Hammond Organ L-100 Series, Service Manual

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Page 25
a. Remove four screws which secure metal cover on control
panel assembly.
b. Push drawbar all the way in.
c. Remove screw at back end of drawbar.
d. Pull out contact spring. To disconnect spring entirely,
unsolder wire.
CAUTION
Do not under any circumstances pull drawbar forward while contact
spring is off, as damper spring will catch in slot and necessitate
removal of entire drawbar assembly.
3–6 DRAWBAR, DRAWBAR KNOBS OR DRAWBAR
ASSEMBLY
To remove any of these, proceed according to the following.
a. Remove four screws that secure metal cover on control panel
assembly.
b. Unsolder black wire from “Full Organ” tab switch.
c. Remove two large screws located at ends of control
assembly that secure the assembly to the upper manual.
Turn control panel face up, and prop up in this position, being
careful not to stress wires.
d. Remove four hexagonal machine screws holding drawbar
assembly to base.
e. To remove knob, tilt drawbar assembly up, and remove screw
which holds knob.
f. To remove drawbar and contact spring, pull them out at back
of assembly, while pressing with thumb to release pressure
on contact.
g. To separate drawbar from contact spring, remove screw at
back end of drawbar.
h. To remove entire drawbar assembly, unsolder all connecting
wires.
3–7 UPPER MANUAL
To remove upper manual proceed according to the following.
a. Remove four screws which secure metal cover on control
panel assembly.
b. Unsolder black wire from the “Full Organ” tab switch going to
drawbar assembly.
c. Disconnect nine colored wires emanating from right end of
upper manual which terminate at upper manual control Cab
switches.
d. Dismount the AO–41 or AO–47 Vibrato and AO–42
Percussion amplifiers from rear of upper manual.
e. Remove heavy grounding wire attached to manual just to
right of first key channel.
f. Remove small bracket holding pedal click filter to manual
(grey wire from pedal drawbar leads to this filter).
g. Remove two upper manual mounting bolts which secure
manual assembly to case work.
h. Remove two screws which pass through angle brackets into
upper manual. These brackets are located on inside of cheek
blocks. The screws are accessible from front of organ.
i. Remove two screws securing control panel to upper manual
and tilt control panel face up.
j. Remove four hexagonal machine screws holding drawbar