HP 500B - Manual (Page 92)

D Connector Pin Assignments
This appendix contains the pin assignments for many computer and workstation connectors. Some
of these connectors may not be used on the product being serviced.
4-Pin Power (for CPU)
Connector and Icon Pin Signal
1
2
3
4
GND
GND
+12V CPU
-12V CPU
Ethernet BNC
Connector and Icon Pin Signal
1
2
Data
Ground
USB
Connector and Icon Pin Signal
1
2
3
4
+5 VDC
- Data
+ Data
Ground
84 Appendix D Connector Pin Assignments