Keylock Header (J13); Speaker Header (J14) - TYAN THUNDER K8S Manual

2.07 – Keylock Enable/Disable Jumper (J13)
2.08 – Speaker Header (J14)
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OPEN (Default)
To enable PS/2 keyboard
CLOSED
To disable PS/2 keyboard
Pin_1
Pin_1 : VCC
Pin_2 : N/C (no
connect)
Pin_3 : Buzzer
Pin_4 : Speaker
Pin_4
Close Pin-3 and Pin-4 (Default)
Enable onboard buzzer
Open Pin-1 ~ Pin-4
Disable onboard buzzer and can
connect to chassis 1x4 speaker
14