Hammond L Service Manual

SERVICE

IVIANmL

-

-^---^•'-ttiinrf

HO-735

HAMMOND ORGAN

COMPAIW

DIVISION

OF HAMMOND

CORPORATION

11700 Copenhagen

Court

/

Franklin Park,

lUinois

6013]

(312)

766-6950

TABLE OF

CONTENTS

Page

Introduction

.

iv

Specifications

iv

SECTION

I

-

How

the Organ Operates

1-1

General

1-1

1—2

Tone Source

1

—

1

1—3

Motor and Power

Switch

1—4

1—4

Tone Generator

1-4

1—5

Manuals 1—5

1—6

Harmonic

Drawbars

1—7

1-7

Pedal Drawbar 1-7

1-8

Pedal Keyboard

1-7

1—9

Expression Pedal

1—7

1-10

Control Tabs

1-8

1-11

Preset Tabs

1-8

1-12

Vibrato Tabs

.

1-8

1

—

13

Reverberation

Volume

Soft Tabs

1—8

'

1—

14 Percussion Control

Tabs

1—8

1-15

L-IOOA

Preset

Percussion

Unit

1-9

1-16

Selector Switch

1-9

1-17

Harmonic

Busbar

Switching

and

Reiteration

Split

...

1-9

1—18

L—

100—

1

Six-Voice

Percussion

Feature

.

1—9

1

—

19 Location of

Controls

1—9

1-20

Voicing

1-9^

1-21

Operation of

Controls

1—9

1—

22 External Equipment

1

—

1

1—23

Extension

Speakers

1—1

1—24

External

Sound

Source

1-1

1—

25 Earphones

1—1

SECTION

II

-

Theory

of Operation

2-

1 General

2-1

2—2

Preamplifier

2—1

2-3

Vibrato Phase

Shift

Amplifier 2-1

2—4

Percussion

Amplifier 2—2

2-5

Reverberation

and Power

Amplifier

2—2

2-6

Power

Supply

2-3

2—7

L-IOOA

Percusion Voicing

Circuitry

2-3

2-

8 Mode

Switch

2-3

2—9

Frequency

Divider 2—4

2-10

Cymbal

and

Brush 2-4

2-11

Brush

Keying

2-4

2—12

Cymbal

Keying

2—4

2—13

Bmsh

and

Cymbal

Amplification 2-4

2—14

Power

Supply

2-4

2—15

L-

1

00-1

Six-Voice

Percussion

Circuitry

2-4

2-16

Power

Supply

2-4

2-17

Push-Button

Circuits

2-5

2-18

Lower

Manual

Keying

Circuits

2—5

2-19

Pedal Keying

Circuit

^

2-5

SECTION

III

-

Disassembly

3-1

General

,

3-1

3-2

Access

,

. .

.

3-1

3—3

Upper

Manual Key

3—1

3—4

Lower

Manual

Key

3—1

3—5

Drawbar Contact

Spring

3—1

3—6

Drawbar,

Drawbar

Knob,

Drawbar

Assembly

3—1

3-7

Upper Manual

3-2

3—8

Lower

Manual

3—2

3—9

Generator

3—2

3-10

Motor

3-2

3-11

Pedal Keyboard

3-2

3—12

Swell Assembly

3—3

3-13

Tab

3-3

3-14

Pilot Light

on

Power Switch

3-3

3-15

L-IOOA

Percussion Circuitry

3—3

3—

16 L—

1

00—

1 Six-Voice Percussion

3—3

SECTION IV

-

Practical

Service

Suggestions

4-

1

General

4-1

4—2

Organ Performance

Check

4—1

4—3

Equipment

Required

4—1

4-4

Procedure

4—1

4-5

Vibrato

4-2

4—6

L—

1

OOA

Percussion

Performance

Check

4—3

4—7

L-

1

00-

1

Six-Voice

Percussion Performance

Check

and

Troubleshooting

4—4

4-8

Output

Level

Adjustments 4-4

4-9

One

Voice

is Silent

:

4-4

4-10

Programmed

Voice Does Not Speak

4-4

4—

1 1

All

Percussion Voices Silent

4—4

4-12

Both

Hiss

Voices

Silent

4-4

4—13

No

Voice

Response from

Pedals

4—4

4—14

No Voice

Response from Manual

4—4

4—15

No

Percussion Output

4—4

4—

16

Troubleshooting

4—4

4-17

Organ Does Not Play

4-5

4—18

Key Does

Not

Play

or

Harmonic

Missing

4—5

4-19

One

Note

is

Weak

4-6

4—20

Percussion Notes

Weak

or Missing (L—

100)

4—6

4-21

Full

Volume

Pedal Cipher

4-6

4-22

Hum

4-6

4—23

Replacing Tubes

4—6

SECTION

V

-

Diagrams

5—

1 General

5—1

SECTION VI -Parts List

Index

-

L-

1 00

Series

6-1

Index

-

L-200

Series

6-15

LIST

OF

ILLUSTRATIONS

Wigure

Page

1-1.

L-lOO

Console, Front View

1-1

1—2.

L— 100

Console, Rear

View

1

—

2

1-3.

Block Diagram,

L-

100

Series

1-3

1—4,

Typical Tone Generator

1—4

1—5.

Magnet

Locations on Tone

Generator

1—4

1—6.

Filter

Locations

and

Frequency

Terminations

on

Generator

Cover

1—5

1-7.

Manual

Wiring Chart

1-6

1—8.

Drawbars

&

Control

Tabs

(Partial View)

1—7

1-9.

Pedal

Keyboard

1-8

1-10.

L- 1

OOA Preset

Percussion

Unit

1-10

1-11.

L- 1

00-

1

Six-Voice Percussion

Controls

1-10

1

—

12.

Earphone

Adapter

Circuit

1—11

4—

1.

Vibrato

Adjustment

Waveform

4—2

5—

1.

Schematic Diagram,

L—

100

Organ

with

AO

-41

Amplifier

....

5—2

5—2.

Schematic Diagram, L—

100

Organ with

AO—

47 Amplifier

....

5—3

5—3.

Schematic

Diagram, L— 100 Organ with

AO—

47

Amplifier

and

LDR Expression

Control

5—4

5-4.

Schematic

Diagram,

L-IOOA,

L-

100-1

8l L-

100-2

Organ Consoles

5—5

5—5.

Schematic

Diagram and Parts

Layout, L—

lOOA

Percussion

Unit

5—6

5—6.

Schematic

Diagram

and

Parts

Layout,

L—

100—

1 Six-Voice

Percussion

5—7

5—

6A.

Schematic

Diagram and Parts

Layout,

L—

100—

1

Six-Voice

Percussion,

Early 1 970 Production

5—8

5—7.

Schematic

Diagram, L—

100-

1 Percussion Power Supply

....

5—9

5—8.

Schematic

Diagram

&

Parts

Layout,

Pedal Control Board ....

5—10

5-9

Wiring Diagram,

L- 100

Organ

5-11

5-10.

WiringDiagram,

L-

100-1

and L-

100-2

Organs

5-12

5—11.

Wiring

Diagram, Control

Panel,

L-lOO Series

5—13

5—

1

2.

Wiring

Diagram, Control

Panel,

L-

1

00

Series

Revised 5—14

5—13.

Wiring

Diagram,

Percussion

Unit, L—1

OOA

5—15

5—14.

Wiring

Diagram, Six-Voice

Percussion,

L—

100—

1

5—16

5-15.

PartsLayoutAO-41 Vibrato

Amplifier

5-17

5-16.

PartsLayoutAO-47

(126-000023)

Vibrato Amplifier

5-18

5-17.

PartsLayout,AO-42

(117-000019)

Percussion

Amplifier

..

5-19

5-18.

Parts

Layout,

AO-43

(126-000017) Power

Amplifier

5-20

5-19.

Power

Amplifier

Fuse

Location

(Canadian,

101—

000130)

....

5—21

INTRODUCTION

This

manual contains service information

for L—

100

Series

organs. The

series is

comprised

of

the following

models:

L-lOO

L-IOOA

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

1

3

note

pedal

keyboard, and

an expression

(swell)

pedal

for controlling

the

volume.

All tones

are

produced by

electro-magnetic

tone generators and

electrically

amphfied.

Selection

of tone

colors is

made by

adjusting

1

7

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 Ught

shows when

the

organ

is

:

turned

on.

^

Model

L-lOOA is

similar to

Model L-lOO,

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 tliis

manual, since

its

circuitry

\

is

independent

of

the organ.

For

Rhythm

II

service

information,

refer

to

the

Service Manual

for

Rhythm

II

I

HO~466.

Model

L—200 with inbuilt rhythm

is electrically identical to the L—

100—

2 organ.

Wiring of

the

rhythm

uni

to the

console

is

presented in Figure

5—20.

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—19.

For

convenience in

location desired information, this manual is divided into the following sections:

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

SPECIFICATIONS

DIMENSIONS:

Width,

43y2";

Height,

44^2";

Depth,

23"

WEIGHT:

215

lbs.

POWER INPUT:

140

Watts

SECTION

I

HOW

THE

ORGAN

OPERATES

1-1.

GENERAL

-

This

section

contains

a

description

of the

operating

principles

of

L—100

Series

organs.

Figures

1—1

and

1

-2

depict

the

locations

of

the

various

subassemblies.

Figure 1

-3

is a

block

diagram.

1-2.

TONE

SOURCE

-

Most

tone

sources,

such

as

strings,

reeds,

or

pipes,

produce

complex

tones.

The

Hammond

tone-producing

mechanism,

however,

generates

individual

frequencies

which

can

be

combined

by

means

of

harmonic

drawbars

to

produce

any

desired

tone

quality.

The

block

diagram,

Figure

1-3,

shows the chief

components

of

the

instrument.

Electrical

impulses

of various

frequencies

are

produced

in the

"tone

generator

assembly"

whicli

contains

a

number

of

"tone

wheels"

driven at

predetermined

speeds

by

a

motor

and

gear

arrangement.

Each

tone

wheel

is a

steel

disc

similar

to a

gear,

with

high

and

low

spots,

or

teeth, on

its

edge

(see

Figure 1

-4).

As

the

wheel

rotates,

these

teeth pass

near

a

permanent

magnet,

and

the

resulting

variations

in

the

magnetic

field

induce a

voltage

in

a

coil

PEDAL

DRAWBAR

CONTROL

TABS

LOWER

MANUAL

DRAWBARS

PILOT

LIGHT

OFF-ON

SWITCH

UPPER OR

SOLO MANUAL

LOWER

OR

GREAT

MANUAL

PEDAL'KEYBOARD

EXPRESSION

(VOLUME) PEdAL

Figure

1-1.

L- 100

Console,

Front View

SELF

STARTING

SYKCHRONOUS

MOTOR

CONTROL

SWITCH

ASSEM.

PERCUSSION

CUT

OFF ADJUST

PEDAL

CLICK

FILTER

wound

on

the magnet. This

small

voltage,

when

suitably

filtered, produces

one

note

of

the musical

scale, its

pitch

or

frequency

depending

on the

number of

teeth passing

the

magnet each second.

A note

played

on

either

manual

of the

organ consists

of

a

fundamental pitch

and

a

number of

harmonics,

or multiples

of

the

fundamental

frequency. The

fundamental

and

harmonics

available on

each

playing

key are controllable by

means

of

drawbars.

By

suitable

adjustment

of these

controls

the

player

may

vary

the

tone colors

at

will.

Several pre-selected

tones

are

also

available by

use

of

the

preset tabs.

Mixed tones

from the

upper manual and

lower manual

and pedals

go

through

the

pre-amplifier and the

"vibrato

amplifier".

Vibrato

may be

added,

depending

on the

position of the vibrato

selector

tabs.

The

tones

then

pass

through the

expression

control and

additional stages

of amplifica-

tion

before reaching the

speaker.

Percussion tones

are

produced

by

borrow-

ing a

signal

from

the

upper manual

2nd

harmonic

drawbar, 3rd

harmonic

drawbar,

or both, and

conducting

the signal

through

the

percussion

amplifier, where

its

decay

characteristics

are controlled.

A

portion

of

this

signal

is

returned

to the

respective

drawbar.

The percussion

signal

is

then combined

with the

signal

from

the

manuals

after

the

vibrato system

but

before

the

expression

control.

The control tubes

are

keyed through the 6th

harmonic key

contacts and

busbar.

The pedal tones do

not

require drawbars

for

tone

color

variation, because

they are

produced as

complex

tones

by

special

tone wheels.

The

single

pedal drawbar

adjusts the

volume

of the pedals

relative

to that

of

the manuals,

and the

pedal signal

then

is

combined with

the

signal

from the

manuals

before passing into

the

matching

transformer.

LEGEND

NOTE:

L-100

SERIES

ORGAN

AMPLIFIER BLOCKS BEARING LIKE NUMBERS

ARE

ON

SAME

CHASSIS.

L-100A

SERIES

ORGAN 'FOLLOWING CONSOLES HAVE BRILLIANCE

TABLET ADDED:

L-10.0-1

SERIES ORGAN

"OOEL

L-101

SERIAL

#41622 AND

ABOVE

MODEL L-102 SERIAL «42028

AND

ABOVE

L-100-2

SERIES ORGAN

MODEL L-103 SERIAL «43102 AND ABOVE

Block

Diagram,

IrlOQ

Series

MAGNET-

COIL OUTPUT

TERMINAL

ONE

SIDE

OF

COIL

GROUNDED

-TONE

WHEEL

COIL

Figure

1

-4.

Typical

Tone

Generator

-3.

-4.

MOTOR

AND

POWER

SWITCH.

-

The

tone

generator

assembly,

in

which

all

tones

of

the

organ

originate,

is

driven

at

constant

speed by

a

self

starting

synchronous

motor,

operating

at

1800

RPM,

located

at

the left

side

(rear

view)

of

the

console

(Figure

1-2).

(In 50

cycle

organs,

the

generator

speed

is

1500

RPM).

A

toggle

switch

(Figure

1

power

to

the

organ.

-1)

controls

TONE

GENERATOR.

-

All

tones

of

the

organ

originate

as

electrical

signals

in

the

tone

generator

assembly.

It

contains

87

tone

wheels

having

various

numbers

of

teeth,

with

suitable

gears

for

driving

them

at

various

speeds

from

a

main

shaft

extending

along

the

center.

Each

pair

of

tone

wheels

is

mounted

on

a

shaft

and

between

them

is

a

bakehte

gear

held

by

a

coil

spring,

forming

a

mechanical

vibration

filter.

As

the

gear

is

not

rigidly

attached

to

the

shaft,

any

pair

of

wheels

which

may

be

stopped

acciden-

tally

will

not

interfere

with

the

operation

of

the

others.

Adjacent

to

each

tone

wheel

is

a

magnetized

rod

with

a

pickup

coil

wound

on

it.

These

magnets

extend

through

the

front

and

back

of

the

generator,

and

are

held

by

set

screws

which

can

be

loosened

in

case

adjustment

is

ever necessaiy.

Figure

1-5

shows

the

location

of the

magnet

for

any

frequency

number.

In the

illustration

the

dotted

lines

indicate

frequencies

whose

tone

wheels

are

on

the

same

shaft.

On

top

of the

tone

generator

assembly

are

small

transformers

and

condensers,

forming

tuned

filters

for the

higher

frequencies.

They

are

not

likely

to

need

replacing.

In

case

one

filter

becomes

inoperative,

both

the

transformer

and

condenser

must

be

replaced

with a

matched

set

from

the

factory.

Figure

1—6

shows

the

location

of

^

these

filters.

A

few

frequencies

use

untuned

filters

consisting

of coils

alone.

Wiring

from

the

various

filter

assemblies

leads

to

the

terminal

strip

on

the

long

edge

of the

generator.

The

output

frequencies

of

the

tone

genera-

tor

are

numbered,

for

convenience,

in

order

of

increasing

frequency.

The

lowest,

number

§)@)@(8l)@(g)@)@@@@)@)©

\®

\@

\0

\@

\e

\®

\<s

\0

\@

\e

\@

\@

s\

@)\

@\

@\

@\

60

(56)

g)\

e

SYNCHRONOUS

MOTOR

CNO

BACK

OF GENEBATOR

(AT BACK

OF

CONSOLE)

SyNCHRONOUS

FRONT

OF

GENERATOR

MOTOR END

DOTTED LINES

SHOW

FREQUENCIES

WHOSE

TONE

WHEELS ARE

ON

SAME

SHAFT

Figure

1—5.

Magnet

Locations

on

Tone

Generator

L

1

,

is

about

32

cycles

per

second,

and

the

^

highest,

number

9

1

,

is

about

6000

cycles

per

second.

Frequency

numbers

1

to

1

3

are

used

only

for

the

pedals;

numbers

14

to

17

are

omitted;

and

numbers

18

to 91

are

used

for

the

manuals.

Figure

1

-6

showing

filter

locations

also

shows

the

termination

point

i

»

of

each

frequency,

while

Figure

5-1

shows

typical

tuned

and

untuned

tone

generators.

I

^

In

case

any

generator

frequency

is

weak

or

[

absent,

refer

to

''Practical

Service

Sugges-

tions"

for

the

procedure

to

be

used

in

locating

and

correcting

the

trouble.

1-5.

MANUALS.

-

Musical

frequencies

from

the

tone

generator

go

through

the

manual

cable

to

terminal

strips

on

the

two

manuals

and

from

them

to

the

key

contact

springs.

Each

of the

two

manuals

has

44

playing

keys,

or

approximately

SVi

octaves.

The

two

manuals

do

not

cover

exactly

the

same

pitch

range,

but

they

are

arranged

so

that

keys

of

like

pitch

are

in

line.

Middle

"C" is

the

first

C

on

the

upper

manual

and

the

key

in

line

with

it

on

the

lower

manual.

Under

each

key

are

a

number

of

contact

springs

(for

the

fundamental

and

harmonics

of

that

key)

which

contact

an

equal

number

of

busbars

when

the

key

is

pressed.

All

contact

springs

and

busbars

have

precious

metal

contact

surfaces

to

avoid

corrosion,

and

the

manuals

are

sealed

to

exclude

dust

so

far

as

possible.

In

case

a

contact

becomes

dirty

in

spite

of

these

precautions,

a

busbar

shifter

is

provided

in

each

manual

to

slide

the

busbars

endwise

and

thus

provide a

fresh

contact

surface.

(See

paragraph

4-3b).

Looking

under

the

lower

manual

on

the

left

hand

end

(front

view)

a

black

wood

end

block

will

be

observed.

One

half

inch

from

the

front

of

this

block

is

a

drilled

hole.

Within

this

drilling

is

a

small

metal

tongue

with

a

punched

hole.

Using

either

long

nose

phers

or

a

hook,

this

tongue

can

be

moved

in

and

out

and

it

in

turn

moves

the

busbars.

The

upper

manual

shifter

is

in

a

similar

place

and

access

to

it

is

from

the

rear

of

the

console.

The

key

contacts

are

connected

through

resistance

wires

to

the

manual

terminal

strips.

The

manual

wiring

chart.

Figure

1-7,

shows

how

the

contacts

of

each

key

are

connected

to

the

proper

frequencies

to

supply

the

fundamental

and

harmonics

of

that

particular

key.

The

blank

spaces

indicate

that

no

key

contact

is

used,

inas-

much

as

the

higher

harmonics

of

these

keys

are

not

required.

Since

the

percussion

control

circuit

is

keyed

through

the

6th

harmonic

busbar,

the

blank

spaces

in

this

row

have

contacts

connected

to

ground

through

resistance

wires.

The

busbars

of

each

manual,

each

one

carrying

a

certain

harmonic,

are

wired

to

the

appropriate

harmonic

drawbars

for

that

manual

through

the

"Drawbars"

tab.

NUW&ERS

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MOTOR

END

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Figure

1-6.

