Diagnostic LEDs
The Mac Pro logic board includes a set of LEDs to help service providers troubleshoot the computer. The LEDs are located toward the rear of the logic board, under the memory cage, next to PCI card slot 1. You can view these LEDs by removing the computer's side access panel and looking through the memory cage to the logic board below. LEDs 2, 3, 4, and 5 are normally off and will automatically illuminate if an error occurs. To read LEDs 1, 6, 7, and 8, you must press the DIAG_LED button, which...
Memory FBDIMMs and Memory Riser Cards
The Mac Pro computer has two memory riser cards with a total of 8 memory slots. On each card, the slots are arranged as two banks of two slots each. The computer comes with a minimum of 1 GB of memory, installed as a pair of 512 MB fully buffered, dual inline memory modules FB-DIMMs in two of the DIMM slots. Additional DIMMs can be installed in the open DIMM slots, as illustrated below. Note DIMMs must be installed in pairs of equal size from the same vendor. In the illustration below, DIMMs in...
Part Location Gms
1. Remove the two AirPort Extreme card mounting screws. 1. Remove the two AirPort Extreme card mounting screws. 2. Lift the AirPort Extreme card a short distance from the logic board. 3. Disconnect the AirPort antenna wires from the card. 4. Remove the card from the enclosure. Replacement Note To replace the AirPort Extreme card, do the following Connect the antenna wires to the card. Important Be sure to connect the wires that are marked 1 and 3 to the card the antenna wire that is marked 2...
Part Location Xav
1. Using a magnetized 2.5 mm hex wrench remove the four power supply mounting screws from the bottom of the media shelf. 2. Depress the upper right corner of the power supply and slide the power supply toward the front of the computer. Note Before beginning the next step, place a soft cloth over the edge of the enclosure to prevent scratches from the power supply. 3. Lift the power supply a short distance and rest it on the edge of the enclosure. Note The power supply is still connected to the...
Exploded View 1
Optical Drive 661-4080 Hard Drive 160 GB 661-3922 250 GB 661-3923 500 GB 661-3924 Hard Drive Carrier 922-7728 Heatsink -076-1233 Bluetooth Card 922-7289 AirPort Extreme Card 661-4060 922-7695 Memory Cage with Fan 922-7679 Graphics Card 661-3932 661-3927 CTO 661-3928 CTO Processor 661-4083 Low 661-3921 Mid 661-4084 High Logic Board 661-3919
Bluetooth card if installed
1. To keep them out of the way, temporarily tape the antenna cables to the bottom of the media shelf. Important Be sure to disconnect all cables from the logic board before you remove the logic board mounting screws. 2. Starting at the back panel side of the logic board and working clockwise around the board, disconnect all cables from the logic board. Note There are 14 cables you will be disconnecting from the logic board. 3. Using a magnetized 1 Phillips screwdriver, remove the eight black...
PowerOn Self Test RAM and Processor Verification
A power-on self test in the computer's ROM automatically runs whenever the computer is started up after being fully shut down the test does not run if the computer is only restarted . If the test detects a problem, the status LED located above the power button on the front of the computer will flash in the following ways 1 Flash No RAM is installed or detected. Or, the quick memory test failed. An LED will light up on the DIMM riser card next to the affected DIMM or empty DIMM slot. 3 Flashes A...
LED CPU B Lower Processor Overtemp LED CPU A Upper Processor Overtemp
Normally off. These LEDs come on if an error occurs. They do not depend on the DIAG_LED button being pressed. These two LEDs can operate in two different modes they will either flash or stay on. If either LED is flashing, it may indicate an initial processor over-temperature condition. If either LED is solidly on, it may indicate a chronic processor over-temperature condition. Initial processor over-temperature can cause symptoms such as sluggish computer performance. Chronic processor...
