Brother RH-9820 Service Manual page 214

8. ELECTRICAL MECHANISM
Other
• DC fan motor does not operate.
• [E740] is displayed.
• Operation panel display is incorrect.
• Power indicator does not illuminate.
• Operation panel keys do not work.
• Backlight does not illuminate.
• Sewing machine does not start when foot switch is
depressed.
[Treadle]
Work clamp drops when depressed to the 1st step
Sewing machine starts when depressed to the 2nd step
[2 pedal]
Work clamp drops when work clamp switch (left) is depressed
Sewing machine starts when start switch (right) is depressed
• After the power is turned on, [E055] is displayed.
• After the power is turned on, [E450] is displayed.
205
Trouble symptom Connector No. and position
RH-9820
0758B
0759B
5247Q
5248Q
5249Q