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Janome MC400E, Service Manual

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Janome MC400E Service Manual Download Page 29

27

MC450e

Adjusting the Y-carriage Supporter

Adjustment

1.  Remove the carriage cover (refer to page 6).

2.  Loosen the setscrew (A).

    Adjust the distance between the top of the rail and the 

lower edge of Y carriage to 14.3±0.3 mm. 

3.  Tighten the setscrew (A).

4.  Attach the carriage cover.

Y-carriage supporter

Setscrew (A)

14.3

±0.3

 mm

Lower edge of Y-carriage

Top of the rail

The distance between the top of the rail and the lower edge of Y-carriage should be in the 

range of 14 to 14.6 mm.

Summary of Contents for MC400E

Page 1: ...SERVICE MANUAL MODEL MC400E...

Page 2: ...ase mechanism 15 Height of the embroidery foot 17 Presser foot lifter detecting switch 20 Automatic thread cutter 21 Remaining bobbin thread sensor 22 Hoop position 23 X sensor position 25 Y sensor po...

Page 3: ...erse Face cover Setscrew Replacing the thread cutter cover To remove 1 Remove the cap and setscrew A Stand the machine so the handwheel side comes to the underside of the machine Insert the screwdrive...

Page 4: ...ng the base plate To remove 1 Stand the machine so that the handwheel side comes to the underside of the machine 2 Remove the 6 setscrews A and remove the bottom plate Setscrews A Setscrews A Bottom p...

Page 5: ...placing the bed cover To remove 1 Turn the power switch on to move the carriage to the stored position then turn the power switch off 2 Remove the setscrews A and the needle plate Remove the base plat...

Page 6: ...mbroidery pattern 1 w to move the carriage to the starting position then turn the power switch off Setscrew A q w 2 Loosen the setscrew A Setscrews B 3 Remove the 2 setscrews B near the spool pin 4 Re...

Page 7: ...Setscrew E Setscrew F 3 Remove the 2 setscrews B and 3 setscrews C Y carriage supporter 4 Remove the 2 setscrews D 5 Loosen the setscrew E 6 Loosen the setscrew F and shift the Y carriage supporter up...

Page 8: ...Remove the setscrew A Setscrew A Setscrew B 2 Remove the setscrew B Remove the carriage cover To remove 3 Follow the above procedure in reverse Setscrew A Replacing the Belt Cover To remove 1 Remove t...

Page 9: ...ust the position of the needle 5 Loosen the setscrew B 6 Move the needle drop adjusting plate laterally to adjust the position of the needle 7 Tighten the setscrews 8 Attach the face cover NOTE Check...

Page 10: ...tip of the rotary hook meets the right side of the needle while holding the hand wheel so the needle bar does not move 6 Tighten the setscrews 7 Attach the bobbin holder needle plate and presser foot...

Page 11: ...surface of the rotary hook at 1 6 to 2 0 mm 5 Tighten the setscrews Be sure that the groove of the needle is facing right in the front 6 Attach the bobbin holder needle plate and presser foot Replace...

Page 12: ...clearance between the test pin and the tip of the rotary hook to 0 10 to 0 05 mm by moving the rotary hook set plate up or down 5 Tighten the setscrews A B and C firmly 6 Check the backlash between th...

Page 13: ...of the hook 4 Turn the lower shaft bushing eccentric in the direction A if the gears do not turn smoothly Turn the lower shaft bushing in the direction B if the rotary play is larger than 0 8 mm 5 Ti...

Page 14: ...connect the connectors to the printed circuit board A except printed circuit board L2 and L3 connectors The carriage will not return to the home position after turning the power switch on if the X mot...

Page 15: ...ode Press Phase key Phase key Setscrew C Even Sensor Upper shaft shield plate Fig 1 Bight sensor Upper shaft shield plate Bight shield plate Start stop button Printed circuit board F 7 Loosen the sets...

