KE-430B, 430C, 431B, 431C KE-432B, 432C, 433B KE-434B, 434C, 435B, 435C KE-436B, 436C, 484C BE-438B, 438C SERVICE MANUAL Please read this manual before using the machine. Please keep this manual within easy reach for quick reference.
This service manual is intended for KE-430B series, KE-430C series, BE-438B, BE-438C, KE-484C; be sure to read the KE-430B series, KE-430C series, BE-438B, BE-438C, KE-484C instruction manual before this manual. Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you start maintenance. As a result of research and improvements regarding this product, some details of this manual may not be the same as those for the product you purchased.
2. Notes on safety DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. CAUTION Environmental requirements Use the sewing machine in an area which is free from sources of strong electrical noise such as high-frequency welders. Sources of strong electrical noise may cause problems with correct operation.
CAUTION Sewing This sewing machine should only be used by operators who have received the necessary training in safe use beforehand. If using a work table which has casters, the casters should be secured in such a way so that they cannot move. The sewing machine should not be used for any applications other than sewing. Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, injury may result.
3. Warning labels The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. 2 1 Safety devices Eye guard Finger guard Thread take-up cover Thread take-up solenoid cover Belt cover Frame side cover, etc. High temperature warning display 3 4 Be sure to connect the ground.
CONTENTS 1. SPECIFICATIONS ............................... 1 3-16. Thread wiper mechanism.................................. 44 1-1. SPECIFICATIONS ........................................... 1 3-17. Thread nipper mechanism ................................ 47 1-2. Standard thread tension................................... 5 3-18. Thread take-up mechanism .............................. 49 2. MECHANICAL DESCRIPTIONS ......... 7 3-19. Thread trimmer mechanism ..............................
5. ADJUSTMENT..................................... 99 5-1. Adjusting the needle bar height........................ 99 5-2. Adjusting the needle bar lift amount ................. 100 5-24. Adjusting the home position.............................. 126 5-25. Adjusting the needle up stop position ............... 129 5-26. Adjusting the tension of the upper shaft timing 5-3. Adjusting the driver needle guard .................... 101 belt ...................................................................
1. SPECIFICATIONS １. SPECIFICATIONS １-１.
1. SPECIFICATIONS 1 2 Medium materials Heavy materials KE-435B Electronic lockstitch pattern tacker with stepping foot KE-434B Electronic lockstitch pattern tacker Stitch formation 2,500 rpm (Pitch 3 mm) 2,500 rpm 100 60 mm max. 0 - 6.4 0 - 6.4 mm Maximum pattern size R- intermittent feed mechanism (pulse-motor driven mechanism) Stitch length 0.1 - 10.
1. SPECIFICATIONS 1 2 7 Ordinary materials Denim Knitted materials 2 3 Bar tacking length 6 -14 mm Bar tacking length 14 -25 mm KE-430C Electronic lockstitch bar tacker Stitch formation Feed mechanism Stitch length 2,700 rpm 30 26 mm max. Work clamp lifter Work clamp height 2,500 rpm 30 10 mm max. 12 3 mm max. 0 - 6.4 0 - 6.4 mm R- intermittent feed mechanism (pulse-motor driven mechanism) 0.1 - 10.
1. SPECIFICATIONS 1 2 Medium materials Heavy materials KE-435C Electronic lockstitch pattern tacker with stepping foot KE-434C Electronic lockstitch pattern tacker Stitch formation Maximum sewing speed 100 60 mm max. R- intermittent feed mechanism (pulse-motor driven mechanism) 0.1 - 10.
1. SPECIFICATIONS １-２. Standard thread tension [KE-430B, 430C, 431B, 431C, 432B, 432C, 433B, 434B, 434C, 435B, 435C, 436B, 436C] Medium materials (Ordinary materials) Use Standard hook Heavy materials (Denim) Knitted materials Large hook Standard hook Large hook Standard hook #50 or equivalent #60 or equivalent ← #30 or equivalent #50 or equivalent ← #60 or equivalent ← #80 or equivalent 0.8 - 1.2 1.0 - 1.3 1.2 - 1.6 1.4 - 1.8 0.8 - 1.2 0.2 - 0.3 ← 0.2 - 0.3 ← 0.25 - 0.
1. SPECIFICATIONS １-２-１. Measuring tension Upper thread tension Lower thread tension 3564Q Thread take-up spring height 3565Q Thread take-up spring tension 1–2 mm 3566Q Measure the value when the thread take-up spring starts to extend. 3567Q * When the spring height (stroke) is great or the spring tension is insufficient, it may cause the thread end length to vary after thread trimming.
2. MECHANICAL DESCRIPTIONS ２. MECHANICAL DESCRIPTIONS The mechanisms operate in the order of the numbers given in the illustrations. ２-１. Needle bar and thread take-up mechanisms With stepping foot <3> Stepping foot connecting rod <4> Stepping foot arm <5> Stepping link assy <6> Presser bar lifter <7> Stepping foot 3240Q 40Q 7 KE-430B, 430C series 1. Pulley 2. Upper shaft 3. Thread take-up crank 4. Needle bar crank 5. Needle bar connecting rod 6. Needle bar clamp 7.
2. MECHANICAL DESCRIPTIONS KE-484C 1. Pulley 2. Upper shaft 3. Thread take-up crank 4. Needle bar crank 5. Needle bar connecting rod 6. Needle bar clamp 7.
2. MECHANICAL DESCRIPTIONS ２-２. Lower shaft and shuttle race mechanisms 1. Pulley 2. Upper shaft 3. Crank rod assy 4. Rock gear 5. Lower gear 6. Lower shaft 7. Driver 8. Shuttle hook 3242Q Q KE-484C 1. Pulley 2. Upper shaft 3. Timing pulley 4. Timing belt 5. Tension pulley arm 6. Lower shaft timing pulley 7. Lower shaft 8. Lower gear 9. Rotary hook shaft 10.
2. MECHANICAL DESCRIPTIONS ２-３. Work clamp lifter mechanism 3244Q 1. Work clamp solenoid 2. Plunger 3. Link assy, C 4. Link shaft, B 5. Link, B 6. Link shaft, C 7. Work clamp plate 8. Work clamp arm lever plate 9. Work clamp arm lever shaft 10.Work clamp arm lever 11.Work clamp * When the presser solenoid is turned off, the presser plate rises, and work clamps lower. KE-432B, 432C 3266Q BE-438B, 438C 7. Work clamp lifting rod 8. Work clamp lifter lever 9. Presser adjusting plate assy 10.
2. MECHANICAL DESCRIPTIONS 3245Q 45Q Pneumatic specifications 1. Air cylinder 2. Work clamp arm lever shaft 3. Work clamp arm lever 4.
2. MECHANICAL DESCRIPTIONS ２-４. Work clamp open-close mechanism (KE-432B, 432C) 1. Solenoid assy 2. OY solenoid pin 3. Sensor plate 4. Work clamp carrier rod assy 5. Lever 6. Roller 7. Work clamp carrier plate 8. Work clamp guide plate 9. Screw 10.
2. MECHANICAL DESCRIPTIONS ２-５. Thread wiper mechanism 3246Q When the presser solenoid is turned off, the presser plate rises, and thread wiper operates in the opposite direction. 1. Work clamp solenoid 2. Plunger 3. Link assy, C 4. Link shaft, B 5. Thread wiper driving lever 6. Thread wiper rod assy 7. Thread wiper arm assy 8. Thread wiper 3247Q Q Solenoid type thread wiper 1. Thread wiper solenoid 2. Thread wiper connecting rod assy 3. Thread wiper arm assy 4.
2. MECHANICAL DESCRIPTIONS Stepping foot specifications 1. Thread wiper solenoid 2. Thread wiper connecting rod assy 3. Thread wiper arm assy 4. Thread wiper 3248Q Q KE-484C 1. Thread wiper cylinder 2. Thread wiper connecting rod lever 3. Thread wiper connecting rod 4. Thread wiper arm assy 5.
2. MECHANICAL DESCRIPTIONS ２-６. Feed mechanism Sewing patterns are created through combinations of X and Y movements. KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C X direction 1. Pulse motor, X 2. Coupling hub, 6.35 3. Coupling spacer 4. Coupling hub, 8 5. Feed cam, X 6. Feed cam roller 7. X-feed lever 8. Tack length regulator block assy 9. Feed bracket 3250Q Y direction 1. Pulse motor, Y 2. Coupling hub, 6.35 3. Coupling spacer 4. Coupling hub, 8 5. Feed cam, Y 6. Feed cam roller 7.
2. MECHANICAL DESCRIPTIONS KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C X direction 1. Pulse motor, X 2. Coupling hub, 8 3. Coupling spacer 4. Coupling hub, 8 5. Feed cam, X 6. Feed cam roller 7. X-feed lever 8. Tack length regulator block assy 9. Feed bracket 3252Q Y direction 3253Q KE-430B, 430C series 1. Pulse motor, Y 2. Coupling hub, 8 3. Coupling spacer 4. Coupling hub, 8 5. Feed cam, Y 6. Feed cam roller 7. Y-feed lever 8. Tack width regulator block assy 9.
2. MECHANICAL DESCRIPTIONS ２-７. Thread trimmer mechanism 1. Thread trimmer solenoid 2. Driving lever push lever 3. Thread driving lever 4. Thread trimmer roller 5. Thread trimmer cam 6. Thread trimmer rod 7. Thread trimmer lever 8. Connecting rod lever assy 9. Thread trimmer connecting rod 10. Movable knife 11.
2. MECHANICAL DESCRIPTIONS KE-484C 1. Thread trimmer solenoid 2. Driving lever push lever 3. Thread driving lever 4. Thread trimmer roller 5. Thread trimmer cam 6. Thread trimmer rod 7. Thread trimmer lever 8. Thread trimmer rod, L 9. Thread trimmer connecting rod 10. Movable knife 11. Thread trimmer cylinder 12. Extension rod 13.
