JRC JMR-92 Series Field Service Manual page 698

Step 9 Remove the rear panel.
Among the screws (M5: 4 locations) that fasten the rear panel, loosen the upper two screws,
remove the lower two screws, and then take out the rear panel together with the sensor LAN
switch unit.
If a UPS is installed, the weight of the rear panel increases to 10 kg or more.
Be careful not to catch your hands while removing the rear panel.
Step 10 Change the sensor LAN switch unit.
Remove the screws (M3: 4 locations on the back of the rear panel) that fasten the sensor LAN
switch unit onto the rear panel and change the sensor LAN switch unit. After replacing the sensor
LAN switch unit, assemble to the original condition by repeating the same procedure in the reverse
order. Please make sure to tighten all the screws and connect all the cables back in place.
Connect the Eithernet cables to the same connection ports after replacement.
Loosen
Remove
4-477 Chapter 4 Replacement procedure