Acer Aspire M3970 Acer Aspire M3970 Service Guide - Page 99

Jumper Setting The section explains how to set jumper for correct configuration of the mainboard. Setting Jumper Use the motherboard jumpers to set system configuration options. Jumpers with more Than one pin are numbered. When setting the jumpers, ensure that the jumper caps are Placed on the correct pins. Internal header pin definition Jumper/Header Name CPU_FAN (4 PIN) Header_1X3 1 2 3 CPU_FAN Function CPU FAN HEADER Definition 1: PWM 2: SENSE 3: POWER 4: GND SYS_FAN (3 PIN) SYS FAN HEADER 1: SENSE 2: POWER 3: GND CLR_CMOS (3 PIN) Yellow is symbol, Red is Pin 1 of symbol. CLEAR CMOS HEADER 1-2:CLEAR_CMOS (1:Ground, 2:RTC_RSTJ) 2-3:NORMAL (3:VCC_RTC) Yellow is symbol, Red is Pin 1 of symbol. Chapter 5 91