Summary of MC15000
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Mc15000 (ver.2.0) service manual.
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Index changing external parts face cover .................................................................................................................................................................1 belt cover ........................................................................................
Page 3: Changing External Parts (1)
1 changing external parts (1) face cover to remove: 1. Open the face cover. Disconnect the connector. 2. Remove the setscrews a (2 pcs.). Remove the face plate. To attach: 1. Follow the above procedure in reverse. Belt cover to remove: 1. Remove the caps. 2. Remove the setscrews a and b. Connector f...
Page 4: Changing External Parts (2)
2 changing external parts (2) top cover to remove: 1. Open the top cover. Remove the setscrew a. 2. Remove the setscrew b. 3. Close the top cover. Raise the carrying handle. Remove the setscrew c. 4. Detach the top cover for the machine. Be careful that the connector for the bobbin winding motor is ...
Page 5: Changing External Parts (3 )
3 base plate to remove: 1. Remove the setscrews a (3 pcs.). 2. Remove the setscrews b (2 pcs.). 3. Remove the base plate. To attach: 1. Follow the above procedure in reverse. Changing external parts (3 ) a a a b b base cover to remove: 1. Remove the extension table. Remove the setscrews a (4 pcs.). ...
Page 6: Changing External Parts (4)
4 gap no gap 5. Slide the free arm cover in the direction of arrow so there should be no gap between the needle plate base plate and free arm cover. Remove the free arm cover. * there are 3 hooks (c, d and e) holding the free arm cover as indicated. Unlatch the hooks before removing the free arm cov...
Page 7: Changing External Parts (5)
5 front cover g changing external parts (5) h front cover to remove: 1. Remove the belt cover and top cover (see page 1 and 2). 2. Loosen the setscrew (a, b, c, d, e and f). 3. Press down the rear cover through the holes (g and h) with a screwdriver to unlatch the front cover. 4. Remove the front co...
Page 8: Changing External Parts (6)
6 changing external parts (6) connector a face cover b rear cover to remove: 1. Remove the belt cover, top cover and base cover (see page 1, 2 and 3). 2. Open the face plate and disconnect the connector. 3. Loosen the setscrews a and b. 4. Remove the setscrews c (2 pcs.) and d (2 pcs). C d e 5. Pres...
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7 machine motor phase sensor printed circuit board a connection printed circuit board u1 relay (24-pin) printed circuit board u2 relay (18-pin) printed circuit board u2 relay (20-pin) knee lifter sensor lcd printed circuit board u1 relay (26-pin) printed circuit board b (usb board) foot control spea...
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8 replacing electronic components communication module (1) symptom: the wireless lan on/off function is grayed out and the network name and ip address are blank. When the machine is turned on, mc15000 performs wireless lan initialization according to either of the following procedures: a) an initial...
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9 replacing electronic components communication module (2) to remove: 1. Remove the the printed circuit board a from the machine (see page 7). Tune the printed circuit board a rear-side up. Hold the communication module lightly, and remove the nuts (2 pcs.). Nut 2. Remove the module from the printed...
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10 a printed circuit board u1 circuit board u1 connection buttonhole sensor presser foot lifter switch n/a thread tension motor zigzag motor relay cable (2-pin) printed circuit board a relay (24-pin) replacing electronic components printed circuit board u1 note: do not disconnect the connectors by p...
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11 bobbin thread sensor potentiometer needle plate sensor switch printed circuit board a relay (18-pin) feed motor printed circuit board a relay (14-pin) bobbin thread sensor motor drop feed motor printed circuit board a relay carriage relay (carriage) thread cutter motor replacing electronic compon...
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12 printed circuit board k to remove: 1. Remove the front cover (see page 5). 2. Disconnect the connectors from the circuit board k. 3. Remove the setscrews (3 pcs), and the circuit board k. To attach: 1. Follow the above procedure in reverse. Replacing electronic components circuit board k connecti...
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13 setscrews a printed circuit board f printed circuit board f to remove: 1. Remove the front cover (see page 5). 2. Disconnect the connector a from the circuit board k. 3. Remove the setscrews (2 pcs), and the circuit board f. To attach: 1. Follow the above procedure in reverse. Replacing electroni...
