Brother BAS-311E service manual Chapter, switch is, occurs

Chapter 7

Error status		Probable causes	Check/repair/adjust	Parts to be replaced
	1. Pulse motor has been out of		• If the work clamp or material to be sewn is
		control because of insufficient	sluggish, set DIP switch B-8 to off and set the feed
		torque. (The feed mechanism	speed to low.
#8		does not move as programmed.)
The work
clamp does	2.	Mechanical adjustment is not	• Turn the power off and then on again. Move the
not move		sufficient.	feed mechanism manually to check that it can
to the			easily move around the sewing area.
sewing
start
position.
	3.	Pulse motor defective.	• Refer to #7-4	Pulse motor
	4. The control circuit board is			Control circuit
		defective.		board.
#9	1. Panel circuit board is defective.		• Refer to #1 and #2 (panel switch).	Panel circuit board
The TEST
lamp is not
lit when
the TEST
switch is
pressed.
#10			• Refer to #6, #7, and #8
No feeding
operation
occurs
during the
test.
#11	1. Foot switch and cord defective		• Refer to #4-1
Rapid feed
can not be
performed
during the
test.
#12			• Refer to #8
The
machine
does not
operate as
programm
ed during
the test.
#13	1.	Cord is defective.	• Check that connector P3 (DC18) on the power PCB	Power supply
The			and connector P16 (DC18) on the control circuit	harness H-P
machine			board are securely inserted.
does not			• Check that connector P5 (DC300) on the power	Motor power cord.
operate for			PCB and connector P15 (DC300) on the control
sewing and			circuit bard are securely inserted.
error [E.20]			• Check that connector P14 (UVW) on the control
appears.			circuit board is securely inserted and there is no
			looseness of the machine motor.

BAS-311E.311EL.326E.326EL 109