Apple emac ati usb2 2005 Manual Do Serviço

eMac ATI Graphics /USB 2.0/2005  Troubleshooting - 7

 General Information

cannot be addressed in updates to software. On earlier computers, the programmer's switch 
was used to install a firmware update. 

Follow these steps in the event that a firmware update is needed for these computers: 

1. Shut down the computer. 

2. Wait until the computer is shut down and the power button light is off. 

3. Press and hold the power button for several seconds. 

4. The computer will signal that a firmware update is ready to be installed by a making a 
steady tone and the power button light will quickly flash several times for several seconds. 

1.

Important:  The display/analog (service module) contains a non-switching power supply which is preset 

at a 220V configuration. The voltage selection is manually set by way of a voltage jumper. This means if 

you are replacing the display/analog assembly and you will be operating the computer in a 110V 

environment, you will have to install the voltage jumper on the replacement module. Refer to the inbox 

instruction included with the display/analog service module, or refer to “Display/Analog Voltage Setting 

and LHR Module Instructions” discussed later in this chapter.

 Note:  The LHR coil (line conditioning module) is used in some international countries. Refer to the Take 

Apart chapter, LHR topic, for take-apart information.

2.

Important: If you are returning a defective display/analog assembly, it is imperative that proper 

packaging guidelines be followed. The packing procedure is included with the replacement assembly. 

Incorrect packaging can result in damaged eMac displays. Please read and follow the directions 

enclosed in the shipping box of the new display prior to packaging the defective module.Failure to 

package the defective module according to the instructions may result in liability for the cost of the 

damaged display. 

3.

Important: Do NOT lift, handle, bump, or manipulate the CRT neck/neck board on the Display/Analog 

assembly. Modules damaged by mishandling are NOT covered by Apple Warranty. Apple Authorized 

Service Providers can be liable for broken CRT necks due to improper handling. Refer to “CRT Neck/

Display/Analog Assembly Handling Information” topic in this chapter for more information.

4.

The eMac (ATI Graphics) display/analog assembly requires no voltage calibration or geometry 

adjustment. Should the display appear to require adjustment (color or brightness) use the “Displays” 

pane under System Preferences if using Mac OS X. If using Mac OS 9, use the Monitor Control Panel. If 

you can not make satisfactory corrections with these tools, replace the display/analog assembly.

5.

Important: The microprocessor uses a heatsink/thermal pipe to transfer heat away. Whenever the 

heatsink is removed, the bottom side of the heatsink and the top of the microprocessor must be cleaned 

and thermal paste must be applied to the microprocessor. If the mating surfaces are not cleaned and 

thermal paste is not applied, the CPU may overheat and become damaged. Refer to “Thermal Paste 

Application” in this chapter.