Ricoh B286 Service Manual page 188

Boards
2. Remove:
! [A] Earth plate ("x2)
[B] Earth plate ("x2)
!
3. Disconnect the white and black harnesses [C] (#x2).
Remove the circuit breaker [D] ("x2, #x4).
4.
Remove the PSU [A] ("x1, #x10, &x all)
5.
B286/B289 3-60 SM