Brother LK3-B430E MARK II Service Manual Download Page 65

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LK3-B430E Mark II

Problem

Cause

Check

Solution

Page

U p p e r t h r e a d
unthreaded

Stitches skipped at
start of sewing

See "Skipped stitches
occur."

←

Upper thread breaks.

Lower thread breaks.

Skipped stitches occur.

Unstable thread length
after thread trimming

Upper thread length
after thread trimming

Adjust the sub tension.

Thread take-up lever
stroke is too great.

Thread take-up lever
stroke

Adjust the thread take-
up lever stroke.

Turn the thread tension
nut in the bobbin case to
adjust the tension.

←

Upper thread tension
is too great

Upper thread tension

Adjust the upper
thread tension.

Improper needle
orientation

Needle orientation

Reinstall the needle
with its long groove
facing the front.

Thread is too thick for
needle.

Upper thread and
needle

Use the correct thread
for the needle.

Improper tension and
height of the thread
take-up spring

Thread take-up spring
tension and height

Adjust the tension and
height of the thread
take-up spring.

Damaged or burred
rotary hook, needle
hole plate or needle

Scratches or burrs

File or replace the
affected part.

Thread melting
(synthetic thread)

Thread end

Use the thread cooling
device.

Lower thread tension
is too great.

Lower thread tension

Adjust the tension of
the lower thread.

Damaged corners of
needle hole plate or
bobbin case

Damage

File or replace the
affected part.

Excessive clearance
between needle and
rotary hook tip

Clearance between
needle and rotary hook
point

Adjust the needle clearance
between the needle and the
rotary hook point.

Improper timing
between needle and
rotary hook

Needle bar lift stroke

Adjust the needle bar
lift stroke.

Driver is contacting
needle more than is
necessary.

Clearance between
driver and needle

Adjust the driver
needle guard.

Needle bent

Needle curve

Replace the needle
with a new one.

Needle improperly
installed

Needle orientation

Reinstall the needle
with its long groove
facing the front.

9. TROUBLESHOOTING

Summary of Contents for LK3-B430E MARK II

Page 1: ...SERVICE MANUAL ELECTRONIC LOCKSTITCH BAR TACKER Please read this manual before making any adjustments LK3 B430E ...

Page 2: ...nts and injury to yourself or other people The meanings of these indications and symbols are given below Indications The instructions which follow this term indicate situations where failure to follow the instruc tions could cause injury when using the machine or physical damage to equipment and sur roundings Symbols This symbol indicates something that you should be careful of The picture inside ...

Page 3: ...stallation should be carried out by two or more people Do not connect the power cord until installation is complete otherwise the machine may operate if the foot switch is pressed by mistake which could result in injury Hold the machine head with both hands when tilting it back or returning it to its original position Furthermore after tilting back the machine head do not push the face plate side ...

Page 4: ...ot touch any of the moving parts or press any objects against the machine while sewing as this may result in personal injury or damage to the machine If an error occurs in machine or if abnormal noises or smells are noticed immediately turn off the power switch Then contact your nearest Brother dealer or a qualified technician If the machine develops a problem contact your nearest Brother dealer o...

Page 5: ...Brother dealer 3 Warning labels 1 Moving parts may cause injury Operatewithsafetydevices Turn off main switch before threading changing bobbin and needle cleaning etc Hazardous voltage will cause injury Turn off main switch and wait 5 minutes before opening this cover Un voltage non adapté provoque des blessures Eteindrel interrupteur et attendre 5 minutes avantd ouvrir le capot Hochspannung verle...

Page 6: ... 5 8 Needle bar mechanism 34 5 9 Lower shaft mechanism 35 5 10 Thread trimmer mechanism 2 36 5 11 Thread wiper mechanism 2 37 5 12 Shuttle race mechanism 38 5 13 Presser arm mechanism 39 5 14 Covers 40 6 ADJUSTMENT 41 6 1 Adjusting the needle bar height 41 6 2 Adjusting the needle bar lift stroke 41 6 3 Adjusting the driver needle guard 42 6 4 Adjusting the needle clearance 42 6 5 Adjusting the sh...

Page 7: ...h functions 68 10 5 2 Setting the presser mode 68 10 5 3 DIP switches inside the control box 69 10 6 Explanation of the memory switches 70 10 7 Checking the input sensor and DIP switch input 72 10 8 Checking the input voltage 73 10 9 Clearing all memory settings 73 10 10 Confirming software version 74 10 11 Table of error codes 75 10 12 Troubleshooting flowchart 77 10 12 1 Troubleshooting flowchar...

Page 8: ...p and feed plate in size 1 5 2 Use For ordinary materials For denim Program No 1 4 5 8 13 15 20 21 2 3 6 14 16 17 18 19 Sewing pattern No of stitches 42 30 29 21 35 42 28 35 42 35 30 35 43 42 56 64 Standard bar tacking length 16mm 16mm 10mm 7mm 10mm 10mm 7mm 7mm 20mm 20mm 16mm 16mm 16mm 24mm 24mm 24mm Standard bar tacking width 2mm 2mm 2mm 2mm 2mm 2mm 2mm 2mm 3mm 3mm 3mm 3mm 3mm 3mm 3mm 3mm Specif...

