TYAN TITAN III Manual page 10

AT Clock Timing: J22
Pins 2-3:Normal AT clock timing(Default)
Pins 1-2: Do not use.
Speaker Connector: J45
Keylock Connector: J46
Turbo Switch: J47
HDD LED: J48 (Only pins 1 and 2 are used)
S1468-001-01
Pinout Assignments
1 Speaker out
2 Ground
3 Ground
4 + 5V
Pinout Assignments
1 Led Output
2 No Connect
3 Ground
4 Keylock
5 Ground
Open for Turbo
Close for Non-Turbo
Pinout Assignments
1 Cathode
2 Anode
10