Tài liệu LED Cinema Display (24-inch) pptx

LINK DOWNLOAD MIỄN PHÍ TÀI LIỆU "Tài liệu LED Cinema Display (24-inch) pptx": http://123doc.vn/document/1054817-tai-lieu-led-cinema-display-24-inch-pptx.htm

Power Supply 59
Blower 61
Removal 62
Replacement 63
Camera 64
Subwoofer 66
AC Inlet 68
All-in-One Cable 70
Speakers 72
Removal 73
Replacement 73
Stand 74
Mechanism 77
Rear Housing 79
Additional Procedures
VESA Mount 81
Retrieving Mechanism 84
Views
Exploded View 89
Cable Routing Diagram 90
Photo of Interior 91
Screw Chart 92
© 2010 Apple Inc. All rights reserved.
 Apple Technician Guide
About This Manual
LED Cinema Display (24-inch)
LED Cinema Display (24-inch) — Updates 7
2010-02-08
Updates
Updated 8 February 2010
Troubleshooting: General: Test Points Diagram, added TP61•
Troubleshooting: Symptom Charts: “Dead Unit / No Power”:•
Step 5: changed “Yes” Action to lead to Blank/No Video, • Step 3;
Step 8, corrected voltage for TP11 to 24.5VDC (was incorrectly noted as 15VDC); •
Step 9, corrected “TP11” to “TP13”.•
Troubleshooting: Symptom Charts: “Camera Issues”: added link to • kBase #HT3957: “About
the LED Cinema Display iSight Camera Firmware Update 1.0”.
Updated 28 October 2009
Added new section: About This Manual•
Basics: replaced Technical Specications (p. 9) with a link to AppleCare Tech Specs•
Troubleshooting: General: updated Troubleshooting Theory section•
Troubleshooting: Symptom Charts: corrected hyperlink at top of p. 17•
Take Apart: General: replaced ESD section with hyperlinks to current ESD articles & training; •
added section for handling and removing a broken glass panel
Take Apart: Stand: added image showing removal of rear housing from stand; added note •
about VESA Mount procedure
Added new sections: Additional Procedures: VESA Mount and Retrieving Mechanism•
Updated 2 December 2008
Feedback
We want your feedback to help improve this and future Technician Guides!
Please email any comments to: smfeedback6@apple.com
© 2010 Apple Inc. All rights reserved.
 Apple Technician Guide
Basics
LED Cinema Display (24-inch)
LED Cinema Display (24-inch) Basics — Overview 9
2010-02-08
Overview
Identifying Features
The LED Cinema Display (24-inch) is an active-matrix LCD with LED backlight that includes a
built-in iSight camera, a 2.1 speaker system, and a microphone. The native resolution is 1920 x
1200 pixels. The all-in-one cable creates a docking station for portable computers, providing a
MagSafe power connection, Mini DisplayPort video connection, and a 3-port USB hub.
The unit has no buttons. Power is controlled by the state of the connected computer. It is
OFF if it detects the DisplayPort source is powered o. It is in Sleep if it detects the DisplayPort
source is powered but does not send a video signal (i.e., Display Sleep). It is ON when the
DisplayPort source sends a valid video signal. Brightness and speaker volume are controlled via
System Preferences in the Mac OS.
System Requirements
The LED Cinema Display (24-inch) works with Mac computers running Mac OS X 10.5 or later
that have a high-performance Mini DisplayPort.
Product Congurations
For product congurations, refer to AppleCare Tech Specs: http://support.apple.com/specs/
LED Cinema Display (24-inch) Basics — Overview 10
2010-02-08
Rear View
The stand is removable in
order to allow the use of a
VESA mount.
Ports
The 3-port USB 2.0 hub
can power three ports at
1.1A each, or up to two
ports at 1.5A each.
All-In-One Cable
Includes (left to right):
USB, Mini DisplayPort, and
MagSafe power.
LED Cinema Display (24-inch) Basics — Serial Number Location 11
2010-02-08
Serial Number Location
Serial Number on Stand
The LED Cinema Display (24-inch)’s serial number is located on the base of the stand. When
replacing a stand, transfer the serial number to the new stand.
Serial Number on Mechanism
The LED Cinema Display (24-inch)’s serial number is also located on the hinge mechanism
inside, for users who remove the stand to use a VESA mount. When replacing a mechanism,
transfer the serial number label to the new mechanism.
© 2010 Apple Inc. All rights reserved.
 Apple Technician Guide
Troubleshooting
LED Cinema Display (24-inch)
LED Cinema Display (24-inch) Troubleshooting — General Troubleshooting 13
2010-02-08
General Troubleshooting
Troubleshooting Theory
For general information on troubleshooting theory, go to GSX and nd the Service Training
course menu link. From there you can access the Troubleshooting Theory self-paced course.
Hardware vs. Software
For information on how to isolate a hardware issue from a software issue, refer to:
kBase #TS1388: Isolating issues in Mac OS X
For information on how to troubleshoot a software issue, refer to:
kBase #HT1199: Mac OS X: How to troubleshoot a software issue
LED Cinema Display (24-inch) Troubleshooting — General Troubleshooting 14
2010-02-08
Functional Overview
A guide to possible symptoms as they relate to ports on the main logic board:
LCD Function Interface
• No power to LCD
• No LED backlight
DC In
• No power
Camera
• Not detected in USB Device Tree
• No green camera LED
• No camera video
Fan (1) & LCD (2) Temp Sensors
• Fan runs fast if sensor is:
° disconnected
° connected to wrong location on MLB
° not properly mounted or located
° faulty
Microphone
• Not detected in Sound Pref pane
• No, low, distorted audio input
Subwoofer
• No, low, distorted bass
Right & Left Speakers
• Not detected in Sound Pref pane
• No, low, distorted channel(s)
Blower (Fan)
• No rotation leading to overtemp condition
• Excessive noise/vibration due to faulty fan
* Also see Fan (1) & LCD (2) Temp Sensors
symptoms below.
LED Driver (Backlight)
• No LED backlight
• Dim or low brightness
Upstream USB
• Not detected in USB Device Tree or
System Preference panes
° iSight camera
° Sound output
° Microphone input
° LED calibration &
brightness control
° 3 x USB ports