Filter

Locations

and

Frequency

Terminations

on

Generator

Cover

1-5

ER

MANUAL

H/

SL

RMCN

C

BUSBAR

I LAD

COLOR

FRFQUENCY

NUMBERS

B-FUND

BROWN

18

20 2

1

22

23

24 25 26

27

28 29

30

31 32 33

3 4 35 35

37 38 39

40

42

43

44

45 46 47 48

49

50

51

52

53

54

58 b

I

FUND

ORANGE

30

31 32 33

34 3 5

36

37

38

39

40 4

2

43

4 4 45 46

47 48

49 50

5

1 52 53

3

+

55

56

57 58 59 60 6

1 62

63

64

65

6 6

67 && 69 /O

7 1 72

73

3RD

GREEN

49

50

51 52

53

54

55 565758

59

60 6

1

62 63

64

65 66

67 69

70

7

1 72

73 74 75

76

77

78 79

8

0

8

1

82

8 3

84

85

86 8 7

68

8

9

90

4TH

BLUE

54 55

56

57 58 59 60

6

1 62

63

64 65 66 6

7

58 59 70

7

1

72

73

74

75

76

7 7 78

79

80

8

1

82

83

8 4

8 5

66

8 7 88 8 9

90 91

STH

VIOLET

58 59

60 6

1

62

63

64 65 66

67

68 69

70 7 1

72 73

74

75

76

7 7 7

8

79 80

8

1

82

83

84

85 86

87

88 B9 90

91

8TH

WHITE

66

67 68 69

70

7

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73

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78 79

80 8

1

82

83 84

85

86 8

7

88

89 90

9

1

2

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YELLOW

42

43 44

4

5

46

47 4 8

49

50 5

1

52 53

54 55

56

57 58 59 60 6

1 62

63

64 65 66

67

68 69

70

7

1

72

73

74

75 76

77 78

79 80

6 1

82

83

84

85

SUB-3

RD

RED

37

38

39

40

41 42

43

44 45

46

47

48

49 50 5

1 52

53

54

55'

56

57

58

59

60 6 1 62 63

64

65 66 67

68 69

70 7172

73 74 75

76

77

78 79

80

6TH

GREY

61 62 63

64 65 66

67

68 69

70

71 72

73 74 75 76

77

78

79 80 81 62

83

84 85

86

87

88 69

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KEY NUMBERS

FREQUENCY

NUMBERS

BUSBAR

LEAD

COLOR

HARmO NIC

LOWER

MAh

i8

19

20

2

1

22

23

24 25 26

27 28 29

30

31

32

33

34 35 36

37 38

39

40 41 42

43

44

45

46 47

48

49 50 5

1

52 53

54 5 5 56

57

58 59

60 6

1

BROWN

FUND

30

31 32

33

34 35 3fe

37 38

39

40

4

2

43

44

45 46 47

48 49

50

51

52

53 545556

57

58 59

60

61 62

63

64 65

66

67

68 69

70

7 1

72 73

RED

2ND

46

47 46

49

30

51 52 53

54

55 56

57

58 59

60

6

1

62

63

64 55 66

6

7

68

69

70

7

1 72

73

74 75 76

777879 80 8

1 82

83

84

85

86 87 88

89

GREEN

5TH

49 50 5

1

52 53

54

55 56

57

58 59

60 6

1

62

63

64

55

66

6

7

6S

6

9

70 7 1 72

73 74

75

76

77

78 79

80

81 82 83

84 85 86

87 88

69

90

9 1

BLUE

6TH

54 55 56

5

7 56 59 60

6 1 62

63

64 65 66

6

7

68

69

70

7

1 72

73

7

5

76

7

7 76

79 80 8

1

82 83

84 85

8 6

87

88

89

90 9

1

VIOLET

8TH

37

38 39

40

42

43 44 45

46

47 48

49 SO5152

53

54 55

56

57

58

59

60

6

1 62

63

64

65 66

67 68

69

70

7

1

72

73 74

75 76

77

78 79 80

ORANGE

3RD

42

43

44

45

46

47

48 49

50

51

52

53 54

55 56

57 58 59 60

6

1 62 63

64 65 66

67

68 69

70

71

72

73

74

75

76

77 78

79 80

81 82

83 84

85

YELLOW

4TH

*

CONTACTS

GROUNDED

THROUGH

16

OHMS

Figure

1

-7.

Manual

Wiring

Chart

1-6.

HARMONIC

DRAWBARS. -The

left group

of seven

harmonic drawbars (Figure

1

—8)

is

associated with

the lower

manual,

and

the right

group of nine

drawbars

controls

the

upper manual. By sliding

these drawbars

in and

out,

the organist

is

able

to

mix the

fundamental and

harmonics (or

overtones)

in

various

proportions. The distance a

bar

is

pulled out determines

the strength

of

the

corresponding harmonic; and if

a

drawbar

is set

all

the

way in, the

harmonic

it

repre-

sents

is not present

in

the

mixture.

Neither

manual will play unless one

of

its

drawbars

. is pulled

out at least part

of

the way

with

the drawbar

tab

pressed, or

a

preset tab is

pressed.

The

drawbars

sUde

over

1

7

busbars,

repre-

senting intensity levels. As

the drawbar

moves, its contact is

touching

some

busbar

at all times,

and

therefore

there

is a smooth

change

in volume

of

that

harmonic.

These

busbars

extend the length

of

the

draw-

bar

assembly,

and

are connected

to

the

low

impedance

primary of

a matching

transformer. Signals

from

the

high

imped-

ance secondary

of

this

transformer go

to

the preamplifier input. The matching

transformer

is

located

within the preampli-

fier chassis.

1-7-

PEDAL DRAWBAR.

-

The center drawbar

adjusts the volume

of

the

pedals. Its

opera-

tion is similar to that

of

a manual drawbar.

1-8.

PEDAL

KEYBOARD.

-The

13

playing

pedals

are operated

by the

left

foot

and

are

con-

nected

to the

lowest

1

3

frequencies

of

the

generator.

Like

the

manuals, they have

light and

dark

keys

arranged in

the standard

octave

pattern. Figure

1

—9

identifies

the

pedals and

shows

the

generator

frequency

number

associated with

each. A

single

contact

on each pedal

closes

when

the

pedal

is pressed,

thereby

allowing the

correct

generator

frequency

to reach

the amplifier.

1-9.

EXPRESSION PEDAL.

-

The expression

pedal, sometimes called

"swell" pedal

(Figure

1-1)

is

operated

by

the player's

right foot and

varies the volume of

both

manuals and pedals together.

When the

pedal

is tilted back

(closed) by pushing on

the

player's heel

the music

is

softest,

and

when pushed forward (opened)

by the

player's toe

the music is loudest.

Figure 1

-8.

Drawbars &

Control

Tabs

(Partial

View)

PEDAL CONTACTS

Jlllll

lllllll

I

Figure 1

—9.

Pedal

Keyboard

1-10.

CONTROL

TABS.

-

There are

17

tabs

on

the

L-lOO

series

instrument, each

providing

some

change

in the

instrument's

operation.

To

have the

instrument

sound

after turn-

ing

it

on, tabs

such as

FULL ORGAN and

ENSEMBLE will

place the

upper and lower

manual

in

operation. A tab is

in use

when

in the

down

position.

Functions

of

the

various

tabs

from

left

to

right as

they

appear

on the instrument

are given in

the

following

paragraphs.

1-11.

PRESET

TABS.

-

Four

tabs

are provided

for

the

upper manual and

two

for

the

lower manual. As

indicated, they

provide a

choice

of

using

the

drawbars

or playing

the

preset tones

indicated

on them.

1-12.

VIBRATO

TABS.

-

The L-lOO

series

organs

are

equipped with 3

tabs

which

vary the

vibrato

effect.

Three

degrees

of

vibrato

are available

using

the

VIBRATO NORMAL,

VIBRATO

SMALL or both

together.

VIBRATO

CHORUS

can

be

used

with

VIBRATO

NORMAL,

VIBRATO SMALL,

or both, to provide

different

degrees

of

chorus.

1-13. REVERBERATION

AND

VOLUME SOFT

TABS.

-

Several

degrees

of reverberation

are obtained

by

the

use

of

either or

both

tabs

labeled

REVERB

I

and

REVERB 11.

These tabs,

in

addition to

turning

this

feature

on,

govern

the loudness

or amount

ofrever-

beration by

a

resistive

network used in con-

juntion

with the

speaker. The

VOLUME

SOFT tab

controls

the

overall volume

of the

organ and is

especially

useful where

playing

1-14.

PERCUSSION

CONTROL TABS

-

There are

four of these

tabs

which

operate

only

when

the

upper manual

DRAWBARS tab

is

de-

pressed.

Pressing

either the

SECOND

HARMONIC

or

THIRD

HARMONIC tab

will,

when the

upper

manUal is

played,

cause

the tone to

sound

percussively (in

addition

to sustained

organ

tones).

Both

tabs

can

be

depressed,

giving

a

combination

percussive

tone.

The

FAST

DECAY

tab

causes the

percussive tones to

fade away

with

greater

rapidity.

PERCUSSION

SOFT

reduces the

volume

for

the

percussive signal.

Operation

of the

electrical

circuits associated

with

this feature

is

described

in

subsequent

paragraphs.

1-8

1-15.

L-100A

PRESET

PERCUSSION

UNIT

(See

Figure

1-10).-

When added

to

the L-lOO

series

instrument,

this unit

adds

five

pre-

voice

percussion

effects,

including

reiter-

ation in

three speeds.

It

also

provides

three

percussion

effects, "Normal

(Non-

Vibrato)",

"Vibrato",

and

"Delayed

Vibrato".

For

the

rhythm

accompaniment

it

also

provides

a

"Cymbal-Brush"

effect,

the

"Brush"

being

on the

lower

manual, and

available

when

played

in

a

legato

fashion

each time

a

key

is

depressed.

The

"Cymbal"

is

available

on

the

pedal and

sounds

each time a

pedal

is

de-

pressed.

The

"Cymbal-Brush"

control

turns

these effects on

and selects

the

"Cymbal-

Brush" volume.

1-16. SELECTOR

SWITCH.

-

With

the

Selector

Switch in

the

"Drawbar"

position,

the

signals

from

the

upper manual

harmonic

busbars

are routed

to

their

associated

drawbars

in the

upper manual group.

The

following is a

breakdown

of

the

harmonic

switching used.

1-17. HARMONIC BUSBAR

SWITCHING

AND

REITERATION

SPLIT.

-

Upper

Manual.

The

Sub-Fundamental, sub-third

and

eighth

harmonics

are not switched.

The sixth

har-

monic

busbar is

used

for percussion

keying.

With the

Selector Switch

in

the

"Drawbar"

position,

all

harmonic

busbars

are routed

to

.

their associated

drawbars.

1-18.

L-100-1

SIX-VOICE

PERCUSSION

FEATURE

(See

Figure

1-11).

-

1-19.

LOCATION OF

CONTROLS.

-

The

rhythm

controls

are located on the

right

end

block

of

the

lower manual.

1-20. VOICING.

-

The

following

voices

are

available.

BLOCK

CYMBAL

BRUSH

BONGO

TOM-TOM

CLAVES

1-21.

OPERATION

OF

CONTROLS.

-

Any

of the

six

voices

may be

played

at

any

time

by

means

of the

momentary

push buttons

associated

with

the

rocker tabs.

The

BLOCK

and

CYMBAL voices

are

pro-

grammed

into

the

pedal

keyboard

when

their

rocker tabs

are

"on".

The

remaining

four

voices

are

programmed

into

the

lower

manual

keys

when their

rocker tabs

are

on .

Chime

REITERATION

SPLIT

"A"

CHANNEL

"B"

CHANNEL

2nd

3rd
4th

(5th

to

Freq. Div.)

(1-1/4

From

Freq.

Div.)

DRAWBARS

Fundamental

Guitar

Fundamental

3rd

4th

5th

2nd

Marimba

Fundamental

2nd

3rd

4th

5th

,

Xylophone

Fundamental

3rd

2nd

4th

5th

Banjo

2nd

3rd

4th

5th

Fundamental

1-9

Figure

1-10.

HOOA

Preset

Percussion

Unit

1-10

1-22.

1-23.

The

RHYTHM

VOLUME

control, mounted

1-24.

to the right of

the rocker

tabs, regulates

the loudness

of

the

rhythm

voices

relative

to the other organ

voices.

The

organ's

expression

pedal

also

affects

the rhythm

voices except

brush and

cymbal.

The BRUSH

and

CYMBAL

voices sound

without reverberation. The

remaining

voices

are

reverberated whenever

a

REVERB

tab

on the organ's control

panel

is depressed.

EXTERNAL

EQUIPMENT.

-

The

L-lOO

Series

organs

may be

equipped with

ex-

tension

speakers,

external

inputs

and

earphones.

EXTENSION

SPEAKERS.

-

A

Hammond

Model

PR-40

Tone Cabinet

may be used

as an extension

speaker.

A

Tone

Cabinet

1-25.

Control

Kit,

P/N

AO-22625-2

is

required

for

proper

interconnections.

Installation

instructions are furnished

with the kit.

EXTERNAL

SOUND SOURCE.

-

A record

player

or

microphone

equipped

with

a

suitable

preamplifier,

or a radio,

can

be

played through

the organ's

speakers.

The

device

used

should have

an output

level of

about

1/2

volt rms

maximum,

and

should

have

its own volume

control,

since the

organ

volume

controls

will

not affect

the

signal. The

organ

may be

played

at the

same time.

To

connect

an external

sound

source,

a

Switchcraft Type

330 Fl

"Y"

connector

is

required.

Remove

the

connector

cable

from

the WH

terminal

on the

power

amplifier.

Insert

the

''Y"

connector

into the

terminal,

and

insert

cable

previously

removed

into

one

arm of

the "Y".

Connect

external

sound

source

to the

other arm.

EARPHONES.

-

hi

order

to use

earphones,

the output

jack

and

network

shown

in

Figure

1-12

are

required.

When

earphones

are

in

use,

organ

speakers are

silenced.

GN.

BLK.

Organ

Spk.

wires

47a

SWITCHCRAFT

SF-JAX #25

OR

55

ji

Use

Koss

Model

SP-3.

Figure

1—12.

Earphone

Adapter Circuit

SECTION

II

THEORY

OF

OPERATION

2-1.

GENERAL.

-

This

section

contains

circuit

descriptions

of

the

ampUfier

chassis,

and

the

percussion

attachments.

There

are

three

amphfier

assembhes

in

the

L—100

series

instruments.

On

the

upper

shelf as

viewed

from the

rear, to

the

left is

the

vibrato

amphfier,

towards

the

center

the

preamplifier

and

percussion

amphfier,

while

the

reverberation

and

power

amplifier

is

located

on

the

lower

shelf.

2-2.

PREAMPLIFIERS

(See

Figure

5-1).

-

The

pre-

amplifier

(VI)

receives

all

signals

impressed

on

the

matching

transformer

secondary,

which

originate

by

use

of the

drawbars

or

preset tabs.

Should

any

percussion

tab

be

in

use, a

portion

of

the

second,

third

or

both

harmonics

of the

upper

manual

wiU

also

appear in

the

input circuit

of the

per-

cussion

amplifier

which

will be

discussed

further on.

2-3.

VIBRATO

PHASE SHIFT

AMPLIFIER

(See

Figures

5-1

through

5-4).

-

The

vibrator

system

varies

the

frequency

of the

tones

by

continuously

shifting

their

phase.

Circuit

components

include

three

series-

connected

vacuum tube

phase

shifter stages

(V2A,

V2B,

and

V3A),

associated

saturable

reactors

(SRIOI,

SR102,

SR103),

voltage

amphfier

(V3A),

vibrato oscillator

(V4A),

and

driver

stages

(V4B, V5).

A

single

low

frequency

oscillator

(V4)

provides

the

rate

for the

vibrato

system

(approx.

6.8

CPS).

With

either the

normal

or

small

vibrato

tab

in

use,

this

oscillator

impresses its

signal on

V4,

a

cathode

fol-

lower

and

isolation

stage.

Positive

pulses

now

appear

on the

grid

of

driver

tube

V5.

The plate

circuit

of this

tube

is

in

series

with

three

saturable

reactors

located

in the

plate

and

cathode

circuits

of the

phase

shift

stages.

Irrespective

of

which

vibrato

stop is

used,

the rate

remains

constant,

but

the

degree

of vibrato

is

determined

by

the

amplitude

of

the

positive

pulse on

the

driver

tube.

The

continuous phase

shift is

accomplished

by

using

180°

out-of-phase

signals

from

the

plate

and

cathode

of each

shifter

stage

and

controUing

them

with

the

saturable

reactors.

Plate

and

cathode

resistors

are

of

equal

value

and

consequently

signals

are

equal

in

amplitude

in

each

plate

and

cathode

circuit.

The

saturable

reactors

serve

as

a

means

of

providing

a

varying

composite

of

signals

from

both

plate

and

cathode

of

each

stage,

ranging

from

virtually

full

cathode

signal

to

full

plate

signal.

The

driver

tube

plate

current

varies

from

about

.5ma

to

5ma.

at

vibrato

rate.

This

current

varies

the

degree

of

saturation

in

the

reactor

cores

and

results in

a

smoothly

varying

impedance.

At

minimum

driver

current

(when

the

voltage

feeding

driver

tube

V5

is

negative

and

driver

tube

is

nearly

cut

off) the

reactor

impedances

are

maximum

and

are

large

compared

to

the

15000

ohm

plate,

circuit

series

resistors

Rl

04,

Rl

1

0,

Rl 1 5.

Therefore,

under this

condition

most

signal

will

emanate

from the

plate.

(The

reactors

being

virtually

short

circuited

by

the

plate

circuit

series

resistors)

and

phase

shift

will

be

maximum

-

approaching

1

80°

-

since

plate

voltage

is

180**

out

of phase

with

grid

voltage.

At

maximum

driver

current

(when

voltage

feeding

driver

tube

V5 is

positive

and

driver

tube is

conducting

maximum

current)

the

reactors

are

saturated

and

their

impedance

is

a

minimum

—small

compared

to

the

1 5OO0

ohm

plate

circuit series

resistors

R104,

Rl

10,R1

15.

Therefore,

most

signal

will

emanate

from

the

cathode

(the

saturated

and

low

impedance

reactors

virtually

short

circuit

the

plate

circuit

series

resistors)

and

phase

shift

will

be a

minimum

-

approach-

ing

0°

—

since cathode

voltage

is

in

phase

with

input

grid

voltage.

Between

these

extremes,

the

phase

varies

smoothly

under

control

of

the

saturable

reactors.

^

The continuous

change in phase

is

equi-

valent to a continuous frequency vari-

ation, and thus the frequency

varies up

and

down

at

vibrato rate.

PERCUSSION AMPLIFIER (See Figures

5-1

through

5-4).

-

The

2nd or

3rd

harmonic

signal,

or

both, when these

tabs

are de-

pressed, will be impressed upon the input

of the 2N306 transistor.

The

output

of

this transistor is resistance

coupled to the

one

half

of

VI 1

which

acts

as

a control

tube and is normally

conducting, so

when a

t

key

is depressed the percussive

note

first

sounds loudly.

It

passes through the control

tube and a band

pass

filter

and

is

impressed

on

the grid terminal of

VI.

Immediately

the note begins

to

fade away,

giving the characteristic percussion effect.

This

fading

is

accomplished

as

follows: When

jf

either

harmonic

stop is

depressed

the

key-

i

ing

wire

(normally

held at

plus 28 volts

through anti-spark resistor R21

5)

is

con-

nected

to

solo manual

6th

harmonic draw-

bar.

When a

key

is pressed

this

keying

hne

^

is

grounded

through the

key

contact

and

tone

generator

filter.

This

virtually

grounds

the

grid

and plate

of VI 1

(connected

as a

diode)

open-circuiting

the

tube

and

isolating

[

the

control

tube

grid

circuit.

