Acer Power F1 Power F1/ Aspire T310 Service Guide - Page 88

Front Panel Connector The front panel connect (PANEL 1) provides a standard set of switch and LED connectors commonly found on ATX or micro-ATX cases. Refer to the table below for information: Setting Pin Signal 1 HD_LED_P 3 HD_LED_N 5 RST_SW_N 7 RST_SW_P 9 RSVD Function Hard disk LED ([positive) Pin 2 Signal FP PWR/SLP Hard disk active 4 LED (negative) FP PWR/SLP Reset Switch 6 Reset Switch 8 Reserved 10 PWR_SW_P PWR_SW_N NC Function MSG LED(dual color or single color (+)) MSG LED( dual color or single color(-)) Power Switch Power Switch No Pin Function Hard Disk Activity LED Power/Sleep/ Message Waiting LED Reset Switch Power Switch Description 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. Connecting pis 2 and 4 to a signal- or dual-color, front panel mounted LED provides power on/off, sleep, and message waiting indication. Supporting the reset function requires connecting pins 5 and 7 to a momentary-contact switch that is normally open. When the switch is closed, the board resets and runs POST. 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 50ms to signal the power supply to switch on or off. The time requirement is due to internal debounce circuitry. After receiving a power on/off signal, at lease two seconds elapses before the power supply recognizes another on/off signal. Chapter 5 75