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Acer Power FG Aspire T680 and Power FG Service Guide - Page 50

Frequency Control, Spread Spectrum

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Frequency Control CMOS Setup Utility-Copyright © 1985-2004, American Megatrends, Inc, Frequency Control Auto Detect DIMM/PCI ClK [Enabled] Item Help Spread Spectrum [Enabled] Menu Level X KLIJ: Move Enter: Select +/-/: Value F10:Save ESC: Exit F9: Default Settings F1: General Help Parameter Auto Detect DIMM/PCI Clk Spread Spectrun Description When this item is enabled, BIOS will disable Enabled the clock signal of free DIMM and PCI slots. Disabled If you enable spread spectrum, it can significantly reduce the EMI (Elector Magnetic Interference) generated by the system. Enabled Disabled Option Chapter 2 43

Section	Page
S.G_Aspire T680 & AcerPower FG	1
Revision History	2
Copyright	3
Disclamier	3
Conventions	4
Preface	5
T.O.C	6
S.G_Aspire T680 & AcerPower FG_CH1	8
System Specifications	8
Overview	8
Features	9
Block Diagram	13
MainBoard Placement	14
Aspire T680 Front Panel	16
AcerPower FG Front Panel	17
Rear Panel	18
System Peripherals	19
Mouse (PS/2 or USB, manufacturing option)	19
Keyboard (PS/2 or USB, manufacturing option)	19
Speakers	20
Acer eRecovery	21
Create backup	21
Restore from backup	21
Create factory default image CD	21
Re-install bundled software without CD	22
Change Password	22
Acer disc-to-disc recovery	23
Restore without a Recovery CD	23
Multilingual operating system installation	23
Hardware Specifications and Configurations	24
Jumper Setting	30
Connector	31
ATX 1	31
ATX 12V	31
SYS_FAN	31
CPU FAN	32
F_USB1	32
F_USB2	32
CD-IN1	32
F_PANEL	33
S.G_Aspire T680 & AcerPower FG_CH2	34
System Utilities	34
Entering Setup	35
Product Informatoin	36
Standard CMOS Features	37
Advanced BIOS Features	39
Boot Device Priority	41
Hard Disk Drives	42
Removable Devices	43
CD/DVD Drives	44
Advanced Chipset Features	45
Integrated Peripherals	46
Power Management Setup	48
Frequency Control	50
PnP/PCI Configuration	51
Load Default Settings	52
PC Health	53
Set Supervisor/User Password	54
Save & Exit Setup	55
Exit Without Saving	56
S.G_Aspire T680 & AcerPower FG_CH3	57
Machine Disassembly and Replacement	57
General Information	58
Before You Begin	58
Disassembling the Aspire T680	59
Removing the Housing	59
Removing the Front Panel	59
Removing the Cables from Mainboard	60
Removing the Cables from Devices	60
Removing the ODD	61
Removing the FDD	61
Removing the Card Reader	61
Removing the HDD	61
Removing the DIMM	62
Removing the USB Module	62
Removing the Heatsink and CPU	62
Removing the System FAN	63
Removing the Power Supply	63
Removing the Mainboard	63
S.G_Aspire T680 & AcerPower FG_CH4	64
Troubleshooting	64
Power-On Self-Test (POST)	65
POST Check Points	66
POST Error Messages List	72
Error Symptoms List	74
S.G_Aspire T680 & AcerPower FG_CH5	79
FRU (Field Replaceable Unit) List	79

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