Button Hole Cannot Be Sewn Correctly - Brother CE-5500PRW Service Manual

Failure Investigation
for Electronic Parts
Is the resistance between pin 4
and 5 on the BH lever switch
connector normal?
• BH lever down : 1Ω or less
• BH lever up : more than 1MΩ
When the BH lever is lowered, is the resistance
between pin 1 and 2, 2 and 3 on the BH switch
connector normal?
• BH lever pulled forward
• BH lever pushed back
5 - 14

Button hole cannot be sewn correctly

Button hole cannot be sewn correctly.
Is the appropriate presser foot
being used?
Y
Y
Pin 1 and 2 : 1Ω or less, pin 2 and 3 : more than 1MΩ
Pin 1 and 2 : more than 1MΩ, pin 2 and 3 : 1Ω or less
Y
Replace the main PCB assy.
N
Attach the appropriate
presser foot.
Adjust the BH lever.
N
or
Replace the BH switch assy.
Adjust the BH lever.
N
or
Replace the BH switch assy.