Janome DC4030P, Service Manual

Page 1: ...MODEL DC4030P SERVICE MANUAL...

Page 2: ...CHRONIZATION 13 NEEDLE THREAD TENSION 14 STRETCH STITCH FEED BALANCE 15 REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREADER PLATE 16 ADJUSTING BUTTONHOLE LEVER POSITION 17 CONNECTOR DIAGRAM 18 SELF DIAG...

Page 3: ...2 DC4030P SERVICE ACCESS 1 FACE COVER TO REMOVE 1 Remove the 2 setscrews and remove the face cover TO INSTALL 2 Follow the above procedure in reverse Setscrew Face cover...

Page 4: ...REMOVE 1 Set the drop lever to the left and remove the 3 setscrews remove the bed cover TO INSTALL 2 Set the drop lever to the left and install the bed cover Secure the bed cover with the 3 setscrews...

Page 5: ...directly with your fingers and pull Do not pull on the lead wire as this may damage the contact sleeve inside the connector TO INSTALL 4 Follow the above procedure in reverse NOTES TO CONNECT THE CON...

Page 6: ...4 2 Remove the setscrews A B and C then remove the rear cover To remove the cover detach the presser foot lifter section first with the presser foot lifter in the down position TO INSTALL 3 Follow th...

Page 7: ...the feed dog window on the needle plate should be parallel 1 Remove the face cover and raise the presser foot Loosen the setscrew to adjust the presser foot height 6 0 mm and the presser foot alignmen...

Page 8: ...osition is not in the center of the needle plate hole when the straight stitch is selected or if the clearance between the needle and edge of the needle plate hole on both side is less than 0 2 mm whe...

Page 9: ...attern left needle position 3 Remove the bed cover see page 3 4 Turn the handwheel toward you and set the needle bar at the lowest position 5 Loosen the 2 setscrews on the lower shaft gear 6 Raise the...

Page 10: ...side of the needle in ascending travel of needle from its left and lowest position 1 Remove the needle plate and bobbin holder 2 Turn on the power switch 3 Select the pattern left needle position 4 T...

Page 11: ...zag width ADJUSTMENT PROCEDURE 1 Loosen the screws A B C then slightly tighten the hinge screw C 2 Turn the handwheel toward you and adjust the clearance between test pin and the point of the hook in...

Page 12: ...etscrew 3 Turn the lower shaft bushing eccentric bushing clockwise B if there is too much play in the hook Turn the lower shaft bushing eccentric bushing counterclockwise A if there is too little play...

Page 13: ...sure adjusting lever at 3 and lower the presser foot 2 Turn on the power switch 3 Remove the bed cover see page 3 4 Turn the handwheel toward you to set the feed dog at the highest position 5 Loosen t...

Page 14: ...ard you slowly with your hand until the needle start to swing Loosen the setscrew and turn the upper shaft shield plate in the direction of A If the swing point is higher than 8 2 mm B If the swing po...

Page 15: ...e standard range adjust as follows ADJUSTMENT 1 Set the thread tension dial to A and check the thread tension 2 Remove the face cover see page 2 3 If the tension is outside the standard range turn the...

Page 16: ...just as follows ADJUSTMENT PROCEDURE 1 Turn the power switch on and select the stitch pattern 2 Set the slit of the feed balancing dial to the standard setting mark on the front cover 3 Put a piece of...

Page 17: ...edle threader knob and pull the threader plate supporter A down to remove it see FIG 1 2 To install the needle threader plate line the groove up with the pin B and push it up to snap fit TO ADJUST THE...

Page 18: ...er the buttonhole lever Position the buttonhole lever guide so the screen displays L Tighten setscrew A TO ADJUST THE BUTTONHOLE SENSOR POSITION 4 Attach the buttonhole foot R 5 Lower the buttonhole l...

Page 19: ...shaft sensor BLK D Feed motor BLK E Zigzag width motor WHT F DC motor WHT G Power transformer primary circuit BLK H Power transformer secondary circuit RED I Printed circuit board F BLK J Bobbin winde...

Page 20: ...until the step number of the re quired test is indicated PRELIMINARY TEST Turn on the power switch If any of following problems occur take the recommended actions in the order they are shown The machi...

Page 21: ...second If you don t press the reverse button within 2 5 seconds the machine automatically reverts to normal sewing mode Press needle up down button LED displays 02 for one second Press needle up down...

Page 22: ...en the needle is at the lowest position LED displays LH When the needle is halfway LED displays LL LED display is different from that shown to the left 1 Adjust upper shaft shield plate 2 Replace uppe...

Page 23: ...CONDITION 10 Foot controller Press needle up down button the LED displays 10 for one second Depress the foot controller down all the way and release LED display is different from that shown to the le...

Page 24: ...e socket and power transformer connectors pull them while pushing them toward the a board to unlock them TO INSTALL 4 To install follow the above procedure in reverse NOTE When installing board A in t...

Page 25: ...D F TO REMOVE 5 Remove the front cover unit see page 4 6 Unplug the printed circuit board F connector and remove the four CS rings 7 Remove the 2 setscrews and remove the printed circuit board F TO IN...

Page 26: ...move the DC motor and belt TO INSTALL 4 Lightly tighten the 2 setscrews 5 Put the motor belt on the pulley and adjust the belt deflection to about 7 to 9 mm by pressing the middle of the motor belt wi...

Page 27: ...ur setscrews and remove the cover on printed circuit board A 3 Remove the fuse pry it out with a screwdriver TO INSTALL 4 Follow the above procedure in reverse NOTE 1 Replace the printed circuit board...

Page 28: ...Remove the 2 setscrews and remove the machine socket TO INSTALL 3 To install the machine socket follow the above procedure in reverse NOTE Pull out the cord in front of the arm to prevent it from con...

Page 29: ...e the transformer TO INSTALL 3 To install the transformer follow the above procedure in reverse NOTE Slide the two transformer wire tubes to the side of transformer and secure them to the zigzag stepp...

Page 30: ...TO INSTALL 4 To install the zigzag width motor follow the above procedure in reverse NOTE 1 The setscrew of zigzag rod should be tightened to 5 7 kgf of torque 2 Check to ensure that the upper shaft...

Page 31: ...er see pages 4 and 5 2 Remove the snap ring E 3 Disconnect the connector from the board A 3 Remove the two setscrews A B and remove the feed motor TO INSTALL 4 To install the feed motor follow the abo...

Page 32: ...nd the switch fixing plate to 0 7 to 1 3 mm 3 Tighten the setscrew 4 Install the front cover TO CONFIRM Turn the power switch on The LED indicates when the bobbin winder spindle is set the bobbin wind...