Yamaha DX711 Series Manual page 66

Step 5 Locate the following IC's and solder the five
wires to their proper pin location.
Wire color Ic# Pin #
пате on E! board)
GREEN (A15) IC 40 1
BROWN (RW) Ic 12 1
ORANGE ('PON) IC 25 20
BLACK (EN) IC30 5
RED (VBATT) 1С 25 28
If you find that some of these pin locations on the DM board
are obstructed or already have another wire soktered-to
them, you can solder E!'s wires to the correct pin on the
back of the DM board.
Step 6 Remove IC 23 and carefully install E!'s ribbon
cable into the socket, making sure that all
pins are making contact.
Be sure to keep the original IC 23 chip in a safe place, just in
case you need it in the future. If you find that IC 23 has been
previously soldered onto the DM board, you will need to remove
and replace it with a 28-pin socket. This is a delicate procedure
and should be done only by an experienced technician.
step 7 inspectall connections. Check all wire loca-
tions, solder points, and the ribbon
cable connection.
Step 8 Holding E! firmly against the DM board, care-
fully flip the DM board over once agaín and
place it back in its original position.
Reconnect all cables that were disconnected for the installa-
tion. Using the two longer screws included with El, sctew the
E! board through the DM board. Now, screw down the entire
DM board. Boforo ropiacing the back panel, you should
flip the DX7II over, connect it to a power source, and tum it
on. If the opening message appears on the LCD and then changes
to the normal Voice select screen, the E! board is working properly
and the back panel can be replaced.
Step 9 IMPORTANT!!! To properly initialize the
Elquipped DX7II:
First load a RAM 4 Cartridge into Ет four memory banks
(see pages 5 & В of the User's manual.) Be sure to load
WITH System. [On a DX7IIFD, you can also load an ERAM
disk after you have loaded at least one bank with a cartridge. If
there is already SElquencer data stored in the ERAM; there will be.
по need to continue with the rest ofthis initializing procedure.]
Мех, press button 14 until the screen says "Load Program?"
Move the cursor over to select SE!quencer and press YES
'(wice.) Once you are at the SElquencer main menu, press
button 4 to enter the Utilities mode. You want to press button
4 again to enter the Global Utilities. Press button 1 to erase
ай SEtquencer memory and then press YES (this Initializes
li SElquencer memory banks; H this Із not done, SE!quencer's
ВАМ will be corrupt!) Press NO repeatedly to Exit and retum to
the DX7II Edit mode (when the LCD says "Are you sure?", answer
YES)
Finally, select any PERFORMANCE from Internal RAM to clear the
Edit buffers. And that's it!
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