Removal Of Control Board U91 Or U92 - Yamaha SIGMA-G5SII Service Information

4.1.2. Removal of Control Board U91 or U92

Service Information
Setscrews
Fig. D3
Setscrews
(1) Remove the board fixing block.
Fig. D4
121/273
For Service Engineer
(3) Disconnect the power connectors.
4pin × 1, 8pin × 1 and 20pin × 1
(4) Remove the two setscrews and pull
out the BOX.
(5) Incline the drawn out CPU BOX
toward the right hand side and keep it
as shown in the figure.
Remove the upper plate.
(Setscrews in four locations; Refer to
the left figure).
* Because SSD has been attached to
the upper side of the cover, open the
cover, with careful attention to the
wiring for the SSD.
* Loosening the two setscrews, can
remove the board fixing block as
shown in the figure.
SI1705004E-00=SIGMA-G5SII Service Manual