Ethernet Switch Replacement

Prerequisites

Table 1 Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	15 minutes	Not Applicable

Table 2 Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard Service Tool Kit	1	-	-	-

Table 3 Safety

Electrocution Hazard!
Dangerous voltages Exist in The System Cabinet When energized.
Turn off the Power to the Network switch with the circuit breaker located in the top area of the PGR Cabinet.

Perform LOTO on the PGR PDU/gradient subsystem before beginning this procedure. See the MR Service Safety Manual, PN 5452735.

Table 4 Required conditions
Condition	Reference	Effectivity
Turn off all ICNs from the Common Service Desktop. Go to Utilities > Toolbox > VRE > Power Control. Click Power Off for all ICNs.	-	-

The Ethernet switch transfers data between the host computer and the PGR cabinet components. The switch is part of the recon subsystem.

Perform LOTO on the PGR PDU/gradient subsystem. See the MR Service Safety Manual, PN 5452735.
Locate the Ethernet switch in the right side of the PGR cabinet, under the ICN.

Figure 1. Ethernet Switch Location (Typical PGR Cabinet Shown)
Remove the Ethernet cables from the front of the switch.

Figure 2. Ethernet Switch - Front View
Remove the four screws on the front of the switch bracket.
Pull the switch forward. Disconnect the power plug from the rear of the chassis.
If the switch is a returnable FRU, repack the defective switch into the FRU packaging and send it back to its destination.

Plug in the power cable to the rear of the switch.
Slide the network switch into the original position in the PGR cabinet.
Secure the switch to the cabinet with four screws.
D-link switches with hardware version G3 or H1 on the rating plate have DIP switches on the front. Set the DIP switches according to Table 5.

Figure 3. DIP Switches and LED Indicators

1 DIP switches

2 Power LED

3 Connection LEDs

Table 5 DIP Switch Settings
DIP Switch Setting

EEE OFF

Flow Control ON

Port Isolation & Storm Control OFF
Reconnect all Ethernet cables to the ports on front of the switch as marked.
Remove LOTO and power up the unit. See the MR Service Safety Manual, PN 5452735.
Check that the green power LED is on. Also check the connection LEDs for each connected port (solid green indicates a good connection, and flashing green indicates network activity).

Table 5 DIP Switch Settings
DIP Switch	Setting
EEE	OFF
Flow Control	ON
Port Isolation & Storm Control	OFF