HE-800C
11. TROUBLESHOOTING
97
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 Check Remedy Page
Stopper Stopper position Adjust the stopper position. *
11-28. Sewing machine stops during sewing
Items with a “*” in the “Page” column should only be handled by a qualified technician.
Cause Check Remedy Page
Thread breakage
detector
Thread breakage detector
position
Adjust the thread breakage detector position.
* If the detector is not adjusted, sewing may stop even
when the thread is not broken.
*
Threading Upper thread threading Pass the thread correctly through the thread guide. 22
Error [E301] Upper thread trimmer
operation
Move the work clamp up and down and check that it
moves smoothly.
*
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 Check Remedy
Page
Thread retainer and
rotary hook are
touching.
Thread trimmer mechanism
position
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.
*
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 Check Remedy
Page
Poor connection
inside control box.
P.C. board cord connections
・ 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.
75*
10, 75*
4109M
Thread driving arm
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