Brother HE-800A ￿￿-￿￿.Feed mechanism does not operate or motor is out of step, ￿￿-￿￿.Lower thread is not trimmed (pulls when material is removed)

￿										16. TROUBLESHOOTING
￿
Cause			Check					Remedy			Page
Upper	thread	Upper	thread	scissors	Adjust	the	upper	thread	scissors to the standard		76
scissors		operation			setting.
Work clamp	home	Work	clamp	home	Adjust	the	work	clamp	home	position sensor	-
position sensor		position sensor position			position.

￿￿-￿￿. Lower thread is not trimmed (pulls when material is removed)

Cause			Check		Remedy	Page
Machine	stopping	Rotary	hook	touches	Adjust the needle up stop position.
position		lower	thread retainer at		Retainer
		the stop position			Inner rotary
					hook presser	77
						4021Q
Fixed knife set		Fixed	knife and	movable	Adjust the fixed knife set installation position.
		knife do not mesh.			Fixed knife

Movable knife

-

					4024Q
		Knife	tip is	bent or	Repair or replace the knife.	-
		chipped.
￿￿-￿￿. Feed mechanism does not operate or motor is out of step
Cause			Check		Remedy	Page
Feed pulse motor		Cord connection			Check the cord connections and contacts.	-
Upper	thread	Upper	thread	scissors	Remove and re-install the upper thread scissors.
scissors		position

-

	Projection on scissors M is inserted.
	* Always make sure that the upper
	thread scissors are in the correct
	position before use.	4108M
Check if the cam opens	Adjust the cam position.
the stop plate.	* If the feed mechanism operates when the cam has
	not opened the stop plate, the cutter will bump
	against the upper thread scissors.

76

4018Q

HE-800A 108