Roland BK-5 Service Notes page 13

VIEW 4
When you need to replace the Encoder B. with the new one please replace also
the rectangular black felt.
Cut out the rectangular black felt from one of the "Felt Cushiun Speaker"
and fix it over the Encoder board.
VIEW 5
When you need to replace the Jack B. with the new one please apply 3 pcs
of Nitto Bi-Stick Tape #575W 30MM #40122556 under the Jack B.,
(under the three connectors) without peel off the external side, as indicated below:
Do not peel off the tape
on the external side
1,5 cm
BK-5
15