Hammond Organ L-100 Series, Service Manual

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3–1 GENERAL
This section contains description of disassembly techniques
peculiar to L–100 Series organs.
3–2 ACCESS
For access to some of the parts discussed in following paragraphs
it may be necessary to remove organ top, back, or both.
3–3 UPPER MANUAL KEY
To remove an upper manual key, proceed according to the
following:
a. Remove four screws which secure metal cover on control
panel assembly.
b. Remove two large screws located at ends of control
assembly, which secure it to the upper manual.
c. To remove a black key, loosen its key mounting screw. Lift
control panel assembly and lift out key.
d. To remove a white key, loosen its key mounting screw and
those of adjacent black keys. Lift control panel, push the keys
back and lift out white key.
NOTE 3–3–A
If removal involves the lowest three keys, it will be necessary to
remove or loosen drawbar assembly. See
3–6 Drawbar, Drawbar
Knobs or Drawbar Assembly .
3–4 LOWER MANUAL KEY
To remove a lower manual key proceed according to the following.
a. Remove four screws which secure metal cover on control
panel assembly.
b. Remove two upper manual mounting bolts which secure
manual assembly to case work.
c. Remove two screws which pass through angle brackets into
upper manual. These brackets are located inside of cheek
blocks. These screws are accessible from front of organ.
d. Remove AO–41 and AO–42 amplifiers from rear of upper
manual.
e. Tilt manual up from front.
f. Using ¼” box ratchet, loosen key mounting screw.
g. To remove a black key, loosen its key mounting screw.
Unhook key from screw and lift off key
h. 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 the white key.
3–5 DRAWBAR CONTACT SPRING
To remove a drawbar contact spring proceed according to the
following:
SECTION III
DISASSEMBLY