Chapter 2 Connecting peripherals
21
Reset switch (J1)
You can connect an external switch to easily reset your computer.
This switch restarts your computer as if you had turned off the
power then turned it back on. Install the switch so that it closes the
two pins of J1.
External speaker (J2)
The CPU card has its own buzzer. You can also connect to the
external speaker on your computer chassis. Connect leads to
connector J2 as shown below.
External speaker (J2)
Pin no.
Function
1
Speaker out
2
Ground
3
Ground
4
+5 V
DC
Cooling fan power connector (J3)
The PCA-6157 provides an auto-switch power connector for CPU
cooling fan. When the CPU temperature exceeds the upper-limit set
in BIOS, the cooling fan power connector J3 automatically turns on.
The cooling fan shuts off when the CPU is sufficiently cooled. J3
CAN ONLY BE USED FOR THE COOLING FAN! DO NOT USE IT
FOR POWER INPUT!
EIDE SCSI active LED (J4)
You can connect a LED to connector J4 to indicate when any
IDE/SCSI device is active. Marks on the circuit board indicate LED
polarity (the pin on the right is positive).
J4
positive
