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Apple led cinema display 27inch User Manual

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Page 81

LED Cinema Display (27-inch) Take Apart — Power Supply 81 2010-11-18
Removal
1 
Remove T10 screws: 
(2) 922-9348, long,  
at left 
 
 
(2) 922-8685, short, 
machine, at right 
2 Disconnect 2 cables 
below power supply.
3 Lift up power 
supply, flip over and 
disconnect DC power 
cable.  

Page 82

LED Cinema Display (27-inch) Take Apart — DC Power Cable 82 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
•  Power Supply
•  Logic Board
Tools
• ESD wrist strap
DC Power Cable  

Page 83

LED Cinema Display (27-inch) Take Apart — DC Power Cable 83 2010-11-18
Removal
1 
Remove “H” tape 
securing cable to 
pressure wall above 
power supply.
2 Lift cable out of rear 
housing.
Reassembly Note:
Cable routes through long 
flat black plastic guide in 
rear housing.  

Page 84

LED Cinema Display (27-inch) Take Apart — Fan 84 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
Tools
• ESD wrist strap
•  Torx T10 screwdriver
Fan  

Page 85

LED Cinema Display (27-inch) Take Apart — Fan 85 2010-11-18
Removal
1 
Remove T10 screws: 
(3) 922-9722 
2 Observe cable routing 
through black plastic 
guides in rear housing.
3 Disconnect 2 cables 
from logic board:
•  fan cable (4-pin)
•  sensor cable (3-pin)
Reassembly Note:  
For easier access to 
reconnect cables, unscrew 
and flip over logic board.  

Page 86

LED Cinema Display (27-inch) Take Apart — Fan 86 2010-11-18
4 Remove ambient 
temp sensor cable 
from fan, preserving 
black tape for reuse.
Reassembly Note:  
Ambient temp sensor 
must extend exactly 1cm 
from plastic retaining ring 
on fan so that it will sit the 
proper distance from rear 
housing when installed.
Incorrect sensor 
placement can lead to 
false temperature readings 
and unusual fan behavior.
Reassembly Note:
Ensure fan fits securely 
into foam on rear housing 
for a snug fit.  Air leaks...

Page 87

LED Cinema Display (27-inch) Take Apart — Ambient Temp Sensor Cable 87 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
•  Fan
Removal
1 
Remove ambient 
temp sensor cable 
from fan, preserving 
black tape for reuse.
Reassembly Note:  
Ambient temp sensor 
must extend exactly 1cm 
from plastic retaining ring 
on fan so that it will sit the 
proper distance from rear 
housing when installed.
Incorrect sensor 
placement can lead to 
false temperature readings 
and unusual fan behavior.
Ambient...

Page 88

LED Cinema Display (27-inch) Take Apart — Logic Board 88 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
 
Warning: HIGH VOLTAGE: 
Use extreme caution 
when working around 
the logic board if unit is 
plugged in. 
Important: When 
replacing the LCD Panel, 
use the EDID Reset Tool.
Tools
•  ESD wrist strap
•  Torx T10 screwdriver
Logic Board  

Page 89

LED Cinema Display (27-inch) Take Apart — Logic Board 89 2010-11-18
Removal
1 
Remove T10 screws: 
(5) 922-9348 
 
 
(top left screw was 
removed with LCD 
ground cable)
2 Disconnect USB uplink 
cable (part of all-in-
one cable) from right 
side of logic board
Reassembly Note:  
Make sure USB uplink 
cable rests against foam 
gasket on top left side 
of right speaker, to avoid 
vibration noise.  

Page 90

LED Cinema Display (27-inch) Take Apart — Logic Board 90 2010-11-18
3 Flip logic board over 
and disconnect 
remaining cables.
Note: See next page for 
a map of logic board 
connectors.
Reassembly Notes:
•  Connect 8 cables with 
reverse side of MLB 
facing you, then flip 
board into regular 
position and connect 
USB uplink cable.
•  Avoid trapping 
DisplayPort cable 
underneath other 
cables to left of logic 
board. DisplayPort 
cable needs slack 
in order to be 
reconnected to LCD.
•  For proper USB...
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