Brother NV4000D Service Manual page 327

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
The power does not come on........................................... 5 - 3
Pulse motors do not return to starting point ..................... 5 - 5
The touch panel does not work ........................................ 5 - 7
Main motor does not turn ................................................. 5 - 8
Main motor rotation abnormal ........................................ 5 - 10
Cannot sew pattern well ................................................. 5 - 11
Cannot sew button holes well......................................... 5 - 12
Stitch length and zigzag width cannot be done by manual adjustment ... 5 - 13
Problems with vertical needle movement and reverse stitching.... 5 - 14
Does not operate when the foot controller is used ......... 5 - 15
Needle bar cutting and separating does not occur normally.... 5 - 16
Thread tensioning does not go well................................ 5 - 17
Thread cutter does not work normally ............................ 5 - 19
Bobbin winding cannot be done ..................................... 5 - 20
The lamp at hand does not have light ............................ 5 - 21
Bobbin thread detection does not work normally ........... 5 - 23
Upper thread sensor does not work normally................. 5 - 24
Automatic needle threader does not work correctly ....... 5 - 25
The presser foot lifter does not work correctly ............... 5 - 27
Card cannot be used normally ....................................... 5 - 30
Universal serial bus (USB) cannot be used normally ..... 5 - 31
The hoop sensor does not function normally ................. 5 - 32
Embroidery unit does not operate normally.................... 5 - 33
Unable to detect frame ................................................... 5 - 36
Error is displayed............................................................ 5 - 38
5 - 1