Kontron CG1200 Carrier Grade Server - Manual (Page 80)

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Kontron CG1200 Carrier Grade Server Installation and Maintenance Guide 74
6. If this is the last task you are performing inside the server chassis, replace the chassis cover and
reconnect any external devices and the power cord(s).
5.7 Replacing the Power Distribution Board
The power distribution board (PDB) routes power from the power supply module(s) to the rest of the
server through an integral wiring harness.
To replace the PDB, you must first remove the following components:
•
Top cover
•
All cables connections from the PDB at the other end (The cables are soldered onto the PDB and the
new board has a new set of cables attached.)
-- HDD backplane board power cable (from the backplane board, soldered on the PDB)
-- Baseboard SSI main power cable (from the 24-pin connector on the baseboard; bundle
soldered on the PDB)
-- CPU and DIMM power cables (one for each CPU, from the 8-pin connectors on the
baseboard; soldered on the PDB)
-- Auxiliary I/O power dongle (from any auxiliary PCI adapters installed and out of the PCI air
baffle, soldered on the PDB)
-- Baseboard power control signal cable (from the baseboard, soldered on the PDB)
•
Front panel power cable
Refer to Figure 7: Baseboard Components and Connectors” and Table 5, for the location of the
connectors where the cables are to be unplugged.
CAUTION: Before replacing any of the boards on the CG1200 server, you must first take the server out of
service, turn off all peripheral devices connected to the server, turn off the server by pressing the power
button, and unplug the power cord(s) from the system and wall outlet.
When handling the power distribution board, observe the normal safety and ESD precautions. See
Appendix A: Safety Information for more information.
5.7.1 Removing the Old Power Distribution Board
1. Power down the server and unplug any external devices and the power cable(s).
2. Remove the chassis cover. For instructions, see Section 3.2.1, “Removing the Chassis Cover”.
3. Slide the power supply module(s) out a few inches to disengage it from the PDB connector(s).
4. Remove the front bezel if you will be using the ESD ground with your wrist strap. For instructions, see
Section 3.2.3, “Removing the Front Bezel”..
5. Disconnect all of the cables soldered on the PDB where they are connected on other components in
the server, starting with the cables that run along the side of the server board, under a protective
plastic sheath:
5.1. Lift the black plastic sheath up and pull it up and out of the way.
Lift the cables up so you can see where they are connected on the server board.
5.1.1. Disconnect the 2x4 CPU2 power connector. For the location, see Figure 7, “E”.
5.1.2. Disconnect the 2x12 main power connector. For the location, see Figure 7 “F”.