ELNA E9020 Service Manual Download

Page: 56 / 56

Copyright

2004 ELNA

Printed in JAPAN

Part No. 293-66606

041001 (E)

Summary of Contents for E9020

Page 1: ...E9020 SERVICE MANUAL...

Page 2: ...2 Technical explanation 4 3 Index by troubles mechanical troubles 11 4 How to disassemble the frame components 15 5 Adjustment 17 1 Main unit of sewing machine 17 2 Embroidering device 40 3 Service m...

Page 3: ...thread take up lever 2 Hook Vertical axis full rotary hook The inner hook is equipped with an idling prevention device 3 Drop feed Slide lever type 4 Lighting Built in the face plate cover and in the...

Page 4: ...h its needle up Disengagement of the main shaft is released before stop 3 Automatic backtack sewing By pressing key after selecting the pattern backtack sewing is performed at beginning and end of sew...

Page 5: ...after 1 to 1 5 seconds If the motor becomes extraordinarily hot in such cases as the sewing machine cotinuously runs at high speed the thermal sensor built in the motor detects and stops the machine...

Page 6: ...a pattern has not been specified the machine will not start even by turning ON the S S SW In this case the relevant error message will be given with a buzzer When the S S SW is used to stop the machi...

Page 7: ...bobbin winding switch is ON the relevant message is shown on the display In this state any switch other than the S S SW is not accepted Presser foot lift When the presser foot is raised and S S SW is...

Page 8: ...dog by way of a link Performance of the lateral feed STM Reverse stitching 1 Regular patterns excluding lateral feed straight stitch patterns zigzag patterns and embroidery patterns Turn ON the rever...

Page 9: ...s stopped and only the embroidery frame is moved by the distance 8 The micro switch is used for the detection of the origin 9 A micro switch is mounted on the ejection lever and it informs the micro c...

Page 10: ...in memory with the patterns such as inversion increase decrease two colors small letter vertical writing vertical setting rotation letter interval layout condition etc and the kind of embroidery frame...

Page 11: ...the rotation of the lateral feed stepping motor the drawing roller and the auxiliary roller separate from each other At the same time the drawing stepping motor is joined together with the threading b...

Page 12: ...ted until the winding diameter sensor detects the amount There is the upperlimitation on amount of bobbin winding even when L is set and bobbin winding stops before the sensor detects when the limitat...

Page 13: ...27 20 Disengaging the main shaft P 45 E Longitudinal feed and lateral feed P 27 21 Main shaft disengaging stopper P 21 8 Base tension P 23 12 Adjusting the knife disengagement P 24 13 Lateral positio...

Page 14: ...is improper Front and rear The transfer body is attached to the left side The position of needle clamp threading arm is too high The thread path control plate is attached to the left side The transfer...

Page 15: ...ctive measure Installing position of the face plate is improper The face plate inside cover is moved to the right The face plate installing plate is slantly attached Defective change over of STM Check...

Page 16: ...ead retaining spring Check the retaining force of thread retaining plate A asm only 0 64 to 0 88N 65 to 90g wax coated thread 80 Check the position of thread retaining plate A hook Malfunction of the...

Page 17: ...edle plate Remove screws 2 and loosen screw 3 Drawing section A in the direction insert a thin screwdriver into section C and remove the claw Applying force to section A in the direction insert a thin...

Page 18: ...nd 2 F Rear panel Loosen screw 1 and remove screw 2 G Bottom plate Remove screws 1 through 5 Remove screws 3 and 4 Lower presser lifting lever 5 Lift handle 6 draw section 7 and remove the rear panel...

Page 19: ...the material will enter the slot in the throat plate when the needle penetrates the material Defective feed of material A cause of stitch skipping hitched stitches etc Specify the straight stitching...

Page 20: ...ch the jig needle 29 1 mm to the needle bar 2 Set the needle to the left stitch base line loosen needle bar connection screw 1 and adjust the height of the needle bar so that the jig needle 29 1 mm is...

Page 21: ...k Slightly moving lateral adjustment plate 4 adjust the lateral balance of the needle bar depending on the noise which comes from the contact of the left or right needle with the hook Furthermore turn...

Page 22: ...inner hook If they are applied with oil the outer hook is closely fitted against the inner hookbecause of oil This will impair smooth slip off of the thread from the hook 5 Inner hook detent longitudi...

Page 23: ...awing A 3 to 5 mm 4 0 5 mm A to F on pages 15 and 16 When cam rib is hingest Adjustment drawing B How to adjust Disassembly Location of components to be adjusted Adjustment drawing 8 Base tension A to...

Page 24: ...vided between 1 and 2 should be 1 2 mm 10 1 stitch switch A to F on pages 15 and 16 Adjust while looking from this hole This switch detects the UP state of the presser lifting lever When the presser l...

Page 25: ...on of arrow turn the hook driving shaft pulley by hand to actuate the moving knife Loosen 1 and adjust 2 so that the clearance provided between the looper and the moving knife base should be 0 0 2 mm...

Page 26: ...mm when the moving knife starts and travels backward from the rightmost end as shown in the figure 2 Loosen screw 1 and adjust the longitudinal position so as to align the front end of the square hole...

Page 27: ...the looper How to adjust Adjustment drawing How to adjust Disassembly Location of components to be adjusted Adjustment drawing Adjusting the height of the looper thread retaining at the time of threa...

Page 28: ...wn in the adjustment drawing and measure the tension at a constant speed Throat plate 1 Adjust the longitudial position of 1 so that the belt tension is 3 to 4 mm with 0 98 N 100g load and tighten scr...

Page 29: ...engaging cam and the main shaft hand wheel 2 Cam section of the main shaft disengaging cam 3 Top end section of the main shaft disengaging stopper Relation of the position of the main shaft disengagin...

