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26

REPLACING THE ELECTRONIC COMPONENTS

SWITCHING REGULATOR UNIT

TO REMOVE:
1.  Remove the front cover and the rear cover (see pages 4 to 5).
2.  Remove the setscrews (A) (3 pcs.) and the switching regulator.
3.  Remove the setscrews (B) (4 pcs.).

TO ATTACH:
Follow the above procedures in reverse.

Switching regulator

Setscrew (A)

Setscrew (A)

Setscrew (A)

Setscrew (B)

Setscrew (B)

Summary of Contents for Elnita ec60

Page 1: ...SERVICE MANUAL MODEL ec60 First Edition 07 May 2020...

Page 2: ...ENT OF HOOK TIMING 11 ADJUSTMENT OF NEEDLE BAR HEIGHT 12 CLEARANCE BETWEEN NEEDLE AND TIP OF HOOK ROTARY 13 FEED DOG HEIGHT 14 FEED DOG ADJUSTMENT 15 TOP TENSION 16 REPLACING THE ELECTRONIC COMPONENTS...

Page 3: ...THE RECOMMENDED SEWING NEEDLE AND THREAD USE A HA X 11 BLUE TIP NEEDLE SEE MECHANICAL ADJUSTMENT ADJUSTMENT OF NEEDLE BAR HEIGHT SEE MECHANICAL ADJUSTMENT OF HOOK TIMING SEE MECHANICAL ADJUSTMENT CLE...

Page 4: ...BIN THREAD 1 BOBBIN HOLDER IS INCORRECTLY THREADED 2 TOO MUCH THREAD IS WOUND ON THE BOBBIN 3 LINT IS STUCK INSIDE THE BOBBIN HOLDER 4 THREAD QUALITY IS TOO LOW 5 THREAD IS JAMMING AROUND THE BOBBIN H...

Page 5: ...BELT TENSION 4 NOT ENOUGH OIL 5 UPPER SHAFT GEAR IS LOOSE ELIMINATE THE BACKLASH ELIMINATE THE LOOSENESS SEE PART REMOVAL AND REPLACEMENT DRIVING MOTOR DC MOTOR OIL ALL MOVING PARTS ELIMINATE THE LOOS...

Page 6: ...ANGING EXTERNAL PARTS FACE COVER TO REMOVE 1 Remove the setscrew A and lift the face cover to disengage the rib on the inside Remove the face cover B TO ATTACH 2 Follow the above procedures in reverse...

Page 7: ...HANGING EXTERNAL PARTS FREE ARM COVER TO REMOVE 1 Remove the setscrew A 2 pcs Move the free arm cover B to the left and remove the free arm cover TO ATTACH 2 Follow the above procedures in reverse A A...

Page 8: ...PARTS FRONT COVER 1 TO REMOVE 1 Remove the face cover and free arm cover see pages 4 and 5 2 Remove the setscrews A 2 pcs 3 Remove the setscrews B 2 pcs and back cover C 4 Remove the setscrews D 2 pc...

Page 9: ...over hooks 7 Disconnect all the connectors from the printed circuit board A NOTE Do not disconnect the connectors by pulling on cord To disconnect grasp the connector not the cord 8 Remove the front c...

Page 10: ...ree arm cover see pages 4 and 5 2 Remove the setscrews A 2 pcs 3 Remove the setscrews B 2 pcs 4 Remove the setscrews C 2 pcs and back cover 5 Remove the setscrews D 2 pcs and the rear cover TO ATTACH...

Page 11: ...the feed dog below the needle plate Place a block 6 mm thick under the presser foot and lower the presser foot lifter A 3 Loosen the setscrew B Raise the presser foot lifter and tighten the setscrew...

Page 12: ...the needle hole in the needle plate should be at least 0 2 mm on either side If not adjust as follows 1 Turn the power switch off Remove the face cover see page 4 2 Loosen the hexagonal socket screw...

Page 13: ...n Set the zigzag width at 0 5 Remove the free arm cover Turn the handwheel toward you to lower the needle at its lowest position 6 Loosen the hexagonal socket screw A 2 pcs 7 Move the needle bar 3 4 m...

Page 14: ...bin holder and face plate 2 Turn the power switch on 3 Select the pattern left position Set the zigzag width at 0 4 Turn the handwheel toward you until the tip of hook meets the right side of the need...

Page 15: ...e setscrew A 2 pcs 4 Turn the handwheel toward you Adjust the clearance between the needle and the tip of the rotary hook by moving the hook base plate up or down to within 0 10 to 0 05 mm at the left...

Page 16: ...el toward you to set the feed dog at the highest position 3 Remove the free arm cover 4 Loosen the setscrew A and nut B 5 Adjust the feed dog height by turning the adjusting screw C The highest positi...

Page 17: ...et screw 4 x 6 Insert the screw to the hole B Tighten the hexagonal socket screw as far as it goes 2 Loosen the setscrew C left screw 3 Turn hexagonal socket screw to adjust the feed dog should be par...

Page 18: ...limit adjust as follows 1 Set the tension dial Auto 2 Remove the front cover see pages 6 and 7 3 Lower the presser foot If the top tension is too loose turn the lead screw in the direction A If the t...

Page 19: ...d r y u i o 0 1 Printed circuit board A Printed circuit board F Printed circuit board L q PRINTED CIRCUIT BOARD P w FEED MOTOR e THREAD CUTTER MOTOR r BOBBIN WINDING SWITCH t POWER SWITCH y ZIGZAG WID...

Page 20: ...ectly to the test you want to perform Enter self diagnostic mode then select the step number of the diagnostic test you require by pressing the start stop button TO BEGIN Turn on the switch if any of...

Page 21: ...pushed buzzer sounds and LCD displays BH symbol BH symbol Bobbin symbol If the result is correct condition press the start stop button to proceed the next step If the result is defective condition pr...

Page 22: ...eed the next step Buzzer does not sound Stitch width or length symbol does not appear REMEDY Replace the printed circuit board A Replace the printed circuit board P 06 Upper shaft positioning sensor 0...

Page 23: ...s SC 10 Buzzer does not sound REMEDY Replace the printed circuit board A The machine motor does not start The motor stops immedi ately The motor runs unstable REMEDY Replace the DC motor Replace the p...

Page 24: ...19 to 21 and fix the defective part The defective part number See pages 19 to 21 Steps and items section Turn the power switch off when the self diagnostic test is finished TO DISPLAY THE VERSION OF...

Page 25: ...ed circuit board A 3 Remove the setscrews 6 pcs and the printed circuit board A TO ATTACH 4 Follow the above procedures in reverse NOTE Do not disconnect the connectors by pulling on cord To disconnec...

Page 26: ...1 Turn the power switch on while simultaneously pressing left cursor button and the right cursor button 2 After the buzzer sounds press the locking stitch button q within 2 5 seconds The LCD should d...

Page 27: ...the driving motor and the motor belt Tighten them with setscrews 2 pcs lightly 4 Move the motor up or down to adjust the motor belt tension The belt should deflect 7 to 9 mm when applying 300 grams f...

Page 28: ...1 Remove the front cover and the rear cover see pages 4 to 5 2 Remove the setscrews A 3 pcs and the switching regulator 3 Remove the setscrews B 4 pcs TO ATTACH Follow the above procedures in reverse...

Page 29: ...the buttonhole lever to its lowest position and open a 1 6 mm gap between the slider and the buttonhole foot 6 Turn the adjusting screw to the left until the LCD display BH symbol 7 Next turn the adj...

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