Changing light bulb – SINGER W1777 User Manual
Page 49
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PROBLEM
PROBABLE CAUSE
CORRECTION
The material
puckers
Upper or lower thread tension too tight
Stitch too long for material
P.12, P.20
P.18
Thread too thick
P.16
Incorrect threading of upper or lower thread
P.13, P.11
Breaking needle
Needle not correctly inserted
P. 6
Needle bent
P. 6
Needle clamp screw too loose
P. 6
Upper thread tension too tight
P.20
Needle too fine for the material
P.16
Dials have been changed while the needle
was down in the material
P.18, P.22
Zigzag width set more than 2.5 while twin
needle was attached
P.14
trouble !S still apparent in the machine, please consult your nearest dealer.
0 not try to correct fault by yourself.
Changing Light Bulb
Unplug the machine.
Open face cover as shown.
Remove bulb by unscrewing it
in counterclockwise.
Install a new bulb by screwing it
in clockwise.