Brother S-710A - Page 152

22. TROUBLESHOOTING
SL-710A
145
Error code Possible cause Page
U
• Is the synchronizer connector inside
the control box disconnected?
Insert the connector securely.
• Problem with synchronizer.
Replace the motor.
80
34
UE
• Is detector pin (1) of the bobbin
thread detector not retracted
correctly?
Retract the detector pin (1).
Use an Allen key to move the
slider (2), and check that the
detector pin (1) moves correctly.
• Problem with lower thread detector.
Replace the lower thread detector.
Instruction manual
Instruction manual
Uo
• Is the lower thread detector
connector inside the control box
disconnected?
Insert the connector securely.
• Is there an open circuit in the
lower thread detector connecting
cord inside the machine head?
Replace the lower thread detector
or the connecting cord.
80
-
0992M
0984M
0982M
1929M
0985M
0993M
0994M
(
1
)
(
2
)