Universal Serial Bus Connectors; Processor Sockets; Processor And Dimm Sockets On The System Board; Universal Serial Bus Connector Pin Assignments - NEC PowerMate Professional 9000E Series Service Manual

Universal Serial Bus Connectors

The pin assignments for the universal serial bus (USB) connectors are provided
in the following table.

Processor Sockets

The processor socket is designed for easy processor upgradeability through use
of a Single Edge Contact (S.E.C.) cartridge. The cartridge contains the
processor, second level cache, thermal plate, and back cover. In addition, a
heatsink is connected to the cartridge.
The 242-pin edge connector sockets (Slot 1) on the system board hold one or
two processor S.E.C. cartridges. The cartridges are held in place in the socket by
a retention mechanism. With a cartridge plugged into the socket, the processor's
pins automatically set the system board voltage regulator and processor speed
(100 MHz).
To remove a processor, see Section 3, "Disassembly and Reassembly."

Processor and DIMM Sockets on the System Board

A – Secondary Processor Connector B – Primary Processor Connector
C – Secondary Heatsink Fan Connector D – Primary Heatsink Fan Connector
E – DIMM Sockets

Universal Serial Bus Connector Pin Assignments

Pin
1
2
3
4
Signal
+5V (cable power)
- Data
+ Data
Ground (cable ground)
System Board 4-5