Yamaha CS1D Service Manual page 34

49. CS MB21, MB22 Circuit Board
49-1 Remove the Control Panel Assembly (IN SEL, IN12,
IN24). (See Procedure 1.)
49-2 Remove the rear panel (A). (See Procedure 38.)
49-3 Remove all the CARD assembly in the procedure 45.
49-4 Remove the two (2) screws marked [450] and the the four
(4) screws marked [460]. The MB21 assembly can then be
removed. (Fig. 11)
49-5 Remove the four (4) screws marked [440c]. The CS
MB21 circuit board can then be removed. (Fig. 18)
49-6 Remove the two (2) screws marked [480] and the two (2)
screws marked [490]. The MB22 assembly can then be
removed. (Fig. 11)
49-7 Remove the two (2) screws marked [470c]. The CS MB22
circuit board can then be removed. (Fig. 18)
[ 470c ]
[440c]: Bind Head Tapping Screw-B 3.0 x 6 MFZN2BL (EP600230)
50. CS MB23 Circuit Board
50-1 Remove the Control Panel Assembly (IN36, IN48).
(See Procedure 1.)
50-2 Remove the rear panel (C). (See Procedure 38.)
50-3 Remove the five (5) screws marked [510] and the seven
(7) screws marked [520]. The MB23 circuit board with the
angle can then be removed. (Fig. 11)
50-4 Remove the seven (7) screws marked [500c]. The MB23
circuit board can then be removed. (Fig. 19)
CS MB22
CS MB21
[500c]: Bind Head Tapping Screw-B 3.0 x 6 MFZN2BL (EP600230)
[ 440c ]
[470c]: Bind Head Tapping Screw-B 3.0 x 6 MFZN2BL (EP600230)
Fig. 18
[ 500c ]
Fig. 19
CS1D
CS MB23
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