Sony MCC-3000MT Service Manual page 38

7. Remove the five screws to detach the KY-687 board, key (power) assembly and power key base.
Key (power) assembly
Harness
Knob L
8. Install the removed parts by reversing the steps of removal.
MCC-3000MT
Power key base
PSW3 x 6
CN402
Harness
CN401
PSW3 x 6
KY-687 board
2-6