JRC JMR-92 Series Field Service Manual page 646

Step 1 Remove the front cover of the display unit mount kit.
Loosen the screws that fasten the front cover of the display unit mount kit with a flat head
screwdriver and then take out the front cover.
Step 2 Remove the PSU from the display unit mount kit.
Remove all the connectors being connected to the front of the PSU. Loosen the two screws of the
TB1 on the right and left of the front and remove it together with the wires. The J50 and the J51
can be removed by pulling them out while holding down the tabs at the top center.
Remove the screws (M5: 2 locations) of the mounting plate that fasten the PSU, pull out the CCU
together with the mounting plate, and then remove it from the display unit mount kit.
To secure safety, turn OFF the main power circuit breakers of AC and DC power supplies
before replacement work.
4-425 Chapter 4 Replacement procedure