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Acer Veriton M490G Acer Veriton M490, M490G, and M498G Service Guide - Page 74

CPU_FAN: CPU Cooling FAN Power Connector, ATX1: ATX 24-pin Power Connector, System Ground

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CPU_FAN: CPU Cooling FAN Power Connector Pin 1 2 3 4 Signal Name GND +12V Sense PWM System Ground Power +12V Sensor PWM Function ATX1: ATX 24-pin Power Connector Pin 1 2 3 4 5 6 7 8 9 10 11 12 Signal Name +3.3V +3.3V Ground +5V Ground +5V Ground PWRGD +5VSB +12V +12V +3.3V Pin 13 14 15 16 17 18 19 20 21 22 23 24 Signal Name +3.3V -12V Ground PS_ON Ground Ground Ground -5V +5V +5V +5V Ground SYS_FAN: System Cooling FAN Power Connector Pin 1 2 3 Signal Name GND +12V Sense System Ground Power +12V Sensor Function ATX_12V: ATX 12V Power Connector Pin 1 2 3 4 Signal Name Ground Ground +12V +12V Chapter 5 66

Section	Page
Veriton M498G/M490G/M490 Service Guide	1
Revision History	2
Copyright	3
Disclaimer	4
Conventions	5
Table of Contents	7
System Tour	9
Features	9
Block Diagram	13
System Components	14
Front Panel	14
Rear Panel	15
Hardware Specifications and Configurations	16
Processor	16
BIOS	16
IOS Hotkey List	16
Main Board Major Chips	16
Memory Combinations	17
System Memory	17
Audio Interface	17
SATA Interface	18
USB Port	18
Environmental Requirements	18
Power Management	18
Power Management Function(ACPI support function)	19
Device Standby Mode	19
Global Standby Mode	19
Suspend Mode	19
ACPI	19
System Utilities	20
CMOS Setup Utility	20
Entering CMOS setup	21
Navigating Through the Setup Utility	21
Setup Utility Menus	22
System Disassembly	35
Disassembly Requirements	35
Pre-disassembly Procedure	36
Removing the Side Panel	37
Removing the Front Bezel	38
Removing the Heat Sink Fan Assembly	39
Removing the Processor	40
Removing the Memory Modules	41
Removing the VGA Card	42
Removing the Hard Disk Drive	43
Removing the Optical Drive	45
Removing the Power Supply	48
Removing the OBR Cable and Intrusion Alarm Cable	49
Removing the Card Reader	51
Removing the Internal Speaker	52
Removing the Mainboard	53
Removing Other Side Pannel	55
Removing the Front I/O and USB Assembly	56
Removing the Power Switch and LED Cable Assembly	58
System Troubleshooting	59
Hardware Diagnostic Procedure	59
System Check Procedures	60
Power System Check	60
System External Inspection	60
System Internal Inspection	60
Beep Codes	61
Checkpoints	62
Viewing BIOS checkpoints	62
Bootblock Initialization Code Checkpoints	62
Bootblock Recovery Code Checkpoints	64
BIOS Recovery	65
Jumper and Connector Information	66
M/B Placement	66
Jumper Setting	68
Setting Jumper	68
SATA1~6: Serial ATA connectors	69
F_AUDIO: Front Panel Audio header for Azalia	70
F_USB1~4: Front Panel USB headers	70
COM2: Onboard serial port header	70
SPDIF_OUT: SPDIF out header	71
C_INTRUSION: Chassis detect header	71
INT_SPK: Internal speaker	72
OBR: Button recovery jumper	72
PRINTER: Oboard parallel port header	72
TPM: TPM Module Header	72
CPU_FAN: CPU Cooling FAN Power Connector	74
ATX1: ATX 24-pin Power Connector	74
SYS_FAN: System Cooling FAN Power Connector	74
ATX_12V: ATX 12V Power Connector	74
Front Panel Header	75
FRU (Field Replaceable Unit) List	76
Veriton M498G/M490G/M490 Exploded Diagram	77

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