2. MECHANICAL DESCRIPTIONS ２-８. Thread nipper mechanism Manual operation 1. Lifting lever 2. Lifting crank 3. Tension release lever 4. Tension release stud 5. Tension release pin 3256Q In thread trimming 3257Q 1. Thread trimmer solenoid 2. Driving lever push lever 3. Thread driving lever 4. Tension release driving lever 5. Lower thread retainer collar 6. Thread trimmer cam 19 KE-430B, 430C series 7. Tension release driving lever 8. Tension release lever, U 9. Tension release rod assy 10.
2. MECHANICAL DESCRIPTIONS KE-484C 1. Tension release cylinder 2. Tension release pin push lever 3. Tension release pin, L 4.
2. MECHANICAL DESCRIPTIONS ２-９. Thread take-up mechanism 3259Q Stepping foot specifications 1. Thread take-up solenoid 2. Solenoid joint 3. Thread take-up lever crank 4. Thread take-up lever 3260Q 3261Q KE-484C 1. Thread take-up cylinder 2.
3. DISASSEMBLY ３. DISASSEMBLY CAUTION Disassembly should only be carried out by a qualified technician. Turn off the power switch before disassembly, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury. 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 can result.
3. DISASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C 3270Q 1. Top cover 2. Belt cover 3. Frame side cover 4. Bed cover, LF 5. Bed cover, LR 6. Bed cover, R 7. Eye guard assy 8. Bolts [2 pcs] 9. Face plate assy 10. Shuttle race cover assy 11. Auxiliary plate supports [2 pcs] 12. Needle plate auxiliary plate 13.
3. DISASSEMBLY ３-２. Work clamp arm mechanism (KE-430B, 430C, 431B, 431C) Be careful not to drop these three bearing balls when removing the work clamp arm assembly. 1. Set screw 2. Needle 3. Needle bar thread guide 4. Bolts [2 pcs] 5. Work clamp arm assy 6. Work clamp felt 7. Screws [2 pcs] 8. Feed plate 3271Q Be careful not to drop these two bearing balls when removing the feed bracket assembly. 9. Rubber cap 10. Set screw [Loosen] 11. Tack width feed shaft 12. Rod end 13. Screws [8 pcs] 14.
3. DISASSEMBLY ３-３. Work clamp arm mechanism (KE-432B, 432C) 3273Q Be careful not to drop these two bearing balls when removing the feed bracket assembly. Remove the feed bracket guide plate and the feed bracket assembly together as a single unit. 3274Q 1. Set screw 2. Needle 3. Needle bar thread guide 4. Bolt 5. Nuts [2 pcs] Adjusting screw Compression spring [Push upward and remove horizontally] 6. Set screws [2 pcs: Loosen] 25 7. Button clamp holder shaft 8. Work clamp arm assy 9. Bolts [2 pcs] 10.
3. DISASSEMBLY ３-４. Work clamp arm mechanism (KE-433B) Be careful not to drop these three bearing balls when removing the work clamp arm assembly. 1. Set screw 2. Needle 3. Needle bar thread guide 4. Bolts [2 pcs] 5. Work clamp arm assy 6. Work clamp felt 7. Bolts [2 pcs] 8. Feed plate 3275Q 9. Rubber cap 10. Set screw [Loosen] 11. Tack width feed shaft 12. Screws [8 pcs] 13. Feed bracket guide plate [Pull upward] 14. Screw 15. Cover support stand 16. Feed bracket cover 17. Set screw [Loosen] 18.
3. DISASSEMBLY ３-５. Work clamp arm mechanism (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C) KE-434B, 434C Solenoid specification 1. Set screw 2. Needle 3. Needle bar thread guide 4. Bolts [2 pcs: pneumatic spec. only] 5. Cylinder support [pneumatic spec. only] 6. Bolts [2 pcs] 7. Work clamp arm assy 8. Bolts [2 pcs] 9. Feed plate 10.
3. DISASSEMBLY 3278Q Tack width regulator block assy Y-feed lever 1) Turn the Y-feed lever forward as far as it will go. 2) Lift up feed bracket guide plate R and the feed bracket assembly together, remove the tack width regulator block assembly from the Y-feed lever, and pull all of them forward to remove them. 3279Q 11. Rubber cap 12. Set screw [Loosen] 13. Tack length regulator block assy 14. Retainer assys [2 pcs] 15. Spacers [2 pcs] 16. Screws [2 pcs] 17. Flat screws [2 pcs] 18.
3. DISASSEMBLY ３-６. Work clamp arm mechanism (BE-438B, 438C) 3280Q Be careful not to drop these two bearing balls when removing the feed bracket assembly. 3281Q Remove the feed bracket guide plate and the feed bracket assembly together as a single unit. 1. Set screw 2. Needle 3. Needle bar thread guide 4. Nuts [2 pcs] Adjusting screw Compression spring [Push upward and remove horizontally] 5. Set screws [2 pcs: Loosen] 6. Button clamp holder shaft 29 7. Button clamp holder 8. Bolts [2 pcs] 9.
3. DISASSEMBLY ３-７. Shuttle hook mechanism 3282Q 1. Bobbin case assy 2. Shuttle race base setting claw [Open to right and left] 3. Shuttle race base 4. Shuttle hook 3283Q KE-484C 1. Bobbin case assy 2. Screw 3. Hook stopper setting base 4. Set screw [Loosen] 5.
3. DISASSEMBLY ３-８. Needle bar mechanism 3285Q 3284Q 3286Q Do not remove the needle bar guide if possible to prevent the machine from overheating due to needle bar rubbing. 31 KE-430B, 430C series 1. Rubber cap 2. Screw 3. Needle bar 4. Slide block 5. Needle bar clamp [Pull out] 6. Rubber cap 7. Set screw [Loosen] 8. Wick [Pull out from arm] 9. Thread take-up support shaft 10. Thread take-up support 11. Oil cap 12. Set screw [Loosen] 13. Set screw [Loosen] 14. Needle bar connecting rod 15.
3. DISASSEMBLY ３-９. Stepping foot mechanism (KE-435B, 435C, 436B, 436C) Note: Remove the presser adjusting screw gently, as the presser bar spring guide and the presser bar spring may fly out at this time. Remove the stepping link assembly and the presser bar lifter together as a single unit. 1. Screw 2. Finger guard 3. Presser foot 4. Presser adjusting screw 5. Presser bar spring guide 6. Presser bar spring 7. Washer 8. Screw [Loosen] 9. Presser bar clamp 10. Cushion 11. Presser bar 12.
3. DISASSEMBLY ３-１０. Upper shaft mechanism 3288Q 3289Q 33 KE-430B, 430C series 1. Screw [Loosen] 2. Set screw [Loosen] 3. Thread take-up crank 4. Screws [2 pcs] 5. Thread trimmer solenoid 6. Screw 7. Wick support 8. Screws [2 pcs] 9. Crank rod (Upper part) 10. Crank rod (Lower part) [Lower downward］ 11. Set screws [2 pcs: Loosen] <11> Set screws [2 pcs: Loosen] 12. Set screws [2 pcs: Loosen] 13. Motor connector 14. Nut [Loosen] 15. Bolt [Loosen] 16. Bolts [3 pcs] 17.
3. DISASSEMBLY 3290Q KE-484C 3291Q 1. Screw [Loosen] 2. Set screw [Loosen] 3. Thread take-up crank 4. Screws [2 pcs] 5. Thread trimmer solenoid 6. Belt cover support pillars [2 pcs] 7. Screws [4 pcs] 8. Blind plate 9. Frame side cover 10. Setting plate packing 11. Nut 12. Plain washer 13. Nuts [2 pcs: Loosen] 14. Adjusting screw [Loosen] 15. Adjusting screw [Loosen] 16. Tension pulley arm 17. Set screws [2 pcs: Loosen] 18. Set screws [2 pcs: Loosen] 19. Set screws [2 pcs: Loosen] 20.
3. DISASSEMBLY ３-１１. Lower shaft mechanism Tilt the machine head. 3292Q KE-430C series BE-438C KE-430B series BE-438B Remove the rock gear and the crank rod together as a single unit. 3293Q 1. Support [Turn in the direction of the arrow] 2. Felt holder 3. Bolt [Loosen] 4. Driver 5. Retaining ring 6. Set screws [2 pcs: Loosen] 7. Lower shaft assy [Pull out from the rear of the machine] 8. Set screw collar 35 KE-430B, 430C series 9. Set screws [2 pcs: Loosen] 10. Wick [Untie the knot] 11.
3. DISASSEMBLY 3294Q KE-484C Tilt the machine head. Note: This part consists of three smaller parts which should not be disassembled. 1. Set screw [Loosen] 2. Lower gear 3. Set screws [2 pcs: Loosen] 4. Rotary hook shaft 5. Set screw collar 6. Lower shaft gear spacer 7. Thrust bearing 8. Set screw [Loosen] 9. Wick [Untie the knot] 10. Lower shaft [Pull out from the rear of the machine] 11. Lower shaft timing pulley 12.
3. DISASSEMBLY ３-１２. Feed mechanism (1) KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C Tilt the machine head. Return the machine head to its original position. 3296Q If the tack width feed lever shaft cannot be removed, remove the retaining ring. Retaining ring 3297Q Oil supply hole 3298Q 37 1. Set screws [2 pcs: Loosen] 2. Set screw collar 3. Set screw [Loosen] 4. Tack width feed lever shaft (with retaining ring) [Pull upward] 5. Thrust washer 6.
3. DISASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C Tilt the machine head. Return the machine head to its original position. 3296Q If the tack width feed lever shaft cannot be removed, remove the retaining ring. Retaining ring 3299Q Oil supply hole 3300Q 1. Set screws [2 pcs: Loosen] 2. Set screw collar 3. Set screw [Loosen] 4. Tack width feed lever shaft (with retaining ring) [Pull upward] 5. Thrust washer 6. Wicks [3 pcs: Pull out from oil supply hole] 7.
3. DISASSEMBLY ３-１３. Feed mechanism (2) 3301Q KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C 1. Bolts [4 pcs] 2. Pulse motor assy, X [Disconnect the harness] 3. Bolts [4 pcs] 4. Pulse motor assy, Y [Disconnect the harness] 5. Coupling spacer 6. Set screws [2 pcs: Loosen] 7. Coupling hub, 6.35 8. Screws [2 pcs] 9. Feed cam bracket 10. Positioning pins [2 pcs] 11. Screw 12. Feed home position dog 13. Set screws [2 pcs: Loosen] 14. Coupling hub, 8 15. Set screws [2 pcs: Loosen] 16.
3. DISASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C 3303Q 3304Q 1. Bolts [4 pcs] 2. Pulse motor assy, X [Disconnect the harness] 3. PM bracket, X 4. Ball bearing 5. Bolts [4 pcs] [3 pcs: KE-484C] 6. Pulse motor assy, Y [Disconnect the harness] 7. Set screws [2 pcs: Loosen] 8. Set screw collar 9. PM bracket, Y 10. Ball bearing 11. Screws [2 pcs] 12. Y-feed cam bracket KE-430B, 430C series 13. Positioning pins [2 pcs] 14. Set screws [2 pcs: Loosen] 15. Coupling hub, 8 16. Coupling spacer 17.
3. DISASSEMBLY ３-１４. Work clamp lifter mechanism (Solenoid specifications) KE-430B, 431B, 433B, 434B KE-430C, 431C, 434C 1. Springs [2 pcs] 2. Screws [2 pcs] 3. Guide 4. Snap pins [2 pcs] 5. Rubber cap 6. Link shaft, D [Pull out] 7. Set screws [2 pcs: Loosen] 8. Snap pins [2 pcs] 9. Link shaft, A [Pull out] 10. Washers [2 pcs] Be careful not to drop. 3305Q 3306Q 11. Oil cap 12. Snap pin 13. Link shaft, C [Pull out] 14. Work clamp plate 15. Work clamp lifter link-related parts 16.
3. DISASSEMBLY KE-432, 432C BE-438, 438C 1. Springs [2 pcs] 2. Screws [2 pcs] 3. Guide 4. Snap pins [2 pcs] 5. Rubber cap 6. Link shaft, D [Pull out] 7. Set screws [2 pcs: Loosen] 8. Snap pins [2 pcs] 9. Link shaft, A [Pull out] 10. Washers [2 pcs] Be careful not to drop. 3308Q 11. Oil cap 12. Snap pin 13. Link shaft, C [Pull out] 14. Presser lifter link-related parts 15. Set screw [Loosen] 16. Button clamp lever shaft [Pull out] 17.
3. DISASSEMBLY ３-１５. Stepping foot lifter mechanism (KE-435B, 435C, 436B, 436C) 3310Q 1. Retaining ring 2. Plain washer 3. Screws [4 pcs] 4.
3. DISASSEMBLY ３-１６. Thread wiper mechanism Solenoid specifications 3311Q 3312Q Work clamp lever lifter shaft Remove the thread wiper rod assembly from the work clamp lever lifter shaft, and then lift it up together with the thread wiper driving lever to remove them. KE-430B, 430C series 1. Screw 2. Plain washer 3. Thread wiper 4. Retaining ring 5. Set screw [Loosen] 6. Thread wiper arm assy [Pull downward] 7. Set screw [Loosen] 8. Thread wiper shaft 9. Retaining ring 10.
3. DISASSEMBLY Pneumatic specifications 3313Q 1. Screw with washer 2. Lifting lever 3. Plunger pin 4. Bolts [2 pcs] 5. Solenoid box assy [Disconnect the harness] 6. Screws [2 pcs] 7. Thread wiper connecting rod assy 8. Set screw [Loosen] 9.
3. DISASSEMBLY Stepping foot specifications 3314Q 1. Plunger pin 2. Bolts [2 pcs] 3. Solenoid box assy [Disconnect the harness] 4. Set screw [Loosen] 5. Thread wiper connecting rod assy KE-484C 3315Q 1. Screw 2. Bolts with washers [2 pcs] 3. Bolts [2 pcs] 4. Cylinder box [Disconnect the harness] 5. Set screw [Loosen] 6.
3. DISASSEMBLY ３-１７. Thread nipper mechanism 3316Q 1. Set screw 2. Thread tension assy [Pull out] 3. Tension release pin 4. Tension release stud 5. Shoulder screw 6. Shoulder screw 7. Tension release rod assy 8. Driving lever push lever 9. Set screw [Loosen] 47 10. Work clamp lever lifter shaft 11. Collar 12. Tension release lever 13. Screw with washer 14. Lifting lever 15. Screw [KE-434B, 434C Pneumatic spec.] 16. Tension release rod [KE-434B, 434C Pneumatic spec.] 17.
3. DISASSEMBLY 3317Q Stepping foot specifications 1. Set screw 2. Thread tension assy [Pull out] 3. Tension release pin 4. Tension release pin, L 5. Shoulder screw 6. Shoulder screw 7. Tension release rod assy 8. Driving lever push lever 9. Screw 10. Tension release bracket 3318Q KE-484C 1. Set screw 2. Thread tension assy [Pull out] 3. Tension release pin 4. Tension release pin, L 5. Tension release cylinder assy 6. Rubber cap 7. Set screw [Loosen] 8. Lever shaft 9.
3. DISASSEMBLY ３-１８. Thread take-up mechanism 1. Screws [2 pcs] 2. Solenoid setting plate 3. Spring 4. Set screws [2 pcs: Loosen] 5. Solenoid joint 6. Screw 7. Spring washer 8. Plain washer 9. Nut 10. Shoulder screws [2 pcs] 11. Thread take-up lever 12. Retaining ring 13. Thread take-up lever crank 14.
3. DISASSEMBLY 3321Q KE-484C 1. Pin 2. Screws [2 pcs] 3. Setting plate 4. Shoulder screws [2 pcs] 5.
3. DISASSEMBLY ３-１９. Thread trimmer mechanism Be careful not to drop. Return the machine head to its normal position, and then remove the connecting rod lever assembly and the thread driving lever assembly. Be careful not to drop. 3322Q Tilt the machine head. 3323Q 51 KE-430B, 430C series 1. Rubber cap 2. Set screw [Loosen] 3. Lever shaft 4. Rubber cap 5. Set screw [Loosen] 6. Retaining ring 7. Driving lever guide shaft [Pull out] 8. Cushion 9. Thread release driving lever assy 10. Washer 11.
3. DISASSEMBLY 3324Q KE-484C Be careful not to drop. Return the machine head to its normal position, and then remove the thread trimmer rod L and the thread driving lever assembly. Tilt the machine head. 3325Q KE-430B, 430C series 1. Rubber cap 2. Set screw [Loosen] 3. Lever shaft 4. Rubber cap 5. Set screw [Loosen] 6. Retaining rings [2 pcs] 7. Driving lever guide shaft [Pull out] 8. Cushion 9. Washer 10. Spring 11. Spring 12. Bolts [2 pcs] 13. Thread trimmer cylinder 14. Nuts [2 pcs] 15.
3.
4. ASSEMBLY ４. ASSEMBLY Assemble each part in order of the numbers. Apply grease to the required places when reassembling the parts and once every two years. ４-１. Thread trimmer mechanism (1) 3329Q Install the retaining ring between the thread release driving lever assembly and the washer. Apply grease. 3328Q Place the cushion against the edge of the arm, set the various parts so that there is no gap between them as shown in the illustration, and then tighten the set screw as far as the screw stop.
4. ASSEMBLY 3332Q KE-484C Install the retaining ring between the thread driving lever assembly and the washer. Apply grease. 3331Q Place the cushion against the edge of the arm, set the various parts so that there is no gap between them as shown in the illustration, and then tighten the set screw as far as the screw stop. Adjust the position of the thread driving lever assembly while referring to “5-20. Adjusting the position of the thread trimming link mechanism”. Apply grease.
4. ASSEMBLY ４-２. Thread nipper mechanism Solenoid specifications Apply grease. Apply grease. Driving lever stopper Install the driving lever push lever and the tension release lever U to the driving lever stopper with the shoulder screw. After installing the lifting lever, check that it moves smoothly. 3334Q 1. Presser bar lifter crank 2. Lifting lever 3. Screw with washer 4. Work clamp lever lifter shaft 5. Tension release lever 6. Collar 7. Tension release rod assy 8. Shoulder screw 9.
4. ASSEMBLY Pneumatic specifications Install the driving lever push lever and the tension release lever U to the driving lever stopper with the shoulder screw. Apply grease. Apply grease. Driving lever stopper After installing the lifting lever, check that it moves smoothly. Adjust the thread take-up spring height while referring to “1-2. Standard thread tension”. 3335Q 3336Q Tighten the set screw while lightly pressing the work clamp lever lifter shaft. 57 1. Presser bar lifter crank 2.
4. ASSEMBLY Stepping foot specifications Apply grease. Apply grease. Driving lever stopper 1. Tension release bracket 2. Screw 3. Tension release rod assy 4. Shoulder screw 5. Driving lever push lever 6. Tension release lever, U 7. Shoulder screw 8. Tension release pin, L 9. Tension release pin 10. Thread tension assy 11. Set screw Adjust the thread take-up spring height while referring to “1-2. Standard thread tension”.
4. ASSEMBLY ４-３. Thread wiper mechanism After installing the thread wiper, moved the forked part of the thread wiper driving lever and check that the thread wiper unit moves smoothly. Note: If the thread wiper unit does not move smoothly, error E-60 may be displayed. Solenoid specifications 3339Q Adjust while referring to “5-17. Adjusting the thread wiper”. Tighten the set screw while lightly pressing the work clamp lever lifter shaft.
4. ASSEMBLY Pneumatic specifications When installing the solenoid box assembly, pass the tension release rod through the hole. Adjust while referring to “5-17. Adjusting the thread wiper”. After installing the plunger pin, push the thread wiper connecting rod assembly up and check that the thread wiper unit moves smoothly. 3342Q 1. Thread wiper arm assy 2. Set screw [Temporarily tighten] 3. Thread wiper connecting rod assy 4. Screws [2 pcs] 5. Solenoid box assy 6. Washers [2 pcs] 7. Bolts [2 pcs] 8.
