Hammond Organ L-100 Series, Service Manual

Page: 5 / 87

Page v
INTRODUCTION TO ORIGINAL SERVICE MANUAL
II–1 OVERVIEW
This manual contains service information for L–100 Series organs.
The series is comprised of the following models:
L–100
L–100A
L–100–1
L–100–2
L–200
The Model L–100 Hammond organ is a completely self-contained
console, requiring no external tone cabinet. It has two manuals
or keyboards of 44 keys each, a 13 note pedal keyboard, and an
expression (swell) pedal for controlling the volume. All tones are
produced by electro-magnetic tone generators and electrically
amplified. Selection of tone colors is made by adjusting 17
drawbars and 6 preset tabs. Other characteristics of the music are
adjusted by means of 10 other tabs. A toggle switch, located to
the right of the console above the manuals, is used to turn on the
organ. A pilot light shows when the organ is turned on.
Model L–100A is similar to Model L–100, with the addition of
percussion voicing circuitry, controlled from the lower left end
block.
Model L–100–1 is similar to L–100, with a six-voice percussion
feature added. Percussion controls are mounted in the lower right
end block.
Model L–100–2 is identical to Model L–100–1, with the addition
of the “drawer” type automatic Rhythm II feature. No service
information for Rhythm II is contained in this manual, since its
circuitry is independent of the organ. For Rhythm II service
information, refer to the Service Manual for Rhythm II HO–466.
Model L–200 with inbuilt rhythm is electrically identical to the
L–100–2 organ. Wiring of the rhythm unit to the console is
presented in
Figure 5–9 .
L-Series organs will have fuses added to the Canadian power
supply (101–000130) to comply with C.S.A. standards. Location
and value of fuses are shown in
Figure 5–17 .
For convenience in locating desired information, this manual is
divided into the following sections:
I. How the Organ Operates
II. Theory of Operation
III. Disassembly
IV. Practical Service Suggestions
V. Diagrams
VI. Parts List
II–2 SPECIFICATIONS
DIMENSIONS: Width, 43½”; Height, 44½”; Depth, 23”
WEIGHT: 215 lbs.
POWER INPUT: 140 Watts
OUTPUT: 15 Watts, E.I.A.