440EX/LX AT
MAINBOARD
HARDWARE SETUP
3-16
(S)
Speaker and Key Lock Connector:
CN4
CN 5
BAT 1
CN
1
SY
S.
B
IO
S
+
-
CN10
CN11
CN6
SL
O
T
1
CN
7
CN
9
CN 2
CN 16
CN 1
5
CN
1
4
CN17
CN18
RS
HL
TL
SL
PW
PL KBLOCK
SPKR
JP 7
JP 8
JP 9
JP 3
JP
4
JP
5
JP
6
JP 11
CN 8
CN
19
1 2 3 4 5
1 2 3 4 5
SPKR & KBLOCK CONNECTORS
SPKR
KEYLOCK
SPKR: Speaker connector
1
Pin # Signal name
1
+ 5V DC
2
Speaker Data Signal
3
Speaker Data Signal
4
Speaker Data Signal
5
No Connection
5
PL & KEYLOCK: Panel Power LED and Key-Lock Connector
1
Pin # Signal name
1
Pullup (+ 5V DC for Power LED)
2
Ground
3
Ground
4
Keyboard Lock
5
Ground
5
