14
Step 7. Connect the Speaker
The 4-pin speaker header is located on pins 17--20 (marked as SPKR) of the front panel connector.
Connect the speaker to this header.
Signal of SPKR header
Pin 17
VCC
Pin 18
Ground
Pin 19
NC
Pin 20
BUZZ
Step 8. Connect the power LED and keylock switch
The power LED and keylock header is located on pins 11--15 (marked as PLED and KL) of the
front panel connector. It contains two functions: the power on LED header and the keylock header.
Connect chassis’s power LED and keylock switch (if supported) to these headers.
Signal of PLED header
Signal of KL header
Pin 11
Anode (+)
Pin 14
KEYLOCK
Pin 12
NC
Pin 15
Ground
Pin 13
Cathode (-)
Step 9. Connect the IDE LED
The 2-pin IDE LED header is located on pins 5--6 (marked as ALED) of the front panel connector.
Connect the chassis’s LED to this header.
Signal of ALED header
Pin 5
Anode (+)
Pin 6
Cathode (-)
Step 10. Connect the SCSI LED
The 2-pin SCSI LED header is located on pins 7--8 (marked as SLED) of the front panel connector.
Connect the chassis’s LED to this header.
Signal of SLED header
Pin 7
Anode (+)
Pin 8
Cathode (-)
Step 11. Connect the ACPI LED
The 2-pin ACPI LED is located on pins 1-2 (marked as ACPI) of the front panel connector.
Connect the chassis‘s ACPI LED to this header.
Signal of ACPI LED header
Pin 1
Cathode (-)
Pin 2
Anode (+)