Table of Contents
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Table of Contents
Related Manuals for Janome MC300E
Summary of Contents for Janome MC300E
- Page 1 SERVICE MANUAL & PARTS LIST MC300E...
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Page 2: Table Of Contents
TABLE OF CONTENTS MECHANICAL ADJUSTMENT Changing External Parts (1) Face Cover ..............1 Changing External Parts (2) Belt Cover ..............2 Changing External Parts (3) Base Cover ..............3 Changing External Parts (4) Bed Cover/ Base Lid (2) ..........4 Changing External Parts (5) Base Unit .............. -
Page 3: Changing External Parts (1) Face Cover
MC300E Changing External Parts (1) Face Cover Replacing the face cover To remove: 1. Remove the Cap and Screw and remove the Face Cover Screw Face cover To attach: 2. Attach the Face Cover and tighten Screw , then attach the Cap... -
Page 4: Changing External Parts (2) Belt Cover
MC300E Changing External Parts (2) Belt Cover Replacing the belt cover To remove: 1. Remove the Cap and Screw (A) 2. Loosen Screw (B) 3. Lay the machine down on its back and remove Screws C and D , then remove the Belt cover... -
Page 5: Changing External Parts (3) Base Cover
MC300E Changing External Parts (3) Base Cover Replacing the base cover To remove: 1 Remove Screws (4 pieces) to remove the base cover Screw Base cover To attach: 2 Follow the above procedure in reverse. -
Page 6: Changing External Parts (4) Bed Cover/ Base Lid (2)
MC300E Changing External Parts (4) Bed Cover / Base Lid (2) Replacing the bed cover To remove: 1 Remove the base cover. 2 Remove Screws (A) (2 pcs.), and remove the Base lid (1) 3 Remove Screws (B) (2 pcs.), and remove the Bed... -
Page 7: Changing External Parts (5) Base Unit
MC300E Changing External Parts (5) Base Unit Base To remove: 1 Remove the Belt cover. (See page 2) 2 Remove Screws (A) (4 pcs.), and remove the base unit . 3 Disconnect the X Motor and Y Motor connectors from the printed circuit board (A). -
Page 8: Changing External Parts (6) Front Cover
MC300E Changing External Parts (6) Front Cover Front cover To remove: 1 Remove the face cover, belt cover, base cover and bed cover. (See page 1 - 4). 2 Remove Screw (A) and remove the Arm thread guide (lower) 3 Remove Screw (B) -
Page 9: Changing External Parts (7) Rear Cover
MC300E Changing External Parts (7) Rear Cover Rear cover To remove: 1 Remove the face cover and belt cover. 2 Loosen Screws (A) , and (B) 3 Raise the handle and remove Screw (C) , and , then remove Screw (D) -
Page 10: Adjusting Needle Drop Position
MC300E Adjusting Needle Drop Position The needle should be positioned in the center of needle plate hole. 1 Lower the Needle to its lowest position by turning the handwheel. 2 Remove the face cover and loosen Screw move the Needle bar supporter... -
Page 11: Adjusting Hook Timing
MC300E Adjusting Hook Timing The amount of ascending travel of the needle bar from its lowest position to the position where the tip of the rotary hook meets the right side of the needle should be 3.1 to 3.7 mm. -
Page 12: Adjusting Needle Bar Height
MC300E Adjusting Needle Bar Height The standard distance between the upper edge of the needle eye and the tip of the rotary hook should be in the range of 1.6 - 2.0 mm when the rotary hook meets the right side of the needle in ascending travel of needle from its lowest position. -
Page 13: Adjusting Clearance Between Needle And Hook
MC300E Adjusting Clearance between Needle and Hook The clearance between needle and rotary hook should be -0.10 to + 0.05 mm. 1 Remove the needle plate, bobbin holder, base cover and bed cover (See page 3 - 4). Replace the needle with the Test pin... -
Page 14: Adjusting Backlash Between Hook Drive Gear And Lower Shaft Gear
MC300E Adjusting Backlash between Hook Drive Gear and Lower Shaft Gear The rotary play of the hook should be 0.8 mm or less. Adjust the backlash after the adjustment of the clearance between needle and rotary hook. To check: 1 Turn the power switch “OFF”. -
Page 15: Adjusting Upper Shaft Shield Plate Position
MC300E Adjusting Upper Shaft Shield Plate Position The standard height of needle stop position should be 14.2 mm above the needle plate surface when the machine is topped. 1 Remove the front cover unit. (See page 6) 2 Turn the power switch “ON” and press Start / Stop button twice. -
Page 16: Adjusting Needle Thread Tension
MC300E Adjusting Needle Thread Tension The standard upper thread tension should be 51 to 59 grams when the tension dial is set at “3”, measured with a #50 polyester thread being pulled at approximately 110 mm/sec. in the direction of arrow. -
