E1) Disconnecting Baseboard Power Side Cables - Kontron CG2300 Installation And Maintenance Manual

Interconnect Number and Name
front panel board to provide HDD LED
signal control on the disk drive carriers
and on the system front panel
4.6.1

(E1) Disconnecting Baseboard Power Side Cables

The four baseboard power side cables all run from the power distribution board, across the cable bundle bracket in protective
covers, to their connectors on the baseboard.
The baseboard power cables need to be disconnected on the baseboard side (soldered on the PDB side) before performing tasks
such as replacing the power distribution board or replacing the server board. Because these baseboard power cables are carried
on the cable bundle bracket, they also need to be disconnected for any task that requires the fan cage/cable bracket assembly
to be removed from the chassis.
Before you can disconnect the baseboard power cables from their baseboard connectors, you must first remove the right riser
card assembly, the processor air duct and the support cross bar. For instructions, see (B2), (C), and (D) in Chapter 4.
Disconnecting Main Power
The baseboard SSI main power cable provides power to the baseboard and the power supply with the "PS-ON" signal from the
power distribution board. The cable is soldered to the PDB and connected to MAIN_PWR (J9G1).
For the location of the connector on the baseboard, see Figure 12 in this section (E).
To disconnect the main power cable
1. If present, uncover the black insulator covering the power cable bundles in the cable bracket. See Figure 13.
2. Disconnect the main power cable bundle from the baseboard and pull it to the side of the system.
(Since the cable is soldered onto the power distribution board, it cannot be removed from the chassis, but you can pull it over
to the left side, out of the way, when working with components in the front of the chassis.)
Disconnecting the PMBus (SSI Power Control) Cable
This cable sends PMBus signals between the power supplies and the baseboard. It is soldered on the PDB side and connects to
the baseboard PMBus connector (J9E1) on the other end.
For the location of the PMBus connector on the baseboard, see Figure 12 in this section (E).
To disconnect the PMBus cable:
1. If present, uncover the black insulator covering the power cable bundles in the cable bracket under the cross bar. See Figure
13.
2. Disconnect the PMBus power cable from the baseboard and pull it to the side of the system.
(Since the cable is soldered onto the power distribution board, it cannot be removed from the chassis, but you can pull it
over to the left side, out of the way, when working with components in the front of the chassis.)
Disconnecting the CPU 1 and CPU 2 Power Connectors
The CPU1 and CPU2 power cables bring power from the power distribution board to the CPUs (and their DIMMs). The CPU1 cable
connects to the baseboard at the front of the board near the CPU1 DIMMs, (
another black insulator along the right chassis wall to a connector at the rear right side of the board, (CPU_1_PWR, J9A2).
For the locations of these cables, see Figure 12 in this section (E).
30
Connections
CPU_1_PWR, J8K2)
Installation and Maintenance Guide
. The CPU2 cable is routed through
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