The

grid

of

the

control

tube

drifts

from

its

operating

potential

of about

25

volts to a

cutoff potential

potential

(about

plus

1

5

volts) at

a

rate

determined by

the

time

required

for C210

3

to

discharge

through

R219 and

R409.

The

percussion

signal is now

blocked.

No

percussion

notes

can sound

until

all

keys

of

2-5.

the

solo

manual

are released and

the control

grid

again rises

to

plus

25

volts.

The time

of

this rise (that

is,

how

quickly

the

control

tubes

turn on

again

after the

key

is

released)

is

the

time

required to

charge

C2

1

0

to

plus

25 volts

through

R2

18.

When

a

''percussion"

tab is

pressed

the

solo

manual

second,

third,

or both

harmonic

*

manual

busbars

are

connected

to

the

green

percussion

signal

line and a

5

OHM series

resistor

is

connected

between

the

manual

bus

wire and

drawbars

providing

for

a sus-

tained

signal in

addition

to

the

percussion

signal.

The

6th

harmonic

drawbar

is dis-

connected

from

its

lead

wire

and

this

wire

(which

is

grounded

through

the

generator

magnets

when any

key

is

pressed)

is

used

to

turn

off the

control

tube.

Therefore the

6th

harmonic is

not

available

on the

upper

manual

when

the

percussion is

in use.

When

the

PERCUSSION

SOFT

tab

is

down,

it

reduces

the

volume by

shunting

resistor

R224 into

the dividing network

composed

of R222 and

R223.

The

PERCUSSION FAST

DECAY

tab

determines

how fast the sound

fades away

after

a

key

is

pressed.

When

the tab

is

up,

resistor R21 9

discharges capacitor C21

0,

re-

ducing

the D.C. voltage on the control tube

grids to

cut-off

in

about

2-1

/2

seconds.

When

the

tab is

down, resistor

R409 is

shunted across

resistor R21

9,

reducing

the

time to discharge

capacitor C210

and

there-

by

reducing

the D.C.

voltage

on the control

tube

grid

to cut

off

in

less

than one-half

second.

With either

or both

2ND

and 3RD

HAR-

MONIC

tabs

down,

the harmonic drawbar

wires

are

connected

to

the

-green signal

input

wire of the percussion amplifier. Either or

both signals are fed back to their respective

drawbars

by

resistors

R410

and

R41

1

which

are shorted

out when the

percussion

tabs

are not

in

use.

The percussion signals

as

well

as

the

signals

from

the

vibrato and phase shift amphfier

are combined in the input circuit of

cathode

follower

VI

and are

sent

to

the

expression

control, which is also connected to the

input

of

the

reverberation

and power

amplifier.

REVERBERATION

AND

POWER

AMPLIFIER

(See

Figure

5-4).

-

The

combined signals

from both

prior

mentioned

amplifiers

(after

the

expression

control has acted

upon them)

are

impressed

on the

grid

of V6 and in

turn

on V7, the

reverberation

drive

tube.

After

passing

through the

reverberation unit

the

signal is

again

ampUfied

by V6

and

passed

through

a

resistive

network,

components

of

which

are variable,

permitting

the

reverbera-

tion to

be available

in

several intensities

and

"off.

From

the input

of V7

(the

reverberation

drive

tube)

a signal is

shunted

around

the

reverberation

unit and its

control

features which provide a path

for

the

non-

reverberation

signal.

The input

of

V8

re-

ceives

this

signal

as

well as

a

reverberative

signal. This

common

input

line also

contains

the

VOLUME

SOFT tab

circuitry.

The

output

of

the

second

half of V8 is

a

phase inverter driving push-pull output

tubes V9

and VI 0. A feedback circuit from

the

output transformer

secondary

(R336

and

R337)

makes the

pedal

response

more

uniform

by

reducing

speaker resonance.

I

R336

is adjusted

at

the factory.

2-^6.

POWER

SUPPLY (See

Figure

5-4).

-

The

power

supply uses a 5U4 rectifier

tube

with conventional filtering

circuit.

2-7.

L-10QA PERCUSSION

VOICING CIRCUITRY

(See

Figure

5-5).

2-8.

MODE

SWITCH

-

With the ''Mode

Switch"

in any

of the reiteration

positions, the

harmonics

necessary to produce

the

"Chime",

"Guitar", and "Banjo" are all

fed into the "A"

reiteration channel only,

while the "Marimba"

and

"Xylophone"

effects

feed

harmonics

into both the

"A"

and

the

"B"

channels.

This

spht

into the

"A" and "B"

channels

only occurs

with the

use of reiteration.

Without

reiteration,

all

effects are routed into the regular

percussion

system. The two reiteration

channels are

identical.

You

will

note

that across the

secondary

windings

of the

two input

trans-

formers

is located

a

field-effect

transistor.

These gates

Q300

and

Q303,

are fed alter-

nating pulses from

a

bistable

multivibrator

which

supplies alternate

pulses

to

each

one

of

these

gates. That

is; one

is On, while the

other

is

off.

These gates

shunt the

signal

to ground, thereby

making

the channel

inoperative.

These

individual signals

are

further amplified

by

a

one

stage transistor

amplifier,

Q301

for

the

"A"

channel, and

Q302

for the

"B" channel.

They

are

then

mixed

together

and fed

to a common

amphfier,

Q307,

which

in turn feeds

this

percussion signal

to

the input

side

of

the

swell

pedal.

The

multivibrator

which

supphes the keying

pulse

for

these two

gates does not run

continually,

but

rather

is

turned

off

and on

each time

a

key

is

depressed

on the upper

manual. The

multi-

vibrator

consists

of

Q305

and

Q306.

The

multivibrator

rate varies

with

the

applied

base

voltage.

This

voltage

is applied through

the "Mode

Switch"

and R684

and R685.

Q304

provides

the

necessary

switch

pulse

to start the

multivibrator.

NOTE

Whenever

the

reiteration

is used,

it completely

bypasses the percus-

sion

section of

the AO—

42

amplifier.

With

the "Mode Switch" in

the

"Normal",

"Vibrato",

or

"Delayed Vibrato"

position,

the various pre-voiced

percussions

are

routed

to

a

percussion preamphfier

made

up

of

Q314

and

Q313.

These amplified

signals

are

then

routed

into

the regular

Hammond

percussion

system at

the

col-

lector of

Q201.

With

the "Mode Switch"

in the "Normal"

position all percussion

voices

sound

as normal; that is, they have

no

vibrato.

NOTE

To obtain the following vibrato

effects

it

will

be necessary

to

de-

press

one or

both of

the

VIBRATO

tabs.

With the "Mode

Switch" in the

"Vibrato"

position,

a

portion of

the

percussion

signal

is

taken from

the input

side of

the

Expres-

sion pedal and

routed

through R670,

the

"Mode

Switch", and

is then

fed

to

the grid

of

VI A

(Pin

2).

Here

the percussion

voices

are

amplified

and

fed

to

the

vibrato

phase

shift ampUfier.

All

voices

so

routed

now

appear with

vibrato.

With the

"Mode Switch"

in the "Delayed

Vibrato"

position,

a portion

of

the percus-

sion

signal

is

taken from

the

input

side of

the Expression

pedal, and routed

to a

voltage

divider

made

up

of R682

and

R681.

This weak signal

is

fed

to

the

base

of

Q3

1 2.

It

will

be noted that

the

emitter of

this

stage is not bypassed and that

the output

of

this

stage is

relatively

low. During keying,

after

a predetermined

time

lag

(.5

seconds),

the

charge

on C631

is depleted

by

Q308

and

Q309.

With this

charge depleted,

Q308

and

Q309

stop conducting

and

their

respective collectors

assume the

supply

potential

+

1 2

V. This

+

1

2V.

from

the

collector of

Q309

is

now apphed

to

the

base

Q3

1

0,

thereby

placing

Q3

1 0 and

Q3

1

1

in

a

state

of

conduction.

With

Q3

1 1 now

conducting, C633

is

placed across

the

emitter resistor

of

Q3

1 2.

This

materially

increases

the

gain

of this

stage,

and as

the

percussion

is

dying

away,

feeds

this ampli-

fied

portion of

the

fading

percussion signal

through

the

"Mode

Switch",

and

R683

to

the

grid

of

VI A

(Pin

2).

There the

signal

is ampUfied

and

fed

to the

Vibrato Phase-

Shift amphfier.

All voices

so

routed

now

appear

with

a

vibrato

tail-off.

Two positions

of

the ''Mode Switch",

"Vibrato",

and "Delayed

Vibrato"

also

effect

the

normal Hammond

percussions

I

when

they are in use

(See

Note

above).

2-9.

FREQUENCY

DIVIDER

-

When

using

the

"Chime"

voice,

it is

necessary

to create

a

\

1-1/4

harmonic for

the proper

reproduction

of

the "Chime"

tone.

This

is accompHshed

by routing

the

5th

harmonic

into an

ampli-

fier

made

up of

Q315

and

Q316. Q317

'

rectifies

and

further

amplifies

this

pulse

which

is then

fed

to

a two-stage

frequency

divider,

made

up

of

Q318,

Q319, Q320,

\

and

Q321.

The

output

of

this

second

I

frequency

divider

is then

routed

back

to

I

the "Selector

Switch",

and

is used

as

one

of

the

harmonics

in

the "Chime"

voice.

NOTE

j

Because

a

frequency

divider can

cv

I

handle only one frequency

at a

time,

any attempt

to play two

or

more

"Qiime" notes

at a

time will

result

in

distortion.

^

2-10.

CYMBAL

AND

BRUSH

-

The

"Cymbal-

Brush"

switch when

in

the

"off"

position

disables

the keying

functions

necessary

to

produce

the "Brush"

effect.

With the

"Cymbal-Brush"

switch

in any one of

the

"on"

positions,

the 8th harmonic of

the

lower

manual

is disabled

and

this

harmonic

busbar

is used for

keying

the "Brush"

effect.

The

pedal

signal (keying)

contact

is used

to

activate the "Cymbal"

effect

each

time

a

pedal

is

depressed.

,2-11.

BRUSH

KEYING

-

With

the

"Cymbal-Brush"

'

switch

in any

of

the

ON

positions,

the

base

of

Q322

is

routed

now

to

the

8th

harmonic

busbar

in

the lower

manual.

Anytime

a

key

is

depressed,

the base

voltage

of

this tran-

sistor

is routed

to

ground,

and this

stage

'

stops

conducting.

The

attendant

rise

in

collector

voltage

is

impressed

on one

plate

of

C608.

The

other

plate

of

C608

responds

by

driving

excess

electrons

off

to

ground

through

resistor

R624.

The

resultant

posi-

tive

voltage

is then

fed

through

D203

to

the

base of

Q323,

the

"Brush"

gate.

To

the

base

of

this

"Brush"

gate is

also fed

the

noise

from

the

noise

generator

Q324. This

noise

is

now

tuned

in

the

collector

circuit

and

fed

to the

"Cymbal

and

Brush"

ampUfier

i

which

comists of

Q325

and

Q326.

2-12-

CYMBAL

KEYING.

-

Anytime

a

pedal

is

depressed,

the

pedal

signal

is routed

to the

pedal

drawbar.

A portion of

this

same

signal

is also fed

to

Q327

and

Q328.

These

stages

amplify

and

shape

the

signal

and feed

it

through

R61

2

to

the

base of

Q330,

and

through

R613

and D205

to a R/C

storage

network

and

the

base of

Q329.

The

signal

developed

across

R616,

the

emitter

resistor

of

Q330,

is

rectified

by

D204

and

this

posi-

tive

voltage

is

applied

to the

base

of

Q331,

the

"Cymbal"

gate,

turning

it on. At

the

same

time,

the

output

of

Q328

is being

rectified

by D205

and

slowly

appUed

to the

base of

Q329.

When

Q329

is

biased

into

conduction

it

depletes

the

base

bias nor-

mally

supplied

to

Q330

through

R612

and

Q330

stops

conducting.

In

this

state,

no

signal

is

available

at the

emitter of

Q330

to be

rectified,

and

Q331,

the

"Cymbal"

gate,

slowly

turns

off.

To the

base of

this

"Cymbal"

gate

is

also

fed

the

noise from

the

noise

generator,

Q324.

This

noise

is

tuned

in the

collector

circuit of

Q33

1 and

fed

to

Q325

and

Q326

the

"Cymbal

and

Brush"

amplifier.

2-13.

BRUSH AND CYMBAL

AMPLIFICATION.

-

After

being ampUfied

by

Q325

and

Q326,

the

"Brush

and Cymbal"

signals

are

routed

to a

voltage

divider

consisting

of

R604, R605,

and

R606. It

is

then tapped

by the switch

and

routed

to

R602

the

overall level

control.

This

is

located

on

a terminal

strip on the

lower organ

shelf,

near

the

AO—

43

ampli-

fier. The

wiper of

the overall

level control

(R602)

now feeds

into the AO—43

ampli-

fier through R601

and C318

to

Pin

7

of

V8. To enhance

the "Brush

and Cymbal"

effects, a

small high frequency

speaker

is

attached

to the main ampHfier.

It

is located

under

the

lower

right hand end

block on

the organ.

2-14.

POWER

SUPPLY.

-

Power

supply

chassis

is

suppHed

with

+340

volts DC

from

AO-43

amplifier. +80

volts required for

percussion

assembly

is obtained from

voltage

divider

R690, and R69

1

.

+

1

2

volts

is obtained

from

Zener

Diode

D201.

2-15.

L-100-1

SIX-VOICE

PERCUSSION

CIR-

CUITRY.

-

2-16.

POWER

SUPPLY

(See

Figure 5-7).

-

Power

supply

components

are

located in

the

power

supply

chassis

assembly

(127-7

thru

-9). All necessary

DC

supply

voltages

for

the

rhythm

unit

are supplied

by this

chassis.

The

output

voltages

are 30

V DC,

15

V DC, and

5.5 V

DC. The 5.5

V

output

is

not used

in

the

Model

L-

100-1

organ.

120

V

AC

50/60

Hz

is

supplied to

the

power

transformer

from an

external source.

The

secondary

AC voltage is 40

V AC,

which is

then

rectified

by

the

full wave

bridge

of diodes

D

1

00,

D1

0

1

,

D

1

02

and

D103. This

DC voltage is

then

filtered

by

the

combination

of

RlOl,

R103,

ClOOA,

CI 01

and

appUed across the 30

V DC

Zener

diode

D104.

The

30

V DC is the supply

voltage

for the

amplifier

stages

Q106,

Q107

and

Ql 08 on the

rhythm

PWB

and

the

reference

voltage for

the 1 5

V

DC and

5.5 V DC suppUes.

The 30 V DC

is

supplied

to

the voltage

divider of

R107

&

R108

and

fed to

the voltage regulators Ql

00 &

Ql

02,

the output

of

which is the

1

5 V

DC which

is

used to supply all

other

circuits

on the

rhythm device.

The 30

V

DC is also supplied

to the

voltage

divider

R106

&

R105, and

fed

to

the

2-

emitter

follower QlOl

,

the emitter

output

of

which is

5.5

V

DC.

QlOl

is used as a

voltage

regulator and in conjunction

with

ClOOB provides the

filtering

for

the 5.5

VDC.

2-17.

PUSH

BUTTON CIRCUITS (See

Figure

5-6).

One side

of each push button is connected

thru R200,

2.2K ohm

resistor

to

the

15

V

DC

supply.

The 1

5 V DC

is

available to the

push buttons at

all times, and

if one

is

de-

pressed

at

any time,

that

particular voice

will

appear at the output.

When any

of

the

push buttons

is

depressed, that button

apphes 1

5 V DC

to

the base input

of

a

phase shift oscillator.

As

an example, if

the

BLOCK

push button

is depressed, 1 5

V DC

is

apphed to

the

junction of RIOOB and capacitor ClOOB.

This signal

is

differentiated by

CI

OOB and

the

resulting

pulse

is

fed thru DIOOB

and

Rl 05 to the

base

of Ql

OOB, turning

it

on.

This signal

is

fed

back to

the

base,

inverted

by

the phase shift network

C103B, C102B,

C104B, R106B,

and

R107B,

and

will

be

regenerative

for

a

period

of

time

determined

by

RIOOB,

ClOOB, and RIOIB.

The

decay-

time

of

the

collector output depends

upon

the values

of ClOlB,

R105B

and

R102B.

2

The

output

is

coupled through capacitor

C105B,

resistor

R104B, and

capacitor

CI 20

to

the base

of

ampUfier

stage

Ql

07,

and

after

amplification

by

Q

107

and

Q108,

it

is

connected to

R203, the

volume control.

TOM-TOM,

BONGO,

and

CLAVES

are

similar

in

operation.

The

frequencies

of

the

oscillators

are determined by

the

values

of

the

components in

the

phase shift

network.

When

the

BRUSH push

button is

depressed,

+

1

5 V DC

is

suppUed

to

the junction of

Rl 16 and

CI 1

1

,

and this

supphes

bias

through

D102 to

the base

of

Q103,

tuming

"on"

the

one shot

multi-vibrator stage,

Q103

and

Q104

for

one complete

cycle.

The

Brush Gate

transistor

Q

105 is

turned

"on"

for

a

period

determined

by

CI 13 and

R120

of the

multi-vibrator stage.

This

apphes

positive

bias

through R123, D104,

R124

to

base

of

Q105,

turning on

Q105

and

allowing

white

noise to

appear

on col-

lector

of Ql

05,

tuned by

CI

15 and

LI

01,

and

this

signal

is

then

routed through

CI

1

7

and

output level

control

R126

and

R127

to

hiss

amplifier

Q106.

LOWER

MANUAL KEYING CIRCUITS (See

Figure

5-6).

-

The lower manual

buss

line

is

connected

through

CI 24

and the

base

of

Q109,

which

is a

pulse

ampUfier

stage.

Re-

sistor

R147

provides base bias

to

the

stage,

so

that with

no key depressed,

the collector

is

at

approximately

4.5

V

DC. CI24and

R145 is a

differentiating

network

which

puts

a

pulse on the base

of

Q109.

This

pulse

is

amphfied

by

Q109,

and instanta-

neously the

collector of

Q

109 rises

from

4.5 V DC to

approximately

1 1

V DC This

change

is

routed through

R149

to

the

base

of Ql

10,

which at

an emitter

voltage

of

5.5

V and base

bias

of 4.5

V

was

"off".

With

1

1 V on

its base,

QUO turns

"on", and

its

collector, which was

at

1

5

V

drops to

5.5 V. This

change is

coupled

through

CI

26

and

R153 to

the base

of Qlll,aPNP

which

has

been

biased

"off" through

R152

and

R153. The change in bias turns "on"

QUI

and the

collector has an

instanta-

neous

output

of

+

1 5

V DC of

about 2

milliseconds

duration. This

trigger pulse

is

defined as

the

lower manual

trigger pulse.

The

pulse

is

routed

through

whichever

LOWER

tabs

are "on" to

trigger

the

selected

voices.

Output is

obtained

as

described

in

Paragraph

2—17.

19.

PEDAL KEYING

CIRCUIT (See

Figure

5-B).

-

A signal

of

approximately

75

mV

P-P

from the pedal

keyboard

is

connected

to

the input

T4. The first

two stages

using

transistors

Ql

&

Q2

are basically

ampli-

fiers

providing

a

+

1

3 V

square

wave

pulse

for

each

input

cycle.

The first

+

1

3

V

square

wave

pulse

appearing

on

transistor

Q2

collector

turns

on

Q4

providing

a

+

1

3

V pulse

at

output

terminal Tl

1

.

At

the

same

time

C4 is

charged

through R6.

This

icharging

time is

long

enough

to

delay

the

conduction

of

Q3

until

after the

first pulse;

then

Q3

conducts,

cutting

off

Q4

before the

second

pulse

can be

passed.

Effectively,

lieach time

a signal is

applied to

the

input

at

T4,

one

pulse

appears at

the

output termi-

j

nal

(Til),

which

connects to

terminal

F

of

voice

generator

board

124-0001

14.