4. ASSEMBLY Stepping foot specifications 3343Q Adjust while referring to “5-17. Adjusting the thread wiper”. After installing the face plate while referring to “4-21. Covers”, install the bolts, and then push the thread wiper connecting rod assembly up and check that the thread wiper unit moves smoothly. 1. Thread wiper connecting rod assy 2. Set screw [Temporarily tighten] 3. Solenoid box assy 4. Washers [2 pcs] 5. Bolts [2 pcs] 6. Plunger pin 7. Bolts [2 pcs: Install to face plate] KE-484C 3344Q 1.
4. ASSEMBLY ４-４. Thread take-up mechanism 3345Q Attach the spring to spring hooks (A) and (B). 1) Provisionally install the solenoid joint to the thread take-up solenoid with the set screws. 2) Place the solenoid joint onto the thread take-up lever crank so that the flat surface is against the flat part of the thread take-up crank, and then install the solenoid setting plate to the machine head. Apply grease.
4. ASSEMBLY 3348Q Stepping foot specifications Attach the spring to spring hooks (A) and (B). 1) Provisionally install the solenoid joint to the thread take-up solenoid with the set screws. 2) Place the solenoid joint onto the thread take-up lever crank so that the flat surface is against the flat part of the thread take-up crank, and then install the solenoid setting plate to the machine head. Apply grease.
4. ASSEMBLY 3350Q KE-484C 1. Thread take-up lever 2. Shoulder screws [2 pcs] 3. Setting plate 4. Screws [2 pcs] 5. Pin 6.
4. ASSEMBLY ４-５. Work clamp lifter mechanism (Solenoid specifications) When assembling, apply grease to the required places while referring to “4-5-1. Applying grease”. KE-430B, 431B, 433B, 434B KE-430C, 431C, 434C Secure link shaft, A using the set screw so that link, B (8) is centered in the bush. 3351Q 1. Work clamp lifter link-related parts [Insert from above the arm] 2. Link shaft, B [Place into the forked section of the thread wiper driving lever (2)] 3.
4. ASSEMBLY Tighten the screws so that the presser solenoid assembly protrudes by 110.0 ± 0.2 mm from the edge of the arm. 3352Q Seen from above 3353Q Lastly, move the work clamp lifer link-related parts by hand and check that they move smoothly. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20.
4. ASSEMBLY When assembling, apply grease to the required places while referring to “4-5-1. Applying grease”. KE-432B, 432C BE-438B, 438C Secure link shaft A using the set screw so that link B (10) is centered in the bush. 1. Work clamp lifter link-related parts [Insert from above the arm] 2. Link shaft, B [Place into the forked section of the thread wiper driving lever (2)] 3. Link shaft, A [Pass through the washer and link A (3)] 4.
4. ASSEMBLY Tighten the screws so that the presser solenoid assembly protrudes by 110.0 ± 0.2 mm from the edge of the arm. 3355Q Seen from above 3356Q Lastly, move the work clamp lifer link-related parts by hand and check that they move smoothly. 16. Link shaft, D 17. Snap pins [2 pcs] 18. Guide 19. Screws [2 pcs] 20. Springs [2 pcs: Hook onto link shaft B and the grooved pins (20)] 21. Oil cap 22. Rubber cap 23. Work clamp lifter lever［KE-432B, 432C］ Button clamp lifting lever［BE-438B, 438C］ 24.
4. ASSEMBLY ４-５-１. Applying grease If the work clamp does not move up and down smoothly, error E-60 may be displayed. Check that the mechanism moves smoothly and also apply grease to all sliding parts during assembly. 3357Q 1. Sliding portions of link shaft, C [1], link, B [2], and work clamp plate (work clamp lifting rod: KE-432B, 432C, BE-438B, 438C) [3] 2. Sliding portions of link shaft, B [4], link, B [2], link, A [5] and link assy, C [6] 3.
4. ASSEMBLY ４-６. Feed mechanism (1) KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C Feed cams X and Y both have index marks. Check these when using. 3358Q Assembly steps of the feed mechanism are the same for X and Y directions. Tighten the set screw in the illustration at the screw stop position. Set screw at screw stop 3359Q Check that the feed cam turns smoothly.
4. ASSEMBLY Assembly steps of the feed mechanism are the same for X and Y directions. 3364Q Apply grease. Apply grease. Apply grease. Place the coupling coupling hub 8. Place the feed cam bracket onto the positioning pins, and then install with the screws. 3363Q Set the coupling hub at the angle for inserting the coupling spacer, and install the pulse motor to the machine bed. * Make sure that the harness faces correctly. 3365Q 71 spacer onto 11. Coupling spacer 12. Positioning pins [2 pcs] 13.
4. ASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C Feed cams X and Y both have index marks. Check these when using. 3367Q Assembly steps of the feed mechanism are the same for X and Y directions. Align the edges of coupling hub 8 and the cam shaft. X direction 3368Q Place the cam onto the cam shaft so that there is no play in the cam, and then tighten the set screws.
4. ASSEMBLY Apply grease. 1) Place the coupling spacer onto coupling hub 8. 2) Set coupling hub 8 on the pulse motor shaft at the angle for inserting the coupling spacer, and install the pulse motor to the machine bed. * Make sure that the harness faces correctly. Apply grease. 3370Q While pressing the set collar, tighten the set screw at the screw stop position. Apply grease. 10. Ball bearing [Insert into the bed] 11. Coupling spacer 12. Pulse motor assy, X 13. PM bracket, X 14. Bolts [4 pcs] 15.
4. ASSEMBLY ４-７. Feed mechanism (2) Install home position sensors X and Y so that there is a gap of 0.5–0.9 mm between the sensors and the feed home position dog. KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C Feed home position dog Push the home position sensor Y cable into the recess. 3374Q Oil supply hole 3373Q Feed home position dog 3372Q Note: Make sure the wick does not touch the connecting rod lever.
4. ASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C Home position dog, X Home position sensor X 3379Q Push the home position sensor Y cable into the recess. Install the X-sensor setting base so that there is a gap of 0.5–0.9 mm between the sensing surface of home position sensor X and the home position dog X. 3378Q Oil supply hole 3377Q Note: Make sure the wick does not touch the connecting rod lever.
4. ASSEMBLY ４-８. Upper shaft mechanism Push the thread trimmer cam onto the upper shaft crank, align the forward set screw in the rotation direction with the screw stop position, and tighten the set screw at that position. Rotation direction 3380Q Apply grease. Apply grease. Apply grease. Upper shaft bush Place the thread take-up crank onto the upper shaft from the face plate end, tighten the screw into the hole in the upper shaft, and then tighten the set screw.
4. ASSEMBLY KE-484C Make a gap of 3 mm between the thread trimmer cam and U-timing pulley F. Align the ridge line at the back of the groove in the upper shaft with the edge of the thread trimmer cam. 3384Q Apply adhesive (Threebond 1401 or similar) to the outside of the bearing. Apply grease. Apply grease. Upper shaft bush Place the thread take-up crank onto the upper shaft from the face plate end, tighten the screw into the hole in the upper shaft, and then tighten the set screw.
4. ASSEMBLY 3386Q 20. Setting plate packing 21. Frame side cover 22. Blind plate 23. Screws [4 pcs] 24. Belt cover support pillars [2 pcs] 25. Synchronizer assy 26. Screws [2 pcs] 27. Timing pulley assy, U 28. Set screws [2 pcs] 3387Q 3382Q Make a gap of 1.0 mm between the magnet of timing pulley assembly U and the synchronizer assembly, and then align the rear set screw in the rotation direction of timing pulley assembly U with the screw stop position and tighten the set screw at that position.
4. ASSEMBLY ４-９. Stepping foot lifter mechanism (KE-435B, 435C, 436B, 436C) 3388Q Install the air cylinder setting plate so that there is a distance of 42.8–43.3 mm between section A of the work clamp lifter lever and the top of the presser bar bush when section A is at its lowest point. Work clamp lifter lever Presser bar bush 3389Q 1. Stepping link, A 2. Plain washer 3. Retaining ring 4. Air cylinder setting plate 5.
4. ASSEMBLY ４-１０. Stepping foot mechanism (KE-435B, 435C, 436B, 436C) Insert the presser bar spring and the presser bar spring guide into the top of the machine head, pass them through the washer, and then place them onto the presser bar. 3390Q Adjust while referring to “5-16. Changing the work clamp lift”. Adjust while referring to “5-15. Work clamp adjustment”.
4. ASSEMBLY ４-１０-１. Adjusting the lowest point of the presser foot Carry out the steps in “4-11. Needle bar mechanism” before making this adjustment. 3506Q 3507Q Index marks 3509Q 3508Q 1. Loosen the set screw (1). 2. Turn the machine pulley to raise the needle bar from its lowest position until reference line B (the lowest reference line on the needle bar) or reference line b (second reference line from the top) is aligned with the lower edge of the needle bar bush (2). 3.
4. ASSEMBLY ４-１１. Needle bar mechanism Oil supply hole 3392Q Align the set screw with the screw stop. Press the thread take-up support shaft gently while tightening the set screw. 3393Q Apply grease. After securing the needle bar, position the needle bar guide so that the machine pulley turns smoothly, and then tighten the screws. Apply grease. Apply grease. Fit the chamfering side of the slide block into the groove on the needle bar guide.
4. ASSEMBLY ４-１２. Lower shaft mechanism Clamp the rock gear with the stepped part of the rock gear shaft and the set screw collar so that there is no play in the rock gear, and then tighten the set screws. 3396Q Engage the lower shaft gear with the rock gear. Apply grease. KE-430C series BE-438C Lower shaft bush Apply grease. KE-430B series BE-438B Set the needle bar to its lowest position and then insert the lower shaft with this screw stop facing straight downward.
4. ASSEMBLY While turning the machine pulley, move the rock gear to the left and right to find the position where it moves smoothly. Then without moving the rock gear, turn the rock gear shaft so that there is a gap of 0.05--0.12 mm at the end of the driver, and tighten the set screws. * Check that the machine pulley turns smoothly. 3400Q 3399Q Place the upper shaft timing belt onto the upper shaft pulley and the motor pulley. Carry out the steps in “5-26.
