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Presto Digitation Installation Manual
P
R E P A R A T I O N
Step 1
Remove the old action and discard
Step 2
Remove keys from key frame and discard. (At this time it will be necessary to remove
the mice nest, being careful that there are not any still residing there.)
Step 3
Before running the sweeper on the key frame, check for old coins. (This is my favorite
part!)
Step 4
Remove key frame from keybed.
Note:
Now is the time to refinish the case if desired.
T
E S T I N G
Step 5
a. Before installing the Presto-Digitation Kit, it is highly recommended that you
perform a bench test. This will ensure that the unit works properly and was not
damaged during shipping
b. Begin by unpacking the kit and comparing the parts with those listed on the check
list. Be very careful when handling the unit, especially the cables and wire harnesses
c. To connect the key set to the Circuit Board (#192122), place the key set on a bench
or table with the key tops up. Then carefully tilt the key set up so that it is resting on
the fronts of the keys. Do not leave it unattended in this position. This offers a good
view of the circuit boards located under the keys. You will notice two open red
rectangular connectors. The two loose ribbon cables coming from the Circuit Board
are to be connected here
d. If you examine this Circuit Board closely, you will notice that these ribbon cables
are connected at CONN 11 and CONN 12. Take the ribbon connected at CONN 11
and place it on the key set circuit board connector closest to the base end of the key
set. It is also important at this point to note that one side of the ribbon cable has a
red wire. This should also be on the bass end of the key set when it is connected.
Repeat this with the remaining cable and the keyboard will be connected properly
e. The speakers will now need to be connected. Find the circuit board with the large
black heat sink. You will notice that at CONN 12 there is a connector with a group
of four wires coming out of it. The board has been labeled with an "R" and an "L"
signifying the right and left channels of the amplifier. If you follow the four wires
