Yamaha SIGMA-G5SII Service Information page 81

(3) When the Maintenance Mode Change Mode is started, perform the following operation.
When the section shown as "
Maintenance ModeChange Mode is started, " " in the indication area, is changed to
" ".
When the section shown as "
the indication is changed to "
(4) When the section shown as "
indication is changed to "
When the section shown as "
after the indication is changed to "
" ".
Service Information
" in the lower left is selected within 5 seconds after the
" in the lower left is pressed for 3 seconds or more after
", the indication is changed to "
" in the lower right is selected with 5 seconds after the
", the indication is changed to "
" in the lower right is pressed for 3 seconds or more
", the indication is changed to
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".
".