Brother LK3-B430 Wartungshandbuch

SERVICE MANUALELECTRONIC LOCKSTITCH BAR TACKERPlease read this manual before making any adjustments.LK3-B430E

LK3-B430E Mark II31. PROGRAM LISTVertical bar tackingvertical straight bar tackingSewing patternProgram No.2627282930No. of stitches2835192128Standard

LK3-B430E Mark II42. STANDARD THREAD TENSION2. STANDARD THREAD TENSIONApplicationOrdinary materials (-1, -5) Denim (-2) Knitted materials (-7)Standard

LK3-B430E Mark II53. MECHANICAL DESCRIPTIONSertyuw!0!1!2!3qio3. MECHANICAL DESCRIPTIONS3-1. Needle bar, thread take-up, lower shaft and shuttle race m

LK3-B430E Mark II63. MECHANICAL DESCRIPTIONSwertyuqio!0!1!2uyqwrte3-2. Work clamp lifter mechanism1. When the presser signal is on, the presser soleno

LK3-B430E Mark II73. MECHANICAL DESCRIPTIONS!4u!1irewqy!0ot!3!2!53-4. Feed mechanism(Y direction)1. When the Y-pulse motor q operates, coupling hub 6.

LK3-B430E Mark II83. MECHANICAL DESCRIPTIONSrtyuweqio!0!1!2!33-5. Thread trimmer mechanism1. When the thread trimming signal is on, the thread trimmin

LK3-B430E Mark II93. MECHANICAL DESCRIPTIONSewqtryturweqi3-6. Thread nipper mechanism3-6-1. Manual operation1. When the presser bar lifter lever q is

LK3-B430E Mark II103. MECHANICAL DESCRIPTIONSqwer3-7. Thread take-up mechanism* Denim specification is optional.1. When the thread trimming signal is

LK3-B430E Mark II114. DISASSEMBLYUse only the proper replacement parts asspecified by Brother.If any safety devices have been removed,be absolutely su

LK3-B430E Mark II124. DISASSEMBLYwqeryrto!0!1ui!2!3qew!4!5@1@2!6!7!8!9@04-2. Presser arm mechanism1. Remove the set screw q, the needle w and theneedl

iLK3-B430E Mark IIThis service manual is intended for B430E Mark II; be sure to read the B430E Mark II instruction manual before this manual.Carefully

LK3-B430E Mark II134. DISASSEMBLYqewrwytiu!1!0!3r!4!5t!2o!24-4. Needle bar mechanism1. Remove the rubber cap q.2. Loosen the screw of the needle bar c

LK3-B430E Mark II144. DISASSEMBLYewq!7!6!4!3!5!2!1!8qr!8!1!0rtyuio!0!24-5. Upper shaft mechanism1. Loosen the screw w and the set screw e of the threa

LK3-B430E Mark II154. DISASSEMBLYrewqty!2o!1!0iu4-6. Lower shaft mechanism1. Tilt the machine head until it stops.2. Remove the felt support q.3. Loos

LK3-B430E Mark II164. DISASSEMBLYqitwyre!2!3u!0!1!3!2o4-7. Feed mechanism (1)1. With the machine head tilted, loosen the set screw of the set screw co

LK3-B430E Mark II174. DISASSEMBLYqweuyt!0!2r!1ioFeed mechanism (2)1. Remove the four screws q, the X-pulse motor assembly w, coupling hub 6.35 e, and

LK3-B430E Mark II184. DISASSEMBLYwqeio!0rtyu!1Feed mechanism (3)1. Loosen the set screw q, and remove coupling hub 6.35 e from the shaft of the pulse

LK3-B430E Mark II194. DISASSEMBLYq!6!8@1@0!7uuowe!9ityrq!0i!2u!1!3o!5!44-8. Presser mechanism1. Remove the two spring q.2. Remove the two screws w and

LK3-B430E Mark II204. DISASSEMBLYoiu!2!0!114-9. Thread wiper mechanism1. Remove the screw q, the washer w, and the thread wiper e.2. Loosen the set sc

LK3-B430E Mark II214. DISASSEMBLYqrew!0!8!7!6!5y!4iout!3!2!14-10. Thread nipper mechanism1. Loosen the set screw q, and remove the thread tension asse

LK3-B430E Mark II224. DISASSEMBLY!3!5!2qw!1uio!0ety!4!64-11. Thread take-up mechanism1. Remove the two screws q, and the solenoid setting plate w from

iiLK3-B430E Mark IIUse the sewing machine in an area which is free fromsources of strong electrical noise such as high-frequency welders.Sources of st

LK3-B430E Mark II234. DISASSEMBLYy!1uro!0ti@3@2eqw!9!6!7@1!8@0!4!5!2!34-12. Thread trimmer mechanism1. Remove the rubber cap q, loosen the set screw w

