ELNA 8300 Service Manual
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ELNA 8300 Service Manual

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SERVICE MANUAL
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PARTS LIST
MODEL 8300

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Summary of Contents for ELNA 8300

  • Page 1 SERVICE MANUAL & PARTS LIST MODEL 8300...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS GENERAL TROUBLE SHOOTING PROCEDURE ................. 2 CHANGING EXTERNAL PARTS (1) FACE COVER/TOP COVER ............3 CHANGING EXTERNAL PARTS (2) BELT COVER ................4 CHANGING EXTERNAL PARTS (3) BASE COVER ................5 CHANGING EXTERNAL PARTS (4) BED COVER/BASE LID(2) ............6 CHANGING EXTERNAL PARTS (5) BASE UNIT ...................
  • Page 3 Model 8300 Safety Precautions and Important Notes Warning! Disconnect the mains plug from the power outlet before making any adjustments to the machine or replacing the parts. Wait about 30 seconds after disconnecting the plug (capacitor discharge). 1. This service manual is intended to help with minor repairs and adjustments. The instructions do not claim to be complete or comprehensive.

  • Page 4: General Trouble Shooting Procedure

    Model 8300 GENERAL TROUBLE SHOOTING PROCEDURE START IS NEEDLE SET OK? IS POWER SUPPLY OK? BASIC CHECK IS THREADING OK? N.G. O.K. CORRECT IT MECHANICAL ELECTRICAL CAN’T JUDGE O.K. ELECTRIC QUICK CHECK N.G. ADJUSTMENT REPLACE PARTS SEWING CHECK ELECTRIC QUICK CHECK...

  • Page 5: Changing External Parts (1) Face Cover/Top Cover

    Model 8300 Changing External Parts (1) Face Cover / Top cover Replacing th face cover To remove: 1. Remove the Cap and Screw and remove the Face Cover Screw Face cover To attach: 2. Follow the above procedure in reverse.

  • Page 6: Changing External Parts (2) Belt Cover

    Model 8300 Changing External Parts (2) Belt Cover Replacing the belt cover To remove: 1. Remove the Cap and Screw 2. Raise the Carrying Handle and remove the Screw 3. Lay the machine on its back and remove Screws (2 pcs. gold color), then remove the Belt cover...

  • Page 7: Changing External Parts (3) Base Cover

    Model 8300 Changing External Parts (3) Base Cover Replacing the base cover To remove: 1. Remove Screws (4 pieces) to remove the base cover Screws Base cover To attach: 2. Follow the above procedure in reverse.

  • Page 8: Changing External Parts (4) Bed Cover/Base Lid(2)

    Model 8300 Changing External Parts (4) Bed Cover / Base Lid (2) Replacing the bed cover To remove: 1. Remove the base cover. (See page 5) 2. Remove Screw (2 pcs.), and remove the Base 3. Remove Screw (2 pcs.), and remove the Bed...

  • Page 9: Changing External Parts (5) Base Unit

    Model 8300 Changing External Parts (5) Base Unit Base To remove: 1. Remove the Belt cover. (See page 4) 2. Remove Setscrew (4 pcs.), and remove the base unit . 3. Remove the X-Motor Connector and Y-Motor Connector from the printed circuit board “A”.

  • Page 10: Changing External Parts (6) Front Cover

    Model 8300 Changing External Parts (6) Front Cover Front cover To remove: 1. Remove the face cover, belt cover, base cover and top cover. (See pages 3-5). 2. Remove Screw and remove the Arm thread guide (lower) 3. Remove Screw 4.

  • Page 11: Chnaging External Parts (7) Rear Cover

    Model 8300 Changing External Parts (7) Rear Cover Rear cover To remove: 1. Remove the face cover and belt cover. 2. Loosen Screw , and remove the rear cover. To attach: 3. Follow the above procedure in reverse. Carriage Rear cover...

  • Page 12: Adjusting Needle Drop Position

    Model 8300 Adjusting Needle Drop Position The needle should be positioned at the center of the 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 13: Adjusting Hook Timing

    Model 8300 Adjusting Hook Timing The hook timing is that amount of ascending travel of the needle bar from its lowest position to where the tip of the rotary hook meets the right side of the needle should be 1.65 to 1.95 mm.

  • Page 14: Adjusting Needle Bar Height

    Model 8300 Adjusting Needle Bar Height The standard distance between the top of the needle eye and the upper surface of the hook race should be in the range of 3.2 - 3.6 mm when the rotary hook meets the right side of the needle in ascending travel of needle from its lowest position.

  • Page 15: Adjusting Clearance Between Needle And Hook

    Model 8300 Adjusting Clearance between Needle and Hook The clearance between needle and rotary hook should be - 0.1 to + 0.05 mm. 1. Remove the needle plate, bobbin holder, base cover and bed cover (See pages 5 - 6).

