Apple mac pro 8x User Manual

							Mac Pro (8x) Take Apart — Hard Drive Cable Harness 121
Procedure
Disconnect the hard drive data and power cable connectors from the logic board. 1. 
Using a long-handled, magnetized #1 Phillips screwdriver, remove the two screws holding 2.  
the hard drive cable harness connector to the bracket below hard drive bay 1. 
Remove the connector from the bracket.3. 
Repeat for the other three connectors below hard drive bays 2, 3, and 4. 4. 
Remove the hard drive cable harness from the enclosure.5.  
						

							Mac Pro (8x) Take Apart — Hard Drive Temperature Sensor Cable 12 2
Hard Drive Temperature Sensor 
Cable
The hard drive temperature sensor cable is a wire harness with four connectors, one for each 
hard drive temperature sensor. Be careful not to catch or damage any of the wires when 
removing the harness from the enclosure.
Tools
No tools are required for this procedure.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Hard drives and hard drive carriers in drive bays 1 and • 2
Any 12-inch PCI Express card• s
Processor heatsink cove• r
Front fan assembl• y
Part Location 
						

							Mac Pro (8x) Take Apart — Hard Drive Temperature Sensor Cable 12 3
Procedure
Disconnect the hard drive temperature sensor cable from the logic board.1. 
Disconnect the four connectors on the hard drive temperature sensor cable from the four 2.  
hard drive temperature sensors.  
Remove the hard drive temperature sensor cable from the enclosure.3. 
Replacement Note: The connectors on the hard drive temperature sensor cable are labeled with 
HDD1, HDD2, HDD3, and HDD4 to indicate  the connector that belongs to each temperature 
sensor. 
						

							Mac Pro (8x) Take Apart — Hard Drive Temperature Sensor 12 4
Hard Drive Temperature Sensor
There are four hard drive temperature sensors, one for each hard drive. This procedure explains 
how to remove the sensor for the hard drive in drive bay 1. The procedure for removing the 
other three sensors is similar, except that the only part you need to remove before beginning the 
procedure is the hard drive directly over the sensor.
Tools
The only tools required for this procedure are a mirror and a black stick or a flat-blade 
screwdriver.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Hard drives and hard drive carriers in drive bays 1 and • 2
Any 12-inch PCI Express card• s
Processor heatsink cove• r
Front fan assembl• y 
						

							Mac Pro (8x) Take Apart — Hard Drive Temperature Sensor 12 5
Part Location
Procedure
Disconnect the sensor cable for the hard drive in bay 1 and move the cable out of the way. 1.  
						

							Mac Pro (8x) Take Apart — Hard Drive Temperature Sensor 126
Using a mirror, locate the two round black nubs on the bottom of the hard drive sensor 2. 
below hard drive bay 1. 
Using a black stick or a flat-blade screwdriver, press up on the nubs and remove the sensor 3. 
from the enclosure.  
						

							Mac Pro (8x) Take Apart — Power Cable Harness 12 7
Power Cable Harness
The power cable harness consists of the following cables:
Power supply PS1 cable• 
Power supply PS2 cable• 
Power supply PS3 cable• 
Power supply PS4 control cable• 
Front panel board power cable• 
Front panel board audio cable• 
Front panel board FireWire 800 cable• 
Tools
No tools are required for this procedure.
Preliminary Steps
Before you begin, open the computer, lay it on its side with the access side facing up, and remove 
the following:
Optical drive carrier and optical drive• s
Hard drives and hard drive carriers in drive bays 1 and • 2
PCI Express card installed in slot • 1
Any 12-inch PCI Express card• s
Processor heatsink cove• r
Front fan assembl• y
Top and bottom memory card• s with DIMMs
Memory cage with rear fa• n
Optical drive power cabl• e
Optical drive data cabl• e
Front panel boar• d 
						

							Mac Pro (8x) Take Apart — Power Cable Harness 12 8
Part Location
Procedure
Disconnect the power cable harness connectors from the logic board. 1.  
						

							Mac Pro (8x) Take Apart — Power Cable Harness 129
Using a Phillips screwdriver, remove the two mounting screws on the power supply cable 2. 
cover located at the back of the optical drive bay. 
Slide the cover toward the top of the enclosure, tilt it up until the two tabs on the cover clear 3. 
the slots in the media shelf, and remove the cover from the enclosure. 
 
Replacement Note: Replace the cover at an angle so that the tabs engage with the slots in 
the media shelf. Then lower the cover into place. 
						

							Mac Pro (8x) Take Apart — Power Cable Harness 130
Release the four power supply cables from their hook-and-loop fasteners on the enclosure.4. 
Depress the locking latch on each cable connector and disconnect the four power supply 5. 
cables from the four connectors on the power harness cable. 
Slip the four connectors out through the opening in the media shelf, removing them one at 6. 
a time.