Yamaha O2R Owner's Manual page 333

Peak Meter Bridge and Wooden Side Panels
1. Turn off the 02R.
TO PREVENT ELECTRICAL SHOCK, ENSURE THE 02R IS TURNED OFF
BEFORE YOU FASTEN ANY CONNECTORS OR UNDO ANY SCREWS!
Note: Before you install the MB02 on the 02R, be certain to turn the
power off. Not only do you risk electrical shock, you can also damage either
the 02R or the MB02. You may also invalidate any warranties for the 02R or
the Peak Meter Bridge (MB02).
2. Install the Peak Meter Bridge and/or Wooden Side Panels as
shown in the following diagram:
3. Turn on the 02R.
Verify that the MB02 is functioning correctly.
Memory Expansion Kit
The Memory Expansion Kit (ME4M) is a dealer/service
center installed option only. Any attempt by a customer to
install this option will invalidate any warranties for the 02R or
the ME4M.
Please take your 02R to your YAMAHA dealer or a YAMAHA service
center to have the Memory Expansion Kit (ME4M) installed in the 02R.
Installing Options
02R User's Guide
223