Janome 990D - User Manual

SERVICE MANUAL
&
PARTS LIST
990D

Janome 990D Specifications

General

Type	Overlock
Number of Threads	3 or 4
Stitch Length	1.0 - 4.0 mm
Differential Feed	Yes
LCD Screen	No
Presser Feet	Standard Overlock Foot
Built-in Memory	No
Stitch Types	Rolled Hem
Maximum Sewing Speed	1300 stitches per minute
Weight	15.4 lbs (7 kg)
Dimensions	15.7 x 11.8 x 12.6 inches (40 x 30 x 32 cm)

Summary

To Change the Face Plate Unit

To Change the Belt Cover Unit

To Change the Top Cover

To Change the Front Cover Unit

To Change the Side Cover Unit

To Change the Machine Base Unit

To Change the Machine Socket

Preparation Before the Adjustment

To Adjust the Needle Height

To Adjust the Presser Bar Height

To Adjust the Feed Dog Height

To Adjust the Timing of the Needle and the Feed Dog

To Adjust the Timing of the Needle and the Upper Knife

To Adjust the Height of the Lower Looper

To Adjust the Clearance Between the Needles and the Lower Looper;Needle Guards

To Adjust the Clearance Between the Needles and the Fixed Needle Guard

To Adjust the Position of the Chaining Finger

To Adjust the Position of the Upper Looper

To Adjust the Timing of the Needle and the Lower Looper

To Adjust the Timing of the Upper and Lower Loopers

To Adjust the Clearance Between the Loopers

To Adjust the Clearance Between the Needles and the Upper Looper

To Adjust the Position of the Knives

To Adjust the Position of the Lower Looper Thread Guide

To Adjust the Stitch Length

To Adjust the Thread Tension Dials