  • Page 16: Adjusting Backlash Between Hook Drive Gear And Lower Shaft Gear

    Model 8300 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.

  • Page 17: Adjusting Height Of The Needle Stop Position

    Model 8300 Adjusting Height of the Needle Stop 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 top cover unit. (See page 3) 2. Turn the power switch “ON” and press Start / Stop button twice.

  • Page 18: Adjusting Thread Tension

    Model 8300 Adjusting Thread Tension Bobbin Thread Tension: The standard bobbin thread tension should be 9 to 11 grams measured with a #50 polyester thread being pulled at approximately 50 mm/sec. in the direction of arrow. Adjust the bobbin thread tension by turning the...

  • Page 19: Adjusting Tension Release Mechanism

    Model 8300 Adjusting Tension Release Mechanism When the presser foot lifter is raised, the tension disks should open approximately 1.0 mm. When the presser foot lifter is lowered, the tension disks should close and the tension release plate (2) should be free from tension.

  • Page 20: Chnaging Thread Tension Unit

    Model 8300 Changing Thread Tension Unit Replacing the thread tension unit To remove: 1. Remove the front cover unit. see page 8) 2. Remove Screws 3. Remove the thread tension unit. To attach: 3. Follow the above procedure in reverse.

  • Page 21: Replacing Threader Plate And Adjustment

    Model 8300 Replacing Threader Plate and Adjustment If the hook on the threader plate is damaged, replace it by following the instructions below. To replace (Fig. 1): 1. Remove the presser foot. 2. Push down the Threader supporter plate remove from the Pin .

  • Page 22: Replacing Thread Cutter

    Model 8300 Replacing thread cutter To replace the thread cutter, follow the procedure below. Screw (A) Free arm cover To remove: 1. Remove the needle plate and the bed cover. 2. Loosen the screw (A). Remove the free-arm cover. 3 Remove setscrews(B), then remove the thread cutter (unit).

  • Page 23: Replacing Thread Cutter

    Model 8300 Replacing thread cutter To check thread cutter function To check: Gothic 1. Select monogramming. 2. Select letter size “S”. 3. Press “I” 10 times. Press OK key. Font 4. Press “Color change” key. Edit Mode 5. Set the hoop and start sewing.

  • Page 24: Adjusting Height Of Embroidery Foot P

    Model 8300 Adjusting Height of Embroidery Foot P Attach the Foot (P), and the 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.

  • Page 25: Connector Connection Diagram

    Model 8300 Connector Connection Diagram Please see the following connector connection diagram for the printed circuit board A. Touch panel Y- Motor (White) LCD Harness Thread cutter switch (Black) Presser foot lifter sensor (Red) Thread cutter solenoid (Red) Thread detection sensor ( Red )

  • Page 26: Replacing Printed Circuit Board A

    Model 8300 Replacing Printed Circuit Board A To remove: 1 Remove the front cover. (See page 8) 2 Pull out the connectors of printed circuit board F LCD Harness, Inverter and Touch panel. 3 Remove Screws (6 pcs.) and the Printed...

  • Page 27: Replacing Touch Panel

    Model 8300 Replacing Touch Panel To remove: 1 Remove the front cover. (See page 8) 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 28: Touch Screen Calibration

    Model 8300 Touch Screen Calibration Adjust the key position of the touch screen after replacing the touch panel, or if the key position is out of alignment. Note: Do not press any key other than those described in the following sections. These keys are not for servicing but for factory use only.

  • Page 29: Replacing Printed Circuit Board F

    Model 8300 Replacing Printed Circuit Board “F” To remove: 1. Remove the front cover. (See page 8) 2. Pull out the connector from the printed circuit board “A” (Mainboard) (See page 25). 3. Remove Screws (2 pieces) and remove the Printed circuit board “F” (Start/Stop) To attach: 4.

  • Page 30: Adjusting Of The Solenoid

    Model 8300 Adjustment of the Solenoid 1. Remove the top cover. (see page 3) 2. Loosen the setscrews 3. Adjust the clearance of Solenoid 1.6 mm with the tension disk closed. 4. Tighten the setscrew The plunger is drawn 1.6mm...

  • Page 31: Adjusting Upper Shaft Release Cam And Clutch Release Arm

    Model 8300 Adjusting Upper shaft release arm cam and Clutch release arm 1. Remove the front cover (unit) and the rear cover (unit). 2. Remove screws A q and the bobbin winder (unit) w. 3. Loosen screws B e. 4. Adjust the clearance between the clutch release arm r and the clutch ring t to 1mm.

