Yamaha XM4220, Service Manual

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XM6150/XM4220
10
6. DRV6(4/5) Circuit Board <XM6150>
DRV4(4/5) Circuit Board <XM4220>
6-1 Remove the top cover. (See procedure 1.)
6-2 Remove the front panel. (See procedure 2.)
6-3 Remove the two (2) screws marked [370A]. The
DRV6(4/5) circuit board or the DRV4(4/5) circuit
board can then be removed with the LED angle
bracket. (Fig.3)
6-4 Remove the four (4) screws marked [370B]. The LED
angle bracket can then be removed from the DRV6
(4/5) circuit board or the DRV4(4/5) circuit board.
(Fig.3)
7. DRV6(5/5) Circuit Board <XM6150>
DRV4(5/5) Circuit Board <XM4220>
7-1 Remove the top cover. (See procedure 1.)
7-2 Remove the front panel. (See procedure 2.)
7-3 Remove the two (2) screws marked [220]. The PSW
angle bracket can then be removed. (Fig.4)
7-4 Pull out the PSW knob and remove the two (2)
screws marked [210]. The DRV6(5/5) circuit board
or the DRV4(5/5) circuit board can then be removed
from the PSW angle bracket. (Fig.4)
8. Fan
8-1 Remove the top cover. (See procedure 1.)
8-2 Remove the front panel. (See procedure 2.)
8-3 Remove the four (4) screws marked [170]. The fan
can then be removed. (Fig.4)
[370A] [370B]
[370A]
[370B]
[370B]
[370B]
DRV6 DRV4 4/5 or 4/5
DRV6 DRV4 4/5 or 4/5
DRV6 DRV4 5/5 or 5/5
Front panel
LED angle bracket
〈
Right Side View
〉
(Fig.3)
[370]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)
[170] [170]
[170] [170]
[210]
[210]
[220]
[220]
DRV6 DRV4 5/5 or 5/5
PSW angle bracket
Fan
(Fig.4)
〈
Front View
〉
[170]: Bind Head Screw 4.0 X 45 MFZN2BL (VB857700)
[210]: Bind Head Screw 3.0 X 8 MFZN2BL (VB659000)
[220]: Bind Head Tapping Screw-B 3.0 X 8 MFZN2BL (EP600190)