Page 9: ...ar tacking length 10mm 10mm 20mm 25mm 25mm 25mm Standard bar tacking width 0 3mm 0 3mm 0 3mm 0 3mm 0 3mm 0 3mm To prevent thread breakage due to heat set the sewing speed to a maximum of 2 500 rpm for sewing knitted materials The difference between 1 and 5 specifications for ordinary material is that the standard presser foot and feed plate are different Length when the sewing size is 100 Straight...

Page 10: ...Program No 26 27 28 29 30 No of stitches 28 35 19 21 28 Standard bar tacking length 3mm 3mm 0 3mm 0 3mm 0 3mm Standard bar tacking width 10mm 10mm 10mm 10mm 10mm Vertical bar tacking vertical straight bar tacking Use the presser foot and feed plate for straight bar tacking when using the above programs ...

Page 11: ...9 1 0 1 3 1 2 1 6 1 4 1 8 0 8 1 0 Lower thread tension N 0 2 0 3 0 2 0 3 0 2 0 3 Spring height mm 6 8 6 8 6 8 Spring tension N 0 15 0 35 0 4 0 6 0 2 0 4 Pretension N 0 1 0 3 0 3 0 5 0 1 0 3 Needle DP 5 14 DP 17NY 19 DP 5 9 Measuring tension Needle thread tension Lower thread tension Spring height Spring tension When the spring height stroke is great or the spring tension is insufficient it may cau...

Page 12: ... bar crank r attached to the crank e moves the thread take up lever t 3 The needle bar crank y moves the needle bar u up and down via the thread take up lever t 4 When the pulley q rotates in the direction of the arrow the eccentric portion of the upper shaft w causes the crank rod i to move up and down 5 The crank rod i moves the rock gear o back and forth 6 The motion of the rock gear o causes t...

Page 13: ...When the presser plate q lowers the presser arm lever plate w is pressed down presser arm levers R and L r pivot on the presser arm lever shaft e and work clamps R and L t rise 2 When the presser plate q lowers the motion is transmitted to the thread wiper driving lever u the thread wiper rod assembly i and the thread wiper link o via link shaft B y and the thread wiper arm 1 and the thread wiper ...

Page 14: ... via the feed cam roller o 3 The motion of the Y feed lever 0 is transmitted to the feed bracket i via the tack width lever shaft y X direction 1 The motion of the X pulse motor 1 is transmitted to feed cam X 2 with the same couplings as for Y direction 2 One end of the X feed lever 3 is positioned on feed cam X 2 along with the feed cam roller 4 and the other is attached to the feed bracket i alo...

Page 15: ...ead trimmer driving lever r in the direction of the arrow and slides on the driving lever shaft t 3 The roller y attached to the thread trimmer driving lever r is inserted into the groove of the thread trimmer cam u and the thread trimmer rod i operates 4 The thread trimmer rod i moves the connecting rod lever 0 via the thread trimmer lever o 5 The thread trimmer connecting rod 1 attached to the c...

Page 16: ...s to push the tension release driving lever q in the direction of the arrow and the roller w which is attached to the tension release driving lever q is positioned on the periphery of the thread trimmer cam e 2 The tension release cam of the thread trimmer cam e moves the tension release driving lever q in the direction of the arrow 3 Tension release lever U r which is engaged with the tension rel...

Page 17: ...he thread trimming signal is received the thread trimmer solenoid q operates to move the sole noid joint w in the direction of the arrow 2 The crank shaft e engaged with the solenoid joint w turns in the direction of the arrow 3 The thread take up lever r engaged with the crank shaft e operates in the direction of the arrow ...

Page 18: ...ould only be carried out by a qualified technician Be sure to wear protective goggles and gloves when handling the lubricating oil and grease so that they do not get into your eyes or onto your skin otherwise inflammation may result Furthermore do not drink the oil or eat the grease under any circumstances as they may cause vomiting and diarrhea Keep the oil out of the reach of children CAUTION 4 ...

Page 19: ...he flat screw o the screw 0 and the feed plate 1 4 Remove the two flat screws 2 the two screws 3 and the needle plate 4 5 Remove the rubber cap 5 the set screw 6 and the tack width feed shaft 7 6 Remove the eight screws 8 and the feed bar guide plate 0 along with the feed bracket 9 Pay attention not to let the ball bearing 1 fall 7 Remove the slide block 2 from the pin 4 3 Shuttle hook mechanism 1...

Page 20: ... bar guide slide block y from the needle bar guide t 4 Remove the rubber cap u loosen the set screw i and remove the wick o and the thread take up support stud 0 5 Remove the oil cap 1 loosen the two set screws of the thread take up crank 2 and remove the thread take up lever r The thread take up assembly 3 will come off 6 Remove the rubber cap 4 the screw 5 and the needle bar guide t Do not remov...