Ql

15

is

normally

off.

The input at

T'

is

fed

through

R

163

to

the

base

of

Ql

1

5

to

turn

the

transistor

on.

When

Ql

1

5

is

on,

the

DC

voltage

at

its

collector

drops

from +

15V

to

Zero

V.

Note

that

pin

'G'

is

jumpered

to

pin

'C,

and

that

both

are

common

to

Ql

1

5

The signal

entering pin

is

fed

through

R160

to

the base

of Ql

14,

which is

nor-

mally

in

the "on"

condition

with

no

pedal

pressed

(collector at

OV DC).

When a pedal

is

pressed, the

negative

signal

applied to

the

base

turns

"ofV Ql

14,

and

the

collector

voltage

rises

to

+

1 5

V DC.

Point

"D" is

routed to

point

"A" and

coupled

through

CI

27 and

Rl 56 to

the base

of Ql

1

2.

Ql

1

2

which

is

normally

"off

is

turned

''on",

and its

collector

voltage

drops to

zero. The

collector

signal

of

Ql

1 2 is

then

fed

to

the

base

of

PNP

Ql

13,

turning

it "on'\

and its

collector

switches

to

+

1 5

V DC. This

+

1

5

V

DC pulse

on

the

collector

of

Ql

13

is desig-

nated as

the

pedal-down

pulse,

and is

routed

through

the

BLOCK

and/or

CYMBAL tabs,

when "on" to

trigger the

selected

voices.

Output

is

obtained

as

described

in

Paragraph

2-17.

SECTION

III

DISASSEMBLY

3-1.

GENERAL.

-

This

section

contains descrip-

tions

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.

3-5.

mounting screw; unhook

key from screw

and lift out

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

white key.

DRAWBAR

CONTACT

SPRING.

-

To

remove

a drawbar

contact

spring

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

upper

manual.

c.

To

remove

a

black

key, loosen its key

mounting screw,

lift control

panel

assembly

and

hft

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

hft

out

white

key.

NOTE

If

removal

involves the

lowest

three

keys, it will be

necessary

to

remove

or

loosen

drawbar

assembly.

See

Paragraph

3—6.

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 1

/4"

box

ratchet, loosen

key

mounting

screw.

g.

To

remove a black

key, loosen its

key

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 draw-

bar

assembly.

3-6.

DRAWBAR, DRAWBAR

KNOBS OR

DRAW-

BAR ASSEMBLY.

-

To

remove

any

of

these,

proceed according

to the following.

a.

Remove

four

screws

which 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 which secure it

to

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

f

manual

proceed according to

the

following.

a.

Remove

four

screws

which

secure

metal

cover

on

control

panel

assembly.

b.

Unsolder

black

wire

from

full

organ

tab

switch

going

to

drawbar

assembly.

c.

Disconnect

nine

colored

wires

emanating

f

from right

end

of

upper

manual

which

terminate

at

upper manual

control

tab

switches.

d.

Dismount

AO-41

and

AO-42

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 cUck

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

check

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

assembly

to

base.

Control

panel and

drawbar

assembly can

be

folded

over and

rest

on

top

of

amplifiers.

k.

Replace

control panel

mounting

screws.

1.

Prop up

front of

upper

manual so

that

its

terminal

strip

is

accessible.

Be

careful

when

raising and

lowering

manual

that

its

terminal strip is

not

damaged

by

rubbing

lower

manual

keys.

m.

Unsolder

manual

cable

from

terminal

strip.

Lower

manual into

normal

position.

n.

Carefully

lift

manual

assembly

out

of

console.

3-8.

LOWER

MANUAL.

-

To

remove

lower

manual

proceed

aeeording

to

the

following.

a.

Perform operations a.

through

e.

of

Paragraph

3—7.

b.

Disconnect

9

colored

wires

emanating

from

right end

of lower

manual which

terminate at

lower

manual

control

tab

switch.

c.

Remove

four

screws

from

under

manual

assembly

(front)

which

secure

terminal

cover.

d.

Remove

lower

manual

end

blocks by

removing

two

screws

through

manual

frame

and

one screw

through

bracket

on

cheek

block.

e.

Unsolder

manual

cable

from

terminal

strip.

f. Tilt

upper

manual

up

from

front.

Remove

two

hexagonal

bolts that

secure

lower

manual

to

case

work.

g.

Loosen

four

hexagonal

head

studs

securing

lower

manual

to

front

rail.

(In

reinstaUing

manual

tighten

these

last.)

h.

Lift

out

lower

manual.

3-9. GENERATOR.

-

To

remove

generator dis-

connect

organ

from

power

source,

then

proceed

according

to

the

following.

a.

Remove

generator

power

panel

cover.

b.

Unsolder

all

wires

on

power

panel

except

yellow

and

grey wires

to

motor

and

starting

condenser.

c.

Dress

generator-to-manual

cable

and

generator-to-pedal

cable

down

and

un-

solder

from

terminal

strip.

d.

Unsolder

grey

wire

which

goes to

pedal

cUck

filter and

remove

heavy

grounding

wire

(black).

e.

Remove

four

hexagonal

bolts

which

secure

generator

to

mounting

angles.

Lift

out

generator.

3-10.

MOTOR.

-

To

remove

motor

disconnect

organ

from

power

source,

then

proceed

according

to

the

following.

a.

Remove

generator

power

panel

cover.

b.

Unsolder

grey

wire

to

motor.

c.

Unsolder

red

and

black

wires

on

starting

capacitor.

d.

Compress

coupling

spring

between

motor

and

generator and

remove

spring.

e.

Force

off

spring

clamp

which

secures

motor

to

mounting

frame.

Lift out

motor.

3-11.

PEDAL

KEYBOARD.

-

To

remove

pedal

keyboard

proceed

according

to

the

following.

a.

Dress

down

generator-to-manual

and

generator-to-pedal

cables,

unsoldering

latter.

b.

Remove

two

screws

in

lower

back

of

console

and

three

screws

between

ampli-

fier

and

front

of console.

c.

Lift

console

and

pull out

keyboard.

(When

reinstalling

pedal

keyboard

replace

two

screws

in back

of

console

first,

3-2

leaving

them

loose

until

remaining

screws

are replaced.)

3-12.

SWELL ASSEMBLY.

-

To

remove

swell

assembly,

perform

steps a.

through

d.

If

replacement

of

assembly is

required,

perform

step e.

a.

Remove

tv^o leads

with

white

coded ends

from preamplifier

and main amplifier.

b.

Remove four wood

screws securing swell

housing

cover

to case

and lift out

cover.

c.

Remove four

screws

securing swell

pedal

assembly to case

work. Swell

assembly

is now loose

and can

be picked up and

removed from

back.

d.

Swell potentiometer

can

be removed

at

this

time

if

necessary and

will

require

an

Allen

1/16"

wrench.

e.

Replacement

for more dependable swell

operation

can be

made by

ordering Part

Number

123-000021

from

the

factory,

and

proceeding

as

follows.

1.

Remove Expression Control housing.

2.

Unplug long

shielded lead

from

Per-

cussion

Amp.

Chassis and short

shielded lead

from Power Amp.

Chassis.

3. Remove

four

screws

securing

Expres-

sion

Control

Chassis

to

floor

of

cabinet.

4.

Remove

Expression Control

as

one

unit.

5. Place new Expression

Control in

posi-

tion and secure

with

original

screws.

6.

Plug

long shielded

lead

into

Percus-

sion Amp. jack and short lead into

Power

Amp.

Jack.

7.

Using accompanying Terminal Strip,

splice two Brown wires from Expres-

sion Control into

Blue

&

Gray

6.3V

filament

leads originating

in

6

pin

rectangular

plug

on

Power

Amp.

Chassis.

Secure

Terminal

Strip to

cabinet

floor with

small

wood

screw.

8.

Replace

Expression

Control

Housing.

NOTE

If

swell

assembly

is

replaced

as

directed,

circuitry

will conform to

Figures

5—3

and

5—4.

3-13.

TO

REPLACE

A

BROKEN TAB.

-

Proceed

according

to

the

following.

a.

Remove

four

screws

which

secure metal*

cover

on

control

panel

assembly.

b.

Remove

two

Phillips screws

from front

of

control

panel

which hold bank of

switches

associated with tab to

be

replaced.

c.

Remove

lock washer

from

either

end

of

switch assembly, and pull

rod out

so

it

just clears

broken

tab.

It

may

be neces-

sary

to tilt

assembly so

that

free end of

rod

will

clear

adjacent

switch assembly.

d.

Remove

remains of

broken

tab

and

insert

new piece.

NOTE

A small

bronze spring

washer

will be

found

between tab

and

one side

of

switch

assembly.

Be

sure this

is

re-

inserted with

new tab.

3-14.

PILOT LIGHT

OR

POWER

SWITCH.

-

Dis-

connect organ from power

source,

then

proceed according to the following.

a.

Remove

four screws which secure

metal

cover

on

control

panel assembly.

b.

Replace bulb with No. 12

GE

6.3 V .15A

miniature

2 pin.

c.

To

replace

power

switch, unsolder two

black leads

from generator power

panel.

d.

Compress

springs on sides

of

switch and

push through

front of

control panel.

3-15.

PERCUSSION

CIRCUITRY,

L-100A.

-

With

the

exception

of

power

supply

and

terminal

strip

assembly,

Figure 5

—

13,

the percussion

circuitry is

mounted on the

lower

left end

block.

If

access to

end

block circuitry is

required,

remove control knobs

before

re-

moving end block

from

organ.

3-16.

SIX-VOICE

PERCUSSION

CIRCUITRY.L-1

00-1

The power

supply, 1

27-000007

and

pedal

control

board

assembly,

063-042051,

are

mounted

on

the

left (rear

view)

wall of

the

console.

The rhythm voice

board, 1

24—0001

14,

is

located

on

the

bottom left (rear

view)

of

the

console.

SECTION

IV

PRACTICAL

SERVICE

SUGGESTIOIMS

4-1.

GENERAL.

-

This section contains

perform-

ance

standards, adjustment

procedures, and

troubleshooting information.

NOTE

Before

making any

checks

or

ad-

justments involving ampHfiers,

test

all

tubes to be sure they

are oper-

ating properly.

4-2.

ORGAN

PERFORMANCE CHECK.

-

To

prepare

the

organ for

performance

check

proceed

according to

the following.

a.

Place

all

tabs in

up

(ofQ

position.

b. Push

drawbars

in to Umit of

motion.

c. Set swell

pedal for

maximum output.

d. Connect

meter

to speaker terminals.

NOTES

At certain

steps in

the following

procedure,

conditions

other than

above may

be specified.

Return

controls

to

above

conditions

as

each step is

completed.

Drawbars,

pedals

and keys are

called

out

by

number,

beginning

with

No.

1,

at left end of

row.

4-3.

EtiUIPMENT

REQUIRED.

-

a. VTVM,

Commander

870

or equivalent.

b. Oscilloscope, Tektronix

503

or

equivalent.

4-4.

PROCEDURE.

-

a.

Depress UPPER

DRAWBARS

tab and

pull

drawbar

No.

1

to

position

8.

Play

lowest

C,

on upper^

manual (Frequency

25)

and

observe

meter. If

output is

not

between 1.6V

and

2V

rms,

adjust

GAIN

ADJUST

on

power

ampUfier

to bring

output

into

range.

b.

Maintain

conditions of step

a.

Depress

VOLUME SOFT

tab. Output

should

drop

to

range of

0.69 to

0.9 volts

rms.

c.

Set pedal drawbar at position

8.

Depress

lowest

C

pedal.

Output

should be between

4V and

5.5V rms.

NOTE

If

output

is

not

within

specified

range, select Rl,

Figures

5

—

1

through

5-4,

from

1.8i2

to 21

Q.

to

bring

output

into range.

d. Maintain

conditions

of step

c. Depress

VOLUME

SOFT

tab.

Output should

drop

to 0.8V

to

1.5 V

rms.

e.

Return

VOLUME

SOFT

tab to "up"

position.

Maintain

other

conditions of

step

c. Play

all

pedals

to be sure

output

changes

smoothly

from note

to note.

f.

Make

upper

manual preset

listening

check.

Hold

down F,

A,

C chord near

center

of

upper

manual.

1.

Trumpet.

Set

up upper

drawbars to

00

6688 888. Press

TRUMPET

preset

and

then

UPPER

DRAWBARS preset.

The

musical

quality

should

be identical.

2.

Clarinet.

Set

up upper

drawbars

to

00

8080 800. Press

CLARINET

preset

and

then UPPER

DRAWBARS preset.

The musical

quaUty

should

be

identical.

3.

Full

organ.

Set

up upper

drawbars

to

86

8868

446.

Press

FULL

ORGAN

preset

and

the

UPPER

DRAWBARS

preset.

The

musical

quality

should

be

identical.

g.

Make

lower

manual

preset listening

check.

Hold

down F,

A,

C chord near

center

of

lower

manual.

1. Set up

lower

drawbars

to

6644 222.

2.

Press

ENSEMBLE

preset

and then

LOWER

DRAWBARS

preset.

The

musical quality

should

be identical.

h.

Percussion

cutoff

control

and

output

checks.

1.

Cut-off.

With

only THIRD

HARMON-

IC, FAST

DECAY,

and

UPPER

DRAWBARS

tablets

depressed

and

all

drawbars

pushed in,

hold

down

lowest

C

key

on

upper

manual

and

adjust

percussion

cut-off

control

on

preamplifier

chassis

to point

at

which

output signal

is just barely

audible.

2. Output

voltages.

With only

UPPER

DRAWBARS

and

SECOND

HAR-

MONIC

tablets

depressed,

press

lowest

C

key

on

upper

manual.

Output

volt-

ages

across

speakers

should

be

between

3.0V and

5.5V

rms. With

PERClMBN

SOFT

tablet depressed,

output

should

be 1.5V to

2.8V

rms.

i.

Vibrato check.

Depress

FULL ORGAN

tab.

Hold

down

F,

A, C

chord

near

center

of upper

manual.

Depress

VIBRATO

SMALL tab and observe

vibrato

effect.

Then, in addition,

depress

VIBRATO

NORMAL

tab. Vibrato

effect

should

increase.

In

addition,

press

VIBRATO

CHORUS tab.

Vibrato

effect

should

be-

come

more pronounced.

NOTE

Later organs,

Figures

5—2

through

5—4, are

equipped

v^ith

vibrato

width

potentiometer

R131.

Ad-

just

if vibrato

effect is too narrow

or too broad.

j.

Reverberation check.

Depress

FULL OR-

GAN tab.

Hold

down

F,

A,

C

chord

near

center of

upper manual.

Add

REVERB

I

tab.

Observe that reverberation is heard

as

chord is played and released. Add

REVERB II tab.

Reverberation should

be

increased relative

to REVERB

1

tab

as

chord

is played and released.

k.

Microphonics and Hum check.

1 .

Tap each

tube

and replace

it

if

there

is

ring or

howl

in

the

speaker with

expression pedal

maximum

and

VOLUME SOFT

tab

not depressed.

2.

Hum

in

speakers

with

expression

pedal

maximum

and

VOLUME

SOFT

tablet

not depressed

must be very low

in

vol-

ume

and not measure

more than 15

mV rms.

If

hum is

excessive,

see para-

graph

4-22.

NOTE

On

L-

100-2

the SILENT-SOUND

tab

on

Rhythm II

must be

in SI-

LENT position.

VIBRATO.

-

To

check

vibrato proceed ac-

cording to

the following.

a.

Pull out

upper manual

2'

drawbar to

position

8. All

other

drawbars

in.

De-

press

UPPER DRAWBARS

tab.

b.

Remove the phono cable from the BN.

phono jack located on

the preampUfier

chassis.

Connect

the

scope

VERTICAL

INPUT

to the

phono

plug removed.

c.

Remove the phono

cable

from

the BK.

phono

jack

located on the vibrato phase

shift

ampUfier.

Insert into the

BK.

phono

jack an

adapter

with

two

phono

jacks

and

one phono

plug.

Reconnect the

phono

cable (black) into

one

of

the

adapter phono jacks

and

connect the

scope EXT.

TRIGGER

IN binding

post

to

the remaining adapter

phono jack.

d.

Set scope

controls

as follows:

1.

TRIGGER:

SOURCE

-

EXT.,

COUPLING

-

AC;

SLOPE

+

2.

HORIZONTAL SWEEP

-

0.2

msec/cm.

3.

VERTICAL

SENSITIVITY

-

0-2

volt/cm.

e. Hold

down

key

#7

(frequency

#60)

on

the

upper manual.

f.

Adjust

the

TRIGGER

LEVEL

control

for

a stable pattern.

g.

Adjust

the VARIABLE sweep

time

control until one complete sinewave

covers 4

cm.

h. Adjust

the VERTICAL

VARIABLE con-

trol for a display height

of 4

cm.

i. Depress the

VIBRATO NORMAL tab.

Adjust

the VIBRATO

WIDTH

control

for

a

total phase shift

swing

of

2 cm.

(refer

to

Figure

4-1).

If

VIBRATO

WIDTH

control

does

not give satisfactory

result,

select

R133, Figure

5—1

through

5-4

between

220a and IK.

2

CM

/2CM

Figure

4-1.

Vibrato

Adjustment

Waveform

NOTE

Phase

shift can be read best if

waveform is

centered so that the

center

peak of

the

sinewave

coin-

cides

with

a

graticule line.

j.

Release

VIBRATO NORMAL tab.

Single

wave must be

centered

±

Vi

cm. as

shown

in

Figure

4—1.

k. Disconnect external leads and adapter.

Reconnect

phono

cables to proper jacks.

If

an

oscilloscope

is

not

available,

make

the

following

listening

test.

Depress

FULL

ORGAN

tab.

Hold

down

F,

A,

C chord

near

center

of

upper

man-

^

ual.

Depress

VIBRATO

SMALL

tab

and

observe

vibrato

effect.

Add

VIBRATO

NORMAL

tab

and

observe

increased

vibrato.

Add

VIBRATO

CHORUS

tab

and

observe

that

vibrato

effect

becomes

more

pronounced.

4-6.

L-100A

PERCUSSION

PERFORMANCE

CHECK.

-

To

check

performance

of

L-IOOA

percussion

unit,

whether

factory

installed,

or

added as

a kit,

proceed

accord-

ing

to

the

following.

\.

a.

Selector

Switch

Operation

1.

With

selector

switch

in

DRAWBARS

position,

cymbal-brush

switch

OFF,

mode

switch

in

NORMAL

position,

organ

function

should

be

normal.

2.

DRAWBARS

position

-

with

upper

manual

DRAWBAR

tab

depressed

and

holding

down

middle

C

key,

pull

out

all

drawbars

in

order,

starting

with

the

highest

one.

Note

that

pitch

of

sound

goes

down

each

time

with

the

excep-

tion

of

sub-3rd

drawbar.

Return

upper

DRAWBAR

tab

to

OFF.

3.

Percussion

level

-

with

mode

switch

in

VIBRATO

position,

selector

switch

in

Marimba

position,

lower

manual

DRAW-

BAR

tab

depressed

and

lower

drawbars

registration

8800

000

and

swell

pedal

maximum

loudness,

the

level

is

checked

by

comparing

level

of

upper

manual

to

level of

lower

manual

when

depressing

middle

C and

E

keys in

a

percussive

manner.

Level

should

be

approximate-

ly

equal.

Variation

heard in

level

in

the

reiteration,

normal,

and

delayed

vibra-

to

positions

of

the

mode

switch are

normal.

Notice

a decrease

in

level

when

PERCUSSION

SOFT

tab

is

depressed

in

all

but

reiteration

modes.

4.

Percussion

voices

of

the

selector

switch

are

checked

for

harmonic

content

by

comparison

with

lower

manual

regis-

tration.

Play

middle

C

and E

keys

except

when

comparing

chimes

which

should

be

checked

using

middle

C

key

only.

5.

