Needle Does Not Zigzag Or Noise Occurs When Needle Zigzags; Sewing Machine Stops During Sewing; Upper Shaft Does Not Rotate As Far As The Needle Up Stop Position - Brother HE-800A Instruction Manual

16. TROUBLESHOOTING
Cause
Feed home position
sensor
Feed timing belt
１６-２７. Needle does not zigzag or noise occurs when needle zigzags
Cause
Zigzag home position
sensor
Stopper
１６-２８. Sewing machine stops during sewing
Cause
Thread breakage
detector
Pauses
Threading
Error [E-07]
１６-２９. Upper shaft does not rotate as far as the needle up stop position
Cause
Thread retainer and
rotary hook are
touching.
109
Check
Feed home position
sensor position
Feed timing belt tension
Check
Zigzag home position
sensor position
Stopper position
Check
Thread breakage detector
position
Panel DIP switch A - No.
3
Upper thread threading
Upper thread scissors
operation
Check
Thread trimmer
mechanism position
Remedy
Adjust the feed home position sensor position.
Adjust the feed timing belt.
Remedy
Adjust the zigzag home position sensor position.
Adjust the stopper position.
Remedy
Adjust the thread breakage detector position.
* If the detector is not adjusted, sewing may stop
even when the thread is not broken.
When panel DIP switch A - No. 3 is set to ON,
sewing will pause when the treadle is depressed
backward.
* If the treadle is depressed very firmly and then
released, the pedal may depress backward and
cause sewing to be paused.
Pass the thread correctly through the thread guide.
Apply grease to the inclined face of the opening
cam.
Remedy
Turn the machine pulley backward to set the
needle bar to the needle up position.
Push the thread driving arm in the direction of the
arrow to set the thread trimming mechanism to
the home position.
HE-800A
Page
Page
Page
Page
Thread driving arm
4026Q
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