Table Of Contents - ELNA 7100 Servicing Manual

Table of Contents

Replacing the External Parts
Face plate ..................................................................................................... 1
Top Cover ...................................................................................................... 1
Belt Cover ..................................................................................................... 1
Motor Cover .................................................................................................. 1
Base .............................................................................................................. 1
Mechanical Adjustment
Needle Bar Height ......................................................................................... 2
Presser Bar Height ........................................................................................ 2
Feed Dog Height ........................................................................................... 3
Feed Dog Alignment ...................................................................................... 3
Feed Cam Timing .......................................................................................... 4
Feed Lifting Cam Timing ............................................................................... 5
Needle to Hook Timing .................................................................................. 6
Clearance between Needle and Hook Point ................................................. 6
Hook Stopper Position .................................................................................. 7
Bobbin Winder Stopper ................................................................................. 8
Check Spring Stroke ..................................................................................... 9
Pre-tension Dial ............................................................................................. 9
Knee Lifter Lever ......................................................................................... 10
Needle Stop Position ................................................................................... 11
Needle Threader ......................................................................................... 12
Replacing the Electronic Components
Location of the Electronic Components ...................................................... 13
Location of the Connectors ......................................................................... 14
Internal Wiring ............................................................................................. 15
Circuit Board-A ............................................................................................ 16
Circuit Board-F and Slide Volume ............................................................... 16
Driving Motor ......................................................................................... 17-18
Power Transformer ...................................................................................... 19
Machine Socket ........................................................................................... 19
Light Bulb .................................................................................................... 20
Adjustment of the Thread Cutter Mechanism
Static Cutter Blade ...................................................................................... 21
Thread Cutter Blade .................................................................................... 22
Thread Guide Plate ..................................................................................... 23
Needle to Cutter Cam Timing ...................................................................... 24
Thread Drawing Lever ................................................................................. 25
Auto Tension Release ................................................................................. 26
Thread Cutter Troubleshooting .................................................................... 27
Parts List
.................................................................................................. 28