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Apple power mac g4 digital audio User Manual

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     Take ApartProcessor Module, PCI Graphics  -   39 
    Processor Module, PCI 
    Graphics 
    Before you begin, open the 
    side access panel. 
    Note: 
     The Power Mac G4 
    (PCI Graphics) processor 
    requires a jumper installed 
    at J25 on the logic board.  
    						
    							 
     Take ApartProcessor Module, PCI Graphics  -   40 
    1. Remove the screw that 
    attaches the heatsink 
    ground wire to the logic 
    board.  
    ±
     
    Warning: 
      The heatsink 
    may be hot to the touch. If 
    the computer has been 
    operating, allow it to cool 
    down before continuing.
    2. While pressing down on 
    the top of the heatsink 
    clip, use a small 
    flatblade screwdriver to 
    release the clip by 
    lifting up and out on its 
    center front tab. 
    						
    							 
     Take ApartProcessor Module, PCI Graphics  -   41 
    3. Remove the heatsink clip 
    and lift the heatsink off 
    the processor module. 
    4. Lift the lever to release 
    the processor module. 
    						
    							 
     Take ApartProcessor Module, PCI Graphics  -   42 
    5. Holding the processor by 
    the edges, gently lift it 
    straight up to disconnect 
    it from the logic board.  
    Caution: 
     Be careful not 
    to bend the pins under-
    neath the module. 
    Important: 
      If you are only 
    replacing the processor 
    module, stop here. If, 
    however, you are removing 
    the processor module to 
    replace the logic board, 
    continue with the next page. 
    						
    							 
     Take ApartProcessor Module, PCI Graphics  -   43 
    6. Remove the warranty 
    sticker and jumper 
    block only if you are 
    replacing the logic 
    board.
    White jumper: 400 MHz
    Blue jumper: 350 MHz 
    Caution: 
     When removing the 
    jumper, be sure not to leave 
    its inner metal clips on the 
    old jumper connector. If the 
    clips are left behind, install 
    a new jumper on the new 
    board. If you use a jumper 
    without clips, or improper-
    ly install the jumper, the 
    unit could fail to start up. 
    						
    							 
     Take ApartProcessor Module, PCI Graphics  -   44
    7. Install the jumper block 
    with the gold connector 
    pins facing toward the 
    board. Be sure the pins 
    are covered as shown.
    Processor
    Jumper 
    Block400 MHz
    White350 MHz
    Blue 
    						
    							 Take ApartProcessor Module, PCI Graphics  -   45
    Replacement Note: Position 
    the processor module over 
    the slot, seat it evenly, and 
    press down gently on the 
    module to install it. If you 
    are installing a new 
    processor, install a gap 
    filler on it as illustrated. 
    Caution: On modules with 
    capacitors, make sure all 
    capacitors show through the 
    opening in the gap filler. 
    						
    							 Take ApartProcessor Module, PCI Graphics  -   46
    Important: If you are 
    replacing the processor 
    module, you must also 
    transfer the replacement 
    moduleÕs connector cover to 
    the connector on the original 
    module before returning it 
    to Apple. Make sure the hole 
    in the cover aligns with pin 
    one (marked by a white V) 
    on the connector.  
    						
    							 Take ApartLogic Board, Power Mac G4 (QuickSilvers)  -   47
    Logic Board, Power 
    Mac G4 (QuickSilvers)
    Before you begin, open the 
    side access panel and remove 
    the following:
    ¥ video card
    ¥ processor fan
    ¥ processor module
    ¥ PCI cards (if present)
    ¥ modem (if present)
    ¥ AirPort card (if present)
    ±Warning:  Be sure to 
    reinstall the heatsink after 
    completing this procedure. 
    Operating the computer 
    without the heatsink in place  
    						
    							 Take ApartLogic Board, Power Mac G4 (QuickSilvers)  -   48
    will destroy the processor. 
    1. Disconnect all cables 
    from the logic board.
    2. Using a Phillips 
    screwdriver, remove 
    the four logic board 
    mounting screws.
    3. Remove the three 
    processor module 
    standoffs. 
    						
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