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14 switching power supply unit • before removing 1. Remove the belt cover, top cover, front cover and the rear cover (see pages 1, 2 and 5). • removing the auxiliary power supply unit case 2. Disconnect the connector of the auxilliary power supply unit from the printed circuti board a (see page 7). ...
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15 ferrite core usb unit • before removing 1. Remove the belt cover, top cover and the front cover (see pages 1, 2 and 5). • removing the usb unit 2. Disconnect the connector of the usb board from the printed circuti board a (see page 7). Cut the tie band of the ferrite core and remove the cords fro...
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16 200 g pressure 5 mm setscrew replacing electronic components driving motor to remove: 1. Remove the belt cover, the top cover, the front cover and auxiliary power supply unit case (see page 1, 2, 5 and 13). 2. Disconnect the connector of the foot control from the printed circuti board a (see page...
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17 replacing electronic components thread tension unit setscrew a thread tension unit to remove: 1. Remove the belt cover and the top cover (see page 1 and 2). 2. Remove the front cover (see page 5). 3. Disconnect the thread cut detection connector and the thread tension motor connecter from the pri...
Page 20: Mechanical Adjustment
18 hexagonal socket screw (4 x 6) setscrew (b) threaded hole zigzag foot a 0.8 – 0.9 mm the surface of needle plate feed dog teeth adjusting screw setscrew (a) nut presser foot lifter button start/stop button reverse stitch button ⇒ mechanical adjustment feed dog height the highest position of the f...
Page 21: Mechanical Adjustment
19 1. Attach the needle #14. 2. Turn the power switch on. Select straight stitch ( ). Check that the needle drop position is centered when the drop position is set at "4.5", and the clearance between the side of the needle and the needle hole is 0.2 mm or more when the needle position is set at "0.0...
Page 22: Mechanical Adjustment
20 lower gear 3.70 to 4.00 mm lowest needle position needle #14 bobbin holder setscrews hook tip of hook hook mechanical adjustment hook timing the amount of ascending travel of the needle bar from its lowest position to the position (needle drop position 0.0) where the tip of the rotary hook exactl...
Page 23: Mechanical Adjustment
21 1. Attach the needle #14. 2. Turn the power switch on. Select straight stitch ( ). Set the needle drop position at "0.0". * do not turn the switch off. 3. Remove the presser foot, the needle plate and the bobbin holder. (see page 4) * cover the needle plate with the fabric to prevent damaging the...
Page 24: Mechanical Adjustment
22 master needle tip of hook -0.1 to +0.05 mm left needle position right needle position mechanical adjustment clearance between needle and tip of the rotary hook the clearance between the needle and the point of hook should be -0.1 to +0.05 mm. 1. Remove the top cover (see page 2). 2. Remove the pr...
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23 setscrew c setscrew b setscrew a hook base plate clearance adjustment 2 1. Remove the bed cover (see page 3). 2. Loosen the setscrews a, b and c. Tighten the setscrew c lightly. 3. Turn the handwheel toward you. Adjust the clearance between the needle and the tip of the rotary hook, by moving the...
Page 26: Mechanical Adjustment
24 a b lower shaft bushing hexagonal socket screw (c) lower shaft gear hook driving gear lower shaft gear lower bushing of the front side lower bushing of the belt cover lower shaft bushing hexago- nal socket screw (d) mechanical adjustment backlash between hook drive gear and lower shaft gear the r...
Page 27: Mechanical Adjustment
25 even sensor upper shaft shield plate needle #14 needle threader shield plate setscrew feed sensor bight sensor (zigzag sensor) bight shield plate (zigzag shield plate) feed shield plate surface of needle plate mechanical adjustment upper shaft shield plate position when the machine is set for zig...
Page 28: Mechanical Adjustment
26 pulling direction: (pulling speed 110 mm/sec.) mechanical adjustment upper thread tension the standard upper thread tension should be 59 to 67 grams when the machine is set for pattern no.1 and the thread tension is set at "3.4", measured with a #50 polyester thread being pulled at approximately ...
