Janome QMP16SU User Manual

QMP16SU Service Manual | 1
Contents
About the Janome QMP16SU .............................................................................................................2
About This Manual ..................................................................................................................................... 2
Service Manual Guidelines..................................................................................................................... 2
1. General Specicaons ....................................................................................................................4
 ................................................................................................................. 5
3. Preparing to Service ........................................................................................................................ 6
.............................................................................................. 6
Remove the Front Cover, Control board, and Power Supply .................................................................. 7
 .......................................................................................... 9
 .................................................................................................................. 10

QMP16Su Cables...................................................................................................................................12
4. Lubricaon ................................................................................................................................... 16
5. General Checks and Adjustments .................................................................................................. 19
Thread Mast ......................................................................................................................................... 20
Hand Wheel ......................................................................................................................................... 20
Thread Guides ...................................................................................................................................... 20
Top Tension Assembly .......................................................................................................................... 21
Check and Secure Flats and Screws..................................................................................................... 24

Check and Adjust Axial Play ................................................................................................................. 27
Check the Base-Plate Wheels............................................................................................................... 29
 .............................................................................................. 30
 ................................................................................................... 32
 ......................................................................33
 ............................................................................................. 34
6. Timing Adjustments ...................................................................................................................... 36

 .......................................................................................... 39
 ................................................................................................................ 44
 ....................................................................................................................... 46
 .................................................................................. 47
7. Machine Electronics ...................................................................................................................... 50

 ..........................................................................51
Fuse and Power Supply ........................................................................................................................ 52
 ..................................................................................................................... 53
 ................................................................................................................................. 54
 ........................................................................................................................ 55
 ............................................................................................................. 56
 .................................................................................................................. 57
 .......................................................................................................................... 58
Electrical Notes Janome QMP16SU ..................................................................................................... 59
8. Janome QMP16SU Screens ...................................................................................................... .62
............................................................................................................................................63

Janome QMP16SU Specifications

General

Brand	Janome
Model	QMP16SU
Category	Sewing Machine
Language	English

Summary

Preparing to Service

Electrostatic Discharge (ESD) Precaution

Details precautions to prevent damage from static electricity when servicing electronics.

Wiring and Component Connections

General Checks and Adjustments

Thread Tension and Feed Adjustments

Mechanical Timing and Alignment

Needle Position Adjustment

Critical adjustments for the X and Y axis positioning of the needle.

Timing Adjustments

Visual Timing Check

Loop Lift and Needle Distance Adjustment

Adjusts hook point radial position (loop lift) and axial distance (needle distance).

Needle Height Adjustment

Steps to set the correct vertical position of the needle bar using standard and specialized tools.

Stop-Finger Adjustment

Machine Electronics

Speed and Needle Position Sensors

Explains the function and troubleshooting of speed/needle position sensors.

Power Supply and Fuse Checks

Discusses fuse information and troubleshooting power supply issues.

Janome QMP16SU Screens

System Diagnostics and Tests

Introduces diagnostic tests for sensors, keypad, and motor.

Machine Calibration (Burn-in)