Mac Pro External Enclosure
1. If you have not already done so, loosen the two captive screws that secure the PCI bracket to the enclosure and remove the bracket. Warning When removing or installing a card, handle it only by the edges. Do not touch its connectors or any of the components on the card. Lift the card straight out from the connector to remove it, and insert it straight into the connector to install it. Do not rock the card from side to side and don't force the card into the slot. Once the replacement card is...
Procedure Cup
1. Using a magnetized 1 Phillips screwdriver, remove the two mounting screws on the hard drive connector for drive bay 1 and move the connector out of the way. 2. Unwind the tape that holds the optical drive data cable to the optical drive power cable. 3. Disconnect the optical drive data cable from the logic board. 4. Insert the cable into the opening in the media shelf at hard drive bay 1 and remove the cable from the enclosure.
Front fan assembly Fkx
1. Disconnect the optical drive ribbon cable from the logic board and move the cable out of the way. Disconnect the following five cables from the front panel board FireWire 800 cable from connector J200 USB cable from connector J201 Front panel board power cable from connector J202 Front panel board audio cable from connector J600 Power button cable from connector J800 3. Using a magnetized 1 Phillips screwdriver, remove the five front panel board mounting screws. 4. Lift the front panel board...
Mac Pro Antenna
1. Insert a jeweler's flat-blade screwdriver into the notch on either side of the Bluetooth antenna cage and carefully pry up the cage from the enclosure. 2. Remove the Bluetooth antenna from its routing under the PCI port cage. 2. Remove the Bluetooth antenna from its routing under the PCI port cage. 4. Remove the antenna board and antenna from the enclosure.
Take Apart
General Information 9 Opening the Computer 10 Hard Drives 12 Optical Drive Carrier and Optical Drives 15 Memory FB-DIMMs and Memory Riser Cards 19 Processor Heatsink Cover 54 Front Fan Assembly 59 Mac Pro RAID Card amp Battery 62 Processor Heatsinks 68 Memory Cage with Rear Fan 73 Processors 76 Logic Board 89 Front Panel Board 98 Power Button 103 AirPort Antenna Board with Cables 108 Optical Drive Power Cable 112 Optical Drive Data Ribbon Cable 115 Ambient Board 118 Ambient Board Cable 120...
Front fan assembly Wkp
1. Disconnect the optical drive ribbon cable from the logic board and move the cable out of the way. 2. Disconnect the front panel board power cable from the front panel board and move it out of the way. 3. Disconnect the power button cable from the front panel board. 4. Lay the computer so that the front panel is facing down. 5. Remove the black rubber cap that covers the power button LED. 6. Using a jeweler's flat-blade screwdriver, pry up the metal C-ring that secures the power button board....
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ru o . O ma mo Use the following table to interpret the LEDs. Use the following table to interpret the LEDs. Power supply is providing trickle power CPU B halts on an IERR instruction error CPU A halts on an IERR instruction error EFI has configured the graphics card Note There is a position on the logic board next to LED 1 for a SLEEP LED that does not have any LED installed. This is normal the LED was used only in development. To determine if a Mac Pro computer is in sleep mode, watch the...
Part Number 922-8025
Note To remove the heatsink cover, you must first slide the memory cage toward the back panel. 1. Using a long-handled, magnetized 1 Phillips screwdriver, remove the two long screws that mount the memory cage to the logic board. 2. Using a short-handled, magnetized jeweler s 1 Phillips screwdriver or right-angle, magnetized 1 Phillips screwdriver, carefully remove the two short screws that mount the memory cage to the bottom panel of the enclosure. Important As you start to unscrew each short...
Internal Cabling Matrix
The table on the next page lists all Mac Pro internal cables that connect to the logic board and are not part of a larger subassembly. Following the table is a map of the logic board connector locations, which are listed in column 5 of the table. Serial ATA signals to from all four HDDs and main loqic board DC power to all four HDDs from main loqic board 7-pin flat to sensor bd underneath HDD 1 7-pin flat to sensor bd underneath HDD 2 7-pin flat to sensor bd underneath HDD 3 7-pin flat to...