Kontron CG2200 Carrier Grade Server - Manual (Page 78)

71
Kontron CG2200 Carrier Grade Server Installation and Maintenance Guide
5.6.2 Installing the New Telco Alarms Module
1. Slide the new TAM board toward the front panel and align it with the two holes for the retaining
screws. (Figure 51)
2. Fasten the retaining screws from the front panel of the chassis to hold the board in place. (Figure 51)
3. Replace the front panel board if you removed it or slid it out to work on the TAM board installation.
For instructions, see “Installing the New Front Panel Board”.
4. Connect the alarms cable from the FP board to the TAM board. (Figure 51
5. Connect the alarms cable from the rear of the chassis to the TAM board. (Figure 51)
6. Re-install the fan cage.
7. If this is the last task you are performing inside the server chassis, replace the chassis cover and the
front bezel, reconnect the power cord(s), and reconnect any external devices.
5.7 Replacing the Fan Control Board
The fan control board is located on the chassis floor in front of the server board and just behind the fan
cage. The fan control functions are controlled by the fan controller IC. This controller monitors the “Fan
Present” signals from each of the fan positions, drives the “Fan PWM” signals, monitors the “Fan Tach”
signals, and drives the “Fan Fail” signals. Fan speed is controlled using temperature sensors located on
the server board. When a fan fault is detected the fan controller drives the “Fan Fault” signal “ON” in the
fault LED on the fan assembly. Simultaneously, a composite fan fault LED, visible at the chassis front
bezel, is turned “ON” on the front panel LED board.
Before you can replace the fan control board, you need to remove the chassis cover, the fan cage, the
support cross bar (and all components attached to it), and the CPU power cables that are routed above
the fan control board inside an insulator cover.
5.7.1 Removing the Old Fan Control Board
To remove the fan control board from the chassis:
1. Power down the server and remove all peripheral devices and the power cord(s)
2. Remove the chassis cover. For instructions, see “Removing the Cover”.
3. Disconnect the CPU power cables and move them out of the way. For instructions, see
“Removing the CPU1 and CPU2 Power Cables”.
4. Remove the sheet metal fan cage.
5. Disconnect all of the cables connected to the fan control board: See Figure 52, “A” for the
connector locations on the board.
•
Input power connector
•
I2C connector
•
Multifunction output power and signal cable
•
Three fan cables for the fan pairs (if not already disconnected when removing the fan cage).
6. Unfasten the five screws on the fan control board that fasten it to the chassis floor. See Figure 52
for the locations of these screws. Save the screws for use with installing the new fan control
board.
7. Lift the fan control board out of the chassis.