Apple powerbook g4 12 inch 1 5ghz User Manual

							PowerBook G4 (12-inch 1.5 GHz) Take Apart - 49
 DC-to-DC Board
DC-to-DC Board
Tools
This procedure requires the following tools:
• #0 Phillips screwdriver (magnetized preferred)
• Black stick (or other nonconductive nylon or plastic flat-blade tool)
• 4 mm socket wrench or needlenose pliers
Note:  To organize the screws you remove from the computer, use a tray with divided 
compartments (such as a plastic ice cube tray).
Part Location 
						

							50 - PowerBook G4 (12-inch 1.5 GHz) Take Apart
 DC-to-DC Board
Preliminary Steps
Before you begin, remove the following:
• Battery
• Memory door and memory card
• Keyboard
• Top case
• Hard drive
Procedure
1. Disconnect the sleep light cable and the hall effect sensor board cable from the DC-to-
DC board. 
						

							PowerBook G4 (12-inch 1.5 GHz) Take Apart - 51
 DC-to-DC Board 2. Remove the screws from the DC-to-DC board.
Note:
 When removing the 4.5-mm long screw, the magnetic latch might draw the 
screw toward it. The 13.5-mm long screw has a hex head and requires a ne\
edlenose 
pliers or socket wrench to remove it.
Replacement Note:
 When replacing the DC-to-DC board, install the screws in the 
order shown.
3. Lift off the EMI strip from the battery connector. Be sure to replace it when installing  the replacement DC-to-DC board. 
						

							52 - PowerBook G4 (12-inch 1.5 GHz) Take Apart
 DC-to-DC Board
4. Place a black stick just under the top edge of the board. Do not lean the black stick on 
the modem board or optical drive. Disconnect the DC-to-DC board from the logic 
board by prying up the DC-to-DC board and removing it from the computer assembly.
5. Install the replacement DC-to-DC board, and reassemble and test the computer. 
						

							PowerBook G4 (12-inch 1.5 GHz) Take Apart - 53
 Heatsink and Fan Assembly
Heatsink and Fan Assembly
Tools
This procedure requires the following tools:
• #0 Phillips screwdriver 
• #1 Phillips screwdriver
• Black stick (or other nonconductive nylon or plastic flat-blade tool) \
Note:  To organize the screws you remove from the computer, use a tray with divided 
compartments (such as a plastic ice cube tray).
Part Location
Preliminary Steps
Before you begin, remove the following:
• Battery
• Memory door and memory card 
• Keyboard
• Top case 
						

							54 - PowerBook G4 (12-inch 1.5 GHz) Take Apart
 Heatsink and Fan Assembly
Procedure
1.Warning:  The cone of the subwoofer, located below the heatsink and to the right of 
the fan, is a sensitive device. Avoid touching the subwoofer cone as you perform this 
procedure.
2. If tape covers any of the following screws, peel up the tape. Remove the following  screws from the heatsink:
• Three 6-mm long #0 Phillips screws
• Two 7.5-mm long #1 Phillips screws with springs
• One 12.5-mm long #0 Phillips screw
• One 4.5-mm long #0 Phillips screw 
						

							PowerBook G4 (12-inch 1.5 GHz) Take Apart - 55
 Heatsink and Fan Assembly 3. Remove the tape, if provided, that covers the heatsink and secures the cables in 
place.
4. Near the fan, peel up the tape and remove the following screws: • One 3-mm long screw
• One 12-mm long screw
Replacement Note:
 When reapplying tape around the fan, make sure the fan 
blades are not blocked. The image below shows the correct application of\
 tape.
5. Disconnect the inverter cable that runs along the top of the fan.
Replacement Note:
 When reconnecting the inverter cable, make sure it is 
routed in the channel above the fan and behind the cable guide, as shown\
.
6. Disconnect the fan cable. 
						

							56 - PowerBook G4 (12-inch 1.5 GHz) Take Apart
 Heatsink and Fan Assembly
7. Holding the heatsink plate, begin to lift up the heatsink assembly, being careful where 
it catches on remaining tape and the chassis. Use a black stick to pry up the middle 
right corner of the heatsink plate.
Warning:
 To avoid bending the heatsink, support the heatsink as it is removed. 
8. Note the placement of the thermal pads. Make sure you replace the thermal pads whenever the heatsink is removed or replaced.  
						

							PowerBook G4 (12-inch 1.5 GHz) Take Apart - 57
 Heatsink and Fan Assembly 9. Note the correct routing of the cables when the heatsink is installed.
.
10. Install the replacement heatsink, and reassemble and test the computer. 
						

							58 - PowerBook G4 (12-inch 1.5 GHz) Take Apart
 Inner Frame
Inner Frame
Tools
This procedure requires the following tools:
• #0 Phillips screwdriver 
• Black stick (or other nonconductive nylon or plastic flat-blade tool) \
Note: To organize the screws you remove from the computer, use a tray with divided 
compartments (such as a plastic ice cube tray).
Part Location
Preliminary Steps
Before you begin, remove the following:
• Battery
• Memory door and memory card
• Keyboard
• Top case