Apple imac 20 inch early 2008 User Manual

iMac (20-inch Early 2008)  Take Apart — General Information 11
Product Configurations
To confirm the configuration from the Apple menu, choose About This Mac. The Processor listing 
will show the speed of the processor followed by the processor type.
The following table shows the iMac (20-inch Early 2008) model configurations at introduction: 
FeatureGood ModelBetter Model
Intel Core 2 Duo processor 2.4 GHz 2.66 GHz
Memory 1 GB (1 x 1 GB) 800 MHz 
DDR2 (4 GB max) 2 GB (2 x 1 GB) 800 MHz DDR2  
(4 GB...

iMac (20-inch Early 2008)  Take Apart — General Information 12
Serial Number Location 
On the bottom of your iMac stand, you’ll find a label with the serial number printed on it.
General Tools 
The following tools are required to service the computer:
ESD-safe workstation and mat
• 
Soft, clean towel or cloth (to protect the display and removed parts from scratches)• 
Black stick (or other nonconductive nylon or plastic flat-blade tool)• 
Phillips #2 screwdriver• 
Torx T6 screwdriver (magnetized)• 
Torx...

iMac (20-inch Early 2008)  Take Apart — General Information 13
922-8253 Gloves, lint-free, anti-static, Pkg. of 2 5. 
922-8259  Microfoam bag to store the glass panel, Pkg. of 56. 
922-8258  ESD bags, 24x20, Pkg. of 5, to store the LCD panel. 7. Note:  To prevent the buildup 
of static charges which may attract dust particles to the surface of the display, store the LCD 
panel in an anti-static bag whenever it has been removed from the system.
iKlear Apple Polish or Brillianize anti-static spray cleaning...

iMac (20-inch Early 2008)  Take Apart — General Information 14
View Under the LCD Panel
Note:  To prevent the buildup of static charges which may attract dust particles to the surface of 
the LCD display, store the display in an anti-static bag whenever it has been removed from the 
system.
View of the Main Modules 

iMac (20-inch Early 2008)  Take Apart — General Information 15
View of Inside the Rear Housing
Inside the rear housing you can see the chassis, AC inlet filter, the mechanism, the hard drive 
fan, the DC/power supply/SATA/inverter cable, the microphone cable, the camera cable, and the 
antennas.
Back View
The input/output ports are located on the bottom left side on the back of the computer. The 
power on button is located on the bottom right side on the back of the computer. 

iMac (20-inch Early 2008)  Take Apart — General Information 16
I/O Ports
The input/output ports from left to right are:
Headphone out/optical digital audio out port
•	
Audio in/optical digital audio in port
•	
USB 2.1 ports (3)
•	
FireWire 400 port
•	
Firewire 800 port
•	
Ethernet (10/100/1000 Base-T ) port
•	
Mini-DVI port
•	 

iMac (20-inch Early 2008)  Take Apart — General Information 17
Cleaning and Handling the Glass Panel
Follow the cleaning procedures in this manual to ensure the glass panel is free of dust and other 
particles before returning the computer to the customer.  
Note: To view the movie, make sure the manual is opened in Acrobat.
 
The iMac (20-inch Early 2008) model has a glass panel that attaches to the outside of the • 
front bezel. 
The glass panel is not tempered and will break into sharp pieces if...

iMac (20-inch Early 2008)  Take Apart — General Information 18
Do’s and Don’ts
DO
Handle glass panel using lint free gloves.• 
Use only a sticky silicone roller to clean the inside surface of the glass and the LCD panel.• 
Use iKlear • ONLY on the outside surface of the glass panel or use the LENSPEN.
Place the glass panel into a clean protective microfoam bag when it is not installed on an 
• 
iMac.
Store the glass panel in a safe area where it will not be broken or damaged.
• 
Store the LCD panel in an...

iMac (20-inch Early 2008)  Take Apart — General Information 19
Safety
WARNING: HIGH VOLTAGE:  The highlighted module below is an AC/DC power supply that 
poses a shock hazard. When the computer is under power, be aware that the power supply 
contains high voltages that pose a potential hazard to your personal safety.  Never work on or 
near the power supply with the unit powered on;  and as a further precaution, always make sure 
the unit is unplugged when working on it with the front bezel removed.  A...

iMac (20-inch Early 2008)  Take Apart — General Information 20
EMI Shielding
The rear cover of the computer is wrapped in EMI shielding that is easily torn and damaged. To 
maintain a properly shielded unit, you must repair all accidental tears and cracks to the shielding 
by covering them with EMI tape that can be ordered from Apple service.