J19: Chassis Fan Power Connector; J20: Front Bezel Connectors; Speaker: Pins - TMC TI6NL User Manual

5.11 J19: Chassis Fan Power Connector

J19 is a 3-pin header for the CPU fan power connector. The fan must be a
12V fan.
1 2 3

5.12 J20: Front Bezel Connectors

The front bezel of the case has a control panel which provides light
indication of the computer activities and switches to change the computer
status. J20 is a 20-pin header that provides interfaces for the following
functions.
Hard Disk Drive LED
Turbo LED Connector
Not Defined
Speaker

Speaker: Pins 1 - 4

This connector provides an interface to a speaker for audio
tone generation. An 8-ohm speaker is recommended.
TI6NL User's Manual
Chapter 5 Installation
J19 Pin # Signal Name
1 Rotation
2 +12V
3 Ground
Reset Switch
ATX Power On Switch
Power LED and Keylock
J20 Pin # Signal Name
1 Speaker out
2 No connect
3
4
Ground
+5V
23