Page 21: ... wick support i 4 Remove the screw o and the crank rod 0 At this time lower the lower part of crank rod 0 in the direction of the arrow 5 Loosen the set screws of the bobbin winder pulley 1 and the thread trimmer cam 2 6 Remove the V belt 3 loosen the set screw 4 and remove the pulley 5 7 Remove the screw 6 and the synchronizer 7 8 Remove the upper shaft r in the direction of the arrow After that ...

Page 22: ... the retaining ring r 4 Loosen the set screw of the set screw collar t and remove the lower shaft assembly y from the rear of the machine The set screw collar t will come off 5 Loosen the two set screws u 6 Untie the wick i loosen the set screw of the set screw collar o and remove the rock gear shaft 0 from the rear of the machine 7 Remove the set screw collar o the rock gear 1 and the crank rod 2...

Page 23: ...nd the washer r from above When the tack width lever shaft t is not removed remove the retaining ring e and the washer r 4 Remove the Y feed lever i by lifting it in the direction of the arrow Remember to remove the washer r under the Y feed lever i 5 Remove the screw y and home position sensor Y u 6 Remove the X feed lever o by lifting it in the direction of the arrow 7 Remove the screw 0 and hom...

Page 24: ...r 2 Tilt the machine head until it stops 3 Remove the screw t the Y pulse motor assembly y coupling hub 6 35 u and the coupling spacer r 4 Return the machine head to its original position 5 For the X direction remove the screw i the feed cam bracket o feed cam X 0 coupling hub 8 1 and the feed home position dog 2 by lifting them from above 6 Repeat step 5 for the Y direction ...

Page 25: ...ve coupling hub 6 35 e from the shaft of the pulse motor w 2 Remove the screw r and the feed home position dog t from coupling 8 y 3 Loosen the set screw u and remove coupling hub 8 y from the cam shaft i 4 Loosen the set screw o and remove the cam shaft i 5 Remove the feed cam 0 from the feed cam bracket 1 ...

Page 26: ...arm 4 Loosen the set screw u and remove the snap pins i link shaft A o and the washers 0 5 Remove the rubber cap 1 the snap pin 2 and link shaft C 3 Be sure to hold the presser plate 4 and the presser bar lifter lever rubber 5 so that they do not fall 6 Remove the presser lifter link related parts upward 7 Remove the two rubber caps 6 and the two screws 8 of the solenoid setting plate B 7 8 Remove...

Page 27: ...ining ring y 4 Remove the retaining ring u the washer i the spring o and the retaining ring 0 Then remove the thread wiper rod assembly 1 from the presser bar lifter lever shaft 2 5 Remove the thread wiper assembly 1 and the thread wiper driving lever 3 by lifting them upward 6 Loosen the set screw 4 and remove the thread wiper link 5 and the thread wiper arm 6 by pulling them downward w e 4 y 5 2...

Page 28: ...read tension release lever y the stud screw 0 securing both tension release lever U i and the pushing lever o and then remove the tension release rod 1 and the pushing lever o in the direction of the arrow 3 Loosen the set screw 2 and remove the presser bar lifter lever shaft 3 collar 13 4 and tension release lever y 4 Remove the screw 5 the washer 6 and the presser bar lifter lever 7 5 Remove the...

Page 29: ...he spring e from the spring hook r 3 Loosen the set screw y of the solenoid joint t and remove the solenoid joint t from the thread take up solenoid u 4 Remove the screw i the spring washer o the washer 0 and the nut 3 57 1 from the solenoid setting plate w 5 Remove the two stud screws 2 and the thread take up lever 3 6 Remove the retaining ring 4 the crankshaft 5 and the washer 6 r r ...

Page 30: ...it in the direction of the arrow Then remove the cushion i the tension release driving lever o the washer 0 and the spring 1 from the shaft 4 Tilt the machine head until it stops 5 Remove the thread trimmer return spring 2 and the spring hook 3 6 Remove the nuts 4 and 5 the stud screws 6 and 7 and the two washers 8 7 Loosen the set screw 9 and remove the lever shaft 0 and the thread trimmer lever ...

Page 31: ... then secure them using the set screw 2 5 Attach the rubber cap 3 6 Tilt the machine head until it stops 7 Pass the lever shaft 5 with the washer and the retaining ring through the thread trimmer lever 4 and tighten the set screw 6 on the screw flat 8 Attach the thread trimmer rod 7 to the thread trimmer lever 4 using the stud screw 8 and the nut 9 and also attach the connecting rod lever 0 to the...

Page 32: ...ar lifter lever w moves easily 2 Insert the presser bar lifter lever shaft t into the machine and place the tension release lever y and collar 13 u on it 3 Insert the tension release rod i into the machine in the direction of the arrow as shown attach it to the tension release lever y using the stud screw o and attach tension release lever U 1 and the pushing lever 2 to the driving lever stopper 3...

Page 33: ... to it 5 Insert the thread wiper arm 1 and the thread wiper link 2 into the machine in the direction of the arrow and attach the retaining ring 3 6 Temporarily tighten the set screw 4 so that the thread wiper arm 1 is positioned 21 mm below from the bottm of the arm 7 Attach the thread wiper 5 using the washer 6 and the screw 7 8 Move the forked portion of the thread wiper driving lever w and chec...