4. ASSEMBLY KE-484C 3402Q 3403Q Carry out the steps in “5-26. Adjusting the tension of the upper shaft timing belt” before tightening. Place the upper shaft timing belt onto the upper shaft pulley and the motor pulley. 3404Q 85 1. Lower shaft [Insert from the rear of the machine head] 2. Lower shaft timing pulley 3. Thrust bearing 4. Lower shaft gear spacer 5. Wick [Pass through the lower shaft and make a knot] 6. Set screw 7. U-timing belt, F [Place onto the lower shaft timing pulley] 8.
4. ASSEMBLY ４-１３. Thread trimmer mechanism (2) 1) Place the thread connecting rod onto the pin of the connecting rod lever assembly, and then install the needle plate with flat screws and screws so that the needle is at the center of the needle hole. Connecting rod lever 3405Q Connecting rod lever assy 3406Q 2) Turn the machine pulley to set the needle to its lowest position.
4. ASSEMBLY ４-１４. Shuttle hook mechanism 3412Q 3411Q After installing the shuttle hook, carry out the adjustments in “5-2. Adjusting the needle bar lift amount”, “5-3. Adjusting the driver needle guard” and “5-4. Adjusting the needle clearance”. 1. Needle bar thread guide 2. Needle 3. Set screw 4. Shuttle hook 5. Shuttle race base 6. Bobbin 7. Bobbin case assy 8. Felt holder 9.
4. ASSEMBLY KE-484C 3423Q Approx. 0.8mm Shuttle hook Bobbin case holder position bracket 3422Q Install the hook stopper setting base so that the distance from the tip of the bobbin case holder position bracket to the needle drop surface is approximately 0.8 mm. 3424Q 3425Q Tip of the rotary hook Set screws Turn the machine pulley to align the tip of the rotary hook with the needle center line.
4. ASSEMBLY ４-１５. Work clamp arm mechanism (KE-430B, 430C, 431B, 431C) Align with the screw stop and push down from above while tightening the set screw. Be careful not to drop these two ball bearings when installing the feed bracket assembly. Tack length feed slide block 3426Q Be careful not to drop these three ball bearings when installing the work clamp arm assembly.
4. ASSEMBLY ４-１６. Work clamp arm mechanism (KE-432B, 432C) Align with the screw stop and push down from above while tightening the set screw. Be careful not to drop these two ball bearings when installing the feed bracket assembly. Place the tack length feed slide block into the groove of the feed bracket assembly, and then use the screws to install it together with the feed bracket guide plate. Tack length feed slide block 3426Q Refer to “4-20.
4. ASSEMBLY ４-１７. Work clamp arm mechanism (KE-433B) 3429Q Install parts 1 to 6, clamp them using parts 7 and 8 so there is no play in them, and tighten the set screw 9. Note: Install so that the two ball bearings of the feed bracket guide shaft assembly do not fit into the holes in the feed bracket guide plate. Be careful not to drop these three ball bearings when installing the work clamp arm assembly.
4. ASSEMBLY ４-１８. Work clamp arm mechanism (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C) Align with the screw stop and push down gently from above while tightening the set screw. Y-feed lever 3431Q 1) Turn the Y-feed lever forward as far as it will go. 2) Insert the tack width regulator block assembly and the feed guide slide block into the grove in feed bracket guide plate R so that they face as shown in the illustration, and then install the feed bracket assembly and feed bracket guide plate R.
4. ASSEMBLY Refer to “4-20. Work clamp arm mechanism (Applying grease)” 3433Q Work clamp arm assembly installation position (A) When using solenoid-type work clamp S Pneumatic-type (B) When using solenoid-type work clamp L Refer to “4-20. Work clamp arm mechanism (Applying grease)” 3435Q 3434Q Carry out the adjustment in “5-24. Adjusting the home position” before installing the feed plate. 11. Feed bracket cover 12. Feed plate 13. Plain washers [2 pcs] 14. Bolts [2 pcs] 15. Work clamp arm assy 16.
4. ASSEMBLY ４-１９. Work clamp arm mechanism (BE-438B, 438C) Be careful not to drop these two ball bearings when installing the feed bracket assembly. Align with the screw stop and push down from above while tightening the set screw. Tack length feed slide block 3426Q Place the tack length feed slide block into the groove of the feed bracket assembly, and then use the screws to install it together with the feed bracket guide plate. Refer to “4-20. Work clamp arm mechanism (Applying grease)” 1.
4. ASSEMBLY ４-２０. Work clamp arm mechanism (Applying grease) Check that the mechanism moves smoothly and also apply grease to all sliding parts during assembly. If the work clamp does not move up and down smoothly, error E-60 may be displayed. (for solenoid specifications) [KE-430B, 430C, 431B, 431C, 433B, 434B/434C solenoid specifications] ＜KE-431B, KE-431C＞ 3438Q 3437Q 1. Sliding portion of the work clamp (1) (Apply small amount of grease.) 2.
4. ASSEMBLY [KE-432B, 432C] Apply grease to the portions indicated by the arrows. 3440Q [BE-438B, 438C] Apply grease to the portions indicated by the arrows.
4. ASSEMBLY ４-２１. Covers KE-430B, 431B, 432B, 433B, BE-438B KE-430C, 431C, 432C, BE-438C Provisionally tighten this screw, and then fully tighten it after installing the belt cover. 3442Q Insert this part of the belt cover into the upper cover, install it with the two screws, and then tighten the upper cover screw. 3443Q 97 KE-430B, 430C series 1. Shuttle race cover assy 2. Plain washers [2 pcs] 3. Wave washers [2 pcs] 4. Shoulder screws [2 pcs] 5. Face plate assy 6. Screws [3 pcs] 7.
4. ASSEMBLY KE-434B, 435B, 436B KE-434C, 435C, 436C, 484C Provisionally tighten this screw, and then fully tighten it after installing the belt cover. 3444Q 1) Insert horizontally from the front so that the X-feed lever cover is on top. X-feed lever cover 2) Loosen the four screws and make fine adjustments to the height of the needle plate auxiliary plate so that it is at the same height as the needle plate.
5. ADJUSTMENT ５. ADJUSTMENT CAUTION Maintenance and inspection of the sewing machine should only be carried out by a qualified technician. Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system. Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.
5. ADJUSTMENT ５-２. Adjusting the needle bar lift amount 3413Q 0135Q Needle center line Tip 2464Q 3200Q Wick Support Felt Felt Felt holder Turn the support in the direction of the arrow, and remove the felt holder. When returning the felt support, place it as shown in the illustration so as not to clamp the felt, and then gently press the felt and the wick.
5. ADJUSTMENT ５-３. Adjusting the driver needle guard * The KE-484C does not have a driver needle guard. Needle center line Tip 0135Q 2555Q 2556Q Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw (2) and turn the eccentric shaft (3) to adjust so that the driver needle guard (1) contacts the needle. If the needle contact pressure is too great, skipped stitches may occur.
5. ADJUSTMENT ５-５. Adjusting the shuttle race thread guide The position of the shuttle race thread guide is adjusted at the time of shipment from the factory. It should not be changed if at all possible. * The KE-484C does not have a shuttle race thread guide. 3452Q 3562Q 1. Remove the arm assembly (1), the feed plate (2) and the needle plate (3). Remove the button clamp assembly (1), the feed plate (2) and the needle plate (3). [BE-438B, 438C] 2.
5. ADJUSTMENT ５-６. Adjusting the clearance between the shuttle hook and bobbin case holder position bracket (KE-484C) Approx. 0.8mm 3453Q Loosen the screw (3) and move the hook stopper setting base (4) to adjust so that the tip of the bobbin case holder position bracket (1) is approximately 0.8 mm away from the needle drop surface.
5. ADJUSTMENT ５-７. Adjusting the work clamp lift amount (KE-430B, 430C, 431B, 431C, 433B) The maximum work clamp lift amount is 17 mm from the top of the needle plate. The lift amount for each model is adjusted as shown in the table at the time of shipment. 0151Q 2566Q 17mm max. KE-430B, 430C spec. Lift amount -1, -5 +1 0 10 mm -2 +1 0 14 mm KE-431B, 431C -7 +1 0 9 mm -2, -3 +1 0 10 mm KE-433B -1 +1 0 10 mm -2 +1 0 14 mm -7 +1 0 9 mm 1.
5. ADJUSTMENT ５-９. Adjusting the work clamp lift amount (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C) Work clamp lifter Solenoid type Pneumatic type Pneumatic type (inner clamping device) Max. lift amount from the top of the needle plate 17mm 25mm 17mm The lift amount is adjusted as shown in the table at the time of shipment. KE-434B, 434C, 435B, 435C, 436B, 436C Uses Medium materials Lift amount +1 0 10 mm Heavy materials +1 0 14 mm KE-484C 17mm [Solenoid type] 17mm max.
5. ADJUSTMENT ５-１０. Adjusting the button clamp lift amount (BE-438B, 438C) The maximum button clamp lift amount is 13 mm from the top of the needle plate. The lift amount is adjusted 10 +10 mm at the time of shipment. max. 2666Q Remove the button clamp presser spring (1), loosen the screw (2) and adjust the button clamp holder hook (3) by moving it up and down. * If the button clamp cannot be raised or lowered, error code “E-61” or “E-63” will be displayed.
5. ADJUSTMENT ５-１１. Work clamp pressure adjustment (KE-432B, 432C) Loosen the lower adjusting ring (1) as much as possible (to the extent that the material being sewn does not slip and alter the pattern). Then, adjust the pressure by turning the upper adjusting ring (2). 2569Q Removal of the work clamp spring Lower the work clamp, then place the adjusting ring (3) in the hole of the frame, remove the tip of the adjusting screw from the lever holder (4), and remove the work clamp spring (5). 2570Q ５-１２.
5. ADJUSTMENT ５-１３. Work clamp closing-distance adjustment (KE-432B, 432C) 0.3 - 0.5mm 0157Q 2571Q 2572Q 1. With the presser closing lever (1) pushed all the way by hand in the direction of the arrow in the illustration, loosen the nut (2) and move the presser closing roller (3) so that the gap is 0.3 - 0.5 mm when the work clamp is closed while the sewing machine is in operation.
