Brother BAS-311E Service Manual page 117

Error status Probable causes
1. Pulse motor has been out of
control because of insufficient
torque. (The feed mechanism
does not move as programmed.)
#8
The work
clamp does
2. Mechanical adjustment is not
not move
sufficient.
to the
sewing
start
position.
3. Pulse motor defective.
4. The control circuit board is
defective.
1. Panel circuit board is defective.
#9
The TEST
lamp is not
lit when
the TEST
switch is
pressed.
#10
No feeding
operation
occurs
during the
test.
1. Foot switch and cord defective
#11
Rapid feed
can not be
performed
during the
test.
#12
The
machine
does not
operate as
programm
ed during
the test.
1. Cord is defective.
#13
The
machine
does not
operate for
sewing and
error [E.20]
appears.
Check/repair/adjust
• If the work clamp or material to be sewn is
sluggish, set DIP switch B-8 to off and set the feed
speed to low.
• Turn the power off and then on again. Move the
feed mechanism manually to check that it can
easily move around the sewing area.
• Refer to #7-4
• Refer to #1 and #2 (panel switch).
• Refer to #6, #7, and #8
• Refer to #4-1
• Refer to #8
• Check that connector P3 (DC18) on the power PCB
and connector P16 (DC18) on the control circuit
board are securely inserted.
• Check that connector P5 (DC300) on the power
PCB and connector P15 (DC300) on the control
circuit bard are securely inserted.
• Check that connector P14 (UVW) on the control
circuit board is securely inserted and there is no
looseness of the machine motor.
BAS-311E.311EL.326E.326EL
Chapter 7
Parts to be replaced
Pulse motor
Control circuit
board.
Panel circuit board
Power supply
harness H-P
Motor power cord.
109