  • Page 32: Adjusting Thread Cutter Solenoid

    Model 8300 Adjusting thread cutter solenoid The standard clearance between the plunger and the thread cutter solenoid should be 2.0 mm. Remove the belt cover and base (see page 6, 7). Adjust the clearance between the plunger and the thread cutter solenoid q by moving the thread cutter solenoid setting plate .

  • Page 33: Adjusting Thread Cutter

    Model 8300 Adjusting thread cutter Adjust the thread cutter switch as follows. 1 Remove the needle plate, the bed cover and the free arm cover (see page 8 and 20). 2 Turn the power switch q on while the Start/Stop button w.

  • Page 34: Adjusting Thread Holding Solenoid

    Model 8300 Adjusting Thread Holding Solenoid The standard clearance of the thread drawing lever from the surface of bobbin holder should be 1.5 mm when the solenoid is activated. Screw (A) Thread holding solenoid Remove the belt cover, base and bed cover (See page 6, 8 and 9).

  • Page 35: Adjusting Thread Drawing Lever

    Model 8300 Adjusting Thread Drawing Lever Standard height of the thread drawing lever from the surface of bobbin holder should be 4.1 mm. Remove the needle plate. Loosen the hexagonal socket bolt and adjust the distance of the thread drawing lever by moving the View A thread drawing lever.

  • Page 36: Adjusting The Presser Foot Lifter Sensor

    Model 8300 Adjusting the Presser Foot Lifter Sensor Adjust the presser foot lifter sensor after replacing the presser lifter sensor or circuit board A. Remove the top cover. (See page 3) Turn the power switch on while pressing the Start/Stop button.

  • Page 37: Adjusting The Remaining Bobbin Thread Level

    Model 8300 Adjusting the Remaining Bobbin Thread Level Adjust the remaining bobbin thread level after replacing the circuit board A. Turn the power switch on while pressing the Start/Stop button. Do not release the button until the LCD screen shows the adjusting mode.

  • Page 38: Replacing Dc Motor And Motor Belt Tension Adjustment

    Model 8300 Replacing DC Motor and Motor Belt Tension Adjustment Replacing DC Motor 1. Remove the belt cover. (See page 4) 2. Remove the motor belt. 3. Remove the Motor connector from the printed circuit board “A” (Main board). 4. Remove Screw 5.

  • Page 39: Replacing Carriage Plate Unit

    Model 8300 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 40: Adjusting X And Y Sensors

    Model 8300 Adjusting X and Y Sensors To adjust X and Y sensors: 1. Turn the power “ON” to return the carriage to the home position. (X-1) 2. Turn the power “OFF” and then remove the base 69.0 mm unit.

  • Page 41: Adjusting X And Y Sensors (Simple Adjustment)

    Model 8300 Adjusting X and Y Sensors (Simple Adjustment) To adjust X and Y sensor (without removing the base unit): 1. Remove the base cover.(see page 5) 2. Remove the presser foot and attach the Embroidery hoop “A” 3. Turn the power “ON” and select the pattern No.1...

  • Page 42: Adjusting X Motor Gear

    Model 8300 Adjusting Carriage Motor Gear If the carriage motor gear sounds noisy when sewing the embroidery stitches, follow the instructions below. 1. Remove the base unit (See page 7). 2. Remove Screw and Nylon clip 3. Attach the X and Y motor connectors to printed circuit board “A”...

  • Page 43: Replacing Switching Power Supply

    Model 8300 Replacing Switching Power Supply Replacement of Switching Power Supply To remove: 1. Remove the face cover, top cover, belt cover, front cover and rear cover. 2. Remove Screws and remove the machine socket and fixing plate. 3. Pull out the Machine socket unit connector 4.

  • Page 44: Oiling

    Model 8300 Oiling Apply a few drops of high quality sewing machine oil to the points indicated by the arrows.

