Power Controller

The PowerBook G4 computer can operate from a 15 volt power outlet on an airline, but for safety reasons, the computer will not allow battery charging. In order for the computer to detect the connection to airline power, the airline power cable should have a sense resistor of 24.3K ohms connected between the power plug's shell and ground. The PowerBook G4 computer has a new variable speed fan control circuit and a new thermal circuit that will force the unit to sleep if the processor temperature...

Fire Wire Connector

The FireWire connector has six contacts, as shown in Figure 3-2. The connector pin assignments are shown in Table 3-2. Table 3-2 Pin assignments on the FireWire connector Ground return for power and inner cable shield Twisted-pair B, differential signals Twisted-pair B, differential signals Twisted-pair A, differential signals Twisted-pair A, differential signals When the computer is on or the power adapter is connected, the power pin provides a maximum voltage of 17 V no load and up to 6 W...

Appearance

Figure 1-1 is a front view of the PowerBook G4 computer. Figure 1-2 is a back view showing the I O ports. Figure 1-1 Front view of the computer Figure 1-1 Front view of the computer Apple Computer, Inc. November 2002 Figure 1-2 Back view showing I O ports Figure 1-2 Back view showing I O ports

Keyboard Illustrations

Apple Powerbook Kebord Layout

Figure 3-5 shows the actual appearance of the keyboard. Figure 3-6 shows the alternate modes of operation of the function and control keys. Figure 3-7 shows the embedded numeric keypad. Figure 3-6 and Figure 3-7 include duplicate versions of some keys in order to show their alternate modes of operation. In some cases, the alternate key captions shown in the figures do not appear on the keyboard. For the actual appearance of the keyboard, refer to Figure 3-5. Figure 3-6 Alternate operations of...