Page 30: ...g guide left should come in contact with the side face of the needle when the needle threading lever is pressed down to the lowest position of its stroke to make the needle threading hook rotate If th...

Page 31: ...working body 9 by approximately 12 mm set 5 and tighten screw 4at the position of 30 in the direction of deflecting the spring 24 Automatic needle threading mechanism 24 1 Adjusting the upper positio...

Page 32: ...the longitudinal position of 4 so that the installing plane of the transfer body is level at the lower position as shown in the figure At this time the distance from the top end of the transfer body...

Page 33: ...body to the needle is 4 5 to 5 mm at the lower positon of the transfer body 24 4 Lateral adjustment of the the transfer body 0 6 to 1 mm How to adjust Adjustment drawing How to adjust Adjustment draw...

Page 34: ...provided between the threading body and the face plate is 1 to 2 mm when threading body 3 rotates and comes down to the position of the thread take up spring guide section of the face plate 24 6 Adju...

Page 35: ...hole and loosen the thread retaining plate C setscrew to adjust the height Adjust the height so that the clearance provided between the upper plane rib which is higher of the bobbin rib and the botto...

Page 36: ...djust so that the narrowest clearance clearance provided between the outer hook fixed knife installing base and the top end of thread retaining plate A is 0 1 to 0 3 mm when making thread retaining pl...

Page 37: ...d 0 3 t o 1 m m How to adjust Adjustment drawing Thread retaining plate A Needle thread catching plate setscrew Q Needle thread catching plate Make thread retaining plate A travel to the forward end p...

Page 38: ...en searched and adjust VR1 so that the scale of the tester is 3 8V to 4 2V 3 Return the hand wheel to its home position to complete the procedure 26 1 Adjusting VR1 variable resistor 1 adjusting the b...

Page 39: ...ew 1 in the hook driving shaft support A installing plate from the bottom surface of the bobbin thread mechanism base and make hook driving shaft support A asm 2 slightly come in contact with hook dri...

Page 40: ...t it bends upward by 0 05 mm 29 Adjusting the main shaft support How to adjust Adjustment drawing Fix driving gear cover 1 at the position where the groove for screwdriver comes to the center of the o...

Page 41: ...en the jig of 0 2 mm is put between the thread breakage shielding plate and the thread take up spring cushion and OPEN is set when the jig of 0 4 mm is put between them After the completion of adjustm...

Page 42: ...rom the main frame asm 7 Remove the motor asm Two screws 8 Replace the motor with a new one Backlash in the gear 0 to 0 02 mm 9 When the belt is removed Y STM confirm that the belt is adjusted properl...

Page 43: ...tch asm X drive drive shaft holder presser X drive plate asm Main frame asm A m m 0 98 N 100g Belt Pulley asm Y belt presser Clearance gauge of 1 mm If the belt is excessively tensed the STM will step...

Page 44: ...n switch plate comes in contact with the lever switch link and the lever switch link lightly moves with the spring pressure Slowly return the connecting slider and make sure that the reference line th...

Page 45: ...can be confirmed by rotating hand wheel by hand Adjusting position of touch panel and LCD screen Material thickness reading can be adjusted This setting is related to thread tension Sensor at memory c...

Page 46: ...right side is pressed 5 Press Save key and Pictograph is displayed Never turn OFF the power to the machine while this message is being displayed Setting will be broken 6 When the message of Pictograph...

Page 47: ...performed When start key is pressed confirmation of sewing can be performed When start key is pressed confirmation of sewing can be performed 1 Sewing conditions Speed VR max high speed Material ELNA...

Page 48: ...0 if timing 110 to 287 is within the range of STM drive possibility 2 If timing 287 to 110 is outside of STM drive possibility peep is displayed and when hand wheel is turned by hand and exceeds 110 p...

Page 49: ...otates Press to stop the sewing machine Bobbin thread sensor does not work unless the sewing machine rotates 3 Limit sensor check 0 is displayed when limit sensor is in ON state 1 is displsyed when th...

Page 50: ...on 4 SW D Position of thread release 2 3 Tests below can confirm the functions on the microcomputer circuit board Turn OFF the power to the machine and from the state that 1 2 pins and 3 4 pins of CN1...

Page 51: ...N 4 2 1 2PIN 3 4PIN 10 5PIN 5V 7PIN GND 1 2PIN 3 4PIN 4 2 1PIN GND For assembling 2PIN 20 to 24V 7PIN GND 6PIN 5V 1PIN 5V 2PIN GND 270 1 5PIN GND 3PIN 5V 1 3PIN 2 4PIN 20 Connector No CN 20 CN 21 CN 2...

Page 52: ...7 8 9 0 1 3 4 5 6 8 9 0 1 2 3 4 5 68 7 8 9 4 Remaining amount sensor circuit board receiving light Bobbin thread remaining amount sensor Limit sensor 5 Feed STM 6 Needle throw STM 7 Disengagement det...

Page 53: ...01 To the power circuit board To the back light Replacing procedure of the fuse C Remove the belt cover D Remove two setscrews of the power box asm E Draw out the power box asm F Replace the blown fus...

Page 54: ...eel and the power box Transformer Replacing the transformer I D r a w o u t t h e r e l a t e d connectors after performing the work of disassembling described on pages 15 and 16 A to F remove three s...

Page 55: ...YELLOW WHITE GRAY PURPLE BLUE RED BROWN BLACK RED BLACK WHITE Point of end CN1 1 CN1 2 CN1 3 CN1 4 CN1 5 CN1 6 CN1 7 CN1 8 CN1 9 CN1 10 CN1 11 CN1 12 CN1 13 CN1 14 Remarks S S SLED1 GND SLED2 REV rev...

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