Singer 9920 - Starting to Sew; Start and End of Seam

SERVICE MANUAL
32
Checking Starting point of Z and F pulse
motors
1. When self-diagnositic program is running;
• By pressing the button (a), Z pulse motor will move to
starting point.
• By pressing the button (b), F pulse motor will move to
starting point.
9920
9940
9910
a
b
a
b
a
b
1
Z
F
Checking LED Light
1. When self-diagnositic program is running;
• By pressing the button (c) once, LED (d) will turn on.
• By pressing the button (c) again, LED (e) will turn on.
• By pressing the button (c) once more, LED will turn
off.
9940
5
9920
9910
1
1
1
d
e
d
e
d
e
c
cc