Apple LED Cinema Display Technician Manual
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Apple LED Cinema Display, LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 19 2010-02-08 Disconnect all connectors from 9. the logic board EXCEPT the power supply cable. Verify voltages on logic board between test points TP61 (3.3VDC) and chassis ground (GND) is 3.1–3.5 VDC, and between TP13 (12VDC) and chassis ground (GND) is 11.4–12.6 VDC. Yes Power supply OK. Suspect possible short, damaged connector, or faulty sensor/ fan/speaker. Reconnect connectors one at a time and retest for 3.3VDC at TP61 and 12VDC at TP13. Replace aected part that causes the 3.3VDC or 12VDC voltages to disappear. L14 No Replace logic board. L01 Bu
Apple LED Cinema Display, LED Cinema Display (24-inch) Take Apart — General Information 43 2010-02-08 Cleaning Tools Starter Kit The following tools are oered in the cleaning starter kit (076-1277): Suction cups, 1 pair• Gloves, lint-free, anti-static, 2 pairs• Sticky silicone roller (6-inch) to clean the glass panel• Sticky sheets to clean the silicone roller, 2 pads• Polishing cloths, clean, anti-static, optical-grade micro-ber “terry” style, 5 cloths• Microfoam bag to store the glass panel, 5 bags• ESD bag for LCD pane
LED Cinema Display (24-inch) Take Apart — Stand 76 2010-02-08 Replacement Reassembly is an exact reversal of the steps. Note: Slide rear housing over stand, aligning pin on mechanism with center hole on stand. Replacement Note: If replacing stand, transfer serial number to new part.
Apple LED Cinema Display, LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 20 2010-02-08 MagSafe Adapter – No Power Unlikely cause: LCD panel, logic board, blower, subwoofer, speakers, camera, microphone Quick Check Symptoms Quick Check MagSafe Adapter – No Power No power to MagSafe • connector MagSafe connector status LED • does not illuminate No power to portable • computer without battery Verify power source. 1. Verify display is operating.2. Ensure MagSafe connector and receptacle are 3. clean. Verify LED glowing amber or green when 4. MagS
LED Cinema Display (24-inch) Take Apart — Glass Panel 46 2010-02-08 First Steps Shut down unit.• Wait 10 minutes.• Unplug all cables.• 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
LED Cinema Display (24-inch) Take Apart — LCD Panel 52 2010-02-08 Removal Remove 6 screws: 1 T10, 922-8685 Raise bottom edge of 2 LCD a few inches using mylar tabs. Careful! There are 4 cables to disconnect in next step.
Apple LED Cinema Display, LED Cinema Display (24-inch) Take Apart — Mechanism 77 2010-02-08 First Steps Remove: Glass Panel• LCD Panel• Subwoofer• Stand• Tools ESD wrist strap• Torx T10 screwdriver• Mechanism
Apple LED Cinema Display, LED Cinema Display (24-inch) Views — Screw Chart 92 2010-02-08 Screw Chart All screws for the LED Cinema Display (24-inch) are Torx 10. 922-8680 Svc, Screw, T10, M3X4L shiny silver color Camera (2) 922-8681 Svc, Screw, T10, M3X5L shiny silver color Subwoofer (4) 922-8682 Svc, Screw, T10, M4X8L shiny silver color Mechanism (4) 922-8683 Svc, Screw, T10, M4X5L shiny silver color AC Inlet ground (1) 922-8684 Svc, Screw, T10, M3X5L shiny silver color Blower (3) 922-8685 Svc, Screw, T10, M3X7L shiny silver color LCD (6), logic board (6), power supply (4), AC Inlet (3),
Apple LED Cinema Display, LED Cinema Display (24-inch) Additional Procedures — Retrieving Mechanism 84 2010-02-08 Overview Without a stand or VESA mount installed, the mechanism can retract inside the computer if an access card trips the latch that locks the mechanism. In the rare event that retrieving the mechanism is necessary, follow this procedure. Tools Access card • (Apple part #922-7172) Retrieval tool • (Apple part #922-7849) Scissors to cut access • card in half Retrieving Mechanism
LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 17 2010-02-08 Symptom Charts Follow steps in the order indicated below. If an action resolves the issue, retest system to verify. Note: A compilation of Quick Check tables is available at: http://service.info.apple.com/QRS/en/quickreference.pdf Startup and Power Issues Dead Unit / No P
Apple LED Cinema Display, Uncategorized Symptoms 22 Display Issues 23 Blank / No Video, No Backlight 23 Noise / Unstable Flicker 24 LCD Image Issues 26 Physical Damage 30 Uncategorized Symptoms 30 Input/Output Issues 31 USB Issues 31 Camera Issues 32 Audio Issues 33 Uncategorized Symptoms 36 Mechanical Issues 37 Noise, Hum or Vibration 37 Fan Failures / Thermal Issues 39 Mechanical Physical Damages 40 Uncategorized Symptoms 40 Take Apart General Information 42 Opening the Unit 42 Required Tools 42 Required Special Tools for Glass Panel 42 Cleaning Tools Starter Kit 43 Cleaning Tool Resources 43 Cleaning & Handling the Glass Panel 43 Do’s and Don’ts 43 Handling a Br
Apple LED Cinema Display, LED Cinema Display (24-inch) Additional Procedures — VESA Mount 83 2010-02-08 Remove 8 screws: 5 T10, 922-8749 Remove stand from 6 mechanism. Reassembly Note: Align pin on mechanism to central hole in stand.
Apple LED Cinema Display, 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 Specica
Apple LED Cinema Display, LED Cinema Display (24-inch) Symptom Charts — Mechanical Issues 37 2010-02-08 Mechanical Issues Noise, Hum or Vibration Unlikely cause: LCD panel, logic board, all-in-one cable, camera Quick Check Symptoms Quick Check Noise, Hum or Vibration Buzzing noise• Rattling noise• Ticking noise• Squeaking• Verify display’s USB and Mini DisplayPort 1. connectors are plugged into known-good supported system. Tilt display to hinge limits to determine if 2. mechanical noise is generated by th
Apple LED Cinema Display, LED Cinema Display (24-inch) Symptom Charts — Input/Output Issues 34 2010-02-08 Launch System Preferences: 3. Sound and select ‘sound output’ options. Verify output option is set to display’s internal speakers. Yes Go to step 6. No Set output to internal speakers. Retest. If needed, replace logic board. L11 Disconnect USB uplink cable 4. from logic board and system. Inspect cable connectors and cable under magnication for pinched cables and damaged or bent pins. Yes Replace all-in-one cable. L14 No Go to step 5. Disconnect USB uplink cable 5. from logic board. Inspect logic board USB connector under magnication for damaged o
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