Panasonic SJ-MR220 Service Manual page 9

[Checking for the main P.C.B. (B side)]
- Each parts on main P.C.B. (B side) can not be checkesd directly,
however, for the checking of main component parts on P.C.B., refer
to the "Checking procedures of main components parts on the main
P.C.B. (B side).
5.2. Replacement for the intermediate cabinet
- Follow the (Step 1) - (Step 3) of item 5.1.
9