7.1 Removing the top panel and MAIN, CPL and CPR P.C.B..
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(Step1)
Remove the 4 screws
. (refer to Fig.2 )
(Step2)
Remove the 2 screws
(Step3)
Remove the top cover in the direction of arrows from rear side of this piano, make its state as Fig.2. And remove the screws of each P.C.B.s. (refer to Fig.2 )