Brother BAS-326F-0, BAS-311F-L, BAS-311F-0 instruction manual Head position switch cord connection

14. TROUBLESHOOTING

Problem

Cause Check Remedy Page

Unstable upper thread length

Unstable needle up stop position

Machine does not operated when power is turned on and foot switch is depressed.

Improper tension and height of thread take-up spring

Improper adjustment of sub tension

Needle up stop position fluctuates.

Fixed knife is blunt.

Electrical trouble

Head position switch does not work.

Thread take-up spring tension and height

sub tension

See “Unstable needle up stop position”.

Fixed knife blade

Refer to the details for [E.22] in the error code table.

Head position switch cord connection.

Switching plate position.

Head position switch is broken.

Adjust the tension and	25
height of the thread take-
up spring.
Adjust the sub tension.

Sharpen or replace the fixed knife.

63

Check if the cord is 11 13 disconnected.

Adjust the position of the	7
switching plate.

Replace the head position switch.

BAS-311F-0, 311F-L, 326F-0 71