Page 34: ...k 4 of the solenoid joint 2 6 Place the thread trimming solenoid joint 2 onto the crankshaft q so that the flat surfaces are aligned and then install the solenoid setting plate y to the machine head with the two screws 6 7 Turn the thread trimming solenoid joint 2 forward you in the direction of the arrow while tightening the two set screws 3 of the thread trimming solenoid joint 2 so that the gap...

Page 35: ... top of the arm 5 Tighten the screws 0 and 1 in this order when the presser bar lifter solenoid o is 11 0 0 2 mm away from the end of the arm and insert the rubber cap 2 into the hole on the side of the arm 6 Pass link shaft D 3 through the hole in the arm Insert it into the holes in the plunger 4 and link C 5 and attach the snap pins 6 7 Insert link shaft A 7 into the machine and pass it through ...

Page 36: ...link A r and link C assy t 3 Forked portion of the wiper driving lever y 4 Sliding portions of link shaft A u and link A r 5 Sliding portions of link shaft D i link C assy t 6 Forked portion of the plunger o where link C assy t is fitted 7 Outer and inner surfaces of spherical bush 0 to be attached to link C assy t 1 Sliding portion of the work clamp q Apply small amount of grease 2 Sliding portio...

Page 37: ... with the retaining ring e attached through them 2 Fit coupling hub 8 t on the cam shaft r so that there is no end play adjust the set screw y on the screw flat and tighten it 3 Adjust the set screw u of the feed cam q on the screw flat and tighten it so that the feed cam q rotates easily 4 Fit the feed home position dog i on coupling hub 8 t and tighten the screw o in the center of the slot 5 Fit...

Page 38: ... Adjust the angle of coupling hub 6 35 o of the pulse motor X i to that of the coupling spacer q Pass the former through the machine wall and secure it using the screw 0 4 Tilt the machine head until it stops 5 Adjust the angle of coupling hub 6 35 2 of the pulse motor Y 1 to that of the coupling spacer q Pass the former through the machine wall and secure it using the screw 3 6 Return the machine...

Page 39: ... Y feed lever 4 Put the driver into the end of the Y feed lever o and press the X feed lever q downward 5 Tilt the machine head until it stops 6 Place the set screw collar 2 on the shaft of the X feed lever q press it in the direction of the arrow and tighten the set screw 3 7 Return the machine head to its original position 8 Attach the X home position sensor 4 and the Y home position sensor 5 us...

Page 40: ...take up crank t the washer r and the bobbin winder pulley e close to the upper shaft bush so that there is no end play in the upper shaft q Secure the bobbin winder pulley e by adjusting the set screw to its screw flat and tightening it 4 Press the thread trimmer cam w against the crank of the upper shaft q Adjust the set screw o that comes first when rotating to the screw flat and tighten it 5 At...

Page 41: ...ure Be sure to apply grease to the sliding block 0 and the groove of the needle bar guide q 5 Insert the needle bar 3 from the top of the machine into the needle bar clamp 1 6 Turn the pulley to set the needle bar 3 at its lowest position Move the needle bar vertically so as to align the second lowest reference line A for using needle DP 17 or the highest reference line a for using needle DP 5 on ...

Page 42: ...t bush u between the lower shaft gear and the set screw collar y without any clearance and tighten the set screw i Apply grease to the portion between the lower shaft bush u and the set screw collar y 5 Fit the retaining ring o on the lower shaft t press the driver 0 against the retaining ring o and tighten the screw 1 6 Return the machine head to its original position 7 Fit the crank rod 2 over t...

Page 43: ... At this time the plunger 0 of the thread trimming solenoid i must be fully pressed the same status as when the thread trimming solenoid i is turned on and a 0 5 mm clearance must be provided between the thread trimmer driving lever 1 and the driving lever stopper 2 4 Make sure that the thread trimmer driving lever 1 moves smoothly when the plunger 0 is pressed and released 5 Tilt the machine head...

Page 44: ... 2 0 5 mm when the thread wiper w has passed under the needle If it is not loosen the set screw r and adjust the thread wiper arm t by moving it vertically 2 Make sure that the thread wiper w is positioned 30 mm to the left from the center of the needle bar when link C q is fully pressed If it is not remove the rubber cap y loosen the set screw u and adjust the thread wiper position Approx 20 mm A...

Page 45: ...r i when the center C of the needle is aligned with the point of the inner rotary hook If it does not loosen the set screw 0 and turn the eccentric shaft 1 Retighten the set screw 0 afterwards 4 Make sure that there is a 0 01 0 08 mm clearance between the needle e and the point D of the inner rotary hook when they are aligned If there is not loosen the set screw 2 and turn the eccentric shaft 3 Re...

Page 46: ...f the feed bracket e and secure the presser arm 3 to the feed bracket e using the bolt 5 and the washer 6 6 Secure the presser arm support shaft 4 using the set screws so that the back of the support plate 7 can just make contact with ball bearings in the presser arm support shaft 4 when the work clamp rises 7 Turn on the power of the machine set the program to No 00 press the foot switch to reset...

