AAEON EMB-BT1 - Manual (Page 23)

2-15 Chapter 2: Motherboard information
CAUTION: Do not forget to connect the fan cables to the fan connectors.
Insufficient air flow inside the system may damage the motherboard
components. These are not jumpers! Do not place jumper caps on the fan
connectors!
2. Chassis fan connectors (4-pin CHA_FAN1)
Connect the fan cables to the fan connectors on the motherboard, ensuring
that the black wire of each cable matches the ground pin of the connector.
EMB-BT1 Chassis fan connector
CHA_FAN1
CHA FAN PWM
CPU FAN IN
CHA FAN PWR
GND
3. Front panel audio connector (10-1 pin AAFP)
This connector is for a chassis-mounted front panel audio I/O module that
supports either HD Audio or legacy AC`97 audio standard. Connect one end
of the front panel audio I/O module cable to this connector.
IMPORTANT: We recommend that you connect a high-definition front panel
audio module to this connector to avail of the motherboard’s high-definition
audio capability.
EMB-BT1 Front panel audio connector
AAFP
AGND NC SENSE1_RETUR SENSE2_RETUR
PORT1 L PORT1 R PORT2 R
SENSE_SEND
PORT2 L
HD-audio-compliant
pin definition
PIN 1
AGND NC NC NC
MIC2
MICPWR
Line out_R
NC
Line out_L
Legacy AC’97
compliant definition