CHIMES

should

be

identical

to

drawbar

registration

0888

000,

except

that

1-1/4

harmonic

will

be

missing

from

the

drawbar

registration.

6.

GUITAR

should

be

identical

to regis-

tration

8088

80Q.

7.

MARIMBA

should

be

identical

to

reg-

istration

8800

000.

8. XYLOPHONE

should

be

identical

to

registration

8080

000.

9.

BANJO

should

be

identical

to

regis-

tration

0888

800.

NOTES

When

the

harmonic

is

used

to

form

the

percussion

voice,

then

the

cor-

responding

drawbar

on

the

upper

manual

and

(keying)

drawbar

#8

will

be

inoperative.

In

CHIMES

position,

drawbar

#7

will

also

be

inoperative.

CHIMES

& GUITAR

decay

time

approximately

3

seconds,

other

percussion

voices

sUghtly

less

than

1/2

second.

In

VIBRATO

&

DELAYED

VI-

BRATO

positions of

mode

switch,

all

percussions

will

have

the

long

decay

time

(3

seconds).

b.

Mode

Switch

Operation

(Vibrato

Functions)

1

.

All

control

panel

tabs

and

drawbars

in

OFF

position.

2.

Selector

switch

to

GUITAR

position.

3.

Mode

switch

NORMAL

position

-

play

chord

on

upper

manual

and notice

absence

of

vibrato

effect.

4.

Mode

switch

to

VIBRATO

position,

depress

vibrato

normal

tab

-

play

chord

on

upper

manual

and

notice

vibrato

effect.

5.

Mode

switch

to

DELAYED

VIBRATO

position

-

play

chord

on

upper

manual

^

and

notice

that

vibrato

effect

begins

approximately

.6 of

a second

delayed

in

time,

after

chord

is

pressed.

c.

Mode

Switch

Operation

(Reiteration

Functions)

1. Selector

switch

to

CHIME

or

GUITAR

position.

2.

Mode

switch

to

FAST

position,

and

pressing

key

on

upper

manual

produces

a

reiterative

sound,

repeating

at

the

rate

of

approximately

1

1.2

HZ.

3.

Mode

switch

to

MEDIUM

position

-

playing

as

above,

produces

a reitera-

tive

sound

with

rate

of

approximately

7.7 HZ.

4.

Mode

switch

to

SLOW

position

-

play-

ing

as

above,

produces

a

reiterative

sound

with

rate

of

approximately

5.4

HZ.

5. Notice that

if selector

switch

is turned

I

to MARIMBA or XYLOPHONE

posi-

!

tions,

a

reiterative

sound

of

different

^

quality

is

heard. The two

harmonics

used in these voices are turned on and

off

at

opposite times.

This

is known as

"alternate reiteration",

d. Cymbal-Brush Switch

Operation

1^

1

.

With

lower manual

DRAWBARS

tab

switch depressed,

and CYMBAL-

BRUSH

switch

off,

lower manual

t

drawbars should function normally.

I

2. With CYMBAL-BRUSH

switch to any

on-position,

drawbar

#7

will be

inoperative.

I

3. With lower manual

DRAWBAR

tab

I

up,

and

Brush

&

Cymbal

switch

in

LOUD

position,

depress

BRILLIANCE

tab,

playing

any lower manual

key

repeatedly

(other than highest 6 keys

i

on right-

side

of

manuals). The

result

should be a

percussive

hiss sound

of

1.0

V

±

3 db rms measured

across

12"

speaker

leads. R602

may be

adjusted to

obtain the proper

levels.

R602

is located on

terminal strip

assembly,

AO—3

1213—1.

4.

With

Cymbal and Brush

switch

in

LOUD position,

play

any pedal

repeat-

edly,

and

notice

percussive

hiss

sound

of 1.25

V±3db rms.

5.

Notice

that

when BRILLANCE fab is

.

turned

off,

volume

of

Brush and Cym-

r

bal is decreased.

d.

Press

BRUSH push button

at

about

5

times per second.

Adjust R

126

to ob-

tain

a meter indication of 2.2 to 2.8

V

rms.

e. Press

TOM-TOM push button at about

5 times per second.

Adjust

R

134 to

ob-

tain

a

meter

indication of 1.3 to

1.7

V

rms.

4-9.

ONE VOICE

IS SILENT.

-

Check

the

following:

a.

Connection

to corresponding pin of

PWB,

124-0001

14,

See

Figure

5-6.

b.

If

connections

O.K,, check for

+15

V

DC

at

pin when

push

button of missing voice

is

held

down.

c.

If voltage is

missing,

check connections

to

push button

switch,

rocker

tab, and

rhythm power

supply.

d.

If

voltage

is

present,

trace

associated

voice

circuitry.

NOTE

If

failure

is in

Brush and/or

Cymbal voice,

check

Q

1

0

1

.

4-10.

PROGRAMMED

VOICE

DOES

NOT

SPEAK.

-

If any

voice speaks

when push

button

is

pressed,

but not from

programmed source

(manual or pedal, as

appUcable), check

rocker

switch

and associated wiring.

See

Paragraphs

4—

1

3 and

4—14

also.

4-7.

L-100-1 SIX-VOICE

PERCUSSION PERFORM-

ANCE CHECK AND

TROUBLESHOOTING.

4-8.

OUTPUT LEVEL

ADJUSTMENTS!.-

The

rhythm volume levels are

set

at the

factory,

and

will

normally require

no adjustment.

In

case

it

is found necessary

to

replace

a part

on the

rhythm board,

124-0001

14,

adjust-

ment will

be required.

To

adjust output

levels,

proceed

according to

the

following.

A VTVM,

Millivolt Commander,

Model

870,

or

equivalent is required.

See Figure

5—6

for

locations

of

controls.

a.

Set all

tabs

and rocker

sv/itches

to "up"

or "off

positions.

Set swell pedal and

'f

RHYTHM

VOLUME

control

to maxi-

mum output.

b.

Connect

VTVM

across

main

speaker

leads.

e.

Press

CYMBAL

push

button at about

5

p

times

per second.

Adjust

Rl

13 to

obtain

a meter

indication

of

2.2

to 2.8

V

rms.

4-11.

ALL PERCUSSIVE

VOICES SILENT.

-

(Hiss

voices

speak.) Check

Q107,

Q108,

and

associated circuitry.

4-12.

BOTH

HISS

VOICES

SILENT

-

(Percussive

Voices Speak.) Check

Q106

and associated

circuitry. Check

Q

1

0

1

.

4-13.

NO

VOICE RESPONSE FROM PEDALS.

-

Check

pedal

keying pulse

circuits.

Para-

graph

2—19.

4-14.

NO VOICE RESPONSE FROM

MANUAL.

-

Check manual

keying

pulse

circuits.

Para-

graph

2—18.

4-15.

NO

PERCUSSION

OUTPUT.

-

Check con-

nections to percussion power supply.

Check

power supply

outputs.

^

4-16.

TROUBLESHOOTING.

4-17.

ORGAN

DOES

NOT

PLAY.

-

a.

If the

generator

motor

is

not

turning

and

the

tubes

do

not

Ught

when

the

switch

is

I

in the

"on"

position,

cheek

the

power

I

wiring,

power

switch,

line cord,

line

cord

plug,

and

wall

outlet.

b.

If

the

generator

turns

and

the

tubes

light,

^-

but

no

sound

can be

obtained

with

all

controls

in

playing

position,

the

most

likely

source

of

trouble

is

the

ampUfier.

In

most

respects

this is a

conventional

I

amplifier

circuit,

and

the

schematic

dia-

grams,

Figures

5-1

through

5-4,

will

enable

the

service

man

to

locate

the

trouble.

4-18. KEY DOES

NOT

PLAY OR

HARMONIC

IS

MISSING.

-

This may

mean a

dirty

key

contact, a

broken

connection,

or

a

dead

note

in

the

generator.

The

steps below

will serve to

isolate the

trouble.

NOTE

Checks a

through

i,

following,

must be

performed

with

the

'

DRAWBARS tab

depressed.

a.

Ordinarily

only

one

of the

several

frequen-

cies

used

on the

key

will be

missing.

This

can

be

determined

by

holding

the

key

and

operating

each

drawbar

for that

manual,

observing

on which

drawbar

the

key

fails

to play.

Reference to

the

manual

wiring

chart.

Figure

1-7, will

tell

which

fre-

quency number

is

missing.

b.

See whether the

same

frequency

is miss-

ing

where

it is

used

on

other

keys

of the

same

manual.

The

wiring

chart

will

tell

with

what

other key

and

what

other

drawbar

you

should

get

the same

fre-

quency.

If

it

is

missing

on one key

but

not

on

others,

a

key

contact

is

probably

dirty.

In

some

cases it may

be

cleared

by

striking

the key

1 5

or

20

times

in a

^

rapid

staccato

manner to

loosen

the

dirt.

If this

procedure

is

not

effective,

adjust-

ment

of

the

busbar

shifter

for

that

manual

will

clear

it.

(See

paragraph

1-5.)

This

will

slide

the

busbars

endwise

so

they

r

present a

clean

contact

surface.

In extreme

cases,

it may

be

necessary to

hold

down

.

the

faulty

key while

making the

adjustment.

c.

If

the

frequency is

missing

on

all keys

of

1

one

manual

but

not

on the

other

manual,

I

look

for

a

break

in

the cable

connecting

one

manual to

the

other.

d.

If the

frequency

is

missing

on both

manuals, check the

manual-to-generator

cable

or the generator

itself.

e.

The

output

of any

single

frequency

on

the

tone

generator

may

be

checked by

pulling out any

drawbar

and

connecting

a

clip lead

from the back end

of the

drawbar

to the

generator

terminal

in

question. See

figure 6

for

location

of

all generator

terminals.

If

the

generator

is all right, the

note

will play

loudly.

CAUTION

Never

test

the tone

generator

with an

outside

source

of current

such

as a

continuity

meter,

as

serious

damage

may result to

the

sensitive

filter

transformers

and

permanent

magnets. By

the

above

method,

all

necessary

tests

of the

tone

generator

may be

made

with

the

current supplied

by

the

generator

itself.

f.

If it

fails

to

play,

try

touching

the

clip to

the

input

side

of the

filter coil

(not

the

grounded

tap)

and the

input side

of the

filter

condenser

(Figure

1—6)

in order

to

check

these

parts.

Disconnect

the

con-

denser

to

eliminate

the

possibility

of a

grounded

transformer.

If

the

signal

is

still

missing

at

the

magnet

coil

terminal,

it

means

that

the

tone wheel

is

not

turning,

the

coil

is

defective,

or

the

magnet

is

not

properly

adjusted.

g.

If the tone

wheel

is

not

turning,

the

frequency

of the

other

wheel

on

the

same

shaft

will also

be

missing

(with

the

exception

of

a few

wheels

which

are

alone).

On

the

generator

magnet

location drawing

(Figure

1-5),

the

two

frequencies

whose

numbers

are

connected

by

a

dotted

line

are

on

the same

shaft.

Another way

to

check

the

wheel

is to

remove

the

dampening

pad

under

the

generator

(it

is held by

the two

long

channels

which

form the

generator

frame)

and

feel the wheel

with

your

finger to

see

if it

is

turning. Each

wheel

is

located

di-

rectly

behind

its

magnet,

shown

in

Figure

1-5.

h.

If the

magnet

coil

is

defective,

the

generator

must

be

returned

to

the

factory,

as

replacement

of a

coil

necessi-

tates

dismantling

the

entire

generator.

i.

It is

possible,

although

unhkely,

that

the

magnet may

have

become

loose

and

moved

so

far

from

the

wheel as

to

make

the

note

inaudible.

It may

be

adjusted

as

described

in the

following

paragraph.

4-19.

ONE

NOTE

IS

WEAK.

-

4-21.

FULL

VOLUME

PEDAL

CIPHER.

-

4-20.

a.

Trace

the

note

as

described

in

the

pre-

ceding

section

to see

whether

weakness

is

due to

dirty

contact,

poor

connection,

defective

filter

or

reduced

output

of

magnet

coil.

Check

at

each

point by

comparing

intensities

with

higher

and

lower

frequency

numbers.

b.

It

is

possible

that

one

or

more

notes may

be

acoustically

weak,

due

to

the

room

and

the

furnishings,

although

the

actual

signal

level is

equal

to

that

of

adjacent

notes.

This

can

be

checked

by

reading

voltages

of

the

various

notes

on

an

output

meter

connected

to

the

voice

coil

terminals

on

the

amphfier.

All notes

will

not give

equal

output,

but

voltage

should

vary

smoothly

from

note to

note.

In

this

test

variations

of

less than 30%

should

be

ignored.

c.

Each

magnet

is

set

at

the

factory

by

tapping

it

gently, with

the set

screw

partially

loosened,

while

observing

an

output

meter.

Experience

has

shown

that

the

magnets

seldom

need

adjustment

and

that

setting

them

without

proper

equipment

involves

danger

of

damaging

both

magnet and

wheel.

Therefore

it is

not

recommended

that

the

service

man

attempt

this

adjustment.

PERCUSSION NOTES WEAK,

DO

NOT

PLAY,

OR DO

NOT

DECAY

PROPERLY.

-

a. Adjust

percussion

cutoff control

with

expression pedal

wide open,

VOLUME

SOFT

tab

up, upper DRAWBARS tab

down, and

drawbars

pushed in,

THIRD

HARMONIC

tab

down, and

FAST

DECAY

tab

down. Hold

down

first C

key on upper

manual

and adjust

percus-

sion

cutoff

control

to the exact point

of cutoff or silence.

b. Check

tube

VII.

c.

Always adjust

percussion

cutoff control

after replacing VI 1

(

1

2AU7).

a.

It is

possible

to make a

black

pedal

lock

down and

play

continuously

by

striking

it

very

hard at

an

angle so

that

it

moves

sidewise

as well

as

downward.

This

will

never occur

if the pedals

are used

pro-

perly, as only

slight

pressure with

the

toe is

required

for playing.

b.

A

pedal

locked

down

in this way

will

remain

visibly

depressed

and

tilted.

It

can

be

released by

pressing it down

very

hard,

with a

slight

pressure

opposite to

the

direction

of tilt. No

permanent

damage

will result.

4-22.

HUM.

-

a.

A loud

60

cycle or

1 20 cycle

hum

in the

speaker

may

come

from

some

nearby

electrical

appliance, as

explained

on

the

instruction

card

which

accompanied

the

instrument.

It

may be

picked

up by

the

matching

transformer

or the

console

wiring.

Hum

from this source

will disap-

pear

if

you

remove the BK

plug

from

the

AO-41

chassis. It may

be

eliminated by

moving

either

the

console or

the

appliance.

b.

Any

other hum

must

originate

in the

amplifier

circuit,

and can

generally be

cured

by

replacing

one

or

more

of the

electrolytic

condensers.

c.

In case hum

originates

in either

amplifier

but is not

due

to the

electrolytic

con-

densers, its source

can be

isolated

by

successively

removing

tubes or

by

ground-

ing

successive

points in the

signal

circuit.

4-23.

REPLACING

TUBES.

-

a.

The vacuum

tubes

are

all

standard

radio

types and

can

be tested

in the usual way.

Figures

5-15

through

5-18

show

the

location

of tubes in

the

amplifier.

b.

If

tube

VI 1 is

replaced,

check

percussion

cutoff

adjustment

as

explained

in

para-

graph

4—

4h.

4-6

SECTION

V

DIAGRAMS

r

5-1.

GENERAL.

-

This

section

contains

schematic

diagrams

to

illustrate

the

text and

provide

information

necessary

to

proper

organ

servicing.

5-1

in

POWER

SUPPLY

CHASSIS

(127-000007

ThIW

OOOOO^

Figure

5—7.

Schematic

Diagram,

L-100-1

Percussion Power Supply

•15V

R5

063-042051

PART NO.

TEM

NO.

PftRT

NAME

REMARKS

OOb-041578

TERHINftL

BOMD

ftSSMir

414-040092 3

CAPACITOt,

TANTAUH

CI

1.0

MFD.

414-040012

CAMCirn.

TDNTAUM

C2.C3.C4

.10

m.

5

425-01

0J92 b

CAPACITOR.

CGRtMIC

C5

390 rr^mU

425-010232

CAPKITOR.

CENMIC

C6

82

mm^J

«

CAPACITOR.

CERWIC

C7

A-IO fr.m-tJ

Aoo-OZioii

1

eesi-sToe..

Pixeo

600-020571

10

RESISTOR. FIXED

R16

22000

6aM)20491

11 RESISTW.

FIXED

Ri

looon

600-020971

12 RESISTOR, FIXED

R3,R4,R7

lOOK

600-020731 13 RESISTOR, FIXED

R5,R10

10

K

600-020811

RESISTOR.

FIXED

R11.

22K

600-021131 "TT RESISTOR. FIXED

K"* 470 K

600-021211

16 HrE^ISTOR. FIXED

R13.R14

1.0 »CG

600-021351

17 RESISm, FIXED

R2

3.9 MS

600-021231 18

RESISTOR, FIXED

R8

2.2 KS

<4iOO-O2077l

001-021133 20

TRfl»6ISTCR Q1.Q2.Q3,Q4

21

001

-026030 22

DIODE

Dl

23

202-000004-07

»24

OA, S.C.

SXIO

WIRE

BLK

'

202-010004-07 25

«24

OA. S.C.

SXID

WIRE

BRN

202-020004-07

26

•24

OA. S.C.

SXID WIRE

RED

2Q2-040004-07

27

i>24

OA. S.C.

SXID

WIRE

TEL

2W-2200Q2

28

«22

GA. S.C.

SaiO

WIRE

BARE

ai1-04IB4

29 UIRE t

PIN

ASSBK.T

CR*

0l5-(O33(». 30 ROSIN CORE

SOUn

u:

Dl

0

r

I

R9

/r;;?<ooi-i

OOUTPUT

TO TERN.

T-E" ON

P.C.

BO.

T

.124-000114

RIO

^J^r-r

10K

—"

*

L

6

f I

OTO

-OTO

OfEN

TERMINAL

(BETUEEH

CRN A

6RA

UIRES)

82pf

IN niEAMP.

PERC.

SWITCH

0

POWER SOPPLT

PLUG

TEM

(30V)(

"2

»««>

Lto

P.C. BO.

.12,

«»«C2MOMM

«

Hk

063-042051

A

FIGURE

5-8.

SCHEMATIC

DIAGRAM

^-

AND

PARTS

LAYOUT,

PEDAL

CONTROL

BOARD

5-10

PEDAL

QRAWBAR

!

TTflljinTTlTTJflTU

POWER

TEHMINALS POWER

7S

74

52 51

_

.11141 tH [ii [f

11111141

Uliitll HiHli"

iH tHiilil

HB

tihH

HifHi

hililii

<

"

la

s

E3

^

: [ZZ

n^n^zzz

I

L

TONE

6ENERAT0fR

FIGURE

5-9.

WIRING

DIAGRAM,

L-lOO

ORGAN

PEDAL

SWITCH

ASSEMBLY

III

•z

<

o

o

o
>

o

h

o

Q

>

ID

r

o

I-

u

lil

z
z

o

St-

t

3o

' '

"

1^

z^^

o

QQ

UJUJ

zz

zz
oo

QQ

.

^^"^^

CM

If)

2
O

P

u

ul

2

2

O

o

in

z

o

:5

0

z

cy-J

uJO

a

*o

IL

z

o

2^

a

o

ZZ

Of

-"^

iilfl

i

O

O

i a

n.

-

o..

Z

Old

>

o

^

Z

bj

Z

-C

a

o

4t

_JltJ

J

2-QvJ

2^

^

^

^

^

u.

^

1^^

DC

Si

ooo

Z~«H

I

094-041160

D

Figure

5-14.

Wiring

Diagram,

Sftt-Voice Percussion, L-100-]

Lu

—

cvl

fO

-J

O

O

O

cll

<

az

(£. a:

1^

U)

CO

I/)

D

^

<

a3a

9110

^

\

UJCL OrO

CO

Figure

5-15.

