Yamaha S90 Owner's Manual page 125

5 Insert the Plug-in board into the expansion bay,
slowly pushing it all the way in until it fits in place.
Plug-in SLOT
6 Bring the cable end around and connect it to the
board. Make sure to connect the proper cable,
matching the color of the cable to the slot used.
Also, take care not to pull on the cable too forcefully
as you connect it to the board.
Plug-in Connector
Notch
Connector from S90 Plug-in board
Plug-in SLOT
7 Carefully put the ribbon cable back into the S90,
making sure that no part of the cable sticks out of
the instrument.
Plug-in SLOT
3 GREEN
2 YELLOW
1 ORANGE
Press the connectors together
until the two notches lock into
the sockets.
3 GREEN
2 YELLOW
1 ORANGE
3 GREEN
2 YELLOW
1 ORANGE
8 Replace the cover with the screw you removed in
step 2 above. Replacing the cover also serves to
securely hold the Plug-in board(s) in place.
9 Check that the installed Plug-in board is functioning
properly. Turn on the power.
• A message appears indicating that the installed Plug-in
Board is being checked. The main display then appears
and the corresponding slot indicator at the right top of the
front panel lights. This indicates that the board has been
successfully installed.
• If an error message appears, the S90 freezes after a while,
indicating that the installation was not successful. If this
happens, turn off the power and carefully go through the
installation procedure again.
Slot Indicator lamps
PROGRAM
SLOT 1
PRE 3 GM USER PLG 1
ORGAN GUITAR/ BASS STRINGS
PLUCKED
In this example, a Plug-in board has been installed to slot 1.
Installing Optional Hardware
SLOT 2 SLOT 3
CATEGORY
PLG 2 PLG 3
SEARCH
BRASS REED/PIPE
125