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Apple led cinema display 27inch User Manual

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Page 51

LED Cinema Display (27-inch) Take Apart — General Information 51 2010-11-18
4. Apply a strip of packing tape horizontally across the top and bottom of the glass panel. 
Next, apply the tape diagonally, across the broken glass panel, forming an “X.”
5.   Continue applying tape horizontally, thoroughly covering the broken glass. Most of the 
glass will still be attached to the steel ring that runs around the perimeter of the glass 
panel.  

Page 52

LED Cinema Display (27-inch) Take Apart — General Information 52 2010-11-18
6. Use a black stick to pry the glass panel off the magnets on the rear housing.
7.  Lift the entire glass panel off the rear housing.  

Page 53

LED Cinema Display (27-inch) Take Apart — General Information 53 2010-11-18
8. Place the broken glass inside a large box, label the box, and dispose of it properly. 
9.   Using a whisk broom, clean the work surface of tiny glass particles.
10.  Stand the iMac up and use a lint free cloth to carefully brush any of the particles off the 
iMac onto the table. Clean the work surface again.
11.  When the repair is finished the cloth should be disposed of immediately.
12.  Use a broom and dustpan to sweep up...

Page 54

LED Cinema Display (27-inch) Take Apart — General Information 54 2010-11-18
Safety
Warning: HIGH VOLTAGE: The AC/DC power supply board and logic board remain powered 
up whenever the system is plugged in. Use extreme caution when troubleshooting system 
with glass panel and LCD panel removed.  • Don’t work alone. In the event of electrical shock it is important to have another 
individual present who can provide assistance. 
•  Keep one hand in your pocket when working on any unit that is plugged in....

Page 55

LED Cinema Display (27-inch) Take Apart — Stand 55 2010-11-18
First Steps 
No preliminary steps are 
required to remove the 
stand.
Note: The stand screws 
cannot be removed from 
inside the rear housing.
 
Tools
• ESD wrist strap
•  Torx T10 screwdriver
•  Access card  
(Apple part #922-7172)
Stand  

Page 56

LED Cinema Display (27-inch) Take Apart — Stand 56 2010-11-18
Removal
1 
Place unit face down 
on a table so that 
base of stand extends 
over table edge. 
2 Press stand down 
and insert access card 
into slot between 
top of stand and rear 
housing.
3 Insert card as far as 
it will go, and press 
stand down until 
you hear a click—the 
audible cue that tells 
you that stand is 
locked into place.
4 Remove access card.  

Page 57

LED Cinema Display (27-inch) Take Apart — Stand 57 2010-11-18
5 Remove T10 screws:
(8) 922-8749 
6 Separate stand from 
clutch mechanism.
Reassembly
1 
Place unit face down 
on a table.  Align pin 
on mechanism to 
central hole in stand.
2 Replace 8 T10 screws.
3 Place unit so that 
base of stand extends 
over table edge. Press 
stand down and 
insert access card into 
slot between top  
of stand and rear 
housing.
4 Insert access card 
as far as it will go. 
Gently lift stand 
approximately two 
inches...

Page 58

LED Cinema Display (27-inch) Take Apart — Glass Panel 58 2010-11-18
First Steps
• Unplug all cables and 
the power cord.
•  Put on ESD strap.
Caution: The glass panel 
is not tempered and will 
break into sharp pieces if 
mishandled.  A scratched 
or broken glass panel is 
not covered by warranty. 
Important:  
This procedure requires 
special tools, which are 
offered individually or as 
part of a cleaning kit.  See 
General Take Apart section 
for more information.
Tools
•  ESD wrist strap
•  lint-free...

Page 59

LED Cinema Display (27-inch) Take Apart — Glass Panel 59 2010-11-18
Removal
Note: Glass panel is held 
in place by magnets.
Note: There are guide pins 
on back of glass panel. 
Be careful not to bend or 
break guide pins during 
removal or installation. 
If any pins are missing, 
check for loose metal 
pieces inside unit and 
replace glass panel.
Apple strongly 
recommends wearing 
clean, lint-free gloves 
whenever handling the 
glass panel, to reduce 
cleaning required on 
reassembly.
1 Glass panel can...

Page 60

LED Cinema Display (27-inch) Take Apart — Glass Panel 60 2010-11-18
3 Remove suction cups 
and slide glass into 
protective microfoam 
bag.
Reassembly
1 
Remove protective 
covering from silicone 
roller and sticky sheet.
2 Clean silicone roller 
by rolling it back and 
forth a few times on 
sticky sheet. 
 
If sticky sheet looks 
dirty, use a new one.  
If roller is no longer 
tacky, wash it in warm 
soapy water.   
If tackiness does not 
return, replace silicone 
roller.  
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