Parts

Layout AO-41

Vibrato

Amplifier

5-17

o

p

UJ

—

OJ fO

1

o

o

o

<

or

CC

oc:

Figure

5-16.

Parts

Layout

AO-47

(126-000023) Vibrato

AmpUfier

MODEL

LIOI

CONSOLES

SERIAL

NO.

41622

AND

ABOVE

MODEL

LI02

CONSOLES

SERIAL

NO.

42028

AND

ABOVE

MODEL LI03

CONSOLES

SERIAL

N0^43I02

AND

ABOVE

5-18

l®n=n=j"

So

Q.u>

Figure

5-^17.

Parts

Layout,

AO-42

(1

17-000009)

Percussion

AmpUfier

5-19

Figure

5-18.

Parts

Layout,

AO-43

(126-000017)

Power

AmpUfier

FIGURE

5-19

POWER

AMPLIFIER

FUSE

LOCATION

(CANADIAN,

101-000130)

5-21

SECTION

VI

L-SERIES

PARTS

LIST

INDEX

CONTROL

PANEL

ASSEMBLY

6-3

Stop

Switch Base

'

6—3

Manual

Stop

Switch Assembly

6-3

Preset Switch

Assembly (Lower

Manual)

6—3

ftreset

Switch

Assembly

(Upper Manual)

6—3

Percussion

Switch Assembly

6-4

Vibrato

Switch

Assembly

•

6-4

Reverberation,

Volume,

Brilliance

Switch Assembly

6-4

LOWER

MANUAL

ASSEMBLY

6-5

UPPER

MANUAL

ASSEMBLY

6-5

Flaying

Keys

6-5

GENERATORS

MOTOR

ASSEMBLIES

6-6

PEDAL

KEYBOARD

&

SWITCH

ASSEMBLY

6-6

Terminal Panel

Assembly

(Long)

,

6—6

Terminal Panel

Assembly (Short)

6—6

Key

Channel

Assembly (Long)

6-6

Key

Channel

Assembly

(Short)

6—6

PREAMPLIFIER

ASSEMBLY 117-000009

(AO-42)

6-7

VIBRATO AMPLIFIER

ASSEMBLY 126-000023

(A047)

6-7

POWER

AMPLIFIER

ASSEMBLIES

126-000017

(AO-43)

6-9

Power

Transformer

Assembly

120V 60Hz

6-9

Power

Transformer Assembly 120V

50Hz

6-9

Power Transformer

Assembly

234V

50-60Hz

,

6-9

Output Transformer

Assembly

6-9

Tubes

6-9

PERCUSSION PRESET

ASSEMBLY

(L100A)

6-10

Power

Supply

Chassis

6—10

Speaker

Assembly

6—10

Marked Endblock

6—10

SIX-VOICE

RHYTHM

EIMDBLGCK

Rhythm

Printed

Wiring

Board

Assembly

6-10

Lower Right

Hand Endblock

Assembly

6-11

Power

Supplies

6—12

Pedal Control

Board Assembly

6-12

6-1

AUTOMATIC

RHYTHM

ASSEMBLY

(RHYTHM

W

DRAWER)

,

6-13

Control

Assembly

6—13

Voice

Generator

6—13

Wire

&

Plug

Assembly

6-13

WOODWORK

6-13

Llll-1

6-13

LI

12-1

6-13

L122-1

6-13

L133-1

6-13

L143-1

.

6-13

L212-1

6-13

L222-1

6-14

MISCELLANEOUS

Cable

Assembly

(Generator

To

Manuals)

6—14

Reverberation

Unit

Assembly

6-14

Endblocks

6-14

Speakers

6-14

L-200

Parts List

Index

6-15

CONTROL PANEL

ASSEMBLY

120-000011

Panel

Assembly

Stop

Switch

Base

Screw (Stop Switch

Base

Mounting)

"S"

Clip

(For

Control

ftnel Switch

Cover)

Line

Switch

Lampholder

Assembly

Lamp

6.3V

Pilot

Light

Lens

Push on Clip

(For

Lens)

Felt Washer

Alundnum

Fofl Tape

Shim

(For

Line

Switch)

Screw

(Control

Panel Mounting

-

10

Used)

Washer (Used

on

Control

Panel Screws

-

10

Used)

Manual Stop

Switch

Assembly

Mounting

Block

Assembly

Contact

Spring Assembly

Stop

Slide

Stop

Channel

Drawbar

Stop

#4-24x3/8

Round Head

Screw

(Drawbar

Knob

Mounting)

Stamped Stop

Knob

16'

Stamped

Stop Knob

8'

5-1/3'

4'

2-2/3'

2'

1-3/5'

1-1/3'

r

Stop Knob

-

Black

(Early

Production Only)

Stop

Knob

-

Ivory

(

Early

Production

Only)

Stop

Knob

-

Brown

(Early

Production Only)

Oamp

Spring

Terminal Lug

Twisted Pair & Cap

Assembly

(Console Output to Preamplifier)

§2

Binder Head

Machine Screw

(For Drawbar Stops)

PRESET

SWITCH

ASSEMBLY (LOWER

MAMUAL)

008-024391

Switch

Panel

&

Bracket

Aisembly

Cancel

Lever

Assembly

Mounting

Bracket

Lever Mounting Bracket

Control

Tab

(Drawbars)

Control Tab

(Ensemble)

Plastic

Tie

Tubular

Clip

Shaft

Spring

Washer

Sems.

Round Head

Machine Screw

Flat Head

Madiine

Screw

Stamped Stop

Knob

Stamped Stop

Knob

Stamped

Stop

Knob

Stamped

Stop

Knob

Stamped

Stop

Knob

Stamped

Stop

Knob

Stamped

Stop

Knob

061-027350

041-

025778

823-041714

013-024298

008-034791

016-034440

016-022885

016-031454

013-031468

042-

020820

039-031450

033-043006

845-

070318

999-000061

12&«00041

063-025776

012-027488

028-032049

025-027829
025-040198

901-030514

031-034331

031-034333

031-034337

031-034338

031-034339

031-034340

031-034341

031-034342

031-034343

025-035570

025-035571

025-035572

012-027613

007-022320

011-036624

846-

010414

008-024614

060-037187

035-024205

035-024335

031-036481

031-036482

013-031744

013-028002
020-037240

999-000151

821-040314

8394)40214

PRESET

SWITCH

ASSEMBLY

(UPPER MANUAL)

008-024392

Switch

Panel

&

Bracket

Assembly

(Drawbars,

Trumpet, Clarinet)

Switdi

Ptoel

&

ftracfcet

Assembly

(Full Organ)

Cancel

linkage

Assembly

008-024613

0084)24626

0604)37190

6-3

Mounting

Bracket

035-024205

Lever

Mounting

Bracket

035-024335

Control Tab.

(Drawbars)

031-036481

Control

Tab.

(Trumpet)

031-036483

Control Tab.

(Clarinet)

031-036484

Control Tab. (FuU

Organ)

031-036485

Tubular

Clip

013-028002

Shaft

020-037238

Spring

Washer

999-000151

Terminal

Lug

007-035151

Sems.

Round Head

Machine Screw

821-040314

PERCUSSION

SWITCH

ASSEMBLY

008-024393

SWITCH

PANEL

&

BRACKET

ASSEMBLY

(SECOND

HARMONIC,

THIRD

HARMONIC)

008-024615

SWITCH

PANEL

&

BRACKET

ASSEMBLY

(FAST

DECAY,

PERCUSSION

SOFT)

008-024617

Mounting

Bracket

Lever

Mounting Bracket

Control Tab

(Second

Harmonic)

Control Tab

(Thkd

Hannonic)

Control

Tab (Fast Decay)

Control Tab

(Percussion

Soft)

Spring

Washer

Tubular

Clip

Shaft

Terminal

Lug

Flat

Head

Machine Screw

Sems.

Round

Head

Machine

Scxew

Resistor

2.2M^

R409

Resistor 4.7^2

R410,R411

035-024205
035-024335

031-036486

031036487

031-036488

031-036489

999-000151

013-028002

020-037238

007-024137

839-040214
821-040314

600-021291

600-021561

VIBRATO

SWITCH

ASSEMBLY

008-024394

SWITCH

PANEL

&

BRACKET

ASSEMBLY

(VIBRATO

SMALL)

008-024616

SWITCH

PANEL

&

BRACKET

ASSEMBLY

(VIBRATO

NORMAL,

VIBRATO

CHORUS)

008-024617

Mounting

Bracket

035-024205

Lever

Mounting Bracket

035-024335

Control Tab.

(Vibrato

Normal)

031-036490

Control Tab.

(Vibrato

Small)

031-036491

Control Tab. (Vibrato

Chorus)

031-036492

Plastic Tie

013-031744

Terminal Lug

007-024137

Shaft

020-037238

Tubular

Clip

013-028002

Spring

Washer

999-000151

Flat

Head

Machine Screw

839-040214

Resistor

2.2Meg

R403

600-021291

Resistor

3.9Meg

R404

600-021351

Resistor

6.8Meg R402

600-021411

REVERBERATION,

VOLUME,

BRILLIANCE

SWITCH

ASSEMBLY

008-025i49

Switdi

Ftoel

&

Bracket

Assembly

(Reverb U

Volume

Soft)

008-024617

Switch

Panel & Bracket

Assembly

(Reverb I)

008-024604

Switch Panel &

Bracket Assembly

(Brilliance)

008-024610

Mounting Bradcet

035-024351

Lever Mounting Bracket

035-024335

Control Tab.

(REVERB

I)

031-036493

Control Tab.

(REVERB II)

031-036494

Control

Tab.

(VOLUME

SOFT)

031-036495

Control

Tab.

(BRILLIANCE)

031-036496

Plastic

Tie

013-031744

Shaft

020-037239

Spring Washer

999-000151

Tubular

Clip

013-028002

041-027176

Flat

Head Machine Screw

839-040314

Sems.

Round

Head

Machine Screw 821-040314

Resistor

lOOK

R407

600-020971

Resistor 270K R406

6004)21071

Resistor 820K R405

600-021191

Resistor 4.7Meg. R408

600-021371

Capacitor Ceramic

.OOlSjuf

C402

425-010542

Capacitor

mifjf

C401

401-020342

Shielded

Lead Assembly

(Vibrato Chorus Cable

-

Blue Plug)

011-034752

Shielded

Lead

Assembly

(Percussion

Volume

Cable

-

Red

Plug)

011-034753

Shielded

Cable & Cap assembly

(Vibrato

Switch

Cable)

011-036621

oiueiaea

Caole & cap Assembly

(Kevero

JSwitcn

t^Die

)

DPDOI ICCIOM PARI P AQCPMDI V /DPDI^I

ICQiniU

PADI

CV

fill AQAAAH

r^ADI C ACCmV/IDI V /I

rMA/dD

I\/1AIVIMAI Di ni 1

nOCt'7A€l

UABLb

AoohMbLY

(UrrcK MANUAL rLUij)

UII-U0D/0U

LUWtn

IVIAIMUAL

AootlVlbLY

1 iU-UUUU40

UPPER MANUAL

ASSEMBLY

1

19-000009

Switch

Cover

Assembly

060^33397

Top

Cover

Assembly

060-033405

Key Comb

Assembly

(12

Keys)

057-045053

Key Comb

Assembly

(8

Keys)

057-045052

Key &

Channel Assembly (Sharp

Key)

060-024286

Key &

Channel

Assembly (One

Set

of

Seven Ivory)

057-042770

Bracket

&

Channel Assembly

060-033392

Sems.

Bind

Head

Machine

Screw

850-000002

Sharp

Key

-

Blade

025-032672

Natural Key -Ivory

"C"

025-042279

Natural Key

-

Ivory "D"

025-042280

Natural Key

-

Ivory "E"

025-045053

Natural Key

-

Ivory "F"

025-042282

Natural

Key -Ivory

"G"

025-042283

Natural Key

-

Ivory "A"

025-042284

Natural Key

-

Ivory "B"

025-042285

Natural

Key

-

Ivory

"CX"

(Last Key

on

Manual)

025-042286

Mounting Bracket

Left

Hand

060-040192

Mounting

Bracket

Right

Hand

060-040193

Strain Relief

013-034999

Screw

(Key

Comb)

831-070314

Screw (Top

Cover)

925-050314

Screw (Switch

Top

Cover)

831-070414

GENERATOR

&

MOTOR

ASSEMBLY

Generator

&

Motor

Assembly

120V

60Hz

112-000021

Generator

&

Motor

Assembly

120V

50Hz

112-000022

Generator

&

Motor Assembly

220V

60Hz

112-000023

Generator

&

Motor Assembly

220V

50Hz

112-000024

Generator

Assembly

60Hz

113-000011

Generator

Assembly

50Hz

113-000012

Synchronous

Motor

120V

60Hz

021-033801

Synchronous

Motor

120V

50Hz

021-033802

Synchronous

Motor

220V

60Hz

021-033803

Synchronous

Motor

220V

50Hz

021-033804

Motor

Capacitor

120V 60Hz

499-033806

Motor

Capacitor

120V

60Hzor

120V

50Hz

499-033807

Motor

Capacitor 220V

60Hzor220V

50Hz

499-033805

Generator

Cover

Assembly

115-000031

Termmal

Panel Assembly (AC

Panel

with GY, BL.

YEL.)

006-024326

Motor Mounting

Bracket

035-027354

Capacitor Clamp

013-024313

Motor

Clamp

013-024427

Motor

Coupling

Spring

012^9132;

Motor

Coupler

017-024242

Insulator

Strip

(AC

Panel)

036-024328

Post

(For

Mounting

Cover)

044-031434

Terminal

Cover

041-022076

Oval

End

Cap

(Motor Capacitor)

041-024838

PEDAL

KEYBOARD &

SWITCH ASSEMBLY

116-000010

Pedal Keyboard

Frame

Assembly

Cover Assembly

Cable

Assembly

Actuator

Extension

Spring

Stop

Post

Up

Stop

Felt

Down Stop

Felt

Terminal Lug

Pivot

Bracket

Pivot

Bracket

(13

Used)

(13

Used)

(13

Used)

(26

Used)

(8

Used)

(5

Used)

Terminal

Panel Assembly

(Loi^)

Terminal Panel

Stationary

Contact

Assembly

(8

Used)

Contact

Spring

Assembly

(8

Used)

Actuator Spring

(8

Used)

Eyelet

(24

Used)

Terminal

Panel

Assembly

(Short)

Terminal Panel

For

Other

Components, Refer

to

Long Panel

Assembly.

Key

Channel

Assembly

(Long)

Key

Channel (Long)

Long

Key

(Brown)

Guide

Felt

Eyelet

Sems. Bind

Head

Machine Screw (Mounting Key)

Key

Channel

Assembly

(Short)

Key

Channel

(Short)

Short Key (Blade)

Guide

Feh

Eyelet

Sems.

Bind

Head

Machine

Screw

(Mounting

Key)

060-024270

046-025208

011-

024210

045-024198

012-

020404

044-

020398

042-020410

042-031898

007-015197

035-036094

035-036095
063-036553

045-

024196

030-033305

012-033541

012-024199

999-026552

063-036542

006-024197

057-035978

041-

020402

025-031666

042-

021255

999-017454
850-100514

057-035982

041-

020403

025-031469

042-

021255

999-017454

850-100714

PREAMPLIFIER

ASSEMBLY

117-000009

(AO-42)

Chassis

Pan

Assembly

Chassis

Housing

Assembly

Matching

Transformer

Assembly

T201

Plug

Assembly

3

Pin

Plug

Assembly

6

Pin

(Power)

Plug

Assembly

6

Pin

(Percussion

Switch)

Tube

12AU7

Tube

12AX7

Tube

Shield

Set

of

Capacitors

&

Resistors

(Chassis

Mounted)

Resistor

270K

R206

Resistor

IMeg

R214

Resistor

330K

R217

Potentiometer

30K

R225

Resistor &

Capacitor Panel

Assembly

Terminal

Board

Resistor
Resistor

Resistor

Resistor

Resistor
Resistor

Resistor
Resistor

Resistor

Resistor

Resistor

Resistor
Resistor
Resistor
Resistor

Resistor

Resistor

Resistor
Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Resistor

Capadtor

Capacitor

Capacitor
Capacitor

Capacitor

Capacitor

Capacitor
Capacitor

Capacitor

"nransistor

68K

20K

2.7K

3.9Meg

82J2

loon

IK

1.2K

3.3K

4.7

K

15K

47K

lOOK

150K
180K

220K

270K

270K

330K

470K
680K

IMeg

4.7Meg

5.6Meg

120K

.Imfd

.047

mfd

.33mfd

100

mfd

39

pf

.0047

mfd

.01

mfd

.02

mfd

.Imfd

R212,

R229

R211

R233

R235

R219
R209

R207

R234
R208

R231

R205

R210,R215,R216

R213

R202,R221,R232

R220,R223

R224

Selected

for

R226

Proper Gain

at

Inspection

R222

R218

R228, R230

R227

R201

R203

R236
200V

400V

lOOV

3V

500V

lOOV

lOOV

lOOV

lOV

Selected

at

Time

of

Inspection

€215

C204

C210

C201,C205,C207

€203

C211

C208,C209,C213,C214

C212

€206

Q201

009-024416

009-

024417

003-024469
011-036632

011-024376

011-036637

002-012300

002-012301

010-

041481

063-024412

600-021071

600-021211
600-021091

676-000144

063-024414

006-024407

600-040931

600-020391

626-060861

600-030591
600-021351

600-020231
600-020251
600-020331

600-020491

600-020511

600-020611

600-020651

600-020771

600-020891

600-020971
600-021011
600-021031

600-021051

600-021071

600-021070

600-021011

600-021131

600-021171

600-021211
600-021371

600-021391

600-020991

401-020533
403-030452

406-

010172

407-

010029

425-010151

413-010042

413-010072
425-010763
427-030025

001-021070

VIBRATO

AMPLIFIER ASSEMBLY

126-000023 (AO-47)

Chassis

Pan Assembly

Chassis

Housing

Assembly

009-036649
009-024417

Saturable

Reactor Assembly

Plug

Assembly 3

Pin

Plug Assembly

6

Pin

Capacitor 30mfd/350V,

40mfd/450V, 40mfd/400V C109,C110,C111

Potentiometer

500K R131

Tube 7247
Tube

12AU7

Tube Shield

Terminal Board Assembly

Resistor &

Capacitor)

Terminal

Board

Resistor
Resistor

Resistor
Resistor

Resistor
Resistor
Resistor
Resistor

Resistor
Resistor

Resistor

Resistor
Resistor

Resistor
Resistor
Resistor

Resistor
Resistor

Resistor
Resistor
Resistor

Resistor
Resistor

Resistor
Resistor

Resistor

Resistor

Resistor

Resistor
Resistor

Resistor

Resistor
Resistor

Resistor
Resistor

Resistor

Capacitor

Capacitor
Capacitor

Capacitor

Capacitor
Capacitor

Capacitor

Capacitor

Capacitor
Capacitor

5K

56K

lOK

470n

560^2

IK

1.2K

8.2K

15K

47K

180K

220K

330K

470K

IMeg

l.SMeg

1.2K

5%

150K

5%

12K
15K

18K

22K

27K

33K

1.2Meg

1

.5Meg

1 .SMeg

2.2Meg

2.7Meg

3.3Meg

3.9 Meg

270n

330^2

390n

470n

560J2

.047

mfd

.02

mfd

.02

mfd

.047 mfd

.10

mfd

.47 mfd

150

pf

.001 mfd

.0018 mfd

.01 mfd

R123

R136

R103,

R107,

R113, R1I4, R118, R109

R106,R112,R117

R133....Use

With

Red Dot

Reactors

R132

R121

R122

R104,R110, R115

R119

R102

RlOl

R135

R130, R125, R126, R127

R120, R139,

R105, Rill, R116

R108

R129

R128

One

Resistor

R137

Selected at

Factory

For Proper

Phase

Shift

One

Resistor

Selected

at

Factory

Rl

38

For

Proper

Vibrato

Rate

6.6-7.0

Hz.

