Brother NS-10 - Cannot sew button holes well

5 - 10
Failure Investigation for Electronic Parts Cannot sew button holes well
Cannot sew button holes well
With the BH lever down, are the
resistance values between the BH
switch connector pins 1 & 2 and pins
2 & 3 normal?
• BH lever pulled forward
Pins 1 – 2…1 Ω or less, pins 2 – 3…∞
• BH lever pushed back
Pins 1 – 2…∞, pins 2 – 3…1 Ω or less
Is the resistance between the BH lever
switch connector pins 4 & 5 normal?
• BH lever down …… 1Ω or less
• BH lever up ………. ∞
Change to correct presser
N
Replace the main PCB assy.
Y
Y
Is the correct presser being used?
N
N
Y
Adjust the BH lever
or
Replace the BH switch assy.
Adjust the BH lever
or
Replace the BH switch assy.