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Acer Veriton X270 Aspire X1700 / Veriton X270 Service Guide - Page 25

Frequency/Voltage Control

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Frequency/Voltage Control Parameter Spread Spectrum Description Enables or disables the reduction of the mainboard's EMI. Note: Remember to disable the Spread Spectrum feature if you are overclocking. A slight jitter can introduce a temporary boost in clock speed causing the overclocked processor to lock up. Option Enabled Disabled Chapter 2 17

Section	Page
Aspire X1700 and Veriton X270 Service Guide	1
Table of Contents	7
System Tour	9
Features	9
System Components	11
Front Panel	11
Rear Panel	12
Internal Components	13
System LED Indicators	14
System Utilities	15
CMOS Setup Utility	15
Entering CMOS setup	16
Navigating Through the Setup Utility	16
Setup Utility Menus	17
System Disassembly	31
Disassembly Requirements	31
Pre-disassembly Procedure	32
Main Unit Disassembly	33
X1700 model	33
X270 model	34
Screw List	35
Removing the Side Panel	36
Removing the Front Bezel	37
Removing the Heat Sink Fan Assembly	38
Removing the Processor	40
Removing the Optical Drive	42
Removing the Hard Disk Drive	45
Removing the Power Supply	48
Removing the Memory Modules	50
Removing the VGA Card (X1700 model)	51
Removing the TV Tuner Card (X1700 model)	52
Removing the Front I/O and Card Reader Boards	53
Removing the Mainboard	57
Removing the Power Switch and LED Cables	59
Removing the LAN Activity and HDD LED Cables (X270 model)	62
System Troubleshooting	63
Hardware Diagnostic Procedure	63
System Check Procedures	64
Power System Check	64
System External Inspection	64
System Internal Inspection	64
Beep Codes	65
Online Support Information	66
System Block Diagram and Board Layout	67
System Block Diagram	67
Board Layout	68
Mainboard	68
System Jumpers	70
FRU (Field Replaceable Unit) List	71
Exploded Diagram	72
X1700	72
X270	73
X1700 FRU List (81.3V401.007G)	74
X270 FRU List (91.3V401.006G)	84

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