5. ADJUSTMENT ５-１４. Adjusting the position of the button holder (BE-438B, 438C) 1. Loosen the two hexagonal bolts (1) and adjust the button holder body (2) by moving it. 2. Check that the needle will go through the button hole with no contact. (Refer to “CHECKING THE SEWING PATTERN” in the Instruction Manual.) 2668Q ５-１５. Work clamp adjustment (KE-435B, 435C, 436B, 436C) 1. Turn the pulley by hand to set the work clamp (1) to its lowest point. 2.
5. ADJUSTMENT ５-１６. Changing the work clamp lift (KE-435B, 435C, 436B, 436C) Standard lift amount of the work clamp (1) is 3 mm (max. 8 mm). 3 - 5mm Increase Decrease 0.5 - 1mm 2626Q 2483Q 2627Q Adjusting work clamp lift to 3 - 5 mm 1. Loosen the screw (2) and open the stepping cover (3). 2. Loosen the nut (4) and adjust the stepping work clamp connecting rod (5) position.
5. ADJUSTMENT ５-１７. Adjusting the thread wiper [Solenoid type] 3457Q 3459Q 3458Q Needle point Approx. 20mm 2579Q 3460Q 1. Remove the top cover (1) and the work clamp arm assembly (2). Remove the top cover (1) and the button clamp assembly (2). [BE-438B, 438C] 2.
5. ADJUSTMENT [Pneumatic type] 3653Q 3462Q Needle point Approx. 30mm 3461Q 2579Q 1. While the sewing machine is stopped, loosen the set screw (3) and move the thread wiper arm assembly (4) up or down to adjust so that the clearance between the tip of the needle and the top of the wiper is 2 ± 0.5 mm when the thread wiper connecting rod assembly (1) is pushed up and the thread wiper (2) has passed below the needle. * This adjustment should be made while the sewing machine is stopped.
5. ADJUSTMENT [KE-484C] 3465Q 3466Q Needle point Approx. 38mm 3464Q 3216Q 1. While the sewing machine is stopped, loosen the set screw (3) and move the thread wiper arm assembly (4) up or down to adjust so that the clearance between the tip of the needle and the top of the wiper is 2 ± 0.5 mm when the thread wiper connecting rod lever (1) is pushed up and the thread wiper (2) has passed below the needle. * This adjustment should be made while the sewing machine is stopped.
5. ADJUSTMENT ５-１８. Adjusting the thread take-up amount [KE-430B, 430C, 431B, 431C, 432B, 432C, 433B, 434B, 434C, BE-438B, 438C] At the time of shipment from the factory, the thread take-up amount (stroke) of the thread take-up lever (1) is adjusted as shown in the table below. You may need to adjust this setting depending on the sewing conditions to prevent the thread from pulling out at the sewing start.
5. ADJUSTMENT [KE-435B, 435C, 436B, 436C] At the time of shipment from the factory, the thread take-up amount (stroke) of the thread take-up lever (1) is set to the standard setting of 5 mm. You may need to adjust this setting depending on the sewing conditions to prevent the thread from pulling out at the sewing start. Thread take-up amount (stroke) Become greater Become less 3467Q 2722Q Loosen the screw (2) and move the stopper (3.
5. ADJUSTMENT ５-１９. Adjusting the movable knife [KE-430C series] Mark 2561Q 2465Q 1. Remove the top cover (1) while making this adjustment. 2. Turn the pulley by hand to set the needle bar to its lowest point. 3. Press down on the plunger (2) of the thread trimming solenoid as far as it will go, and fit the roller (3) into the groove of the thread trimmer cam (4). 4. In this condition, turn the machine pulley to align the position of the roller (3) with the mark on the thread trimmer cam (4).
5. ADJUSTMENT [KE-484C] 3206Q 3207Q Loosen the nut (2) and move the connecting rod lever (3) to the left or right to adjust so that the V section A is aligned with the index mark B on the needle plate when the sewing machine in the stopped position and the movable knife (1) is pushed to the machine pulley side so that there is no play.
5. ADJUSTMENT ５-１９-１. Replacing the movable knife and fixed knife (KE-430B, 430C, 431B, 431C, 432B, 432C, 433B, BE-438B, 438C) 2564Q 2466Q 1. Open the large shuttle hook cover, remove the screws (1) and (2), and then remove the feed plate (3). 2. Remove the two screws (4) and the two screws (5), and then remove the needle plate (6). 3. Remove the thread trimmer connecting rod (7) from the connecting rod lever pin (8). 3469Q 2945Q 4. Remove the movable knife (9) and replace it with a new one.
5. ADJUSTMENT ５-１９-２. Replacing the movable knife and fixed knife (KE-434B, 434C, 435B, 435C, 436B, 436C) 2615Q 2485Q 1. Open the large shuttle hook cover, remove the bolts (1) and the feed plate (2). 2. Remove the two screws (3) and the two screws (4), and then remove the needle plate (5). 3. Remove the thread trimmer connecting rod (6) from the connecting rod lever pin (7). 3470Q 2947Q 4. Remove the movable knife (8) and replace it with a new one.
5. ADJUSTMENT ５-１９-３. Replacing the movable knife and fixed knife (KE-484C) 2615Q 3208Q 1. Open the large shuttle hook cover, remove the bolts (1) and the feed plate (2). 2. Remove the two screws (3) and the two screws (4), and then remove the needle plate (5). 3. Remove the two screws (6) and the feed bar guide plate FF (7). 4. Remove the thread trimmer connecting rod (8) from the connecting rod lever pin (9). 3209Q 3210Q 5. Remove the movable knife (10) and replace it with a new one.
5. ADJUSTMENT ５-１９-４. Adjusting the engagement of the movable knife and fixed knife 0149Q 3471Q Fig. 1 Shoulder screw Movable knife Fixed knife Cutting edge Cutting edge Cutting edge Cutting edge 0150Q 0149Q ＜KE-484C＞ Shoulder screw Cutting edge Cutting edge Fig. 1 Movable knife Fixed knife Cutting edge Cutting edge 3213Q 3472Q A. After the movable knife and fixed knife are properly engaged, tighten the screw as shown in Fig. 1. B.
5. ADJUSTMENT ５-２０. Adjusting the position of the thread trimming link mechanism 3473Q 3474Q 3475Q 1. Remove the top cover (1). 2. Loosen the two bolts (4) and adjust the position of the driving lever stopper (3) so that distance A between the thread driving lever (2) and the driving lever stopper (3) shown in the illustration is 6 mm. 3.
5. ADJUSTMENT ５-２１. Adjusting the backlash 3476Q 3477Q 1. Loosen the set screw (1), and move the rock gear (2) to the left and right so that the pulley can rotate easily. 2. Turn the rock gear shaft (3) to adjust the play at the end of the driver (4) to 0.05 – 0.12 mm, and tighten the set screw (1). Tip of the rotary hook 3479Q 3478Q 1. Loosen the set screw (1), and move the lower shaft timing pulley (2) to the left and right so that the pulley can rotate easily. 2.
5. ADJUSTMENT ５-２２. Adjusting the presser solenoid position (Solenoid specifications) 3457Q Seen from above 3480Q 3481Q 1. Remove the top cover (1) and the work clamp arm assembly (2). Remove the top cover (1) and the button clamp assembly (2). [BE-438B, 438C] 2. Remove the two rubber caps (3), and loosen the two screws (4) of the solenoid setting plate B. 3. Loosen the four screws (5), set the presser solenoid (6) so that it is 110 ± 0.
5. ADJUSTMENT ５-２３. Adjusting the sensor perceive plate position (Solenoid specifications) 3457Q 1. Remove the top cover (1) and the work clamp arm assembly (2). Remove the top cover (1) and the button clamp assembly (2). [BE-438B, 438C] 3482Q 3484Q 3483Q 2. Remove the rubber cap (3) from the side of the arm. Approx. 5mm 3. Turn on the power switch. 4.
5. ADJUSTMENT ５-２４. Adjusting the home position KE-430B, KE-430C, KE-431B, KE-431C, KE-432B, KE-432C, KE-433B, BE-438B, BE-438C… Refer to [A]. KE-434B, KE-434C, KE-435B, KE-435C, KE-484C… Refer to [B]. KE-436B, KE-436C… Refer to [C]. [A] [B], [C] 3485Q 3486Q 1. Install the home position standard plate (1) to the feed bracket (2) with the two screws (3). 3487Q [A], [B] 2. Turn on the power switch. 3. Press the SELECT switch (4) until the PROGRAM NO. indicator illuminates. 4.
5. ADJUSTMENT [A] [B], [C] 3490Q 3491Q 5. Turn the pulley by hand and check at what point the needle drops to the home position standard plate. If the needle does not drop to point (a), carry out the following adjustments. Note: Be careful not to let the needle touch the home position standard plate. 3492Q [A] X direction Y direction [B], [C] X direction Y direction (Seen from the side) 3493Q 6. Turn off the power switch. 7.
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5. ADJUSTMENT ５-２５. Adjusting the needle up stop position Feed mechanism operates. Material Feed mechanism stops 2576Q 3502Q Loosen the screw (5) (at the U side on the pulley), and turn the pulley (1) so that the mark (2) on the pulley is inside the mark (4) of the belt cover (3). The pulley (1) will stop more slowly if the screw (5) is moved counter to the normal direction of rotation, and will stop more quickly if the screw (5) is moved in the normal direction of rotation.
5. ADJUSTMENT ５-２７. Checking the head position switch Check that the head position switch is turned on as shown in the illustration. Note: If the head position switch is not turned on, error E-17 (error E.16 for the KE-436B/436C) will be displayed.
5. ADJUSTMENT ５-２８. Work clamp interchangeability (KE-433B) The KE-430B, 430C work clamp can also be used with the KE-433B. Remove the screw (1), washer (2) and cover support stand (3), and then change the installation position for the work clamp arm assembly (4) from the standard installation position A to installation position B. 3503Q ５-２９. Work clamp interchangeability (KE-434B, 434C, 435B, 435C, 436B, 436C, 484C) 2619Q The work clamp for the BAS-311F can be used.
