Logic Board Diagram

The graphic on the following page illustrates the connectors on the Power Macintosh 9500 Series logic board. Note The board ships with 4 MB of ROM, which may either be soldered or installed as a ROM SIMM. External-SCSI AAUI Ethernet 10BASE-T Ethernet Printer -Modem Cuda Reset ADB Sound In Out

Multi Processor Support

The Power Macintosh 9500 180MP features two 180 MHz PowerPC 604e chips on its microprocessor card. This computer provides extremely rapid performance for applications that can take advantage of its coprocessing capabilities. The Power Macintosh 9500 Series computers offer a Peripheral Component Interconnect PCI expansion bus. Because the PCI bus is an industry standard, most existing PCI 2.0-compliant cards with the addition of a Mac OS-specific software driver will work in the Power Macintosh...

Power Supply

Before you begin, remove the top housing. Note As you face the computer, the power supply is located in the back of the chassis, directly beneath the speaker. Power Supply Cable Power Supply Cable Power Supply Cable Power Supply Cable 1 Disconnect the two cables that run from the power supply to the logic board. Note The 10-pin power supply cable the cable on the left in the graphic supplies 3.3 V power for the processor card. The 22-pin cable the cable on the right in the graphic supplies 5 V...

Rear View Diagram

The Power Macintosh 9500 Series computers offer the following external ports SCSI, AAUI Ethernet, 10BASE-T Ethernet, serial printer GeoPort compatible , serial modem GeoPort compatible , ADB, sound input, and sound output. Some configurations of the Power Macintosh 9500 also includes a DB-15 video port on the Apple Accelerated Graphics card, which installs in one of the PCI slots on the logic board. The drawing on the next page illustrates the rear panel on the Power Macintosh 9500 Series...

Resetting the Logic Board

Resetting the logic board can resolve many system problems refer to Symptom Charts for examples . Whenever you have a unit that fails to power up, you should follow this procedure before replacing any modules. 2 Remove the logic board. Refer to the Take Apart chapter for instructions on how to remove the logic board. 3 Using a small flat-blade screwdriver, pry open the latch at the end of the battery holder and lift off the battery holder cover. 4 Remove the battery from its holder. 5 Verify...

The Cuda Chip

Its function is to Turn system power on and off Manage system resets from various commands Maintain parameter RAM PRAM Manage the Apple Desktop Bus ADB Many system problems can be resolved by resetting the Cuda chip see Symptom Charts for examples . Press the red Cuda reset button on the logic board to reset the Cuda chip. See Logic Board Diagram later in this chapter to locate the Cuda reset button. If you continue to experience system problems, refer to...