Page 16: ...t at 3 4 6 The upper thread tension should be 59 to 67 grams when pulling the thread at the speed of 110 mm sec If not adjust the needle thread tension Foot Sensor Tension key Start stop button Pullin...

Page 17: ...st and adjust the thread tension release adjusting plate position then tighten the setscrew B Be sure that the tension release lever touches to the presser foot lifter as shown in Fig C when tightenin...

Page 18: ...stall the needle threader plate line the groove up with the pin B and push it up to snap it To adjust 1 If the hook on the threader plate touches the left or right side of the needle eye loosen setscr...

Page 19: ...d you to lower the embroidery foot at its lowest position 3 Loosen the setscrew A on the presser bar supporter 4 Place the 1 2 mm spacer block between the presser foot and the needle plate 5 Fix the p...

Page 20: ...the connectors Setscrews B Setscrews A Setscrew B Printed circuit board A Case Disconnecting LCD Module Flexible PCB Flexible PCB Lift up the clamp to unlock Close the clamp to lock Touch panel Black...

Page 21: ...pages 1 3 and 4 2 Disconnect the connectors for printed circuit board F from the printed circuit board A 3 Remove the 2 setscrews A and remove the printed circuit board F To attach 4 Follow the above...

Page 22: ...nsion gear Move the thread release plate to the right so that the thread release plate touches to the thread release lever lightly Tighten the setscrew A see Fig A B and C 5 Press Free key Engage the...

Page 23: ...er motor is initialized and moving cutter moves to its home position automatically 4 The distance between the edge of moving cutter and the end of thread cutter plate slit should be 0 8 to 1 6 mm If n...

Page 24: ...holder counterclockwise so that the knob fits to the stopper in the hook race 6 Press Key and read Key value 7 Repeat the procedure 5 to 6 above few times Press Empty when the same Key value is indic...

Page 25: ...Adjust key 5 The hoop moves to its start position Default position X 1000 Y 1400 6 Adjust the hoop position so that the needle drops to the center of the template hole Press or key to adjust the hoop...

Page 26: ...ers as necessary Unplug the connectors from the printed circuit board A Remove the carriage unit To attach 4 Follow the above procedure in reverse NOTE Adjust the Y carriage supporter refer to page 27...

Page 27: ...connect the connectors to the printed circuit board A except printed circuit board L2 and L3 connectors 5 Remove the carriage cover refer to page 6 6 Turn the power switch ON while pressing the start...

Page 28: ...connectors 5 Remove the carriage cover refer to page 6 6 Turn the power switch ON while pressing the start stop button Press SM Init key 7 The gap between the hoop attaching base and Y shaft fixing p...

Page 29: ...istance between the top of the rail and the lower edge of Y carriage to 14 3 0 3 mm 3 Tighten the setscrew A 4 Attach the carriage cover Y carriage supporter Setscrew A 14 3 0 3 mm Lower edge of Y car...

Page 30: ...m plate bed cover and rear cover refer to pages 1 2 3 and 4 2 Remove the connector from the switching power supply 3 Remove the setscrew A and B to remove the switching power supply To attach 4 Follow...

Page 31: ...t removing the front and rear cover may require skills If you are not confident remove the base and front cover to replace it 2 Remove the setscrews A and the DC motor To attach 1 Pass the DC motor co...

Page 32: ...Move the gear B in the direction of the arrow so that the gear B comes in contact with the gear C Tighten the setscrews A firmly Be sure that there is no play between the gears A and B nor between th...

Page 33: ...fore oiling Do not oil any parts other than as explained in this section Use good quality sewing machine oil One or two drops of oil is sufficient Remove excess oil otherwise it may stain fabric Remov...

Page 34: ...the thread cutter cover refer to page 1 Oil the arrow point as indicated Oil the lower shaft supporter front Stand the machine so that the handwheel side comes to the underside of the machine Remove t...

Page 35: ...Oiling the Machine 3 Oil the Y carriage Remove the carriage cover refer to page 6 Oil the arrow points as indicated in the illustration Oil the X carriage Oil the arrow point felt inside of the carri...

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