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11. Remove 4 connectors and the M421-PSB1 PCB.
M421-PSB1 PCB
12. Remove 2 connectors and the Pedal connector.
Pedal connector
* When the inner side cover is removed, the nut is
loose. Take care not to lose it.
*
When you fit the inner case on the left side, insert the
M421-PSB1 PWB cable into the groove on the main unit.