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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; Operation Panel Display Freezes And Operation Is Not Possible - Brother HE-800B Service Manual

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11. TROUBLESHOOTING

11-27. Needle does not zigzag or noise occurs when needle zigzags

Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Stopper

11-28. Sewing machine stops during sewing

Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Thread breakage
detector
Threading
Error [E301]

11-29. Upper shaft does not rotate as far as the needle up stop position

Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Thread retainer and
rotary hook are
touching.

11-30. Operation panel display freezes and operation is not possible

Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Poor
connection
inside control box.
167
Check
Stopper position
Check
Thread breakage detector
position
Upper thread threading
Upper
thread
trimmer
operation
Uneven stitches
Check
Thread
trimmer
mechanism position
Check
P.C. board cord connections
Remedy
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.
Pass the thread correctly through the thread guide.
Move the work clamp up and down and check that it
moves smoothly.
Adjust to obtain the optimum stitches.
Remedy
1.
Turn the machine pulley backward to set the
needle bar to the needle up position.
2.
Push the thread driving arm in the direction of the
arrow to set the thread trimming mechanism to the
home position.
Remedy
・ Check if there are any problems with the
connection and contacts of connector P5 on the
main P.C. board.
・ Check if there are any problems with the
connection and contacts of connector P2 and
operation panel connector P3 on the motor P.C.
board.
HE-800B
INSTRUCTION
MANUAL CD
INSTRUCTION
MANUAL CD
Thread driving arm
4109M
INSTRUCTION
MANUAL CD
Page
75
Page
107
21
Page
Page

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Troubleshooting

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