5 - 1
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
Summary of Contents for BLMY
Page 1: ......
Page 2: ......
Page 3: ......
Page 19: ...1 8 ...
Page 21: ...2 2 Main parts location diagram Main unit ...
Page 30: ...2 11 Disassembly Electrical parts and motors location diagram Main unit ...
Page 37: ...2 18 Thread tension mechanism location diagram Main unit ...
Page 43: ...2 24 Bobbin winder mechanism location diagram Main unit ...
Page 49: ...2 30 Needle bar presser mechanism Upper shaft mechanism location diagram Main unit ...
Page 53: ...2 34 Needle presser module breakout diagram 78 Modules ...
Page 66: ...2 47 Disassembly Feed and bobbin module breakout diagram Modules ...
Page 75: ...2 56 Thread cutter module breakout diagram Modules ...
Page 79: ...2 60 ...
Page 81: ...3 2 Needle bar presser mechanism upper shaft mechanism location diagram Main unit ...
Page 90: ...3 11 Assembly Bobbin winder mechanism location diagram Main unit ...
Page 94: ...3 15 Assembly Thread tension mechanism location diagram Main unit ...
Page 102: ...3 23 Assembly Electrical parts and motors location diagram Main unit ...
Page 109: ...3 30 Main parts location diagram Main unit ...
Page 120: ...3 41 Assembly Needle presser module breakout diagram 78 Modules ...
Page 139: ...3 60 Feed module breakout diagram Modules ...
Page 155: ...3 76 Thread cutter module breakout diagram Modules ...
Page 161: ...3 82 ...
Page 191: ...4 30 ...
Page 226: ......