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Acer Aspire M3920 Service Guide - Page 75

Connecting Case Components, CPUFAN1: CPU Cooling Fan Power Connector - power supply

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Connecting Case Components After you have installed the motherboard into a case, you can begin connecting themotherboard components. Refer to the following: 1. Connect the CPU cooling fan cable to CPUFAN1. 2. Connect the standard power supply connector to PWR2. 3. Connect the case switches and indicator LEDs to the LEDH1. 4. Connect the auxiliary case power supply connector to PWR1. CPUFAN1: CPU Cooling Fan Power Connector Pin Signal Name 1 GND 2 +12V 3 Sense 4 PWM Function System ground Power +12V Sensor PWM Chapter 5 67

Section	Page
Acer Aspire M3920 Service Guide	1
Features and Specifications	9
System Features	9
Audio	10
I/O Ports and LED Indicators	10
Physical Specifications	11
Environmental Requirements	11
Power Management Function(ACPI support function)	11
Device Standby Mode	11
Global Standby Mode	11
Suspend Mode	11
ACPI	12
Front View	12
Rear View	13
System Utilities	15
CMOS Setup Utility	15
Entering CMOS setup	16
Navigating Through the Setup Utility	16
Setup Utility Menus	17
Main	18
Advanced	19
Power	24
Security	25
Boot Options	26
Exit	27
System Disassembly	29
Disassembly Requirements	29
Pre-disassembly Procedure	29
Removing the Side Panel	30
Removing the Heatsink Fan Assembly	31
Removing the Processor	32
Removing the VGA Card	34
Removing the Mode Card	35
Removing the TV Card	36
Removing the Memory Modules	36
Removing the Hard Disk Drive	37
Removing the USB Board	40
Removing the Front Bezel	43
Removing the Optical Drive	45
Removing the Removable HDD	47
Removing the Card Reader	51
Removing the Power Supply	54
Removing the Mainboard	56
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
System Architecture	67
Block Diagram	67
Mainboard Layout	68
Jumper Setting	69
Internal header pin definition	70
Connector pin definition	71
Connecting Optional Devices	73
Connecting Case Components	75
CPUFAN1: CPU Cooling Fan Power Connector	75
PWR2: ATX 24-pin Power Connector	76
PWR1: ATX 12V Power Connector	76
Front Panel Header	76
FRU (Field Replaceable Unit) List	77
Aspire M3920 Exploded Diagram	78

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