5. ADJUSTMENT ５-３０. Adjustment of air pressure (Pneumatic specifications) 2621Q Increase pressure Increase pressure 1. Air pressure should be 0.5 Mpa. The air pressure can be adjusted by pulling up and turning the control knob (2) on the integrator (1). After adjustment is complete, push the control knob (2) downward to lock it. 2.
6. TROUBLESHOOTING ６. TROUBLESHOOTING CAUTION Turn off the power switch and disconnect the power cord before carrying out troubleshooting, otherwise the machine will operate if the foot switch is depressed by mistake, which could result in injury. Problem Cause Remedy Ref. Grease the sliding part of the work clamp. P.104 P.105 Adjust the work clamp (button clamp) lift amount. P.104 P.105 P.
6. TROUBLESHOOTING Problem Upper thread breaks. Cause Remedy Ref. Upper thread tension is too strong. Adjust the upper thread tension. P.5 Needle is installed incorrectly. Install the needle correctly. Thread is too thick for the needle. Use the correct thread for the needle. P.5 Thread take-up spring tension and Adjust the tension and height of the height are incorrect. thread take-up spring. P.
6. TROUBLESHOOTING Problem Cause Upper thread is not Movable knife is blunt. trimmed. Fixed knife is blunt. Remedy Replace the movable knife. Sharpen or replace the fixed knife. Adjust the position of the shuttle Movable knife does not pick up the race thread guide. (except KE-484C) thread. Adjust the needle bar lift amount. The movable knife does not pick up the thread because of skipped Refer to “Skipped stitches occur”. stitches at the sewing end. Thread jamming. P.102 P.100 P.
7. OPTIONAL PARTS ７. OPTIONAL PARTS Two-pedal foot switch Two-step foot switch 0271Q 0272Q The presser switch and the start switch have been This is a pedal-type foot switch. separated, giving the operator more flexibility to select the best method of working. * Standard equipment for pneumatic specification Solenoid thread wiper Work clamp set QC (KE-430*) 0275Q 0274Q This wipes the thread independently of the work The work clamp can be easily replaced by loosening clamp operation.
7. OPTIONAL PARTS Thread breakage detector (KE-436*) 2-step thread tension device (KE-436*) 3579Q 3578Q The emergency stop is activated to warn the operator This allows the upper thread tension to be switched when a thread breakage is detected. Both rotary-type between two settings at any position desired by using and beam-type detectors are available. the programmer.
8. ELECTRIC MECHANISM ８. ELECTRIC MECHANISM ８-１. Precautions at the time of adjustment Pay attention to the following when opening the control box for maintenance. Electric shock Some large capacitors may have a high voltage remaining in them for up to 5 minutes after the power is turned off.
8. ELECTRIC MECHANISM Panel PCB The panel PCB is fixed to the front panel of the operation panel. This PCB controls indications of the machine status and the input operation. Operation panel Panel PCB Panel PCB [KE-436B, 436C] 3584Q 3585Q ８-３. Fuse explanation When replacing a fuse, follow the instructions indicated in “ 8-14. Troubleshooting flowchart”. If a component on a PCB is damaged, a fuse may blow again immediately even when it has been replaced.
8. ELECTRIC MECHANISM ８-４. Connectors Most of the machine trouble is due to connector problems including improper connection or sufficient 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. ８-４-１.
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8. ELECTRIC MECHANISM ８-４-２. Contact failure The connectors functions are divided into five categories. Some connectors may belong to more than one group. Be sure to investigate another category if a problem is not found in one category. For the details of connections, refer to the control circuit block diagram at the end of this manual. 1. Feed mechanism Problem Connector No. and position 3654Q • The feed mechanism operates but the home position is not detected correctly. • Error E-A0 is displayed. ([E.
8. ELECTRIC MECHANISM 3. Sewing operation Problem Connector No. and position • The power indicator is not illuminated, and nothing operates. • Machine operation is unstable. 3660Q • The power indicator is not illuminated, and nothing operates. • Machine operation is unstable. • The feed mechanism does not operate. • The work clamp lifter mechanism does not operate. • Error E-61 is displayed. • Error E-A0 is displayed. ([E.A1] KE-436B, 436C) 3661Q • The machine motor does not run.
8. ELECTRIC MECHANISM 4. Programmer operation (KE-436B, 436C) Problem Connector No. and position • The programmer does not operate. • No switches on operation panel operate. 3666Q • Keys on the programmer respond, but nothing appears on the display. (P1-LCD) • Display of the programmer is not lit (Inverter for P3-LCD) 3667Q 5. Others Problem Connector No. and position • The DC fan motor does not run. • Error E-70 is displayed. ([E.c1] KE-436B, 436C) 3668Q • Error E-F1 is displayed. ([E.
8. ELECTRIC MECHANISM Connector No. and position Problem • Indication is strange. • Any switch does not have any effect. • The power indicator is not illuminated. • Error E.E1, E.E2 or E.E3 is displayed. 3672Q • The work clamp does not operate. • The stepping foot does not operate.
8. ELECTRIC MECHANISM ８-５. Explanation of the DIP switches ８-５-１. Operation panel DIP switches (KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438*) Note: Always turn off the power before setting the DIP switches. All DIP switches are set to OFF at the time of shipment. 3615Q DIP switch A Switch DIPA-2 Presser does not automatically lift after sewing is completed. Pedal mode is switched. DIPA-3 User program mode is available.
8. ELECTRIC MECHANISM ８-５-２. Operation panel DIP switches (KE-436B, 436C) Note: Always turn off the power before setting the DIP switches. 1086Q All DIP switches are set to OFF at the time of shipment. DIP switch A Switch Motion when set to ON DIPA-1 Work clamp does not automatically lift after sewing is completed. DIPA-2 Pedal mode is switched. DIPA-3 - DIPA-4 - DIPA-5 After sewing is completed, work clamp does not automatically rise.
8. ELECTRIC MECHANISM ８-５-３. DIP switches inside the control box DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. All DIP switches are set to OFF at the time of shipment. Note: When opening the cover, hold it securely so that it does not fall down.
8. ELECTRIC MECHANISM ８-６. Explanation of the memory switches (KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438*) Special function settings can be carried out using the operation panel. Note: After changing the memory switch settings, press the power switch to turn the power off and then back on again. The memory switches “00 - 2F” are set to OFF at the time of shipment. 3617Q 1. Turn on the power switch. 2. While pressing the TEST switch (1), press the BOBBIN. WIND switch (2).
8. ELECTRIC MECHANISM Switch Motion when set to ON Initial value Solenoid Pneumatic memo-06 At the end of sewing, the feed plate will be returned to the sewing start point via mechanical home position. Work clamp (button clamp) will move to the sewing start point, and then will be lifted. (For models with solenoid specifications other than the KE-434*, the work clamp rises at the final stitch to enable quick taking out of the workpieces.
8. ELECTRIC MECHANISM Switch Motion when set to ON Initial value Solenoid Pneumatic memo-16 When using the inner clamping device, shunting to prevent interference between the inner clamping device and the needle is not carried out after the sewing end. Needle cooler can be used (available by special order). memo-17 Thread take-up device is not operated at the sewing end. memo-18 Thread take-up device operates one stitch before the sewing end.
8. ELECTRIC MECHANISM 30 to 4F are set by entering two-digit values. These values are incremented using the P2 switch, and decremented using the P4 switch. Switch Possible setting range Units Initial value 0 - 30 memo-30 mm *** mm *** 0 - 99 0 - 30 memo-31 0 - 60 12 - 27 memo-32 12 - 25 27 100rpm 25 12 - 22 22 1 - 10 5 7.5 memo-33 1 - 15 10 0 memo-34 0-5 Stitch 1 memo-35 3-9 100rpm 4 memo-36 - - - memo-37 1 - 20 7.5 10 memo-38 1 - 20 7.
8. ELECTRIC MECHANISM Switch Possible setting range Units Initial value Explanation memo-3c 0 - 99 Stitch 0 memo-3d - - - Changes the feed timing for the second stitch at the sewing start. Changes the feed timing for the second stitch at the sewing start. Changes the feed timing for the first stitch at the sewing start.
8. ELECTRIC MECHANISM ８-７. Explanation of the memory switches (KE-436B, 436C) Special function settings can be carried out using the operation panel. Note: After changing the memory switch settings, press the power switch to turn the power off and then back on again. 3618Q 1. Turn on the power switch. 2. While pressing the TEST switch (1), press the STEP BACK switch (2) to switch to setting mode. 3.
8. ELECTRIC MECHANISM Memory switches (00–0F) Switch No. memo-00 memo-01 memo-02 Motion when set to ON When moving to the home position, the feed plate moves in the order r and the start position moves in the order r . (*1) (The feed plate does not move via the position that has been set by memo-3C.) When moving to the home position, the feed plate moves in the order r and the start position moves in the order r.
8. ELECTRIC MECHANISM Memory switches (20 - 2F) Switch No. Motion when set to ON Initial value memo-22 During feed test operation, jump feeding 100 stitches at a time is possible using the STEP BACK switch. After the home position is detected and the machine moves to the sewing start position, the work clamp rises automatically. memo-23 memo-24 memo-28 The enlargement and reduction ratio settings at the operation panel are fixed at the values when memo-25 was set to ON.
8. ELECTRIC MECHANISM Switch No. Possible setting range Units Initial value memo-39 0 - 11 0 memo-3A 1-3 2 memo-3b 0 - 13 Explanation Changes the reference point for enlargement and reduction using the operation panel.
8. ELECTRIC MECHANISM ８-８. Setting the work clamp mode Through the combination of DIP switches A-1 and A-2 on the operation panel, presser motions can be set as follows: [Setting solenoid work clamp mode] Pedal specifications DIPA-1 DIPA-2 - - Single pedal ON - Single pedal - ON Two pedals ON ON Two pedals Raising the presser at the sewing end Work clamp is raised automatically. (factory default settings) Work clamp is raised by pressing the pedal.
8. ELECTRIC MECHANISM ８-８-１. Light work clamp For pneumatic specifications, the hose connections can be changed so that the work clamp are made to lower gently when the work clamp pedal is depressed to the 1st step, and firmly when the work clamp pedal is depressed to the 2nd step. This makes it easier to carry out position matching when attaching small articles such as labels.
