Service Manual Chapter6. Control Electronics
© 2013
Nautilus Hyosung Inc.
All Rights Reserved.
6-11
► Front Panel Header
The front panel header (F_PANEL) provides a standard set of switch and LED headers
commonly found on ATX or Micro ATX cases. Refer to the table below for information:
Pin
Signal
Function
Pin
Signal
Function
1
HD_LED_P
Hard disk LED(+)
2
FP PWR/SLP
*MSG LED(+)
3
HD_LED_N
Hard disk LED(-)
4
FP PWR/SLP
*MSG LED(-)
5
RST_SW_N
Reset Switch(-)
6
PWR_SW_P
Power )
7
RST_SW_P
Reset )
8
PWR_SW_N
Power Switch(-)
9
RSVD
Reserved
10
Key
No pin
*
MSG LED (dual color or single color)
► Hard Drive Activity LED
Connecting pins 1 and 3 to a front panel mounted LED provides visual indication that
data is being read from or written to the hard drive. For the LED to function properly, an
IDE drive should be connected to the onboard IDE interface. The LED will also show
activity for devices connected to the SCSI (hard drive activity LED) connector.
►
Power/Sleep/Message waiting LED
Connecting pins 2 and 4 to a single or dual-color, front panel mounted LED provides
power on/off, sleep, and message waiting indication.
► Reset Switch
Supporting the reset function requires connecting pin 5 and 7 to a momentary contact
switch that is normally open. When the switch is closed, the board resets and runs
POST.
► Power Switch
Supporting the power on/off function requires connecting pins 6 and 8 to a momentary-
contact switch that is normally open. The switch should maintain contact for at least 50
ms to signal the power supply to switch on or off. The time requirement is due to
internal de-bounce circuitry. After receiving a power on/off signal, at least two seconds
elapses before the power supply recognizes another on/off signal.
