Brother PC6000 Service Manual page 31

IV. HOW TO ADJUST ELECTRONIC ELEMENTS
1. When power is turned on, buzzer does not sound and nothing
appears on display ...............................................................................................30
2. After the power is turned on, pulse motors do not return to
their home positions with respect to the needle position................................30
3. Pattern cannot be selected..................................................................................30
4. Main motor does not run .....................................................................................30
5. Operation of main motor is not stable, maximum speed operation
is not possible, or speed cannot be adjusted ...................................................31
6. Correct patterns are not created.........................................................................31
7. Buttonholes are not stitched correctly ..............................................................31
8. Manual operation of feed and zigzag pulse motors is not possible ...............31
9. Vertical movement of needle bar and backstitch operation are abnormal ....31
10. Foot controller does not operate normally when depressed...........................31
11. Thread tension is not correct ..............................................................................32
12. Needle bar release mechanism does not operate correctly ............................32
13. Thread cutter does not operate correctly ..........................................................32
14. Display does not appear clearly .........................................................................32
15. The LCD light does not light................................................................................32
16. Thread cannot be wound around bobbin...........................................................32
17. Needle thread breakage detector does not operate correctly .........................32
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