LK3-B430E Mark II245. ASSEMBLY5. ASSEMBLY5-1. Thread trimmer mechanism (1)1. Insert the driving lever shaft q into the machine. Place the spring w, th

LK3-B430E Mark II255. ASSEMBLYqwre!0iyut!4o!3!2!15-2. Thread nipper mechanism1. Insert the presser bar lifter crank q into the machine as shown, in th

LK3-B430E Mark II265. ASSEMBLYyt!0oiqu!2!1@1!8!9@0rewqtu!2!1!3!4!5!6!721 mm5-3. Thread wiper mechanism (1)1. Insert the thread wiper rod assembly q an

LK3-B430E Mark II275. ASSEMBLY5-4. Thread take-up mechanism1. Insert the thread take-up lever crank q into the machine and secure it using the thrust

LK3-B430E Mark II285. ASSEMBLY!1@3o!2!0@8!3!6!4!5@4!7@2@5r@6@5@0ye@5r!9!8@0@2twq@6!7@[email protected] ± 0.2 mm5-5. Presser mechanismDuring assembly, apply gr

LK3-B430E Mark II295. ASSEMBLYt!0ruteywqiotrewqIf the presser mechanism is sluggish, it may not move well vertically, resulting in occurrence of error

LK3-B430E Mark II305. ASSEMBLYeruqwytoiyy!0!2!1!1!2!02.5 mm5-6. Feed mechanism (1)Assembly steps of the feed mechanism are the same for X and Y direct

LK3-B430E Mark II315. ASSEMBLYerytuwqqoi!0!2!1!3Feed mechanism (2)1. Apply grease to the coupling spacer q, and fit it in coupling hub 8 w, fit the fe

LK3-B430E Mark II325. ASSEMBLYoq!3!2iu@5ot!1y!7!0@0!9!5y@7@2!4!8er!6@4@6@[email protected] - 0.5 mmFeed mechanism (3)1. Pass the shaft of the X feed lever q t

iiiLK3-B430E Mark II CAUTIONWait until the needle stops in the needle up positionbefore turning off the power.If this is not done, the wiper may strik

LK3-B430E Mark II335. ASSEMBLY!0!1!2!3!3!2owq!0!2ireqwerquty0.5 mm5-7. Upper shaft mechanism1. Insert the upper shaft q from the rear of the machine,

LK3-B430E Mark II345. ASSEMBLYt!7!6er!2yqw!9u@0@1!2!1q!0!8!3!5!1!3!45-8. Needle bar mechanism1. Temporarily tighten the screw w of the needle bar guid

LK3-B430E Mark II355. ASSEMBLY!2ewrq!4!2!3!2!5o!0!1iytu!0!7!6q0.05 - 0.12 mm5-9. Lower shaft mechanism1. Tilt the machine head until it stops.2. Inser

LK3-B430E Mark II365. ASSEMBLYrteqwyuoi!0io!2!10.5 mm5-10. Thread trimmer mechanism (2)1. Fit the hole of the thread trimmer connecting rod q over the

LK3-B430E Mark II375. ASSEMBLYqyutwr5-11. Thread wiper mechanism (2)1. When the sewing machine in the stop position, press link C q to check that the

LK3-B430E Mark II385. ASSEMBLYqwreyieeiey0.01 - 0.08 mm5-12. Shuttle race mechanism1. Attach the needle bar thread guide q to the needle bar w, and at

LK3-B430E Mark II395. ASSEMBLY!9y!8!2qw!1!0oter@2@0@3@1!9!4!7!3!5!6uiy0.1 - 0.5 mm0.1 -0.5 mm5-13. Presser arm mechanism1. Place the slide block q on

LK3-B430E Mark II405. ASSEMBLY10 N!7!8!5A!4!6o!9!3ytu!2!1rewi!05-14. Covers1. Attach the V belt q.2. Attach the the shuttle race cover r using the sho

LK3-B430E Mark II416. ADJUSTMENTUse only the proper replacement partsspecified by Brother.If any safety devices have been removed,be absolutely sure t

LK3-B430E Mark II426. ADJUSTMENToyueqwrti6-3. Adjusting the driver needle guardTurn the pulley to align the shuttle hook point with the center of the

ivLK3-B430E Mark IISafety devicesEye guardFinger guardThread take-up coverThread take-up solenoid coverBelt coverMotor cover, etc.23Be sure to connect

LK3-B430E Mark II436. ADJUSTMENTqwter6-6. Adjusting the work clamp lift amountThe maximum work clamp lift amount is 17 mm from the top of the needle p

LK3-B430E Mark II446. ADJUSTMENT6-8. Adjusting the thread take-up amountAt the time of shipment from the factory, the thread take-up amount (stroke) o

