User`s manual

2.2 Alpha PCI 64–275 Board Connectors
Table 2–3 (Cont.) Module Connector Descriptions (See Figure 2–3)
Connector Pins Description
Enclosure Fan
J1 3 Enclosure fan connector. Pins 1 and 3 are ground. Pin
2 is +12 V.
Power LED
J3 Pins 38, 40 2 Power LED connector. Pin 38 is +5 V with a built-in
150-ohm resistor. Pin 40 is ground.
Disk Access LED
J3 Pins 29, 31 2 IDE disk access LED connector. Pin 29 is grounded on
access. Pin 31 is +5 V with a built-in 150-ohm resistor.
Key Lock
J3 Pins 32, 34 2 Key lock connector. Pin 32 is ground. Pin 34 is open
(high) when unlocked.
Board Reset
J3 (Pins 28, 30) 2 Board reset switch connector. 28 open or high to run,
ground to 30 to reset.
Speaker Connector
J3 (Pins 33, 35,
37, 39)
4 Connect speaker to 33 (signal) and 37 (ground).
Board Jumpers and Connectors 2–13