Apple mac pro User Manual

							Mac Pro Take Apart — Hard Drive Temperature Sensor Cable 131
Part Location 
						

							Mac Pro Take Apart — Hard Drive Temperature Sensor Cable 13 2
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 Take Apart — Hard Drive Temperature Sensor 13 3
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
PCI Express card installed in slot • 1
Any 12-inch PCI Express card• s
Top and bottom memory card• s
Processor heatsink cove• r
Front fan assembl• y 
						

							Mac Pro Take Apart — Hard Drive Temperature Sensor 134
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 Take Apart — Hard Drive Temperature Sensor 13 5
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 Take Apart — Power Cable Harness 13 6
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:
All hard drives and hard drive carrier• s
All PCI Express card• s
Top and bottom memory card• s
Processor heatsink cove• r
Front fan assembl• y
Processor heatsink• s
Memory cag• e
Optical drive power cabl• e
Optical drive data cabl• e
Front panel boar• d
Optical drive carrier and optical drive• s
Power supply•  
						

							Mac Pro Take Apart — Power Cable Harness 13 7
Part Location
Procedure
Disconnect the power cable harness connectors from the logic board. 1.  
						

							Mac Pro Take Apart — Power Cable Harness 13 8
Slip the four connectors out through the opening in the media shelf, removing them one at 2. 
a time. 
Remove the power harness cable from its routing along the edge of the logic board, over the 3. 
speaker assembly, and along the bottom lip of the enclosure. 
Remove the power harness cable from the enclosure.4.  
						

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Troubleshooting
Mac Pro 
						

							Mac Pro Troubleshooting — General Information 140
General Information
Memory
The Mac Pro computer has two memory 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 following 
illustration, DIMMs in one colored pair do not need to match DIMMs in a different colored pair.