Brother S-710A Service Manual page 87

Connectors (5)
(8)
(10)
(11)
(12)
(4)
(3)
(1)
(23)
(14)
(20)
(9)
(15)
(22)
Fuses (13)
(19)
Terminal board (17)
DIP switch (18)
Control dials (2)
(21)
LED indicators (6)
(7)
*1: When using the automatic presser lifter, set DIP switch 2 to ON. If the sewing machine is used while DIP switch 2 is
set to OFF, the sewing machine may start operating before the presser foot is lowered. (Refer to page 81.)
*2: This is adjusted at the time of shipment from the factory, and should generally not be touched. However, it should be
adjusted when either the control circuit board (16) or treadle unit (24) is replaced. (Refer to page 92.)
*3: This is set to the right-most position at the time of shipment from the factory. The flickering is reduced if turned to the
left, but the sewing machine operation will become slower.
In addition, the maximum speed may become lower.
Name
Operation panel connector
Synchronizer connector
Lower thread detector connector
Sewing machine connector
Solenoid-type presser lifter connector
Coupler connector
Relay connector
Treadle connector
Standing operation connector
Control power supply connector
Illumination lamp connector
Puller connector
Output power supply connector
Bobbin changer connector
Solenoid power supply fuse (8 A)
Illumination lamp power supply
fuse (5 A)
Terminal board
DSW
PVR
FVR
Red LED
Green LED
Connect to sewing machine connectors.
Connect to power supply circuit board connectors.
Connect to treadle unit connector.
(Already connected for some specifications.)
Connect to transformer connectors.
For optional devices.
For preventing overcurrent
For illumination lamp (6 V)
8-element DIP switch (*1)
Coordinates the treadle unit (24) and control circuit
board (16). (*2)
Use to adjust the fluorescent tube and lamp if they
are flickering when the sewing machine starts. (*3)
Indicates power supply circuit board problems.
Indicates that the power is on.
SL-710A
11. CONTROL CIRCUIT BOARD
Function
80