The "Bobbin Winding" Message Continues To Appear On The Lcd; The "Bobbin Winding" Message Does Not Appear On The Lcd; When The Machine Is Set For Bobbin Winding.(1 Line Lcd); Message "Bobbin Winding Selected" Does Not Appear - Brother BL6200 Service Manual

PROBLEM
21. The "Bobbin
Winding" message
continues to appear
on the LCD.
22. The "Bobbin
Winding" message
does not appear on
the LCD when the
machine is set for
bobbin winding.
(1 line LCD).
23. Message "Bobbin
Winding Selected"
does not appear
when bobbin
winding is set.
(4 line LCD)
24. Message "Lower
BH Lever" does
not appear when
buttonhole is set
and buttonhole
lever is not
lowered. (1 line
LCD)
25. Message "Lower
Buttonhole Lever"
does not appear
when buttonhole is
set and buttonhole
lever is not
lowered.
(4 line LCD)
CAUSE
1 line LCD
1. BW switch does not work.
2. Inferior BW switch.
3. Inferior LCD unit.
4 line LCD
1. BW switch does not work.
2. Inferior BW switch.
3. Inferior LCD control PCB.
1. Disconnection of connector CN1 on
LCD unit.
2. Disconnection of connector CN5 on
Motor control unit.
3. BW switch does not work.
4. Inferior BW switch.
5. Inferior LCD unit.
1. Disconnection of connector P1 on LCD
control PCB.
2. Disconnection of connector CN5 on
Motor control unit.
3. BW switch does not work.
4. Inferior BW switch.
5. Inferior LCD control PCB.
1. Disconnection of connector CN3 on
LCD unit.
2. Disconnection of connector CN7 on
Motor control unit.
3. BH lever switch does not work.
4. Inferior BH lever switch.
5. Inferior LCD unit.
1. Disconnection of connector P2 on LCD
control PCB.
2. Disconnection of connector CN7 on
Motor control unit.
3. BH lever switch does not work.
4. Inferior BH lever switch.
5. Inferior LCD control PCB.
Adjust the BW stitch.
*Refer to P.51.
Replace the BW switch.
*Refer to P.51.
Replace the LCD unit.
Adjust the BW stitch.
*Refer to P.51.
Replace the BW switch.
*Refer to P.51.
Replace the LCD control PCB.
Connect CN1 on LCD unit.
Connect CN5 on Motor control unit
Adjust the BW stitch.
*Refer to P.51.
Replace the BW switch.
*Refer to P.51.
Replace the LCD unit.
Connect the P1 on LCD control PCB.
Connect the CN5 on Motor control unit.
Adjust the BW switch.
*Refer to P.51.
Replace the BW switch.
*Refer to P.51.
Replace the LCD control PCB.
Connect the CN3 on LCD unit.
Connect the CN7 on Motor control unit.
Adjust the BH lever switch.
*Refer to P.49.
Replace the BH lever switch.
*Refer to P.49.
Replace the LCD unit.
Connect the P2 on LCD control PCB.
Connect the CN7 on Motor control unit.
Adjust the BH lever switch.
*Refer to P.49.
Replace the BH lever switch.
*Refer to P.49.
Replace the LCD control PCB.
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CORRECTION
1 line LCD
4 line LCD