Page 47: ...t the belt tension by moving the tension pulley to the right and left so that there is 9 10 mm of deflection in the V belt q when it is gently pushed in the middle with a force of approximately 10 N After adjusting tighten the bolt b to secure the left pulley assembly Move the right tension pulley so that there is a gap of about 1 mm between it and the V belt q and then tighten the bolt c to secur...

Page 48: ...r the needle bar at its lowest position Remove the rubber cap w and loosen the screw e Move the needle bar up or down to adjust the needle bar height so that the second lowest line A of the needle bar is aligned with the bottom of the needle bar bush q when the needle bar is lowered to its lowest position For needle DP 5 align the highest line a on it with the bottom of the needle bar bush 6 2 Adj...

Page 49: ... 01 0 08 mm Center of the needle Shuttle hook point Turn the pulley to align the shuttle hook point with the center of the needle Loosen the set screw q and turn the eccentric shaft w to adjust the clearance between the needle and the shuttle hook point to 0 01 0 08 mm 6 5 Adjusting the shuttle race thread guide 1 Loosen the bolt q and the washer w and remove the presser arm e Then loosen the two ...

Page 50: ...ork clamp is being raised and lowered it may not be possible to increase the work clamp life amount If the work clamp cannot be raised or lowered error code E 61 or E 63 will be displayed 6 7 Adjusting the thread wiper Approx 20 mm 2 0 5 mm Approx 30 mm Use Ordinary materials 1 5 Denim 2 Knitted materials 7 Life amount 10 1 0 mm 14 1 0 mm 9 1 0 mm 17mm w e q y i u o 2 1 u 1 Loosen the screw q and ...

Page 51: ...s longer when the stopper is moved downward and it be comes shorter when the stopper is moved upward NOTE Do not increase the stroke of the thread take up lever any more than is necessary If the sub thread tension is too high the needle thread length may become too short and the thread may come out of the needle Furthermore if the sub thread tension is too weak the needle thread length may become ...

Page 52: ...5 Remove the fixed knife 0 and replace it with a new one Place it 0 5 mm from the needle hole plate 3 6 Insert the thread trimmer connecting rod u to the pin of the connecting rod lever i and attach the needle plate y 6 9 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 mova...

Page 53: ... an imprinted number mark 2 3 or 4 If the clearance is larger than 0 15 mm replace the driving lever stopper r with that with a different number For example when the number 3 stopper is used replace it with number 4 stopper When the number 4 stopper is used replace it with number 2 stopper 6 11 Adjusting the thread trimmer driving lever position 1 Remove the screws q and the top cover w 2 Turn the...

Page 54: ...the thread trimmer driving lever t and the driving lever stopper y to 0 5 mm and tighten the screw u 6 13 Adjusting the backlash 1 Loosen the set screw q and turn the rock gear shaft w to adjust the play at the end of the driver e to 0 05 0 12 mm 2 After adjustment move the rock gear shaft w to the left and right so that the pulley can rotate easily and tighten the set screw q 0 5 mm 0 05 0 12 mm ...

Page 55: ...2 mm away from the shoulder of the machine Tighten the screw o If this adjustment is not performed properly the work clamp may not rise or lower properly resulting in the occurrence of error E 60 6 15 Adjusting the sensor perceive plate position 1 Remove the screws q and the top cover w 2 Turn on the power and change to the sensor mode on the operation panel Refer to page 72 3 Remove the rubber ca...

Page 56: ...dhered to the home position sensors 4 and 5 or a wire is broken error E A0 may occur 6 17 Adjusting the needle up stop position 1 Loosen the screw t at the U side on the pulley q and turn the pulley q so that the mark w on the pulley is inside the mark r of the belt cover e The pulley q stops later if it is turned clockwise it stops earlier if it is turned counterclockwise The standard needle up s...

Page 57: ...d of 10 N and adjust the tension pulley r so that the V belt deflection is approximately 9 10 mm 3 Adjust the right tension pulley so that there is a gap of about 1 mm between it and the V belt When the belt tension is weak the following problems will occur Noise vibration become large Needle up stop position becomes unstable Error code E 50 is displayed Approx 9 10 mm r 10 N Approx 1 mm ...

Page 58: ...1 E φ1 6 S10211 001 A 152690 301 B 159610 201 A 159610 201 A 154340 001 B 154339 001 A 154341 001 154341 001 S15667 001 LA 159612 001 A 159613 051 159613 051 152687 902 B 152685 903 A 152685 903 A 152686 101 B 152682 101 A 107606 001 104525 001 144588 001 B 145519 001 S15902 401 LA S15902 401 LA 154339 001 A S16074 101 LA S16074 101 LA 159612 001 A S16074 101 LA S15667 001 LA S15665 001 LA S15663 ...

Page 59: ...9 107415 009 S49591 001 S49594 001 S49596 001 5 6 23 for 3mm use R 153608 101 L 154527 001 4 18 for 2mm use R 152777 001 L 152778 001 4 12 for 2mm use R 152779 001 L 152780 001 S49697 001 12 31 Submerged type L S49698 001 12 24 Submerged type S S49700 001 5 13 for 2mm use S49699 001 Needle Work clamp U Use Part name Thread guide needle bar Needle assy Work clamp arm assy Feed plate Subclass 1 5 2 ...

