IBM 5280 Maintenance Information Manual page 17

D
PTX Connector
II
LED Connector
A01
PTX col (+5 V)
A01 ground
A02
blank
A02
not used
A03
PTX emitter
B01 LED anode
A04 not used
B02 blank
fJ
I/O I nterface Connector
a
Solenoid Connector
A01 -5 V
A01 not used
A02
power supply ground
A02
blank
A03 - A18 ground
A03 +24 V
801
+5 V
A04 -head load
802
blank
B03 +24 V
m
Head Connector
804
+index
805 +diskette 2 sense
A01 ground
806
+write/erase sense
A02 blank
807
+file data
A03 erase coil
808 +inner tracks
A04 blank
809 +erase gate
A05 read/write coil
810
+access 0
A06 read/write coil
811
not used
A07
ground
812 not used
813 +access 1
m
Stepper Motor Connector
814 +write gate
815
+head engage
A01
+24 V
816
not used
A02
blank
817 write data
A03 MC-3
818
not used
A04 MC-2
A05 MC-1
A06 MC-O
333
Locations 5