One

Resistor

R133 Selected

at

Factory For

Proper

Width Control

lOOV

CI

18

lOOV

C114,C115

400V

CI 13

400V

C108

400V

CI

16

400V

C102,C104,C106

500V

C120,C121,C122

500V

ClOl

500V

C112

500V

C103,C105,C107,C119

063-025246

011-036630

011-024376
450-040200

676-000152

002-006307

002-012300

010-041481

063-027083

006-036647

603-060761

600-030911

600-030732

600-020411

600-020431

600-020491

600-020511

600-020711

600-020771

600-020891

600-021031
600-021051

600-021091

600-021131'

600-021211

600-021271

600-020512
600-021012

600-020751

600-020771

600-020791

600-020811

600-020831
600-020851
600-021231
600-021251

600-021271

600-021291

600-021311

600-021331

600-021351

600-020351
600-020371

600-020391

600-020411

600-020431

406-010112
406-010182

422-032012

422-032022

422-032032

422-032092

425-010292

425-010502

425-010562

425-010752

POWER

AMPLIFIER

ASSEMBLIES

Power

Amplifier

Assembly

120V

60Hz

fAO-43-n

126-000017

Power Amolifier Assemblv

120V 50Hz

fAO-43-2'i 1 16-00001

R

Power Amnlifier A^setViMv

Chassis Pan AsseniMv

Power Transformer Assemblv

1 20V 60Hz

X %J\J^

Power

Transfomier Assembly

120V

50Hz

X %J\J^

\I\3

0

\3 OyjD^O

Power Transformer Assemblv

234V 50-60HZ

J^%^~ T

%J\J \J\JXXJu

T-302

Oiitoiit Transformer Assemblv

T-301

Filter Choke Assemblv 1 4 Henerv

CH-301

AC Cord

&

Plug

Assembly

01

1-01^2^^

\J

X X

Kf %J J >J

*J

AC Strain Relief

01

3-0349

Oft

Plug

Assembly

3

Pin Female

rOutnut'k

\Mx

l.'^«7W^O

Plug

Assembly

9

Pill 01

1-014'^7Q

Plug

Assembly

3

Pill

Female

(Reverb)

01 1

-036633

Tube

12BH7

V7

009-01

930?

Tube

12AX7

V6,V8

009-019301

Tube

6BQ5

V9,V10

0024)06700

Tube

5U4

VI

2

001-00^101

\J\J

\J\J J) jJ\J

X

Set

of

Capacitors

&

Resistors

(Chassis

Mounted)

•

063-094401

\J\j

0

yjz^'-T'-r\j

X

Resistor 64^2

R338

604-070071

Resistor

4.7K

R335

600-0306^1

Resistor

8.2K

R341

600-030711

Resistor

39012

R310,R314

600-0103Q1

Resistor

IK

R311,R312

600-0104Q1

Resistor

3.9K R337

600-010631

Resistor

47K

R313,R323

600-010891

Resistor

470K

R301

600-091

1 31

Resistor

4.7Meg

R318

600-09

1 37

1

Resistor

220K

R344

600-0910^1

Resistor

300J2

R339

Resistor

75012

R340

609-0^0191

Resistor

IK

R343

609-0^01

41

Resistor

13012

R332

606-0^0099

Resistor

33K \

OUU-UZUOD

1

Resistor

39K 1

Factory Selected

60(1119nft71

Resistor

56K \

R309 For

Nominal Gain

600-09OQl 1

Resistor

82K /

600-09OQ^l

Resistor

120K 1

600-09

0QQ1

Resistor

270K

;

600-011071

Capacitor

lOOpf

500V

C307

41^-0109^9

Capacitor

.0022

mfd

500V

C315

41^-01

0^Ji3

Capacitor

.0012 mfd

500V

C304

425-01

OSll

Capacitor

.02

mfd

500V

C305 415-010763

Capacitor

.001 mfd

2000V

C314

425-030503

Capacitor

50

mfd

450V

C303

450-010070

Capacitor

50 mfd/450V

50mfd/450V

C316, C317, C318, C319

450-040401

Capacitor

.001 mfd

SOOV

C320

415-010501

Resistor

& Capacitor Ptoel

Assembly

063-01441

1

Resistor

15012

R321

600-010191

Resistor

IK R333, R334 600-020491

Resistor

2.7K

R302,

R327

600-010591

Resistor

6.8K

R322

600-010691

Resistor

lOK

R305,

R306

600-010731

Resistor

39K

R308

600-010^^7

1

Resistor

47K

R325

600-020891

Resistor

68K

R315

600-020931

Resistor

lOOK

R316,R317,R328,R329

1^

6Q(M)2Q971

Resistor

150K

R320

600-021011

Resistor

180K

R304

600-021031

Resistor

220K

R303,R319

600-021051

Resistor

330K

R307,R330,R331

600-021091

Resistor

470K

R324

600-021131

Resistor

IMeg

R326

600-021211

Capacitor

.047

mf

d

400V

C311,C312

403-030452

Capacitor

100

mfd

3V

C301,C308

407-010029

Capacitor

220

pf

500V C310

425-010332

Capacitor

.02

mfd

500V

C302, C309

425-010763

Capadtor

5

mfd

150V

C306

450-040083

Capacitor

100 mfd 25V

C313

450-040084

Potentiometer

lOK

R336

676-000143

PERCUSSION

PRESET ASSEMBLY

(L-IOOA)

121-000105

Printed

Circuit

Board

Chassis

Power Supply

Chassis

Speaker

Assembly

Marked

Endblock

Knob

Large

(Percussion

Endblock)

Knob

Small

(Percusaon

Endblock)

RHYTHM

PRINTED

WIRING

BOARD

ASSEMBLY

124-000114

Used

With

6-Button Rhythm

Endblock

Printed

Wiring Board

Resistor 470J2

R138

Resistor

820£2

R103,R103A,R103B,R103C

Resistor

2200^

R141,R160

Resistor

5600n

R130

Resistor

lOK R108,

R108A,

R108B,

R125, R131, R157,

R161, R164

Resistor

12K R148

Resistor 15K R106A

Resistor 15K

R119,R122

Resistor 18K

R107B

Resistor 22K R106,

R106B, R106C,

R107C

Resistor

22K

R140,R128,R150,R151,R154,R159

Resistor

27K

RIH,

R127,

R142

Resistor

33K Rn8,R145

Resistor

39K R107A

Resistor

47K

R100,R100A,R100B,R100C,R137,R136,R139

Resistor 68K R102,

R102A,

R102B, R102C, R165

Resistor lOOK

RlOl,

RIOIA, R101B,R101C,R110,R117,R152,R153,

R155,R156

Resistor 150K

R121,R163

Resistor 220K R123,

R147,R149,R158,R160

Resistor

150^

R167

Resistor 470K

R105,R105A,R105B,R105C,R111,R115,R120,R162

Resistor 680K R124
Resistor

IMeg R112

Resistor

2.2Meg

R104,

R104A,

R109, R109A, R109B,

R109C

Resistor

2.7Meg R129

Resistor 6.8Meg

R104B,R168

Resistor

lOMeg R104C

Resistor

1.5Meg

RI16

Resistor 27K

R107

Potentiometer

Trimmer

5K R134

Potentiometer Trimmer

50K R113,R126

Potentiometer Trimmer 20K R169

121-000102
121-000103

121-000104
025-031201
031-033591

031-033594

023-041242

600-020411

600-020471

600-020571

600-020671

600-020731

600-020751

600-020772

600-020771

600-020791

600-020812

600-020811

600-020831

600-020851

600-020872

600-020891

600-020932

600-020971

600-021011

600-021051
600-020291
600-021131

600-021171
600-021211

600-021291

600-021311

600-021411
600-021451

600-021251

600-020832

676-000011

676-000019
676-000015

Capacitor

.001

mfd

C110,C117,C118,C119

405-340012

Capacitor

.0015

mfd C102C,

C103C,

C104C

405-340022

Capacitor

.0022

mfd C121,C125

405-340032

Capacitor

.0039

mfd

CI

15

405-340052

Capacitor

.0047

mfd

C102B,

C103B,

C104B, C128

405-340062

Capacitor .0082

mfd C109

405-340072

Capacitor

.01

mfd

C108,C111,C112,C116,C130

405-340082

Capadtor

.015

mfd C102A,

C103A,C104A

405-340092

Capacitor

.022

mfd C101B,C102,C103,C104

405-340112

Capacitor

.047

mfd C101,C101A,C127

405-340142

Capacitor

.1

mfd

ClOO,

ClOOA, ClOOB,

ClOOC,

C108, C107,

CI

14,

C123,

C124,C126

405-340182

Capacitor

.22

mfd

C113

405-340212

Capacitor .056

mfd

ClOlC

405-340162

Capacitor

47pf

C105B

426-010172

Capacitor

68pf

C105C

426-010212

Capacitor

220pf

C105,C105A

4264)10332

Capacitor

Tantalum

Imfd

C120

414-040092

Capacitor

Tantalum

lOmfd CI 22

414-040152

Capacitor

Electrolytic

lOOOmfd

C129

407-060149

Transistor

Q106,Q107,Q108

001-021070

Transistor

QlOO,

QIOOA,

QIOOB, QIOOC,

Q103, Q104,

Q112, Q114, Q115,

Q116

001-021134

Transistor

Q102,Q105,Q109,

QUO

001-021135

Transistor

Q111,Q113

001-021172

Transistor

(Noise) QlOl

001-021211

Diode

DlOO,

DIOOA,

DIOOB,

DIOOC,

DlOl

,

D102,

D103, D104

001-026010

Choke

L100,L101

003-030753

LOWER

RIGHT HAND

ENDBLOCK

ASSEMBLY

125-000043

(Rliytlun

Six-Button

T-200-1-2, T-400)

^dblock

Lower Right Hand

025-041129

Cushion

'

043-041131

Push

Button

025-033453

Compression Spring

012-033464

Knob

031-031755

Cable

Assembly

011-041161

Cable CUp

013-025297

Potentiometer

(Duel

Construction)

676-000269

Resistor

2200r2

600-010571

Resistor

lOK

600-010731

Resistor

56K

600-020911

Diode

001-026010

Switch

Panel

Assembly

008-041158

Switch

Panel

006-041135

Contact Spring

Assembly

008-021944

Stationary Contact Assembly

030-021927

Riveting

Plate

041-020664

Contact Spring

030-041132

Pivot ^dket

041-041133

Felt Stop

042-041130

Stop

Post

030-033690

Spring

012-032408

Shaft

020-037239

SfHingBrid^

041-041134

Support

(Shaft)

041-041157

Rocker Tab Block

Pedal

031-041143

Rocker Tab

Cymbal

Pedal

031-041144

Rodcer Tab

Brush Lower

031-041145

Rocker Tab Bongo Lower

031-041146

Rocker

Tab

Tom

Tom

Lower

031-041147

Rocker Tab

Oaves

Lower 031-041148

Felt

Washer

042-032415

Retaining Ring

(For Shaft)

0

1

3-04

1

1 63

Terminal Lug

007-022974

POWER SUPPLY

ASSEMBLY 120V 60Hz

127-000007

POWER SUPPLY

ASSEMBLY

120V

50Hz

127-000008

POWER

SUPPLY

ASSEMBLY

220V

50-60Hz

127-00009

Power Supply Chassis

041-033^(^1

Terminal Strip Assembly

WW^JAO^

J.

•J

Transformer

120V

60Hz

Transformer

120-220V

50-60HZ

001-011474

Capacitor

Electrolytic

SOOmfd

407-090129

Capacitor Electrolytic

80mfd/40mfd/20mfd

ClOO

Printed

Wiring Board Assembly 124-000022

Printed

Wiring Board

&

Pin

Assembly 023-033482

Diode

D100,D101,D102,D103

001-024051

Transistor

QlOO, QlOl

001-021133

Transistor

Q102

001-021111

Zener Diode

30V

D104

001-023040

Resistor

150J2 R103

600-020291

Resistor

220^2

RlOl

600-020331

Resistor 330^2 R102

600-020371

Resistor

2.2K R104

600-020571

Resistor

6.8K R105

600-020692

Resistor 27K R106

600-020832

Resistor

33K R108

600-020852

Capacitor Ceramic .02mfd

C102 426-010763

Spacer

(4

Used) 044-033662

Cable Assembly

011-040032

PEDAL

CONTROL

BOARD ASSEMBLY {ENDBLOCK RHYTHM)

Pedal

Control Board Assembly

063-042051

Terminal

Board

Assembly

006-041578

Capacitor

1

mfd

CI

414-040092

Capacitor

.1

mfd

C2,

C3,

C4

414-040012

Capacitor

390

pf

C5 425-010392

Capacitor

82

pf

C6 425-010232

Capacitor 470 pf

C7

425-010412

Resistor

looon

Rl

600-020491

Resistor 2200n R16

600-020571

Resistor

lOK R5,

RIO 600-020731

Resistor

15K

R12,R15

600-020771

Resistor

22K

Rll

600-020811

Resistor

lOOK

R3,R4,R7

600-020971

Resistor 150K

R6

600-021011

Re^or 470K

R7

600-021131

Redstor IMeg

R13,R14

600-021211

Resistor 2.2Meg

R8

600-021291

Resistor

3.9Meg

R2

600-021351

Transistor

Q2,Q4

001-021133

Transistor

Q1,Q3

001-021135

IKode Dl

001-026030

AUTOMATIC

RHYTHM ASSEMBLY

(RHYTHM

II

DRAWER)

Automatic

Rhythm Assembly

120V

Power Supply

Assembly

Automatic Rhythm Assembly 120V

Power Supply

Assembly

Automatic Rhythm Assembly

220V

Power

Supply

Assembly

Automatic

Rhythm

Assembly 220V

Power

Supply Assembly

Shield

(Power

Supply)

Control Assembly

Voice Generator Assembly

Shield (Voice

Generator Assembly)

}Nite

&

Plug

Assembly

Screw

#6

(4

Power

Supidy-4

Voice Generator)

Screw

(Mounting

Rail)

Adhesive Backed

Felt

dip

(Adli^ve Backed)

60Hz

50Hz

tiOHz

50Hz

WOODWORK

LI

11-1

Cabinet Assembly

Case

Assembly

Top

Panel

Music Panel

Baffel

& GriUe

Ooth

Rear Cover

Bench Assembly

Cabinet Assembly LI

12-1

Case Assembly

Top

Panel

Music

Panel

Baffel & Grille Goth

Rear Cover

Bench Assembly

Cabinet Assembly

LI

22-1

Case Assembly

Top

Panel

Music

Panel

Baffel

&

Grille Cloth

Rear Cover

Bench Assembly

Cabinet Assembly LI

33-1

Case Assembly

Top

Panel

Music

Panel

Baffel &Grineaoth

Rear Cover

Bench Assembly

Cabinet

Assembly

L143-1

Case Assembly

Top Panel

Music

Panel

Baffel

&

GriUe

Cloth

Rear Cover

Bench Assembly

Cabinet Assembly L212-1

110-000047

127-000028
110-000049

127-000029
110-000050
127-000030

110-000051

127-000030

0104)42054

125-000045

063-042080

010-

042082

011-

042083

884-050734

884-050933

042-035141

999-000065

013-042242

111-000024

050-036894

050-036890

050-038294

052-036886

056-040229

152-000023
111-000025

050-036895

050-036891

050-038295

052-036887

056-040228

152-000024

111-000026

050-025470

050-036891

050-025427
052-036887

056-040228

152-000027

111-000027

050-025500

050-036893

050-025428

052-036888

056-040228

152-000025
111-000028

050-025530

050-036892

050-036905
052-036889

056-040230

152-000026
111-000115

r

Case

Assembly

Top

Piinel

^

Music

Panel

Baffel

& GriUe

Cloth

Rear

Cover

Bench

Assembly

Cabmet

Assembly L222-1

Case

Assembly

Top

Panel

Music

Panel

Baffel

&

Grille Cloth

Rear Cover

Bench

Assembly

MISCELLANEOUS

i^dal FUter

Choke

Assembly

Cable

Assembly

(Generator

To

Manuals)

Reverberation

Unit

Assembly

Trim

Strip

(Grille

Cloth)

Speed

Nut

Cover

(Control Switch)

Felt

(Adhesive

Backed)

Endblock

Upper Right

Hand

-

Textured

Endblock

Upper Right

Hand-Smooth

Endblock

Lower

Left Hand

-

Textured

Endblock

Lower

Left Hand

-

Smooth

Endblock

Lower

Right

Hand

-

Textured

Endblock

Lower

Rij^t

Hand

-

Smooth

050-036895

0S0-000S40

050-038295

052-036887

056-040228

152-000024

111-000116

050-025470

050-000840

050-025427
052-036887

056-040228

152-000027

003-025333

011-024352

121-000002

061-031029

999-024841

041-

024211

042-

033312

025-035707

025-024307

025-028406

025-024848

025-028407

025-024847

SPEAKERS

L100,L100.1,-2

LIOOA

L100,L100-l,-2

LIOOA

(Early

Production)

(Early

Production)

014-024346

014-027293

014-024346

014-024347

014-030812
014-027293

014-030812

Ir200

PARTS

UST

INDEX

CONTROL

PANEL

ASSEMBLY

6-16

Stop

Switch

Base

6-16

Manual Stop Switch AssemUy

6—16

Preset

Switch

Assembly

(lower

manual)

6-16

Preset Switch Assembly (upper

manual)

6—16

Percussion

Switch

Assembly

6—17

Vibrato

Switch Assembly

6—17

Reverberation, Volume,

Brilliance Switch

Assembly

6—17

LOWER

MANUAL ASSEMBLY

6-18

UPPER

MANUAL

ASSEMBLY

6-18

Playing

Keys

6—18

GENERATOR

AND MOTOR

ASSEMBLY

6-19

PEDAL

KEYBOARD

AND

SWITCH

ASSEMBLY

6-19

Terminal

Panel Assembly

(long)

6—19

Terminal

Panel Assembly

(short)

6—19

PREAMPLIFIER

ASSEMBLY

117-000009

6-20

VIBRATO

AMPLIFIER

126-000023

6-20

POWER

AMPLIFIER

ASSEMBLIES

6-22

Power

Transformer 120 V

60

Hz

6-22

Power

Transformer

120

V

50

Hz

. ,

6-22

Power Transformer

234 V

50-60 Hz

6-22

SWELL PEDAL

ASSEMBLY

123-000021

6-23

RHYTHM II AND

EXTRUSION

ASSEMBLY

125-000050

6-23

POWER

SUPPLY

ASSEMBLY

126-000041

,

,

6-23

Transformer

Assembly

120 V 60

Hz

6—23

Transformer

Assembly

120/220

V

50/60

Hz

6-23

MISCELLANEOUS

Generator

Pad

6-24

Reverberation

Unit

Assembly

6—24

Power

Supply Cable

6-24

Speakers

6—24

Swell Pedal Housing

6-24

EndBlodcs

6-24

Front

Strip

6-24

Pedal

Filter Choke Assembly

6-24

CONTROL

PANEL

ASSEMBLY

120-OOOOtl

Panel Assembly

Stop

Switch

Base

Screw (Stop Switch Base

Mounting)

"S"

Clip (For Control

Panel

Switch

Cover)

Line

Switch

Lampholder

Assembly

Lamp

6.3V

Pilot

Light Lens

Push

on

Clip (For

Lens)

Felt

Washer

Aluminum Foil Tape

Shim

(For Line

Switch)

Screw (Control

Panel Mounting

-

10 Used)

Washer

(Used on

Control

Panel

Screws

-

10 Used)

Manual

Stop Switch Assembly

Mounting

Block

Assembly

Contact Spring

Assembly

Stop

Slide

Stop Channel

Drawbar

Stop

#4-24x3/8

Round Head

Screw (Drawbar Knob Mounting)

Stamped

Stop Knob

16'

Stamped

Stop

Knob

8'

5-1/3'

4'

2-2/3'

2'

1-3/5'

1-1/3'

r

Stamped

Stop Knob

Stamped

Stop Knob

Stamped

Stop Knob

Stamped Stop Knob
Stamped Stop Knob

Stamped

Stop Knob

Stamped Stop

Knob

Clamp Spring

Terminal

Lug

Twisted

Pair

&

Cap

Assembly (Console

Output

to Preamplifier)

#2-56

Tap

Tite

Screw

061-027350

041-

025778

823-041714

013-024298

068-034791

016-034440

016-022885

016-031454

013-031468

042-

020820

039-031450

033-043006

845-070318

999-000061

120-000041

063-025776

012-027488

028-032049
025-027829

025-040198
901-030514

031-034331

031-034333

031-034337

031-034338
031-034339

031-034340

031-034341

031-034342

031-034343

012-027613

007

022320

011-036624
939-010434

PRESET

SWITCH

ASSEMBLY

(LOWER

MANUAL)

008-034391

Switch

Panel

& Bracket

Assembly

Cancel

Lever

Assembly

Mounting Bracket

Lever Mounting Bracket

Control

Tab (Drawbars)

Control

Tab

(Ensemble)

Plastic Tie

Tubular

Clip

Shaft

Sprii^ Washer

Sems.

