Pfaff 939 U Adjustment Manual page 58

Circuit diagrams
2 Circuit diagrams
.02
Referenc list for circuit diagrams
58
A1 Controller P40 ED
A2 Control panel S3
A14 Oberteilerkennung (OTE)
B1 Initiator zig-zag stitch control (only on the PFAFF 939 U)
H1 Sewing lamp
H10 LED Stitch counter
Q1 Main switch
S1 Pedal set value transmitter
S6 Start inhibitor key (only on the PFAFF 939 U)
S41 Manual backtacking
S42 Needle position change key
S43 Single stitch key
S46 Bridge start inhibitor (only on the PFAFF 3704)
X0 RS 232 interface (PC)
X1 Motor
X2 Incremental transmitter
X3 Set value transmitter
X4 Control panel S3
X5 Inputs/outputs
X6 Bobbin thread monitor (optional)
X7 Light barrier (optional)
X22 -900/.. thread trimmer (FS)
X24 -910/.. automatic presser foot lift
X25 -911/.. backtacking device
X28 Thread tension release (FSL)
X40 Keyboard
X46 Start inhibitor
X50 Sewing head identifi cation (OTE)
Y2 -900/.. thread trimmer
Y4 -910/.. automatic presser foot lift
Y5 -911/.. Vbacktacking device
Y8 Thread tension release (FSL)