JRC JMR-92 Series Field Service Manual page 732

Step 4 Remove the bottom sheet metal
Remove the bottom sheet metal of OPU frame.
In the 26" Display Unit mount kit, Remove the screws (M3: 2 locations) that fasten the sheet
metal and then take out it.
Taking out the OPU sheet metal from 26" Display Unit mount kit
In the 19" Display Unit mount kit, you can remove the sheet metal and OPU frame together.
Step 5 Remove the front cover and the Junction Box
Remove the front cover from the Display Unit mount kit by referring Chapter 4.
4-511 Chapter 4 Replacement procedure