Page 60: ...L 153203 001 PS 153204 001 PS S00906 001 1 Inch S00907 001 1 Inch S49942 001 For denim S49943 001 PL S49944 001 PS S49946 001 1 Inch L Work clamp U Feed plate Work clamp U Feed plate 5 6 7 8 R S33747 001 30mm S33748 001 30mm 153201 001 For denim 153202 001 For denim 152777 001 PM 152778 001 PM S49695 001 F S49694 001 F S49948 001 30mm S49949 001 For denim S49943 001 PL S49696 001 F L 23 23 33 33 2...

Page 61: ...56006 001 156006 001 017680 512 017680 512 017680 512 017680 512 R L Work clamp U Feed plate Work clamp U Bolt 10 S46771 001 For straight bar tacking S46770 001 For straight bar tacking S49970 001 For straight bar tacking 156006 001 32 4 5 6 32 4 5 6 4 4 13 4 4 13 42 16 5 33 3 5 13 15 23 14 6 φ13 φ13 14 6 10 10 15 R S46777 001 For circular stitching S46780 001 For crescent bar tacking L S46776 001...

Page 62: ...S30926 001 FD S41013 001 BZ S49980 001 FM S29997 001 D S30450 001 H S10212 101 E S25127 001 L S30925 001 ED S34348 001 M S10213 001 F S49976 000 S49977 000 S49978 000 20 4 3 3 3 3 4 8 2 8 2 8 2 8 3 3 φ1 6 φ2 2 3 φ1 6 φ10 φ2 2 φ2 6 φ2 6 φ4 7 φ6 5 φ4 φ3 3 φ2 6 φ10 φ3 4 φ2 2 φ2 6 φ4 42 with lozenge Without lozenge Work clamp U blank Feed plate blank 3 φ2 2 Needle hole plate ...

Page 63: ...tch Liquid cooling tank This helps to prevent thread breakages caused by friction when using synthetic threads Fill the tank with silicone oil 100 mm2 S Work clamp set QC The work clamp can be easily replaced by loosening the bolt and moving work clamp arm levers Solenoid thread wiper This wipes the thread independently of the work clamp operation Thread take up device This ensures a longer upper ...

Page 64: ...he position of the sensor perceive plate 48 Electrical trouble See 7 work clamp does not rise in the table in 10 12 2 86 Link does not return Electrical trouble See 8 Work clamp does not lower in the table in 10 12 2 86 Improper position of presser arm lever plate Distance between work clamp and needle plate top Adjust the work clamp lift stroke 43 Thread wiper obstructs needle Clearance between t...

Page 65: ...the thread take up spring Thread take up spring tension and height Adjust the tension and height of the thread take up spring 4 Damaged or burred rotary hook needle hole plate or needle Scratches or burrs File or replace the affected part Thread melting synthetic thread Thread end Use the thread cooling device Lower thread tension is too great Lower thread tension Adjust the tension of the lower t...

Page 66: ...ar lift stroke 41 Movable knife does not pick up the thread because of skipped stitches at the end of sewing Skipped stitches at the end of sewing See Skipped stitches occur Improper position of movable knife Movable knife position Adjust the position of the movable knife 44 Sub tension is insufficient Sub tension Turn the tension nut to adjust the tension Electrical trouble See 16 The thread trim...

Page 67: ...ufficient Lower thread tension Adjust the lower thread tension 4 Improper tension and height of thread take up spring Thread take up spring tension and height Adjust the tension and height of the thread take up spring 4 Improper tension and height of thread take up spring Thread take up spring tension and height Adjust the tension and height of the thread take up spring 4 Improper adjustment of su...

Page 68: ...ower is turned off Injury While the power is turned on the cooling fan of the control box operates be careful not to get caught in it When separating or rejoining connectors and measuring something be careful not to cut your fingers on metal parts such as heatsinks and covers 10 2 Components inside the control box and the operation panel The following are brief explanations of components inside th...

Page 69: ... A0 is displayed The machine motor does not turn Error E 20 is displayed The power lamp is not lit and nothing operates The power lamp is not lit and nothing operates No Fuse No 3 Fuse No 4 Fuse No 1 Fuse No 2 Main circuit board mounting side Front panel 10 3 Fuse explanation When replacing a fuse follow the instructions indicated in 10 12 Troubleshooting flowchart If a component on a PCB is damag...

Page 70: ...OL P6 YPM P7 XPM P11 UVW P12 DC300 P13 DC18 P19 FAN2 P14 AIR 10 4 Connectors Most of the machine trouble is due to connector problems including improper connection or insufficient contact Therefore be sure to check if each connector is correctly inserted and that there is no contact failure between pins and wires before starting troubleshooting procedures Connector positions Outside of the control...

