Hammond Model A, Руководство пользователя, Страница: 292 / 298

f. Secure the replacement mixing transformer assembly in place by reversing the
procedures given above.
5-73. PLAYING KEY.
5-74. Replacement of playing key on upper manual will be accomplished as follows:
a. Remove the four screws from the left and right-hand side panels of music
rack. Tilt the bottom of the rack by lifting the side panels and then remove the rack
by pulling outward.
b. Remove the 2 wood screws and the 2 overhead bolts from the ends of the
drawbar base.
c. Lift and block up the entire drawbar base.
d. To remove a black key, loosen its key mounting screw, unhook key from screw,
and lift out key.
e. To remove a white key, loosen its key mounting screw and those of adjacent
black keys. Unhook these keys from screws, push them back, and lift out white key.
f. Insert a replacement key and install by reversing the directions given above
for removal.
g. Adjust the tension of the replacement playing key by comparison with the
adjoining key.
5-75. Replacement of playing key on lower manual will be accomplished as follows:
a. Remove the four screws from the left and right hand side panels of the music
rack. Tilt the bottom of the rack by lifting the side panels and then remove the rack
by pulling outward.
b. Remove the two oval-head bolts from the ends of the stop base.
c. Pull out all drawbars to position 8.
d. Tilt the upper manual as far back as the top of the console will allow, and
then wedge or block it in this position.
e. Complete the replacement of the playing key on the lower manual by following
the same procedure given above for upper manual keys.
5-76. PEDAL SWITCH ASSEMBLY.
5-77. Replacement of pedal switch assembly will be accomplished as follows:
a. Remove the pedal clavier by lifting it up in front and then pulling straight
back.
CAUTION:
Be careful to prevent damage to the delicately
constructed pusher levers (switch
pushers) at the end of each pedal.
b. Unsolder the pedal cable wires from terminals on the generator.
c. Disconnect the brown and black leads from the filter located on the rear
surface of the upper manual assembly.
d. Disconnect the orange, red, and yellow pedal signal leads from the resistor
strip on the rear surface of the upper manual assembly.
25