Headers & Connectors - Biostar IJ40C-IBS Manual

2.5 Headers & Connectors
ATXPWR1: ATX Power Source Connector
For better compatibility, we recommend to use a standard ATX 24-pin power supply for this
connector. Make sure to find the correct orientation before plugging the connector.
ATXPWR2: ATX Power Source Connector
The connector provides +12V to the CPU power circuit.
Note
» Before you power on the system, please make sure that both ATXPWR1 and ATXPWR2 connectors
have been plugged-in.
» Insufficient power supplied to the system may result in instability or the peripherals not functioning
properly. Use of a PSU with a higher power output is recommended when configuring a system with
more power-consuming devices.
PANEL1: Front Panel Header
This 16-pin header includes Power-on, Reset, HDD LED, Power LED, and speaker connection.
Pin Assignment Pin
13 +3.3V 1
14 -12V 2
15 Ground 3
16 PS_ON 4
17 Ground 5
18 Ground 6
19 Ground 7
20 NC 8
21 +5V 9
22 +5V 10
23 +5V 11
24 Ground 12
Pin Assignment
1 +12V
2 +12V
3 Ground
4 Ground
Pin Assignment Function
1 +5V
2 N/A
Speaker
3 N/A Connector
4 Speaker
5 HDD LED (+) Hard drive
6 HDD LED (-) LED
7 Ground
Reset
8 Reset control button
Chapter 2: Hardware installation | 11
J4025NHU / J4125NHU
Assignment
+3.3V
+3.3V
Ground
+5V
Ground
+5V
Ground
PW_OK
Standby Voltage+5V
+12V
+12V
+3.3V
Pin Assignment Function
9 N/A
N/A
10 N/A
11 N/A N/A
12 Power LED (+)
13 Power LED (+) Power LED
14 Power LED (-)
15 Power button Power-on
16 Ground button