Apple led cinema display 27inch User Manual

LED Cinema Display (27-inch) Take Apart — LCD Temp Sensor Cable 71 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
Note: A new LCD panel 
includes a new temp 
sensor cable.
Tools
•  ESD wrist strap
LCD Temp Sensor Cable  

LED Cinema Display (27-inch) Take Apart — LCD Temp Sensor Cable 72 2010-11-18
Removal
1 
Note cable routing 
and placement of 
tape securing cable to 
LCD panel.
2 Peel back mylar at top 
rear of LCD panel.
3 Pull cable straight out 
of connector.
4 Peel back foam gasket 
covering sensor at 
bottom rear of LCD 
panel.
Replacement Note:
Fully cover sensor with 
gasket to isolate from 
internal air temperature.
5 Remove cable from 
LCD panel.  

LED Cinema Display (27-inch) Take Apart — LCD Ground Cable 73 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
Note: A new LCD panel 
does not include a new 
ground cable; it must be 
transferred from old LCD 
panel.
Tools
•  ESD wrist strap
•  Phillips #0 screwdriver
LCD Ground Cable  

LED Cinema Display (27-inch) Take Apart — LCD Ground Cable 74 2010-11-18
Removal
1 
Remove Phillips #0 
screw: 
(1) 922-9724 
2 Remove cable from 
LCD panel.  

LED Cinema Display (27-inch) Take Apart — Camera 75 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
Important: The camera 
assembly contains an 
ambient light sensor. 
When replacing camera, 
use the EEPROM Reset 
Tool to reset the ambient 
light sensor’s calibration 
factor.
Tools
•  ESD wrist strap
•  Torx T10 screwdriver
•  Black stick
Camera  

LED Cinema Display (27-inch) Take Apart — Camera 76 2010-11-18
Removal
1 
Remove T10 screws: 
(2) 922-9723 
 
2 Lift camera out of rear 
housing.
3 Disconnect cable from 
camera.
Reassembly Note: 
Thermal paste is required 
between camera and rear 
housing.
Use a black stick to 
remove thermal paste 
from old camera and 
reapply to new camera 
(areas circled).  
 
Note: A syringe of 
thermal paste is available 
as needed, Apple part# 
922- 9625, good for 5 
applications.  

LED Cinema Display (27-inch) Take Apart — Camera 77 2010-11-18
EEPROM Reset Tool
After replacing the camera in an LED Cinema Display (27-inch), run the EEPROM Reset Tool to reset 
the Ambient Light Sensor (ALS) calibration factor. This tool should only be run when the camera 
has been replaced.
1.  Download the EEPROM Reset Tool from Service Source, by navigating the Product Browser to 
“Displays” and then to “LED Cinema Display (27-inch).”
2.  Launch the EEPROM Reset Tool on a host computer that is...

LED Cinema Display (27-inch) Take Apart — Camera 78 2010-11-18
4. If the camera has been replaced, choose “Yes”. The Ambient Light Sensor (ALS) EEPROM 
calibration factor will be reset and the following message will appear:
5.   Unplug the display’s power cord from AC outlet, wait at least 10 seconds, and then reconnect 
to AC power in order to cycle the unit. The window above should re-appear on the screen.
6.  Select the “Compare EEPROM default” button. The response should be:
7.  The reset process is...

LED Cinema Display (27-inch) Take Apart — Camera Cable 79 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
•  Camera
Removal
1 
Note cable routing 
through black plastic 
guides in rear housing, 
and tape securing 
camera cable to rear 
housing.
2 Disconnect cable from 
camera and from logic 
board.
Reassembly Note:  
For easier access to 
reconnect cables, unscrew 
and flip over logic board.
Camera Cable  

LED Cinema Display (27-inch) Take Apart — Power Supply 80 2010-11-18
First Steps
Remove:
• Glass Panel
•  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 unit is 
unplugged.  Never touch 
leads on top side of power 
supply, especially those 
near warning sign.
Tools
•  ESD wrist strap
•  Torx T10 screwdriver
Power Supply