LK3-B430E Mark II456. ADJUSTMENTyui6-9-1. Replacing the movable and fixed knives1. Open the shuttle race cover, and remove the flat screw q, the screw

LK3-B430E Mark II466. ADJUSTMENTqwerterytre6 mm6 mm6-10. Adjusting the driving lever stopper position1. Remove the screw q and the top cover w.2. If t

LK3-B430E Mark II476. ADJUSTMENT6-12. Adjusting the thread trimming solenoid position1. Remove the screws q and the top cover w.2. Fully press the plu

LK3-B430E Mark II486. ADJUSTMENTo!0iyuuierqwytyt110.0 mm ± 0.2 mmApprox. 5 mm6-14. Adjusting the positions of the presser solenoid1. Remove the screws

LK3-B430E Mark II496. ADJUSTMENToyuiterweq!2!0!4!3!5!16-16. Adjusting the home position1. Following the instruction manual, turn on the power, set the

LK3-B430E Mark II506. ADJUSTMENTeqwr6-18. Adjusting the V-belt tension1. Remove the screw q, loosen the screw w, then remove the belt cover e.2. Press

LK3-B430E Mark II517. GAUGE PARTS LIST ACCORDING TO SUBCLASSES7. GAUGE PARTS LIST ACCORDING TO SUBCLASSESThe following are standard gauge parts accord

LK3-B430E Mark II527. GAUGE PARTS LIST ACCORDING TO SUBCLASSESStandard sizes for work clamps and feed plates are as follows:(The actual sewing area ha

LK3-B430E Mark II1. PROGRAM LIST ... 12. STANDARD THREAD TENSION... 43. MECHANICAL DESCRIPTIONS...

LK3-B430E Mark II537. GAUGE PARTS LIST ACCORDING TO SUBCLASSES<Gauge parts>The following are provided as optional gauge parts.Each work clamp pa

LK3-B430E Mark II547. GAUGE PARTS LIST ACCORDING TO SUBCLASSES11 12 13S46771-001(For straight bar tacking/submerged)S46774-001(For vertical bar tackin

LK3-B430E Mark II557. GAUGE PARTS LIST ACCORDING TO SUBCLASSES3834155994-000S10211-001A S51449-001AF-7 (For knitted materials)-1,-5 (For ordinary mate

LK3-B430E Mark II56 Two-pedal foot switch ... The presser switch and the start switch have been sepa-rated, g

LK3-B430E Mark II579. TROUBLESHOOTING9. TROUBLESHOOTINGProblem Cause Check Solution PageWork clamp does not rise.Link operation is slug-gish.Solenoid

LK3-B430E Mark II58Problem Cause Check Solution PageUpper thread unthreadedStitches skipped at start of sewingSee "Skipped stitches occur."←

LK3-B430E Mark II59Problem Cause Check Solution PageNeedle breaks.Needle is interfering with rotary hook.Clearance between needle and rotary hook poin

LK3-B430E Mark II60Problem Cause Check Solution PagePoor stitching on reverse side of materialRotary hook thread guide does not separate upper and low

LK3-B430E Mark II10. ELECTRIC MECHANISM61Panel PCBAir inletMain circuit boardPower supplycircuit boardDC fan motorControl boxOperation panel10. ELECTR

LK3-B430E Mark II10. ELECTRIC MECHANISM621234Part nameG fuse (5AFB) (quick melting type, 5A-250V)G fuse (7AFB) (quick melting type, 7A-250V)Fuse 6A (g

LK3-B430E Mark II9. TROUBLESHOOTING ... 5710. ELECTRIC MECHANISM... 6110-1. Precautions at the time o

LK3-B430E Mark II10. ELECTRIC MECHANISM63For foot switchMain circuit boardP15EXINP16PERP20RSPORTP117FOOTP18HEADP8PANELP1AORG1P1BORG2P2SYNCHROP3SELECTP

LK3-B430E Mark II10. ELECTRIC MECHANISM64Power supply circuit boardP5DC300P4ACINP3DC18P2PERP1POWERPanel PCBP1

LK3-B430E Mark II10. ELECTRIC MECHANISM65 Contact failureThe connectors functions are divided into four categories. Some connectors may belong to mor

LK3-B430E Mark II10. ELECTRIC MECHANISM663. Sewing operation• The power lamp is not lit, and nothing operates.• Machine operation is unstable.• The po

LK3-B430E Mark II10. ELECTRIC MECHANISM67• The DC fan motor does not run.• Error E-70 is displayed.• Error E-F1 is displayed.• Indication is strange.•

LK3-B430E Mark II10. ELECTRIC MECHANISM68The operation panel DIP switches q are used tochange functions which might need to be changeddepending on the

LK3-B430E Mark II10. ELECTRIC MECHANISM69 DANGERWait at least 5 minutes after turning off the power switch and disconnecting the power cord fromthe wa