Page 71: ...LK3 B430E Mark II 10 ELECTRIC MECHANISM 64 Power supply circuit board P5 DC300 P4 ACIN P3 DC18 P2 PER P1 POWER Panel PCB P1 ...

Page 72: ...rate correctly Error E A0 is displayed Sideways feed does not operate correctly Error E A0 is displayed Connector No and position Problem Main circuit board X home position sensor Y home position sensor Main circuit board Y pulse motor Main circuit board X pulse motor 2 Work clamp lifter and thread trimmer mechanisms The work clamp does not operate The machine does not operate The work clamp does ...

Page 73: ...t run Motor operation is unstable Needle up stop position is not correct Error E 20 is displayed Error E 50 is displayed The machine motor does not run Motor operation is unstable Needle up stop position is not correct Error E 20 is displayed Error E 50 is displayed The machine motor does not run Motor operation is unstable Needle up stop position is not correct Error E 20 is displayed Error E 50 ...

Page 74: ... E 70 is displayed Error E F1 is displayed Indication is strange Any switch does not have any effect The power lamp is not lit Connector No and position Problem 4 Others Main circuit board D C f a n motor Power supply circuit board Main circuit board Main circuit board Panel PCB ...

Page 75: ...utomatically when a split is found Displays the enlargement reduction ratio in millimeter units instead of as a percentage After changing this setting be sure to carry out the auto clear operation by referring to page 73 Enlargement of pattern size is not available Program number is fixed Switch 10 5 2 Setting the presser mode Through the combination of DIP switches A 1 and A 2 on the operation pa...

Page 76: ...DIP switches q All DIP switches are set to OFF at the time of ship ment NOTE When opening the cover hold it securely so that it does not fall down 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 sti...

Page 77: ...g emergency stop EMERGENCY STOP switch is available as an option The bar tacking stitches with a pitch of less than 1 mm are also enlarged and reduced Normally stitches with a pitch of less than 1 mm are not enlarged or reduced Test feeding will be performed at the same speed as that for actual sewing This is used for checking feeding operation After sewing is finished the work clamp automatically...

Page 78: ...ed from 8 to 14 stitches at the sewing start Sensitivity during sewing is three stitches memo 23 When DIP switch A 8 is simultaneously ON setting values changed using the operation panel are ignored memo 24 memo 2F memo 30 memo 31 memo 32 memo 33 memo 34 memo 35 memo 36 memo 37 memo 38 memo 39 memo 3A memo 3b memo 3c memo 3d memo 3E memo 3F memo 40 memo 4F Possible setting range 0 30 0 30 12 27 1 ...

Page 79: ...Y home position sensor ON when home position detected When SPEED indicator is illuminated Synchronizer 1 When COUNTER indicator is illuminated Presser sensor ON when presser is lowered 1 The synchronizer display simultaneously displays the needle up signal 3rd digit the 24 section signal 2nd digit and the needle down signal 1st digit H L L H when the sensor is on and L when the sensor is off Needl...

Page 80: ... 4 If the input voltage is normal the input voltage conditions will be shown in the display window t as indicated in the table above 5 Press the TEST switch e again to return the display to the normal condition 10 9 Clearing all memory settings If the sewing machine stops operating normally the cause may be that an incorrect memory setting may have been made by means of the memory switch for insta...

Page 81: ...PROM MT Indication B430EMK2 MN C B430EMK2 MT D03 SELECT PROGRAM NO RESET COUNTER X SCALE Y SCALE SPEED P TEST BOBBIN WIND P4 P3 P1 P2 B430E Mark Series POWER w e q 1 While pressing the TEST switch q turn on the power to the machine Version number of each PROM can be confirmed in display w 2 Every time the SELECT switch e on the panel is pressed until the TEST switch q is pressed again the indicati...

Page 82: ... ratio again If programming a new sewing data repeat the procedure from the beginning Press the RESET switch and specify a correct number Turn the pulley to align the index mark with the needle up stop position Refer to 6 17 Adjusting the needle up stop position Check the V belt tension Refer to 6 18 Installing the V belt Refer to 9 TROUBLESHOOTING Turn off the power and check the connection of pr...

Page 83: ...t board E E1 Press the RESET switch to reset the error However the data memory switches display and user programs will be reset to the backup data or initialized Corrupted EEPROM data or main PROM version has been upgraded E A0 E b0 E d0 E E0 E F0 E F1 E F2 Cause Home position cannot be detected malfunction of home position sensor or malfunction of power supply circuit board Remedy Turn off the po...

Page 84: ...be noted Special Note Requires selection of the course of action to follow using a yes or no decision making process Indicates the error status number in the first column of the problem solution and measures table and consequently the procedure to follow Indicates set up operation or present condition Indicates that the procedure to follow continues on the next page Note Be sure to set DIP switch ...

Page 85: ...switch NO When the home position varies without any strange sound When the error code E A0 appears on the display window When the position of presser foot does not move at all Note When the program you ordinarily use is not set the needle may hit the presser foot Special For machine with two pedal foot switches press the start pedal NO YES Note If you press the foot switch to the second position t...

