Specifications

6. Replace the Ethernet PCB by reversing the previous steps.
7. Install the screw and washer at the card edge mounting bracket to secure the
printed circuit board.
8. Reinstall the Ethernet cable at the bottom end of the Ethernet PCB.
9. Remove the static grounding strap and replace the card cage cover.
Interface PCB Replacement
The Interface PCB is positioned inside the card cage with the Ethernet PCB on one
side and the blank space before the Low Voltage Driver PCB on the other side (see
Figure 2-19). Refer to the following procedure for replacement.
1. Turn OFF the power switch to the EMT 10/4T.
2. Remove the card cage cover and install a static grounding strap between the
working surface and the personnel performing this procedure.
3. Grasp the Interface PCB at the corners of the board and gently rock it out of its
connectors in the backplane PCB. Remove the PCB.
CAUTION! It is advised to place the removed PCB into an anti-static
bag before handling it any further. Portions of this board are very
sensitive to static charges.
4. To replace the Interface PCB, perform the previous steps in reverse order.
5. Remove the static grounding strap and replace the card cage cover.
Low Voltage Driver PCB
The Low Voltage Driver PCB is positioned inside the peripheral card cage in the last
position to the rear as Figure 2-19 shows. Refer to the following procedure for
replacement.
1. Turn OFF the power switch to the EMT 10/4T.
2. Remove the card cage cover and install a static grounding strap between the
working surface and the personnel performing this procedure.
3. Loosen the screws in the connector and remove the cable from the bottom end
of the Low Voltage Driver PCB.
4. Remove the screw and washer at the card edge mounting bracket for the Low
Voltage Driver PCB.
Low Voltage Driver PCB 2 - 27
110279-01, Rev B 2. Service Maintenance (except head and trimmer)