The Machine Stops Immediately After Bobbin Winding Is Started; The Machine Does Not Operate When The Foot Controller Is Depressed - Brother BL6200 Service Manual

PROBLEM
34. The machine stops
immediately after
bobbin winding is
started.
35. The machine does
not operate when
the foot controller
is de pressed.
CAUSE
1. If the machine stops approx. 1 second
after bob-bin winding starts, the BW
switch is not operating correctly.*
The resistance between pins 1 and 2 of
connector CN5 (black) should be less
than 1 Ω when the BW switch is turned
on and ∞ when the BW switch is
turned off.
2. Other causes.
1. The foot controller is not operating
properly.
The resistance between the two ends of
the foot controller plug is not less than
10 KΩ.*
2. The resistance between pins 2 and 3 of
the pin jack assembly on the PCB
(F.C.) should be less than 1 Ω when the
foot controller is plugged in and ∞
when it is not plugged in.*
3. Other causes.
* Be sure to turn off the power and remove from the PCB the connector.
Replace the BW switch.
*Refer to P.51.
Replace the motor control unit.
Replace the foot controller.
Replace the motor control unit.
Replace the motor control unit.
- 20 -
CORRECTION