Leslie x 77 l service manual

Page 1

o The Leslie X-77 L

GENERAL OPERATING
AND MAINTENANCE INSTRUCTIONS

TO ORDER PARTS IN THIS SECTION REFER TO
MANUFACTURER AT ADDRESS BELOW:

ELECTED-MUSIC. INC.

DTgIIaT
56 wesr DEL MAR BOULEVARD vszessgcm e,
PASADENA, CA 91105 9 C a [31:9 n BNANCIPK:

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Me er
2005.01.27
Unzevschrm y 12:19 in wroo

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ELECTRO MUSIC
Bin 30, Auoyo Annex A Division of Columbia Bloodcasting Systems, Inc. Feb. 1969
Pawdenu, Culiiomia 91109 CBS Musical lnshumcnk 023846

Page 2

Introduction

THE LESLIE ORGAN SPEAKER

MODEL X-77I.

The Leslie X-77L is a 200-watt, four-channel speaker
designed for use with the Hammond X-77 Model
organ. The speaker incorporates {our fifty-watt solid-
state amplifier channels and six heavy-duty perman-
ent magnet loudspeakers. Controls for the speaker
are inte rail to the organ console. The block diagram
below 5 ows how the amplifier channels are connect»
ed to the speakers in the cabinet.

The vibrato channel drives the treble rotor speaker
and the rotosonic drum. A crossover network directs
all frequencies above 800 Hz, to the treble rotor driv-
er, and all lower frequencies to the 6x9 speaker
mounted in the rotosonic drum.

The non-vibrato channel drives the two stationary
6 x 9 speakers.

The pedal channel drives the 15-inch pedal speak-
er. Part of the higher-frequency pedal signal is routed

through the space generator, which drives the percus-
sion amplifier and speaker.

The percussion channel drives the 8-inch percus-
sion speaker.

When the Celeste tab is pressed down, the output
of the non-vibrato amplifier is passed through a cross-
over network. This network passes frequencies above
800 Hz. to the rotating horn assembly. Frequencies
below 800 Hz. drive the two stationary 6" x 9" speak-
crs. The non-vibrato signal also passes through one
channel of the space enerator. The signal from the
space generator is fe into the percussion amplifier,
which drives the 8 percussion speaker.

NOTE: When the Celeste tab is depressed, the vi-
brato channel out ut bypasses the 800 Hz. crossover,
and drives only t e 6x9 speaker in the rotosonic
drum.

BLOCK DIAGRAM

LlIBRATO VIBRATO
AMPLIFIER

TREBLE
SPEAKER

, Rorosomc
k DRUM
I I

I
E |
W s . 9
C«on wanna NON VIBRATO . : NON
AMPLIFIER . u VIBRATO
._E_. ° 6 x s
SPACE I
F GENERAYOR V q 1
z
CPEDAL PEDAL I ° '5'
AMPLIFIER I 5°
I
. I
I
I
I
I
PERCUSSION NON TREMOLO pchussmN I a'
AMPLIFIER : PERCUSSION
PERCUSSION TREMOLO :
TREMOLO GENERATOR 'I
I
D '
l
CELESTE CELESTE _______________ J
C CONTROL

Fig.