Table Of Contents - Brother LZ2-B855E Service Manual

1. MACHINE SPECIFICATIONS ...................
2. SEWING PATTERN TABLE .......................
3. MECHANICAL DESCRIPTIONS
3-1. Needle bar and thread take-up mechanism
.................................................................. 3-01
3-2. Lower shaft and rotary hook mechanism .. 3-01
3-3. Zigzag mechanism .................................... 3-02
3-4. Presser foot mechanism ........................... 3-03
3-5. Feed mechanism ...................................... 3-04
3-6. Lubrication ................................................ 3-06
3-7. Thread trimmer mechanism (B856E) ........ 3-07
3-8. Tension release mechanism ..................... 3-08
3-9. Thread wiper mechanism (B856E) ........... 3-09
4. DISASSEMBLY
4-1. Cover ........................................................ 4-01
4-2. Presser mechanism .................................. 4-02
4-3. Needle bar mechanism ............................. 4-02
4-4. Zigzag mechanism .................................... 4-03
4-5. Rotary hook mechanism ........................... 4-04
4-6. Feed mechanism ...................................... 4-04
4-7. Thread trimmer mechanism (B856E) ........ 4-05
4-8. Thread wiper mechanism (B856E-40[ ], -90[ ])
.................................................................. 4-06
4-9. Panel ......................................................... 4-07
5. ASSEMBLY
5-1. Thread trimmer mechanism (856E) .......... 5-01
5-2. Feed mechanism ...................................... 5-02
5-3. Zigzag mechanism .................................... 5-03
5-4. Needle bar mechanism ............................. 5-04
5-5. Rotary hook mechanism ........................... 5-05
5-6. Presser mechanism .................................. 5-06
5-7. Panel ......................................................... 5-07
5-8. Cover ........................................................ 5-08
5-9. Thread wiper mechanism (B856E-40[ ], -90[ ])
.................................................................. 5-09
6. ADJUSTMENTS
6-1. Adjusting the thread tension spring .......... 6-01
6-2. Adjusting the presser foot height .............. 6-02
6-3. Adjusting the feed dog height ................... 6-02
6-4. Adjusting the feed dog angle .................... 6-03
6-5. Adjusting the forward/back, right/left position
of the feed dog .......................................... 6-03
6-6. Adjusting the stitch length ......................... 6-04
6-7. Adjusting the needle and feed mechanism
timing ........................................................ 6-05
6-8. Adjusting the forward/back position of the
needle bar ................................................. 6-06
6-9. Adjusting the right/left position of the needle
bar ............................................................. 6-07
6-10. Adjusting the needle bar height ................ 6-08
6-11. Adjusting the needle and rotary hook timing
.................................................................. 6-09
CONTENTS
6-12. Adjusting the hook stopper position .......... 6-09
1-01
6-13. Adjusting the synchronizer ........................ 6-10
2-01
6-14. Adjusting the rotary hook lubrication amount
.................................................................. 6-11
6-15. Adjusting the lubrication amount of the needle
bar ............................................................. 6-12
6-16. Adjusting the tension release of thread trim-
ming (B856E) ............................................ 6-13
6-17. Adjusting the thread trailing length after thread
trimming (B856E) ...................................... 6-14
6-18. Adjusting the triming of the thread trimming
(B856E) ..................................................... 6-15
6-19. Adjusting the tension of the lower thread
presser spring (B856E) ............................. 6-16
6-20. Adjusting the thread wiper (B856E) .......... 6-16
6-21. Adjusting the reverse feed assembly
(B855E/BT,B856E) .................................... 6-17
7. TROUBLESHOOTING ...................................... 7-01
8. ELECTRIC COMPONENTS
8-1. Precautions at the time of adjustment ...... 8-01
8-2. Components inside the control box .......... 8-01
8-3. Fuse explanation ...................................... 8-04
8-4. Connectors ............................................... 8-06
8-5. Summary of DIP switches ......................... 8-17
8-6. Memory switches ...................................... 8-18
8-7. Parameters ............................................... 8-21
8-8. Speed parameter ...................................... 8-24
8-9. Initialization ............................................... 8-25
8-10. List of error codes ..................................... 8-25
8-11. Troubleshooting ........................................ 8-27
8-12. Control circuit block diagram .................... 8-34
LZ2-B855E,B856E