Brother LZ2-B855E Service Manual page 71

P16 [NPM](MOLEX 5557-06R)
Pin No. Signal name
1 Zigzag PM driving current (NA)
2 Zigzag PM driving current (NB)
3 Zigzag PM driving current (NC)
4 Zigzag PM driving current (ND)
5 Zigzag PM driving current (NE)
6 -
P17 [POWER(OP)] (not attached)
P18 [SOL] (JAPAN SOLDERLESS TERMINAL XHP-16)
Pin No. Signal name
1 0V (actuator switch)
2 0V (knee switch)
3 Actuator switch input
4 Knee switch input
5 -
6 Thread trimmer SOL driving
7 Thread wiper SOL driving
8 Back tacking SOL driving
9 Presser foot lifter SOL driving
10 Upper thread feeding SOL driving
11 TR40V (Presser foot lifter SOL)
12 +40V (Thread trimmer SOL)
13 TR40V (Back tacking SOL)
14 TR40V (Thread wiper SOL)
15 +40V (Upper thread feeding SOL)
16 -
P19 [OPSOL] (not attached)
P20 [AC17V/AC30V] (JAPAN SOLDERLESS TERMINAL VHR-5N)
Pin No. Signal name
1 AC30V
2 AC30V
3 -
4 AC17V
5 AC17V
P21 [L-THREAD] (not attached)
Probable symptoms due to poor contact
Home position can not be found.
The machine does not zigzag.
The zigzagging is not correct.
Error code Ec1 appears.
Probable symptoms due to poor contact
Thread can not be trimmed.
Thread can not be wiped.
Upper thread can not be fed.
Back tacking can not be sewn.
Presser foot does not rise.
Actuator switch does not have any effect.
Knee switch does not have any effect.
Probable symptoms due to poor contact
Error code EE5 appears.
LZ2-B855E,B856E
8. ELECTRIC COMPONENTS
8-12