Table Of Contents - ELNA Elinita EF72 Service Manual

Table of Contents

INDEX

Face plate ......................................................................................................................................................... 1

Top cover .......................................................................................................................................................... 1

Belt cover ......................................................................................................................................................... 2

Base ................................................................................................................................................................. 2

Power supply cover .......................................................................................................................................... 3

Thread cutter cover .......................................................................................................................................... 3

Front cover ....................................................................................................................................................... 4

Thread guide coverr ......................................................................................................................................... 5

Arm thread guide unit ....................................................................................................................................... 6

Replacing Electronic Components

Changing the printed circuit board A ................................................................................................................ 7

Changing the printed circuit board K ................................................................................................................ 8

Changing the printed circuit board F and slide volume .................................................................................... 9

Changing LCD ................................................................................................................................................ 10

Wiring diagram ................................................................................................................................................11

Mechanical Adjustment

Needle drop position ...................................................................................................................................... 12

Backlash between hook drive gear and lower shaft gear .............................................................................. 13

Hook timing .....................................................................................................................................................14

Adjustment of needle bar height..................................................................................................................... 15

Clearance between needle and tip of the rotary hook (1) .............................................................................. 16

Clearance between needle and tip of the rotary hook (2) ...............................................................................17

Adjustment of height and direction of presser bar.......................................................................................... 18

To adjust the feed dog height ......................................................................................................................... 19

To replace needle thread tension unit ............................................................................................................ 20

To adjust the upper thread tension release (1) ............................................................................................... 21

To adjust the upper thread tension release (2) ............................................................................................... 22

Adjusting the needle thread tension ............................................................................................................... 23

To adjust the bobbin winder stopper .............................................................................................................. 24

Needle threader hook position ....................................................................................................................... 25

To adjust thread cutter switch ......................................................................................................................... 26

To adjust thread drawing lever ....................................................................................................................... 27

Replacing the thread take-up lever ............................................................................................................... 28

To attach lower shaft. ..................................................................................................................................... 29

Synchro belt ................................................................................................................................................... 30

To replace driving motor and adjust belt tension ............................................................................................ 31

Upper shaft shield plate position .................................................................................................................... 32

Adjusting buttonhole lever position ................................................................................................................ 33

Stretch stitch feed balance ............................................................................................................................. 34

Adjustment of presser bar lifter switch position .............................................................................................. 35

To adjust and replace needle plate sensor switch ......................................................................................... 36

To replace switching power supply................................................................................................................. 37

To replace and adjust drop feed micro switch ................................................................................................ 38

Feed dog troubleshooting .............................................................................................................................. 39

Self diagnosis ............................................................................................................................................40-44