Page 86: ... power Press the pedal to the first position Release the foot switch Press the test switch to turn off its indicator Press the foot switch to the second position and release it Turn off the power 13 Turn off the power 14 Turn off the power 15 Turn off the power 16 Turn off the power Turn on the power NO YES NO YES NO YES NO TES NO YES NO YES NO YES Special For machines with two pedal foot switches...

Page 87: ...r is turned on with the control box kept open In such a case be careful not to touch any place other than that for the measurement In addition always keep in mind that a high voltage remains for 5 minutes after the power is turned off Injury While the power is turned on the DC fan motor of the control box operates be careful not to get caught in it When separating or rejoining connectors and measu...

Page 88: ...4 ACIN connectors on the power supply circuit board and check there is continuity between pins 1 and 2 in the connector on the cable If there is no continuity replace the conversion transformer For 200 V 220 V and 230 V specifications this is not necessary Separate P4 ACIN connectors on the power supply circuit board turn on the power and measure the voltage across pins 1 and 2 in the connector on...

Page 89: ...it board is not defective c Rejoin P4 ACIN connectors on the power supply circuit board Separate P9 POWER connectors on the main circuit board turn on the power and measure the voltage across pins 1 and 3 in the connector on the cable If it is 5V the power circuit board is not defective After measurement turn off the power wait at least 5 minutes and then rejoin P9 connectors With P9 POWER connect...

Page 90: ...heck the PROM chip is attached to the main circuit board with letters MN and MT on the PROM chip and those on the main circuit board matching See 5 1 and 5 2 See 1 7 a Make sure that the power supply voltage of the wall socket is within 10 of the voltage specification b See 1 2 and 1 3 See 2 5 Check P2 PER connectors are attached to the power supply circuit board and P16 PER connectors are attache...

Page 91: ...r 0 Ω between pins 1 and 2 and pins 7 and 8 when pressing the foot switch to the second position the foot switch and its cord are not defective Rejoin the connector checked in 5 1 Open the control box and check P17 FOOT connectors for continuity between the following pairs of pins pins 1 and 2 and pins 3 and 4 in the connector on the main circuit board Do not separate P17 connectors Make sure the ...

Page 92: ...oor or the main circuit board is defective a Separate P6 YPM and P7 XPM connectors on the main circuit board Measure the resistance between the following pairs of pins pins 4 and 6 and pins 5 and 7 in the connector on the cable If the resistance is 2 3 Ω it is not defective After measurement rejoin P6 and P7 connectors b If item b causes no problem the main circuit board is defective Parts to be r...

Page 93: ...p sensor are plugged in d See 10 7 Checking the input sensor and DIP switch input to make sure that the work clamp sensor is connected If item b causes no problem and item c results in defective sensor input either the cord connection is poor or the main circuit board is defective a If it does not rise because of mechanical problem see 6 14 Adjusting the positions of the presser solenoid b Separat...

Page 94: ...maximum limits when the test switch is pressed the test lamp and its cord are not defective Measure the resistance between pins 1 and 12 with the same method as for 9 1 If the needle oscillates at its maximum limits the test lamp and its cord are not defective a See 5 b See 6 See 5 See 5 See 6 Parts to be replaced Panel PCB or panel cable assy Panel PCB or panel cable assy Main circuit board Error...

Page 95: ...hibited If the pointer indicates 10KΩ 30k Ω on the x 1k Ω range the main circuit board is not defective After measurement rejoin P12 connectors If the pointer does not fuses No 2 3 and 4 may be blown Examine them a Make sure that P2 SYNCHRO connector on the main circuit board and the synchronizer are plugged in b See 10 7 Checking the input sensor and DIP switch input to make sure that the synchro...

Page 96: ...repair adjust items of 16 2 and 16 3 Separate P5 SOL connectors on the main circuit board and then measure the resistance between pins 1 and 2 in the connector on the cable If the resistance is 7 8 Ω the solenoid is not defective With P5 SOL connectors plugged in on the main circuit board turn on the power perform sewing and measure the voltage across pins 1 and 2 in the connector on the cable If ...

Page 97: ...K a See 6 17 Adjusting the needle up stop position and 6 18 Adjusting the V belt tension for adjustment b If the pulley turns after the machine stops this is not an electrical problem See 14 1 See 13 1 With P13 DC18 connectors plugged in on the main circuit board measure the voltage in the connector on the cable If the voltage across the following pairs of pins pins 1 and 2 pins 4 and 5 and pins 1...

Page 98: ...ack Green Red Red White Black Red Black Red Black Red Black Red Black Red Black Red Black Red Black Red Black Power supply plug 1 2 CLAMP1 3 4 5 EARTH 6 7 8 START 9 Control box Green Yellow Operation panel CLAMP2 Red MOLEX 3191 02R1 5219 02A Gray Gray Red Gray Black 7 8 9 5V GKOS OSAE A Black White Red Blue Black Brown White Black Red X home position sensor Y home position sensor 3429 6002SCFL 3M ...

Page 99: ...SERVICE MANUAL BROTHER INDUSTRIES LTD NAGOYA JAPAN Printed in Japan 118 V30 I9100769B 1999 11 1 ...

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