Failure Investigation For Electronic Parts - Baby Lock BLMY Service Manual

5
Failure Investigation
for Electronic Parts
* Perform resistance measurements after turning off the power, and detaching the
connectors to be measured from the PCB.
Error message list ............................................................ 5 - 2
Power does not come on.................................................. 5 - 3
Pulse motors do not return to starting point ..................... 5 - 4
Pattern cannot be selected............................................... 5 - 5
Main motor does not turn ................................................. 5 - 6
Main motor rotation abnormal .......................................... 5 - 8
Cannot sew pattern well ................................................... 5 - 9
Cannot sew button holes well......................................... 5 - 10
Stitch length and zigzag width cannot be done by manual adjustment . 5 - 11
Problems with vertical needle movement and reverse stitching.. 5 - 12
Does not operate when the foot controller is used ......... 5 - 13
Thread tensioning does not go well................................ 5 - 14
Thread cutter does not work normally ............................ 5 - 15
LCD display is not normal .............................................. 5 - 16
LCD light does not come on ........................................... 5 - 17
Bobbin winding cannot be done ..................................... 5 - 18
The lamp at hand does not have light ............................ 5 - 19
Error is displayed............................................................ 5 - 20
5 - 1