Apple studio display 15 lcd adc User Manual

							28  Studio Display 15” (ADC) Take Apart
 LCD Display 3. Separate the metal chassis and black plastic panel cradle to access the backlight 
cables. Pull the bulb cables through the openings in the plastic cradle.   
4. Set the metal chassis and plastic cradle aside. 
						

							 Studio Display 15” LCD (ADC) Take Apart - 29
 Bulbs and Bulb Shield
Bulbs and Bulb Shield 
Tools
This procedure requires the following tools:
• Jeweler’s screwdriver 
Part Location
Preliminary Steps
Before you begin, do the following:
• Place the computer face down on an ESD mat
• Remove the foot assembly.
• Remove the back cover and the inner rear cover.
• Remove the rear shield.
• Remove the horizontal and vertical clips
• Disconnect the touch switches.
• Remove the LCD panel 
						

							30  Studio Display 15” (ADC) Take Apart
 Bulbs and Bulb Shield
Procedure
1. Carefully remove the bulb shield from the panel. There are two tabs (located near the 
arrows below) that hold the shield in place. Replacement Note:  When replacing the 
shield be very careful not to pinch the bulb wires on the shield. 
						

							 Studio Display 15” LCD (ADC) Take Apart - 31
 Bulbs and Bulb Shield2.Note: This procedure shows removing both bulbs. Remove the screw (for each bulb) 
on the back side of the panel. Carefully unhook the bulb cables that are routed 
through the tab holders Important: The bulbs are very delicate and will break if 
excessive force is applied to the bulb tray.
3. Turn the panel over. Remove the screw (for each bulb) on the top side of the LCD 
panel. Replacement Note:  Short screws go on the top side, long screws on the back. 
						

							32  Studio Display 15” (ADC) Take Apart
 Bulbs and Bulb Shield 4. Carefully remove the bulb(s) from the panel. Note: Don’t touch the bulb. 
						

							 Studio Display 15” LCD (ADC) Take Apart - 33
 Bulbs and Bulb Shield 
						

							© 2002 Apple Computer, Inc. All rights reserved.
 Service Source
Troubleshooting
Studio Display 15” LCD (ADC) 
						

							Studio Display 15” LCD ( ADC)  - 1
 General Information
General Information
1.ADC Connector and Bent Pins: Always check for bent pins on the ADC connector and/or the video 
card before replacing service parts. A damaged ADC connector on the display will ruin any video card it’s 
plugged into (and vice versa). It’s important to isolate and repair damaged connectors quickly or risk 
damaging every display and video card.
2.Touch switches: The touch switch kit (076-0891) shown below consists of a replacement main board, 
two touch switches, and touch switch cables. The touch switch kit should only be installed when the 
customer reports that the display starts up and/ or shuts down intermittently when wireless devices are 
used in close proximity. The kit also provides users with the ability to disable the touch switches to 
prevent false activation. The instructions for disabling the touch switches can be found in Knowledge 
Base article 58813.  
						

							2 - Studio Display 15” LCD ( ADC)   Troubleshooting
General Information
Most displays already have the touch switch kit features built in to the display so the touch 
switch kit is not necessary. However, 
to determine whether the kit is required, follow the steps 
below taken from Knowledge Base article 58813. 
1. With the system booted and the Studio Display 15 attached, press and hold down the Command 
and Shift keys, and continue to hold them down while you complete Step 2.
2. Touch the launch button on the left side of the display to open the Displays pane of System 
Preferences. (You may also open the System Preferences from the Apple menu.)
3. Release the Command and Shift keys.
4. With the Display’s system preferences panel open, click the Options tab. Note: If the “Options” tab 
appears, then the touch switch kit is already present. If the Options tab does not appear, and the 
display is experiencing problems working in close proximity to some wireless devices, the touch 
switch kit can be installed if necessary. 
						

							Studio Display 15” LCD ( ADC)  - 3
 General Information 3.Main Board Identification: If the main pcb board shows Rev 1.4 (shown below) on the PCB silkscreen 
then the touch switch kit features are already present. Note: Do not use the V1.0 information printed on 
the large IC’s sticker to identify the board revision; use only the PCB silkscreen number. 
4.Error codes: The Studio Display 15 will flash a repeating error code on the power LED if it detects a 
backlight fault. The error code consists of two short flashes followed by a long flash, a pause, and then 
the error repeats. When this error condition occurs, the problem could be bad bulbs, disconnected cable, 
or a bad inverter. Test the bulbs by pulling them out of the display and plugging them directly into the 
inverter. If they light, the bulbs are good. If they don’t light, try a known good bulb and try again. If the 
bulb still doesn’t light, replace the inverter. Warning:  The inverter board generates high voltage when 
the display is plugged in. Do not touch the inverter board components, pins or connectors, when the 
display is connected to the computer.