Page 29: Mechanical Adjustment
27 setscrew thread tension gear tension discs supporter thread tension release adjusting plate tension discs (closed) convex part of tension gear tension release claw tension release claw setscrew thread tension 1.2 – 1.8 mm view a 1.2 – 1.8 mm thread tension release adjusting plate tension discs su...
Page 30: Mechanical Adjustment
28 mechanical adjustment needle threader holder (threader hook) replacement if the hook of the needle threader holder is damaged, change or adjust the part as follows: to remove: 1. Loosen the setscrew a to remove the needle threader holder. A q q w e r t 2. Prepare the replacement parts (order them...
Page 31: Mechanical Adjustment
29 check: 1. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "needle thread" key. 2. Press the needle up/down button twice to raise the needle to its highest position. 3. Press "down" key. The needle threader will a...
Page 32: Mechanical Adjustment
30 mechanical adjustment needle thread motor replacement if the needle thread motor is damaged, change the part as follows: motor cover a b 1. Remove the top cover (see page 2). Disconnect the connector form the face cover. 2. Loosen the setsrew a. 3. Remove the setscrew b to remove the motor cover....
Page 33: Mechanical Adjustment
31 thread drawing lever 5.5 – 6.0 mm hexagonal bolt hook race view a thread drawing lever view a hook race mechanical adjustment thread drawing lever the standard height of the thread drawing lever from the surface of bobbin holder should be in the range of 5.5 – 6.0 mm. 1. Remove the presser foot, ...
Page 34: Mechanical Adjustment
32 to check: 1 remove the belt cover and base cover (see page 1 and 2). 2. Turn the power switch on and select ( ) stitch. Press the drop feed key to drop the feed dog. 3. Turn the upper feed adjusting dial to set the dial at "0". 4. Press the needle up/down button twice to raise the needle. Turn th...
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33 view from the base cover side upper feed link shaft to adjust: 1 loosen the setscrew on the upper feed adjusting arm (1). Adjust the clearance between the upper feed link shaft and upper feed lower shaft to 2.5 mm. Upper feed lower shaft rear arm upper feed lower shaft upper feed adjusting arm (1...
Page 36: Mechanical Adjustment
34 to check: 1 attach the dual feed foot (see page 35). 2. Turn the power switch on and select ( ) stitch. (be sure that the machine is not locked.) press the drop feed key to drop the feed dog. 3. Turn the upper feed adjusting dial to set the dial at "0". 4. Press the needle up/down button twice to...
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35 attaching the dual feed holder: * attach the presser foot to the dual feed holder before attaching it. 1. Turn the power switch on. Press the lockout key to lockout the machine before replacing the foot holder. Presser foot lifter needle foot holder thumbscrew presser foot bar dual feed foot ad (...
Page 38: Mechanical Adjustment
36 to check: 1. Attach the dual feed foot (see page 35). 2. Attach the needle #14. 3. Turn the power switch on and select ( ) stitch. (be sure that the machine is not locked.) press the drop feed key to drop the feed dog. 4. Turn the upper feed adjusting dial to set the dial at "0". 5. Press the nee...
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37 front bracket to adjust: 1. Turn the power switch on and select ( ) stitch. (be sure that the machine is not locked.) press the drop feed key to drop the feed dog. Turn the upper feed adjusting dial to set the dial at "0". Press the presser foot lifter button to lower the presser foot. Turn the p...
Page 40: Mechanical Adjustment
38 ⇔ hexagonal socket screw mechanical adjustment buttonhole lever adjustment buttonhole lever buttonhole lever guide buttonhole lever buttonhole lever guide setscrew hexagonal socket screw setscrew clearance presser foot slider stopper buttonhole foot (r) 1 turn the power switch on while pressing t...
Page 41: Mechanical Adjustment
39 end of thread cutter plate slit 0.4 to 1.2 mm edge of moving cutter sensor plate setscrew a b thread cutter switch thread cutter base plate moving cutter mechanical adjustment thread cutter the distance between the end of thread cutter plate slit and the edge of moving cutter should be in the ran...
Page 42: Mechanical Adjustment
40 should be parallel mechanical adjustment presser bar lifter position the clearance between the presser foot and the surface of the needle plate should be 6 mm when the presser foot is raised. The presser foot (zigzag foot a) should be parallel to the slot of the feed dog teeth when attached. Zigz...
