Brother RH-9820 Service Manual page 233

Optional device-related errors
Code
Sub-hammer is not set even though
straight buttonhole program is being
E940
sewn. (Straight
sensor is not responding.)
Sub-hammer is not retracted even though
eyelet buttonhole program is being sewn.
E941
(Eyelet buttonhole position sensor is not
responding.)
Sewing machine is trying to sew an eyelet
buttonhole while there is no material
under the straight buttonhole sensor.
E942
Sewing machine is trying to sew a straight
buttonhole while there is material under
the straight buttonhole sensor.
No response from feed plate home
E950 position sensor while feed plate is being
driven.
No response from feed plate left sensor
E951
while feed plate is being driven.
No response from feed plate right sensor
E952
while feed plate is being driven.
5
* ：Refer to the instruction manuals for the corresponding devices.
If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the
place of purchase.
Cause
buttonhole position
Remedy
Turn off the power, and then check that connector P12
and connector P24 on the main P.C. board are properly
connected.
Turn off the power, and then check that connector P12
and connector P24 on the main P.C. board are properly
connected.
Press the RESET key.
Turn off the power, and then check that connector P23
and connector P25 on the main P.C. board are properly
connected.
Turn off the power, and then check that connector P23
and connector P25 on the main P.C. board are properly
connected.
Turn off the power, and then check that connector P23
and connector P25 on the main P.C. board are properly
connected.
RH-9820
9. ERROR CODES
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