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Apple imac 20 inch mid 2009 User Manual

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Page 141

iMac (20-inch, Early/Mid 2009) Take Apart — Optical Drive Data Cable 141 2010-11-24
First Steps
Remove:
• Access Door
•  Glass Panel
•  Front Bezel
•  LCD Panel
•  Optical Drive
•  Optical Drive Fan
Tools
• ESD wrist strap
Optical Drive Data Cable  

Page 142

iMac (20-inch, Early/Mid 2009) Take Apart — Optical Drive Data Cable 142 2010-11-24
Removal
1 
Disconnect cable 
from logic board 
above audio board.
2 Lift cable from 
adhesive securing it 
to rear housing.  

Page 143

iMac (20-inch, Early/Mid 2009) Take Apart — Inverter 143 2010-11-24
First Steps
Remove:
• Access Door
•  Glass Panel
•  Front Bezel
•  LCD Panel
•  Optical Drive
Tools
• ESD wrist strap
•  Torx T10 screwdriver
Inverter  

Page 144

iMac (20-inch, Early/Mid 2009) Take Apart — Inverter 144 2010-11-24
Removal
1 
Remove T10 screws: 
(2) 922-8251
2 Disconnect inverter 
power connector  
(pull in direction of 
hard drive).
3 Lift inverter cover and 
inverter board out of 
rear housing.  

Page 145

iMac (20-inch, Early/Mid 2009) Take Apart — Power Supply 145 2010-11-24
First Steps
Remove:
• Access Door
•  Glass Panel
•  Front Bezel
•  LCD Panel
 
Warning: HIGH VOLTAGE:  
Use extreme caution 
when working around 
the power supply, which 
contains a high-voltage 
capacitor that may remain 
charged for several 
minutes even when the 
computer is unplugged.  
Never touch the leads on 
the top side of the power 
supply, especially those 
near the warning sign.
Tools
•  ESD wrist strap
•  Torx T10...

Page 146

iMac (20-inch, Early/Mid 2009) Take Apart — Power Supply 146 2010-11-24
Removal
1 
Remove T10 screws: 
(2) 922-6800, self-tap 
(2) 922-6842, machine
Reassembly Note: Install 
self-tapping screws on left 
side and machine screws 
on right side.
2 Disconnect 3 cables: 
•  large DC power 
supply cable
•  small 2-pin ground 
connector
•  AC inlet cable 
(protruding from 
pressure wall)
3 Lift power supply out 
of rear housing.  

Page 147

iMac (20-inch, Early/Mid 2009) Take Apart — Power Supply 147 2010-11-24
Reassembly Note:  
Make sure pressure wall is 
in place.  If it was removed, 
slip pressure wall over 
2 posts on chassis and 
replace 2 screws.  

Page 148

iMac (20-inch, Early/Mid 2009) Take Apart — Left Speaker 148 2010-11-24
First Steps
Remove:
• Access Door
•  Glass Panel
•  Front Bezel
•  LCD Panel
Tools
• ESD wrist strap
•  Torx T10 screwdriver
Left Speaker  

Page 149

iMac (20-inch, Early/Mid 2009) Take Apart — Left Speaker 149 2010-11-24
Removal
1 
Remove T10 screw: 
(1) 922-8249
2 Disconnect speaker 
cable from audio 
board.
Reassembly Note: Tuck 
speaker cable under cable 
clip on CPU fan and route 
as shown.
3 Lift speaker up and 
out of computer.  

Page 150

iMac (20-inch, Early/Mid 2009) Take Apart — Ambient Temp Sensor Cable 150 2010-11-24
First Steps
Remove:
• Access Door
•  Glass Panel
•  Front Bezel
Tools
• ESD wrist strap
Ambient Temp Sensor Cable  
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