Page 43: Mechanical Adjustment
41 mechanical adjustment presser foot lifter stopper position (1) the distance between the presser foot spring release base and the presser foot lifter should be in the range of 39.4 mm to 39.8 mm when the presser foot is raised with the presser foot lifter. Preparation: 1. Turn the power switch on....
Page 44: Mechanical Adjustment
42 mechanical adjustment presser foot lifter stopper position (2) d 6. Remove the setscrews d. Remove the thread motor unit from the carrying handle supporter. Be careful that the thread motor unit is still connected with the cables. (you may put the piece of soft fabric at the top of the machine an...
Page 45: Mechanical Adjustment
43 39.6 mm presser foot lifter stopper mechanical adjustment presser foot lifter stopper position (3) to adjust: 1. Turn the handwheel toward you to lower the needle. Raise the presser foot lifter. Loosen the hexagonal socket screw of the presser foot lifter stopper from the front side of the machin...
Page 46: Mechanical Adjustment
44 mechanical adjustment automatic presser foot lifter initializing sensor position to adjust: 1. Remove the top cover. 2. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "foot sensor" key. Start/stop button reverse...
Page 47: Mechanical Adjustment
45 mechanical adjustment presser bar height to adjust: 1. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "foot up/down" key. 2. Attach the foot holder lightly (do not tighten the thumbscrew.). 3. Press "down" key. ...
Page 48: Mechanical Adjustment
46 ⇒ ⇒ ⇒ mechanical adjustment embroidery foot height the distance between the embroidery foot and the surface of the needle plate should be in the range of 1.7 mm to 1.9 mm when the presser bar is lowered. To adjust: 1. Attach the embroidery foot (p). 2. Turn the power switch on while pressing the ...
Page 49: Mechanical Adjustment
47 presser foot lifter button to check: 1. Attach the zigzag foot (a) . 2. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "foot sensor" key. 3. Press the presser foot lifter button to lower the presser foot. Raise ...
Page 50: Mechanical Adjustment
48 cap base cover (a) (b) (a) (b) 33 – 39mm stretch stitch balancing dial ⇒ mechanical adjustment stretch stitch balance when the stretch pattern "8" is sewn 8 times with the stretch stitch balancing dial at the standard setting mark, the length of five of stretch patterns should be in the range of ...
Page 51: Mechanical Adjustment
49 ⇒ mechanical adjustment knee lifter to adjust: 1. Attach the knee lifter. 3. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "knee lifter" key. 3. Attach the knee lifter. Press "mem1" when the knee lifter is free...
Page 52: Mechanical Adjustment
50 ⇒ ⇒ knob mechanical adjustment remaining bobbin thread sensor "key" value "empty" value bobbin holder stopper 1. Prepare the empty bobbin (diameter: 8.4 mm) and the gauge bobbins (diameter: 12.5 mm and diameter: 18.9 mm). 2. Remove the presser foot and needle plate. (see page 4) * you may use a f...
Page 53: Mechanical Adjustment
51 setscrews tp needle plate sensor setscrews tp needle plate base plate fixed cutter spacer micro switch base plate micro switch needle plate sensor knob needle plate 11 – 11.5 mm bottom side of needle plate actuator mechanical adjustment needle plate sensor to remove: 1. Remove the base cover, bed...
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52 ⇒ ⇒ needle plate replacing bar 4. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "other sensor" key. 5. Be sure that "straight" indicates "l", and "zigzag" indicates "h" when the needle plate is attached. 6. Rep...
Page 55: Mechanical Adjustment
53 y-carriage lever cap ⇒ inspection hole y fixing plate setscrew x-carriage mechanical adjustment y-carriage play adjustment there should be no play in the direction of arrow a (see fig. 1). 1. Push down the lever to open the y-carriage. 2. Remove the cap under the embroidery unit (see fig. 2). 3. ...
Page 56: Mechanical Adjustment
54 1. Turn the power switch off. Attach the embroidery hoop. (do not open the y-carriage.) 2. Attach the cloth guide to the embroidery carriage. 3. Turn the power switch on while pressing the start/stop button and the reverse stitch button to enter the factory setting mode. Press "cloth guide" key. ...