Memory

Installing Ram

Note The memory is located behind the user access panel shown below. 1. Save open documents and quit all open applications. 2. Turn the computer off by choosing Shut down from the Special menu (Mac OS 9) or by choosing Shut down from the Apple menu (OS X). 3. Unplug all cables, except the power cord, from the computer. Warning If the internal modem is connected to a telephone line, disconnect the telephone line from the internal modem port before you open the user access door. This prevent...

Service Source

Important The display analog assembly contains a non-switching power supply preset at a 220V configuration. The voltage selection needs to be manually set by the way of a voltage jumper. If you are operating the computer in a 110V environment, you will have to install the voltage jumper. 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...

Apple Mac Repair

Apple Mac Repair

With the digital module facing you, remove the four screws on the left side of the digital 2. Next, remove the three screws on the right side. 2. Next, remove the three screws on the right side. 3. On the top right side of the digital module, remove one screw. 3. On the top right side of the digital module, remove one screw. 5. Remove one screw on the I O panel and disconnect the video cable located above the screw. Squeeze the tabs to disconnect the video cable. 5. Remove one screw on the I O...

LHR Coil

Apple Mac Repair

This procedure requires the following tools Phillips 2 screwdriver Note This part is used in Europe for line conditioning. If your computer does not have the LHR, skip this procedure. Place the computer face down on an ESD mat. Remove the user access door. 1. Remove the screw located at the bottom of the LHR module. 2. Disconnect the LHR connector located next to the fuse and to the right of the fan. 2. Disconnect the LHR connector located next to the fuse and to the right of the fan. 3....

Procedure

With a screwdriver, pry the heatsink clip out of the hole on the logic board. 2. Lift the heatsink off the logic board. Replacement Note 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 the next topic, Thermal Paste Application. The microprocessor...

CRT Discharge

Anode Aperture

Warning This product contains high voltage and a high-vacuum picture tube. To prevent injury, always review the Service Foundations CRT Displays course for safety information. It can be found at Click on Desktop Certification Courses and select the Service Foundations CRT Displays link. Warning Never use a grounding wriststrap until after discharging the CRT and setting up an ongoing ground connection. Whenever the rear housing of the computer is removed and before replacing a module, you must...

Powerbook Logic Board

The Dimm Voltage Jumpers Ram

Audio in pul Atk FireWire lO l ttAS T Ethernet. The PMU Power Management Unit is a micro controller chip that controls all power functions for the computer. The PMU is a computer within a computer. It has memory, software, firmware, I O, two crystals, and a CPU. Its function is to Tell the computer to turn on, turn off, sleep, wake, idle, etc. Manage system resets from various commands. Maintain parameter RAM PRAM . Manage the real-time clock. Important The PMU is very sensitive and touching...

Emac Speaker Covers

Emac Logic Board

Save open documents and quit open applications. 2. If you have the keyboard, press the Media Eject key on the keyboard to open the access door. Note If you don t have access to the customer s keyboard, carefully pry the door open with a flatblade screwdriver. Be careful not to scratch the door or bezel. 4. Turn the computer off by choosing Shut down from the Special menu Mac OS 9 or by choosing Shut down from the Apple menu OS X . 5. Loosen the captive screws on the AirPort access panel...