Power Supply (Primary; Keyboard And Mouse Connectors; Table B-6 Primary Power Supply Connector Pin Assignments; Table B-7 Keyboard And Mouse Connector Pin Assignments - NEC DIRECTION SP B - SERVICE MANUAL 1998 Service Manual

B-6 Connector Pin Assignments

POWER SUPPLY (PRIMARY)

Voltages from the power supply are input to the system board through the primary power
supply connector. Table B-6 shows the connector pin locations and pin assignments.

Table B-6 Primary Power Supply Connector Pin Assignments

Pin Signal
1 +3.3 V
2 +3.3 V
3 Ground
4 +5 V
5 Ground
6 +5 V
7 Ground
8 PWRGD (Power Good)
9 +5 VSB (Standby for real-time clock)
10 +12 V

KEYBOARD AND MOUSE CONNECTORS

The keyboard and mouse use standard PS/2 connectors. Pin assignments are given in
Table B-7.

Table B-7 Keyboard and Mouse Connector Pin Assignments

Pin Keyboard Connector
1 Keyboard Data
2 No connect
3 Ground
4 +5V (fused)
5 Keyboard Clock
6 No connect
Pin Signal
11 +3.3 V
12 –12 V
13 Ground
14 PS-ON# (Power supply remote
on/off control
15 Ground
16 Ground
17 Ground
18 –5 V
19 +5 V
20 +5 V
Mouse Connector
Mouse Data
No connect
Ground
+5V (fused)
Mouse Clock
No connect