Troubleshooting - Brother BAS-341H Instruction Manual

9. TROUBLESHOOTING

9. TROUBLESHOOTING
・ Please check the following points before calling for repairs or service.
・ If the following remedies do not fix the problem, turn off the power and consult a qualified technician or the place of
purchase.
Turn off the power switch and disconnect the power cord before carrying out these operations.
The machine may operate if the foot switch is depressed by mistake, which could result in injury.
Items with a "*" in the "Reference" column should only be checked by a qualified technician.
Problem
Sewing machine does
not start when the
power is turned on and
the foot switch is
depressed.
Work clamp does not
work.
Thread wiper does not
work.
Work clamp does not
rise to the maximum
height.
Work clamp pressure is
too weak.
Work clamp pressure is
not uniform at front and
back of work clamp.
Thread wiper does not
operate correctly.
(*1) Refer to the "LCD Panel/Operation Panel" Instruction Manual.
57
Cause
Machine head switch does not work.
Air cock is closed.
Air pressure is too weak.
Speed controller has been tightened
too far.
Thread wiper setting is OFF.
Work clamp lifter lever position is
incorrect.
Air pressure is too weak.
Work clamp is tilted.
The thread wiper is obstructing the
needle.
Thread wiper position is incorrect.
BAS-341H, BAS-342H
CAUTION
Check if the machine head switch cord
is disconnected.
Adjust the position of the machine head
switch.
If the machine head switch is
malfunctioning, replace it with a new
one.
Open the air cock.
Adjust the regulator so that the air
pressure is about 0.5 MPa.
Adjust the speed controller by
loosening it 4 turns from the
fully-tightened position.
Set the thread wiper setting to ON.
Adjust the position of the work clamp
lifter lever.
Adjust the regulator so that the air
pressure is about 0.5 MPa.
Adjust the tilt of the work clamp.
Adjust the height of the thread wiper.
Adjust the operating stroke of the
thread wiper.
Adjust the operating stroke of the
thread wiper.
Remedy
(Continued on next page)
Reference
P. 12
P. 22
P. 10
P. 47
P. 48
(*1)
P. 47
P. 47
*
P. 44
P. 44
P. 44