8. ELECTRIC MECHANISM ８-９. Checking the input sensor and DIP switch input [KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438*] 2581Q 1. When the X-SCALE indicator (1) is illuminated and the RESET switch (3) is pressed while the TEST switch (2) is being pressed, the state of the X home position signal will appear on the display window (4). When sensor is ON When sensor is OFF * For the KE-430*, 431*, 432*, 433B and BE-438*, “ON” is displayed when the Y home position sensor is off. 2.
8. ELECTRIC MECHANISM [KE-436B, 436C] 2729Q 1. When the SPLIT NO. indicator (1) is illuminated and the R/W switch (3) is pressed while the TEST switch (2) is being pressed, the X-SCALE indicator (4) will illuminate and the state of the X home position signal will appear on the display screen (5). When sensor is ON When sensor is OFF 2.
8. ELECTRIC MECHANISM ８-１０. Checking the input voltage 3619Q [KE-436B, 436C] 3620Q 1. Turn on the power switch. 2. Press the SELECT switch (1) until the Y-SCALE indicator (2) illuminates. [KE-436B, 436C] Press the menu switch (1) until the X-SCALE indicator (2) illuminates. 3. While pressing the TEST switch (3), press the RESET switch (4). [KE-436B, 436C] While pressing the TEST switch (3), press the R/W switch (4). 4.
8. ELECTRIC MECHANISM ８-１１. 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 instance. In such cases, carry out the following procedure to clear the memory, and also check the DIP switch settings. 3621Q [KE-436B, 436C] 3622Q [KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438B] While pressing the RESET switch (1), turn on the power.
8. ELECTRIC MECHANISM ８-１２. Confirming software version [KE-430*, 431*, 432*, 433B, 434*, 435*, 484C, BE-438B] 3623Q 1. While pressing the TEST switch (1), turn on the power to the machine. Version number of each PROM can be confirmed in display (2). 3rd and 4th digits: Special specification 2nd digit: Version number Versions A, B and C are replaced with 1, 2 and 3 respectively. 1st digit: PROM identification code 2.
8. ELECTRIC MECHANISM [KE-436B, 436C] 3624Q 1. While pressing the TEST switch (1), turn on the power to the machine. Version number of each PROM can be confirmed. Program No. display Menu display 4th and 5th digits: Special specification 3rd digit: Version number Versions A, B and C are replaced with 1, 2 and 3 respectively. 2nd digit: “0” 1st digit: PROM identification code 2.
8. ELECTRIC MECHANISM ８-１３. Table of error codes DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. If a malfunction should occur with the sewing machine, a buzzer will sound and an error code will appear in the display window. Follow the remedy procedure to eliminate the cause of the problem.
8. ELECTRIC MECHANISM Code Cause E-31 Stitch pattern data overlaps the sewing area when area limiting is active. E-32 The data format of the user program (% or mm) does not match the setting of DIP switch A-6. E-40 Length of a stitch exceeds 10 mm. E-41 Abnormality in the sewing data. E-42 Invalid program number specified. E-50 Needle bar does not stop when the needle is raised. E-60 Presser has not been lowered. E-61 Presser cannot be raised. E-62 Presser is not raised.
8. ELECTRIC MECHANISM Code E-E1 E-E2 E-F0 E-F1 E-F2 Cause Remedy Press the RESET switch to reset the error. However, Corrupted EEPROM data, or main PROM the data (memory switches, display and user version has been upgraded. programs) will be reset to the backup data or initialized. Press the RESET switch to reset the error. However, Corrupted EEPROM control information data. the data (memory switches, display and user programs) will all be initialized.
8. ELECTRIC MECHANISM Code E.40 E.41 E.43 E.4F E.50 E.51 E.52 E.5F E.60 E.61 E.62 E.63 E.80 E.81 E.90 E.91 E.A0 E.A1 E.c0 E.c1 E.c2 E.d0 E.E0 E.E1 E.E2 E.E3 E.F0 E.F1 E.F2 Cause Remedy Insert a floppy disk. If floppy disk is already inserted, Floppy disk is not inserted or operation panel turn off the power and check the connections of cable is not securely connected. cords inside the operation panel. Invalid program No., or no data. Change program No. Different floppy disk! Use original floppy disk.
8. ELECTRIC MECHANISM ８-１４. Troubleshooting ８-１４-１. Troubleshooting flowchart Be sure to set DIP switch A-1 on the operation panel to off before starting the troubleshooting flowchart. Symbols and their meanings Manual operation Set-up operation or condition Switch operation The procedure to follow continues on the next page Yes-or-no decision-making process OFF Turning-off of power switch the The error status number in the first column of the table of “8-14-2.
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8. ELECTRIC MECHANISM ８-１４-２. Problem solution and measures 1. Pay attention to the following when opening the control box for maintenance. Electrical shock Some large capacitors may have a high voltage remaining in them for up to 5 minutes after the power is turned off.
8. ELECTRIC MECHANISM Error status #1 The power indicator does not light when the power is turned on. Probable causes Check/ repair/ adjust 1. Conversion transformer Note: Before adjustment, be sure to check improperly wired that the power is turned off to prevent (for 100V and 110V electric shock. specifications) If the power is turned on, turn off the power, and wait at least 5 minutes.
8. ELECTRIC MECHANISM Error status #1 The power indicator does not light when the power is turned on. Probable causes Check/ repair/ adjust 5. Power supply circuit board • Separate P4 (ACIN) connectors on the defective power supply circuit board, and then measure the resistance between the following pairs of pins, pins 1 and 4 and pins 2 and 4, in the connector on the cable. If the resistance is in both cases, the power supply circuit board is not defective.
8. ELECTRIC MECHANISM Error status #2 Error code appears on the display window when the power is turned on. Probable causes Check/ repair/ adjust Parts to be replaced 2. PROM chip defective or main a. Check the PROM chip is securely PROM chip circuit board defective when attached to the main circuit board without Main circuit board the error code E-80 appears its lead bent. on the display window. b. Check the PROM chip is attached to the ([E.
8. ELECTRIC MECHANISM Error status #2 Error code appears on the display window when the power is turned on. Probable causes Check/ repair/ adjust Parts to be replaced 10. Short circuit in a solenoid or a. See #9-3. Presser solenoid and feed motor (malfunction of b. See #18-2. main circuit board main circuit board) occurs or c.
8. ELECTRIC MECHANISM Error status #6 Home position is not correct. Probable causes Check/ repair/ adjust • Check the status of home position signals. 1. Home position sensor not (Detect the home position and check the adjusted properly monitor lamps (red) of the X and Y home position sensors.) X is illuminated and Y is off. Both X and Y are off. In the above cases, adjust the position of the home position dog. (See “5-24.
8. ELECTRIC MECHANISM Error status #8 Error code appears on the display window when the foot switch is depressed. Probable causes Check/ repair/ adjust Parts to be replaced 2. Power supply circuit board is a. Measure the resistance between the fuse Power supply circuit defective when the feed No.1 terminal which is close to the center board mechanism does not move of the power supply circuit board and pin and error code E-A0 appears 2 of P5 (DC300) connector. on the display window.
8. ELECTRIC MECHANISM Error status #8 Error code appears on the display window when the foot switch is depressed. Probable causes Check/ repair/ adjust Parts to be replaced 5. Head position sensor is a. Separate P1A (ORG1) connector on the Head position sensor defective when the feed main circuit board. Measure the mechanism does not move resistance between pins 7 and 8 in the and error code E-17 appears connector on the cord. on the display window.
8. ELECTRIC MECHANISM Error status #9 Work clamp does not rise. Probable causes Check/ repair/ adjust 3. Work clamp is not raised a. If it does not rise because of mechanical although attempted, when no problem, see “5-22. Adjusting the posierror code appears or error tions of the presser solenoid.” code E-61 appears on the b. Separate P5 (SOL) connectors on the display window.
8. ELECTRIC MECHANISM Error status #11 The TEST indicator does not light when the TEST switch is pressed. Probable causes Check/ repair/ adjust Parts to be replaced Panel PCB or panel 1. TEST switch and its cord are • Separate P8 (PANEL) connectors on the defective. main circuit board, and measure the cable assembly resistance between pins 2 and 20 in the (KE-430*, 431*, 432*, 433B, connector on the cord with the polarity 434*, 435*, 484C, BE-438*) shown in the left figure.
8. ELECTRIC MECHANISM Error status #14 The machine does not operate correctly for the set program during test sewing. Probable causes Check/ repair/ adjust Parts to be replaced 1. Foot switch and cord defec• See #7. tive Error status #15 The machine does not operate during sewing, and the error code E-20 appears on the display window. (“E.20” appears for the KE-436B and 436C.) Probable causes Check/ repair/ adjust Parts to be replaced a. Make sure P3 (DC18) connector on the 1.
8. ELECTRIC MECHANISM Error status #16 Error code appears on the display window after the machine operates. Probable causes Check/ repair/ adjust Parts to be replaced 2. A malfunction occurs due to a. Make sure that the ground wire is surely noise or main PROM is grounded and there is no equipment that defective when error code generates strong electrical noise in the E-21 appears after the vicinity. machine is started. b. If the machine has been remodeled, return the machine to its original condition ([E.
8. ELECTRIC MECHANISM Error status #18 The thread trimmer does not operate. Probable causes Check/ repair/ adjust 3. Main circuit board 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 there is a sudden voltage output at the end of sewing, it is OK. Thread trimmer Parts to be replaced Main circuit board 3648Q Error status #19 Thread take-up lever does not operate.
8. ELECTRIC MECHANISM Error status #20 The machine does not stop with the needle at the upper position. (“E-50” appears <“E.22” for the KE-436B and 436C>.) Probable causes Check/ repair/ adjust 3. Cord defective • See #15-1. 4. Power supply circuit board defective Main circuit board • With P13 (DC18) connectors plugged in on the main circuit board, measure the voltage in the connector on the cable.
8. ELECTRIC MECHANISM ８-１５.
SERVICE MANUAL Printed in Japan KE-430B, 430C series I3080844B 2003.09.
