSPECTION 9 . MAINTENANCE AND INSPECTION CAUTION Turn off the power switch before carrying out cleaning, otherwise the machine may operate if thefoot switch is pressed by mistake, which could result in injury. Be sure to wear protective goggles and gloves ...
Page 35 - -4 . Cleaning the control box air inlet port
LK3-B438E Mark II 29 9 . MAINTENANCE AND INSPECTION q 9-3 . Draining the oil 1. R e m o v e a n d e m p t y t h e w a s t e o i l c o n t a i n e r q whenever it is full. 2. After emptying the waste oil container q , screw it back into its original position. 9-4 . Cleaning the control box air inlet ...
Page 36 - 0 . STANDARD ADJUSTMENTS; 0-2 . Adjusting the needle bar lift amount
30 LK3-B438E Mark II Maintenance and inspection of the sewingmachine should only be carried out by a quali-fied technician. Ask your Brother dealer or a qualified electri-cian to carry out any maintenance and inspec-tion of the electrical system. Turn off the power switch and disconnect thepower cor...
Page 37 - 0-5 . Adjusting the shuttle race thread guide
31 LK3-B438E Mark II q 0.01 - 0.08mm T i p Needle center line 10-3 . Adjusting the driver needle guard Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the setscrew w and turn the eccentric shaft e to adjust so that the driver needle guard q contac...
Page 40 - 0-8 . Adjusting the button clamp lift amount; Remove the button clamp presser spring
34 LK3-B438E Mark II 10-7-2. Adjusting the engagement of the movable knife and fixed knife A . After the movable knife and fixed knife are properly engaged, tighten the screw as shown in Fig.1.B. Turn the movable knife (in the direction of the arrow) while the screw is still tightened.C. Loosen the ...
Page 41 - 0-10. Adjusting the position of the button holder
35 LK3-B438E Mark II 10 . STANDARD ADJUSTMENTS q w 10-9. Adjusting the holding pressure Loosen the adjusting nut q and turn the adjusting nut w to the point where it is just tight enough that the material will not slip out of place when it is slightlypulled (keep pressure as slight as possible). 10-...
Page 42 - 0-11. Adjusting the needle up stop position
36 LK3-B438E Mark II 2 ± 0.5mm q w e ( A p p r o x .3 0 m m ) A p p r o x .2 0 m m r t 10-11. Adjusting the needle up stop position The needle up stop position is adjusted so that theindex mark w on the machine pulley q is inside the mark r on the belt cover e . If adjustment is necessary, loosen th...
Page 43 - 0-13. Checking the input sensor and DIP switch input
37 LK3-B438E Mark II 1. When the X-SCALE indicator q is illuminated and the RESET switch e is pressed while the TEST switch w is being pressed, the state of the X home position signal will appear on the display window r . · When sensor is ON · When sensor is OFF 2. Each time the SELECT switch t is p...
Page 44 - Display
38 LK3-B438E Mark II 10 . STANDARD ADJUSTMENTS S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series r e t 200V 220V 230V 100V380V400V415V Display [090 - 110] [100 - 120] [105 - 125] [100 - 120] Notes “100” is displayed when the input vo...
Page 46 - USING THE COUNTERS
40 LK3-B438E Mark II 11. USING THE COUNTERS 11-1 . Using the bobbin thread counter S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P3 P1 P2 POWER B430E Series r e y t q S E L E C T PROGRAM NO. R E S E T COUNTER X-SCALE Y-SCALE SPEED P T E S T BOBBIN.WIND P4 P...
Page 47 - CHANGING FUNCTIONS USING THE DIP SWITCHES; T h e o p e r a t i o n p a n e l D I P s w i t c h e s
41 LK3-B438E Mark II q DIPA-1 DIPA-2 DIPA-3 DIPA-4 DIPA-5 DIPA-6 DIPA-7 DIPA-8 Motion when set to ON See “12-2. Setting the presser mode” Presser does not automatically lift after sewing is completed. Two-pedal mode is available. User program mode is available. – The presser does not rise automatica...
Page 48 - 2-3 . DIP switches inside the control box; The DIP switches
42 LK3-B438E Mark II q DIPB-1 DIPB-2 DIPB-3 DIPB-4 DIPB-5 DIPB-6 DIPB-7 DIPB-8 Motion when set to ON First two stitches are sewn at a low speed of 260 rpm. Last two stitches are sewn at a low speed of 260 rpm. – Last two stitches are sewn at a low speed of 700 rpm. First two stitches are sewn at a l...
Page 51 - CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES
45 LK3-B438E Mark II memo-00 memo-01 memo-02 memo-03 memo-04 memo-05 memo-06 memo-07 memo-08 memo-09 memo-0A memo-0b memo-0c memo-0d memo-0E memo-0F Motion when set to ON At the end of sewing, the feed plate will be returned to the sewing start point via mechanical home position. Button clamp will m...
Page 55 - TABLE OF ERROR CODES
49 LK3-B438E Mark II Wait at least 5 minutes after turning off the power switch and disconnecting the power cord fromthe wall outlet before opening the face plate of the control box. Touching areas where high volt-ages are present can result in severe injury. Machine motor operation error. E-13 E-20...
Page 62 - INSTRUCTION MANUAL
INSTRUCTION MANUAL BROTHER INDUSTRIES,LTD. NAGOYA,JAPAN Printed in Japan 118-V38 S91V38-002 2000.02. B (1)
