Janome QMP16SU - Indications of Speed;Needle Position Sensor Failure

QMP16SU Service Manual | 51
Indicaons of Speed/Needle Posion Sensor Failure
1. Needle
Sense Failure.
 NOTE: First check the hand wheel to

occur when the hand wheel cannot turn;

thread lock. Remove the thread lock and


 
cable is properly connected to the


a. With the control board accessible and all







b. 
properly, determine whether the

dirty, and make sure the sensor board is

c. 

Control Board mounted to the inside of front
cover
Needle/Speed Sensor Board