Page 17: Adjusting Tension Release Mechanism
MC300E Adjusting Tension Release Mechanism When the presser foot lifter is raised, the tension release mechanism should work correctly. If not, adjust as follows. 1 Remove the front cover unit. (see page 6) 2 Lower the presser foot lifter, set the thread tension dial at “9”... -
Page 18: Changing Thread Tension Unit
MC300E Changing Thread Tension Unit Replacing the thread tension unit To remove: 1 Remove the front cover unit. (See page 6) 2 Remove Screws (A) , (B) , and remove the thread tension unit. To attach: 3 Follow the above procedure in reverse. -
Page 19: Replacing Threader Plate And Adjustment
MC300E Replacing Threader Plate and Adjustment If the hook on the threader plate is damaged, replace it asfollows. To replace: 1 Pry out the Threader plate holder with screwdriver Fig. 1 while pushing and holding the Threader knob (See fig.1.). -
Page 20: Adjusting Height Of Embroidery Foot P
MC300E Adjusting Height of Embroidery Foot P Space between the needle plate and the bottom surface of the Foot (P) should be 1.0 to 1.6 mm, when the needle bar is at its lowest position. 1 Remove the front cover unit. (See page 6) 2 Lower the needle bar and lower the presser foot lifter. -
Page 21: Connector Connection Diagram
MC300E Connector Connection Diagarm Please see the following connector connection diagram for the printed circuit board A. Touch panel Switching power supply ( White ) LCD Harness X- Motor ( Blue ) Printed circuit board F( Black ) Y- Motor ( White ) -
Page 22: Replacing Printed Circuit Board
MC300E Replacing Printed Circuit Board A To remove: 1 Remove the front cover. (See page 6) 2 Pull out the connectors of printed circuit board F LCD Harness, Inverter and Touch panel. 3 Remove Screws (5 pieces) and the Printed... -
Page 23: Replacing Touch Panel
MC300E Replacing Touch Panel To remove: 1 Remove the front cover. (See page 6) 2 Pull out the Connectors of printed circuit board , LCD Harness and Inverter connector and Touch panel connectors 3 Remove Screws (4 pieces) and remove the... -
Page 24: Replacing Printed Circuit Board F
MC300E Replacing Printed Circuit Board F To remove: 1 Remove the front cover. (See page 6) 2 Pull out the connectors from the printed circuit board A. 3 Remove Screws (2 pieces) and remove the Printed circuit board F To attach: 4 Follow the above procedure in reverse. -
Page 25: Adjusting Solenoid
MC300E Adjusting Solenoid 1. Remove the front cover. (See page 6) 2. Loosen Screws (2 pieces). 3. Slide the Solenoid to the right most position. 4 Tighten Screws Screw (A) Solenoid Tension disc Tension disc holder Plunger Slide to the right. -
Page 26: Replacing Dc Motor And Motor Belt Tension Adjustment
MC300E Replacing DC Motor and Motor Belt Tension Adjustment Replacing DC Motor To remove: 1 Remove the belt cover. (See page 2) 2 Remove the Motor belt 3 Disconnect the Motor connector from the printed circuit board A. 4 Remove Screws (A) (2 pieces) and replace the motor. -
Page 27: Replacing Carriage Plate (Unit)
MC300E Replacing Carriage Plate (Unit) To remove: 1 Turn the power switch “ON” and select the pattern No.1. 2 Turn the power switch “OFF” and remove the Cover . (Unlock the hook from the inside.) 3 Turn the power switch “ON” to return the carriage to the home position. -
Page 28: Adjusting X And Y Sensors
MC300E Adjusting X and Y Sensors To adjust X and Y sensors: 1 Turn the power switch “ON” (The carriage is automatically set at starting position.) 2 Turn the power switch “OFF” and then remove the base unit. 3 Loosen Screw A... -
Page 29: Adjusting X And Y Sensors (Instant Adjustment)
MC300E Adjusting X and Y Sensors (Simple Adjustment) To adjust X and Y sensor (without removing the base unit): 1 Remove the base cover. 2 Remove the presser foot holder and place the fabric on the Embroidery hoop (A). Attach the Embroidery hoop (A) on the carriage. -
Page 30: Adjusting X Motor Gear
MC300E Adjusting X Motor Gear If the machine is noisy when sewing an embroidery design, adjust the X-Motor as follows. To remove: 1 Remove the base unit (See page 5). 2 Remove the presser foot. 3 Remove Screw (A) and remove the Nylon clip from the cords. -
Page 31: Replacing Switching Power Supply
MC300E Replacing Switching Power Supply To remove: Remove the face cover, belt cover, front cover and rear cover. Remove Screws (A) ,(B) and remove the machine socket and fixing plate. Pull out the Machine socket unit connector Remove Screw (C) and remove the Idler.