LK3-B430E Mark II10. ELECTRIC MECHANISM70memo-00memo-01memo-02memo-03memo-04memo-05memo-06memo-07memo-08memo-09memo-0Amemo-0bmemo-0cmemo-0dmemo-0Ememo

LK3-B430E Mark II10. ELECTRIC MECHANISM71memo-11 - memo-13memo-19memo-1Amemo-1bmemo-14memo-15memo-16memo-17memo-18memo-1FMotion when set to ON—Presser

LK3-B430E Mark II10. ELECTRIC MECHANISM72SELECTPROGRAM NO.RESETCOUNTERX-SCALEY-SCALESPEEDPTESTBOBBIN.WINDP4P3P1 P2B430E Mark SeriesPOWERqewtr10-7. C

LK3-B430E Mark II11. PROGRAM LIST1. PROGRAM LISTFor each specification, sewing patterns are limited as shown in the table below. (Any program is avail

LK3-B430E Mark II10. ELECTRIC MECHANISM73SELECTPROGRAM NO.RESETCOUNTERX-SCALEY-SCALESPEEDPTESTBOBBIN.WINDP4P3P1 P2B430E Mark SeriesPOWERreqtw200V220

LK3-B430E Mark II10. ELECTRIC MECHANISM7410-10. Confirming software version3rd and 4th digits: Special specification2nd digit: Version numberVersions

LK3-B430E Mark II10. ELECTRIC MECHANISM75 DANGERWait at least 5 minutes after turning off the power switch and disconnecting the power cord fromthe wa

LK3-B430E Mark II10. ELECTRIC MECHANISM76 Errors generated when optional equipment is connectedE-10E-11E-12E-14CauseEmergency stop switch was pressed

LK3-B430E Mark II10. ELECTRIC MECHANISM77NOYESYESNONOYESWhen the power is turned on.Moving to the home position#1#2#3StartTurn on the power.Turn off t

LK3-B430E Mark II10. ELECTRIC MECHANISM78Does the work clamp return to the home position?Does the work clamp rise?Does the work clamp lower after it h

LK3-B430E Mark II10. ELECTRIC MECHANISM79Does the needle slowly move stitch by stitch?Does the feed mechanism move quickly?Does the machine operate co

LK3-B430E Mark II10. ELECTRIC MECHANISM80Does the machine stop with the needle at the top?Does the machine operate correctly for the set program and r

LK3-B430E Mark II10. ELECTRIC MECHANISM81Probable causes1. Conversion transformer improperly wired (for 100V specification)(For 380 V, 400V, and 415 V

LK3-B430E Mark II10. ELECTRIC MECHANISM82Probable causes4. Fuse has blown5. Power supply circuit board defective6. Main circuit board defective7. Pane

LK3-B430E Mark II21. PROGRAM LIST-7UseFor knitted materialsProgram No.7922Sewing patternNo. of stitches282114Standard bar tacking length8mm7mm7mmStand

LK3-B430E Mark II10. ELECTRIC MECHANISM83Pdrobable causes 1. Cooling fan defective when the error code E-70 appears on the display window. 2. PROM chi

LK3-B430E Mark II10. ELECTRIC MECHANISM84Probable causes1. Panel PCB detective1. Home position sensor not adjusted properly1. Foot switch and its cord

LK3-B430E Mark II10. ELECTRIC MECHANISM85Pdrobable causes2. Power supply circuit board is defective when the feed mechanism does not move and error co

LK3-B430E Mark II10. ELECTRIC MECHANISM86Probable causes1. Work clamp is not lowered when error code E-60 appears on the display window.2. Work clamp

LK3-B430E Mark II10. ELECTRIC MECHANISM87Probable causes1. Test switch and its cord are defective 2. Test lamp and its cord are defective3. Main cir

LK3-B430E Mark II10. ELECTRIC MECHANISM88Probable causes1. Cable related to machine motor is defective2. Main circuit board is defective when fuse F1

LK3-B430E Mark II10. ELECTRIC MECHANISM89Thread take-up lever does not operate.Probable causes1. Synchronizer defective2. Pulse motor is defective or

LK3-B430E Mark II10. ELECTRIC MECHANISM90Thread take-up lever does not operate.Probable causes3. Main circuit board defective1. Poor adjustment2. Sy

10. ELECTRIC MECHANISM91LK3-B430E Mark IICOM021COM13 COM24 COM35 COM46 COM57 +5V8 BUZ9 LEDD710 LEDD611 LEDD512 LEDD413 LEDD3LEDD2262524232221201918171

SERVICE MANUALBROTHER INDUSTRIES,LTD. NAGOYA,JAPANPrinted in Japan118-V30I9100769B1999.11. (1)