Top Cover Removal
(pages 2 and 3, HQ Stitch Technical Bulletin #0001)
Machine Base Plate and Base Cover Removal Bed Cover Removal
Belt Cover Removal
Front Panel Removal
Free Arm Cover Removal
Lubrication
Feed Dog Height
Presser Bar Height and Radial Angle
Needle Position (Front-to-Back)
Needle Position (Left-to-Right)
Needle-to-Feed Timing Theory , Check and Adjustment
Needle Bar Height
Needle-to-Hook Clearance
Hook Gear Backlash
Needle-to-Hook Timing
Needle Threader Plate
Upper Feed Dog Timing (Part 1)
Upper Feed Dog Timing (Part 2)
Needle Plate Micro switch
Thread Tension Unit Adjustments
Automatic Thread Cutter Removal, Adjustments, and Installation
Stretch Stitch Feed Balance
Parts of the Front Panel
Printed Circuit Board ‘A’ Removal
Printed ‘A’ Circuit Board Diagram
Touch Panel Replacement
DC Motor Removal and Installation
Switching Power Supply Removal and Installation
Free Arm Cover Installation
Front Panel Installation
Bed Cover Installation
Belt Cover Installation
Machine Base Plate and Base Cover Installation
Top Cover Installation
Touch Screen Calibration
1-
4
5
6
7
8
-
10
11
-1
2
1
3
-2
8
2
9
-
31
3
2
33
3
4
3
5
and 3
6
-
37
3
8
-3
9
40
-
41
4
2
4
3
-4
4
4
5
4
6
-4
8
4
9
50
51
5
2
-5
5
5
6
-5
7
5
8
5
9
60
61
-6
2
6
3
6
4
-6
5
6
6
6
7
-6
8
6
9
70
71
7
2
7
3
-7
4
Table of Contents