  • Page 45: Parts List

    MODEL 8300 PARTS LIST...
  • Page 46 MODEL 8300 PARTS LIST Part Number Name 854621004 Needle plate (unit) 854104006 Needle plate 846030005 Hook cover plate supporter 846222109 Rotation stopper 825016000 Hook cover plate release button 825017001 Hook cover plate holder spring 820374004 Setscrew 2x2.2 854105007 Bobbin threader holder lever...
  • Page 47 MODEL 8300 PARTS LIST...
  • Page 48 MODEL 8300 PARTS LIST Part Number Name 853601809 Top cover (unit) 853602800 Top cover (unit) 853005003 Top cover 852068001 Reference chart 853603306 Top cover compartment (unit) 830013003 Top cover hinge 830190005 Washer 000161103 Setscrew 3x6 000080901 Setscrew 4x25 000081005 Setscrew 4x8...
  • Page 49 MODEL 8300 PARTS LIST...
  • Page 50 MODEL 8300 PARTS LIST Part Number Name 852005154 Needle bar supporter (unit) 751014006 Needle bar supporter 000111902 Setscrew 3x4 830609703 Needle bar (unit) 857602008 Needle threader setting plate (unit) 751047008 Needle bar connceting stud 000111201 Setscrew 4x4 857037006 Needle threader setting plate...
  • Page 51 MODEL 8300 PARTS LIST...
  • Page 52 MODEL 8300 PARTS LIST Part Number Name 852638008 Clutch solenoid (unit) 852065008 Solenoid set plate 852646009 Solenoid (unit) 000004303 Spring pin 3x20-ACP 000002507 Snap ring E-4 000101105 Setscrew 3x4 852639009 Clutch base plate (unit) 852069002 Clutch base plate 852070006 Clutch starting lever...
  • Page 53 MODEL 8300 PARTS LIST...
  • Page 54 MODEL 8300 PARTS LIST Part Number Name 852009004 Presser bar bushing 830030006 Presser bar spring 830029002 Presser bar 830810042 Embroidery foot 763048006 Setscrew 830586035 Presser bar supporter (unit) 000111500 Setscrew 4x8 000116608 Wave washer 830035115 Presser bar lifter 822072005 Presser bar lifter pin...
  • Page 55 MODEL 8300 PARTS LIST...
  • Page 56 MODEL 8300 PARTS LIST Part Number Name 850165003 Timing belt 854639201 Upper shaft (unit) 000078319 Setscrew 3x6 000110901 Hexagonal socket screw 5x4 000111706 Hexagonal socket screw 5x8 829042007 Upper shaft front bushing 000038605 Washer 639095000 Uppere shaft ring 000101703 Setscrew 4x12...
  • Page 57 MODEL 8300 PARTS LIST...
  • Page 58 MODEL 8300 PARTS LIST Part Number Name 854629002 Rotary hook (unit) 846632003 Bobbin holder stopper (unit) 627190010 Magnet 000070506 Washer 000081005 Setscrew 4x8 846652102 Bobbin holder (unit) 102261103 Bobbin 820672005 Lower shaft ring (unit) 820166001 Lower shaft ring 000111201 Hexagonal socket screw 4x4...
  • Page 59 MODEL 8300 PARTS LIST...
  • Page 60 MODEL 8300 PARTS LIST Part Number Name 852641004 Front cover (unit) 857005706 Front cover 852610107 LCD (unit) 857008008 LCD fixing plate (upper) 857621003 LCD fixing plate (lower) (unit) 850612103 Inverter (unit) 852505005 LCD harness (unit) 852633106 Printed circuit board A (unit)
  • Page 61 MODEL 8300 PARTS LIST...
  • Page 62 MODEL 8300 PARTS LIST Part Number Name 852643006 Bobbin winder (unit) 852644007 Bobbin winder (unit) 823119008 Spring 854140107 Bobbin winder plate 000001609 Snap ring 5 852615009 Bobbin winder switch (unit) 852510003 Micro switch (unit) 852042009 Switch fixing plate 2 852014002...
  • Page 63 MODEL 8300 PARTS LIST...
  • Page 64 MODEL 8300 PARTS LIST Part Number Name 852634004 Thread cutter (unit) 860625100 Thread cutter (unit) 000081005 Setscrew 4X8 852057007 Thread cutter cover set plate 000101105 Setscrew 3X4 854631007 Needle thread solenoid (unit) 854508004 Needle thread solenoid (unit) 854127005 Solenoid set plate 000163806 Setscrew 2.6X4...
  • Page 65 MODEL 8300 PARTS LIST...
  • Page 66 MODEL 8300 PARTS LIST Part Number Name 851617008 Idler (unit) 851039000 Idler base 625217100 Idler 000002806 Snap ring 6 000081005 Setscrew 4x8 857002002 Handle plate rear 853614207 Belt cover (unit) 852031304 Belt cover 832099009 Belt cover set plate 000161103 Setscrew 3x6...
  • Page 67 MODEL 8300 PARTS LIST...
  • Page 68 MODEL 8300 PARTS LIST Part Number Name 852617300 Base (unit) 830150003 Rubber foot 820350004 Adjusting screw 820351005 Adjusting screw spring 605074008 Rubber foot 813123004 Snap ring 850151017 Base lid 810220106 Setscrew 832146002 Base lid (1) 851053103 Base cover 000101426 Setscrew 4x6...
  • Page 69 MODEL 8300 PARTS LIST...

  • Page 70: Parts List

    MODEL 8300 PARTS LIST Part Number Name 852801004 Accessory (unit) 102261103 Bobbin 102403109 Felt 802424004 Lint brush 820832005 Screwdriver (large) 822814007 Scissor 625031500 Spool pin 822019509 Spool holder (small) 852802108 Needle (unit) 822020503 Spool holder (large) 829803004 Spool stand 653802002...

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