Toshiba Equium 5160D Series Preliminary Maintenance Manual page 117

Speaker
The speaker provides error beep code information during the Power-On Self Test (POST), if
the system cannot use the video interface. Jumpering pins 26-27 (the last two pins of J2A1)
enables the onboard speaker. To disable the onboard speaker (and allow use of the chassis
speaker), remove the jumper from these pins. You can also disable the onboard speaker using
a CMOS Setup option.
Keylock Connector (J3A1)
The Keylock connector pinout is listed in Table B- 52.
Fan Connector (J4A1)
The auxiliary fan connector (J4A1) is a 1-by-3 header that can accept either two-position
(power and ground) or three-position (power, ground, and fan sense) fan plugs. Figure B-25
indicates the required orientation and positioning of the fan plug. Table B-
and pinout for the fan connector.
TM
Equium Series Maintenance Manual------------------------------------------------------------ B-5
Table B-52 Keylock Connector (J3A1)
Pin Signal Name
1 Ground
2 KB_LOCK
3 Ground
Figure B-25 Fan Connector Usage
Table B-53 Auxiliary Fan Connector (J4A1)
Pin Signal Name / Function
1 Ground
2 Fan Power
3 Fan Sense (Tachometer)
53 lists the signals