JRC JMR-92 Series Field Service Manual page 649

Remove the screws (M4: 4 locations) of the mounting plate and pull out the PSU from the
mounting plate. For more information about the removal procedure, refer to "4.3.6.2 Replacing
the Power Supply Unit: PSU NBD-913."
Step 3 Remove the PSU side plates.
Remove the side plate covering the fans of the PSU (M3: 6 locations).
Step 4 Disconnect the connector of the fans.
Lift the side plate covering the fans of the PSU. Disconnect the connector of the fans inside the
PSU.
Chapter 4 Replacement procedure 4-428