Service manual

A-1
Connector Pin Assignments
The tables in this appendix list the pin assignments for each connector on the CPU
assembly and the power supply boards. Following each table is a dictionary of the signal
names listed in the table. Signal names that begin with a lowercase n are active low
signals. NC means no connection to a pin. Refer to Figure 3-1 to see how the system
interconnects.
6CPU Assembly Connectors
The system’s 5 V power supply is divided into several circuits, each of which is passively
filtered for EMI. Therefore, the +5V signal shown in the pin assignment tables does not
always represent the same filtered 5 volt circuit.
NOTE