Round

Head

Machine Screw

Flat Head Machine

Screw

008-024614
060-037187

035-024205

035-024335

031 036481

031-036482

013-031744

013-028002
020-037240

999-000151

821-040314
839-040214

PRESET SWITCH ASSEMBLY (UPPER

MANUAL)

008-024392

Switch Panel

&

Bracket Assembly (Drawbars, Trumpet,

Clarinet)

Switch

Panel

& Bracket Assembly

(Full

Organ)

Cancel Linki^e

Assembly

008-024613

008-024626

060-037190

Mounting Bracket

035-024205

Lever

Mounting

Bracket

035-024335

Control Tab. (Drawbars)

031

036481

Control Tab.

(Trumpet)

031-036483

Control

Tab. (Clarinet)

031-036484

Control Tab.

(Full

Org^n)

.

031-036485

Tubular Clip

013-028002

Shaft

020-037238

Spring Washer

999-000151

Terminal Lug

007-035151

Sems. Round Head Machine

Screw

821-040314

DCDPIIQQinM CUVITPIJ AQQFMRI V nOfl MAWl

rCnUUoolUIV

aWI 1 un

MOOCIVIDL Y UUo-U^HJ«fil

SWITCH

PANEL

&

BRACKET ASSEMBLY

/QPpnMn u

A

Di\/inivi

IP TkiiDn UAQiv/iniviiP^ nnn

n7ZLRifi

\OCLUIMU

nMnlVIUlM

lb,

inlnU

nMnlVIUiMIU/ UUo-U^4DI3

SWITCH

PANEL

&

BRACKET ASSEMBLY

(FAST

DECAY,

PERCUSSION SOFT)

008-024617

Mounting

Bracket

035-024205

Lever Mounting

Bracket

035-024335

Control Tab

(Second

Harmonic)

031-036486

Control

Tab (Third Harmonic)

031-036487

Control

Tab

(Fast Decay)

031-036488

Control

Tab

(Percussion

Soft)

031-036489

Spring

Washer

999-000151

Tubular Qip

013-028002

Shaft

020-037238

Terminal Lug

007-024137

Flat

Head

Machine

Screw

839-040214

Sems. Round Head

Machine

Screw

821-040314

Resistor

2.2

Meg

R409

600-021291

/rnn

n^i c£i

vIOnA

1 U

oVVI

1

Ln

AooCIVIdL Y

UUo-U^4o94

CWITrU DAIUCI SL RDAPIfCT ACCPMni V /WIRDATfl CMIAI 1 \ MM n9AR1f>

OWI

1

bn rAracL

a

DnAlflVC

1

AoocMdLT

iVIttriAltJ

olVIALL/ UUo-U£40ID

SWITCH

PANEL

&

BRACKET

ASSEMBLY

(VIBRATO

NORMAL,

VIBRATO

CHORUS)

008-024617

Mounting

Bracket

035-024205

Lever Mounting

Bracket

035-024335

Control

Tab.

(Vibrato

Normal)

031-036490

Control Tab. (Vibrato Small)

031-036491

Control Tab.

(Vibrato

Chorus)

031-036492

Plastic

Tie

013-031744

Terminal

Lug

007-024137

Shaft

020-037238

Tubular Clip

013-028002

Spring

Washer

999-000151

Flat Head Machine

Screw

839-040214

Resistor 2.2Meg

R403

600-021291

Resistor 3.9Meg

R404

600-021351

Resistor 6.8Meg

R402

600-021411

REVERBERATION,

VOLUME, BRILLIANCE

SWITCH

ASSEMBLY 008-025549

Switchi

Panel

&

Bracket

AssemUy

(Reverb

II

Volume

Soft)

008-024617

Switch

Panel

&

Bracket

Assembly

(Reverb

I)

008-024604

Switch

Panel

& Bracket

Assembly

(Brilliance)

008-024610

Mounting

Bracket

035-024351

Lever

Mounting

Bracket

035-024335

Control

Tab.

(REVERB

I)

031-036493

Control

Tab.

(REVERB

II)

031-036494

Control

Tab.

(VOLUME

SOFT)

031-036495

Control

Tab.

(BRILLIANCE)

031-036496

Hastic

Tie

013-031744

Shaft

020-037239

Spring

Washer

999-000151

Tubular

Clip

013-028002

Tie

Strap

041-027176

Flat Head

Machine

Screw

839-040314

Sems.

Round

Head

Machine

Screw

821-040314

Resistor

lOOK

R407

600^020971

Resistor

270K

R406

600-021071

Resistor

820K

R405

600-021191

Resistor

4.7Meg.

R408

600-021371

Capacitor

Ceramic

.OOISju/

C402

425-010542

Capacitor

.022m/

C401

401-020342

Shielded

Lead

Assembly

(Vibrato

Chorus

Cable

-

Blue

Hug)

011-034752

Shielded

Lead

Assembly

(Percussion

Volume

Cable

-

Red

Hug)

001-034753

Shielded

Cable

& Cap

assembly

(Vibrato

Switch

Cable)

011-036621

Shielded

Cable & Cap

Assembly

(Reverb

Switch

Cable)

011-036622

PERCUSSION

CABLE

ASSEMBLY

(PERCUSSION

CABLE)

011-036640

CABLE

ASSEMBLY (LOWER

MANUAL

PLUG)

011-036749

CABLE

ASSEMBLY

(UPPER

MANUAL

PLUG)

011-036750

LOWER

MANUAL

ASSEMBLY

119-000045

UPPER MANUAL

ASSEMBLY

119-000009

Switch

Cover

Assembly

Top

Cover

Assembly

Key

Comb

Assembly

(12

Keys)

Key

Comb

Assembly

(8

Keys)

Key

&

Channel

Assembly

(Sharp

Key)

Key

&

Channel

Assembly

(One Set

of

Seven

Ivory)

Bracket

&

Channel

Assembly

Sems.

Bind

Head Machine

Screw

Sharp

Key

-

Black

Natural Key

-

Ivory

"C"

Natural

Key

-

Ivory

"D"

Natural

Key

-

Ivory

"E"

Natural

Key

-

Ivory

'T"

Natural

Key

-

Ivory

"G"

Natural

Key

-Ivory

"A"

Natural Key

-

Ivory

"B"

Natural

Key

-

Ivory

"CX" (Last

Key on

Manual)

Mounting

Bracket

Left

Hand

Mounting

Bracket

Right Hand

Strain

Relief

Screw

(Key

Comb)

Screw

(Top

Cover)

Screw

(Switch Top

Cover)

060-033397

060-033405

057-045053

057-045052

060-024286

057-042770

060-033392

850-000002

025-032672

025-042279
025-042280

025-042281

025-042282

025-042283
025-042284

025-042285

025-042286

060-040192

060-040193
013-034999

831-070314

925-050314

831-070414

GENERATOR

&

MOTOR

ASSEMBLY

ijreneraior

ol

ivjoior /\ssciTiDiy

1 ?nv

1 L\j

V

\j\3V\L

1

12-000021

vjciicraior

ol

ivioior

AssemDiy

1 9nv

1

1

2-000022

vjcucraioi OL

ivioioi /\sseinDiy

ouxu

1 1

2-000023

viciieiaior oc

ivioior AssemDiy

ji\3xxL

1 1

2-000024

Lieneraior

AssemDiy

oujnuL

1 nooooi 1

vjcnciaiOi

Asscmoiy

1 n.000012

ayncnronous

ivioior IZU Y

021-03:^801

ay

iiciiroiicius

Moior

izuv

021-033802

oyncnronous

ivioior

V

oyncnronous

ivioior

LL\J V

021-033804

ivioior capaCiior

1 L\3 Y

499-033806

jTiuior

\^pav/iiur

110

V

499-033807

Motor

Capacitor 220V

60Hzor220V

50Hz

499-03380S

Generator

Cover Assembly

1 1

5-000003

Terminal

Panel Assembly (AC

Panel with

GY, BL.

YEL.)

006-024326

Motor

Mountiiig Bracket

035-027354

Capacitor Qamp

013-0^4313

Motor

Clamp

013-024427

Motor Coupling

Spring

012-029132

Motor Coupler

017-024242

Insulator

Strip (AC

Panel)

n^A

n">4378

Post

(For Mounting

Cover)

044-031434

Terminal Cover

041-022076

Oval

End Cap

(Motor

Capacitor)

041-024838

PEDAL

KEYBOARD

&

SWITCH

ASSEMBLY

116 000010

Pedal Keyboard

Frame Assembly

Cover

Assembly

Cable

Assembly

Actuator

Extension

Spring

Stop

Post

Up

Stop

Felt

Down

Stop Felt

Terminal

Lug

Pivot Bracket
Pivot Bracket

(13

Used)

(13

Used)

(13

Used)

(26

Used)

(8

Used)

(5

Used)

Terminal

Pand Assembly

(Long)

Terminal Panel

Stationary Contact Assembly

(8

Used)

Contact

Spring

Assembly

(8

Used)

Actuator Spring

(8

Used)

Eyelet

(24

Used)

Terminal

Panel

Assembly (Short)

Terminal

Panel

For

Other

Components, Refer to Long

Pand Assembly.

Key

Channel

Assembly

(Long)

Key

Channel (Long)

Long

Key (Brown)

Guide

Felt

Eyelet

Sems.

Bind

Head Machine Screw

(Mounting

Key)

Key

Channel Assembly (Short)

Key

Channel

(Short)

Short Key

(Black)

Guide

Felt

Eyelet

Sems.

Bind Head

Machine

Screw

(Mounting

Key)

060-024270
046-025208

011-

024210

045-024198

012-

020404

044-

020398

042-020410

042-031898

007-015197

035-036094

035-036095

063-036553

045-

024196

030-033305

012-033541

012-024199
999-026552

063-036554

006-024197

057-035978

041-

020402

025-031666

042-

021255

999-017454

850-100514

057-035982

041-

020403

025-031469

042-

021255

999-017454

850-100714

PREAMPLIFIER

ASSEMBLY

117-000009

(AO-42)

Chassis

Pan Assembly

009-024416

Chassis

Housing

Assembly

009-024417

Matching

Transformer

Assembly T201

003>024469

r

lug

AsseniDiy

3Pin

011-036632

Plug

Assembly

6

Pin

(Power)

011-024376

Plug Assembly

6

Pin

(percussion

Switch)

011-036637

Tube

12AU7

002-012300

Tube

12AX7

002-012301

Tube

Shield

010-041481

Set

of

Capacitors &

Resistors

(Chassis Mounted)

063-024412

Resistor

270K R206

600-021071

Resistor

IMeg

R214

600-021211

Resistor

330K

R217

600-021091

Potentiometer

30K

R225

676-000144

Resistor

&

Capacitor Panel

Assembly

063-024414

Terminal Board

006-024407

ResistdiT

68K

R212,R229

600-040931

Resistor 390^2

R211

600-020391

20K R233

626-060861

2 7K

R235

600-030591

QM

eo

R219

600-021351

IxcSIaIUi

R109

600-020231

Resistor

100^2

R207

600-020251

220n

R234

600-020331

Resistor

ilv

R208

600-020491

fveSlSlOr

600-020511

R205

600-020611

R p«i«fnr

4 7K

R210R215R216

600-020651

R pcictni*

15K

R213

600-020771

RAciclrki*

47K

R202 R221 R232

600-020891

R

pcfcfor

lOOK

R220,R223

600-020971

Resistor

150K

R224

600-021011

RPQWtOI*

XVwolSivrl

180K

Selected

for

600-021031

'

RpciQtriir

220K

R226 Prooer Gain

600-021051

270K

at

Inspection

600-021071

Resistor 270K

R222

600-021070

Resistor

330K

R218

600-021091

Resistor

470K

R228,

R230

600-021131

Resistor

680K

R227

600-021171

Resistor

Resistor

IMeg

4.7Meg R2ol

^!*"^*^**

Tune

of

R236

I»«P^^««"

600-021211

600-021371

Resistor

5.6Meg

600-021391

Resistor

120K

600-020991

Capacitor

.1

mfd

200V C215

401-020533

Capacitor

.047

mfd

400V C204

403-030452

Capacitor

.33

mfd

lOOV C210

406-010172

Capacitor

iOOmfd

3V

C201,C205,C207

407-010029

Capacitor

39

pf SOOV

C203

425-010151

Capacitor

.0047

mfd

lOOV

C211

413-010042

Capacitor

.01

mfd

lOOV

C208,C209,C213,C214

413-010072

Capacitor

.02

mfd

lOOV

C212

425-010763

Capacitor

.Imfd lOV

C206

427-030025

Tiamistor

Q201

001-021070

VIBRATO

AMPLIFIER

ASSEMBLY

126-000023 {AO-47)

Chassis

Pan

Assembly

Chas^

Housing

Assembly

009-036649

009-024417

Saturable Reactor

Assembly

Plug Assembly 3

Pin

Plug

Assembly

6

Pin

Capacitor

30mfd/350V,

40mfd/450V,

40mfd/400V

C109,

C110,C111

Potentiometer 500K

R131

Tube

7247

Tube 12AU7

Tube

Shield

Terminal

Board Assembly

(Resistor

&

Capacitor)

Terminal Board

Resistor

5K

R123

Resistor

56K

R136

Resistor

lOK

R103, R107, R113,

R114, R118,

R109

Resistor

470n

R106,R112,R117

Resistor

560^

R133....Use

With

Red

Dot Reactors

Resistor

IK R132

Resistor

1.2K

R121

Resistor

8.2K

R122

Resistor

15K

R104,R110,R11S

Resistor

47K

R119

Resistor

180K

R102

Resistor

220K

RlOl

Resistor

330K

R135

Resistor

470K

R130,R125,R126,R127

Resistor

IMeg R120, R139,

R105,

Rl 1

1

,

Rl

16

Resistor

l.SMeg

R108

Resistor

1.2K

5%

R129

Resistor

150K

5%

R128

Resistor

12K \

Resistor

15K 1

One

Resistor

Resistor

18K

V

R137

Selected at

Factory

Resistor

22K f

For

Proper

Phase

Resistor

27K 1

Shift

Resistor

33K

;

Resistor

1.2Meg.

Resistor

l.SMeg

]

One

Resistor

Resistor

l.SMeg

f

Selected

at

Factory

Resistor

2.2Meg

>

R138

For

Proper Vibrato

Resistor

2.7Meg

(

Rate

6.6-7.0 Hz.

Resistor

3.3Meg

]

Resistor

3.9Meg

^

Resistor

270n

)

Resistor

One

Resistor

Resistor

R133

Selected

at

Resistor

47012

i

Factory

For

Proper

Resistor

56on

;

Width

Control

Capacitor

.047

mfd

lOOV

C118

Capacitor

.02

mfd

lOOV

C114,C115

Capacitor

.02

mfd

400V

C113

Capacitor

.047

mfd

400V

C108

Capacitor

.10

mfd

400V C116

Capacitor

.47

mfd

400V C102,C104,C106

Capacitor

150

pf

500V C120,C121,C122

Capacitor

.001

mfd

500V

ClOl

Capacitor

.0018

mfd

500V

C112

Capacitor

.01

mfd

500V

C103,C105,C107,C119

063-025246

011-036630

011-024376

450-040200

676-000152
002-006307
002-012300

010-041481

063-027083

006-036647

603-060761

600-030911

600-030732

600-020411

600-020431
600-020491

600-020511

600-020711

600-020771

600-020891

600-021031

600-021051

600-021091
600-021131

600-021211

600-021271

600-020512

600-021012

600-020751
600-020771

600-020791

600-020811

600-020831

600-020851

60(M)21231

600-021251
600-021271

600-021291
600-021311

600-021331

600-021351

600-020351

600-020371

600-020391

600-020411

600-020431

406-010112

406-010182

422-032012
422-032022

422-032032

422-032092

425-010292
425-010502

425-010562

425-010752

POWER AMPLIFIER ASSEMBLIES

Power

Amplifier

Assembly

120V

60Hz

(AO-43-1)

126-000017

Power Amplifier Assembly 120V 50Hz

(AO-43-2)

126-000018

Power Amplifier Assembly 234V

50-60HZ

(AO-43-3)

126-000019

Chassis

Pim Assembly

009-l>244t0

Power

Transformer

Assembly

120V

60Hz

T-302

003-024157

Power

Transformer

Assembly 120V 50Hz

T-302

003-036548

Power

Transformer Assembly 234V

50-60-Hz

T-302

003-036549

'

Output

Transfonner

Assembly

T-301

003-036550

Filter Choke

Assembly

14

Heneiy

CH-301

003-024159

AC

Cord

&

Plug

Assembly

011-033233

AC

Strain Relief

013-034998

Plug

Assembly

3

Pin

Female

(Output)

011-036628

Plug

Assembly

9

Pin

011-024379

Plug

Assembly

3

Pin

Female

(Reverb)

011-036633

Tube

12BH7

V7 002-012302

Tube 12AX7 V6, V8 002-012301

Tube

6BQS V9, VIO

0024)06700

Tube

5U4

V12

002-005201

Set

of

Capacitors

&

Resistors (Chassis

Mounted)

063-024401

R338 604-070071

R33S

6004)30651

R341 600-030711

IVCalSlUl R310,

R314

600-020391

1 A.

R311,R312

600-020491

3.9K R337 600-020631

ivcsisior

47K R313,R323

600-020891

Resistor 470K R301 600-021131

Resistor

4.7Meg R318 600-021371

Resistor

220K

R344

600-021051

Resistor

3mi

R339 602-050081

Resistor 750n R340 602-050121

Resistor

IK R343

602-050141

•

Resistor

R332 606-050022

Resistor

33K \

600-020851

Resistor

39K 1 Factory

Selected

600-020871

Resistor

56K (

R309 For Nominal

Gain

600-020911

Resistor

82K / 600-020951

Resistor

120K 1

600-020991

Resistor

270K

)

600-021071

Capacitor

lOOpf

500V

C307 425-010252

Capacitor

.0022

mfd

500V

C315

425-010583

Capacitor

.0012mfd

500V

C304 425-010522

Capacitor

.02

mfd

SOOV C305 425-010763

Capacitor

.001 mfd 2000V C314 425-030503

Capacitor

50

mfd

450V C303 450-010070

Capacitor

50

mfd/450V

50

mfd/450V

C316,C317,C318,C319

450-040401

Capacitor

.001

mfd SOOV

C320 425-010502

Resistor

&

Capacitor Panel

Assembly

063-024411

Resistor

150n R321 600-020291

Resistor

IK

R333,R334 600-020491

Resistor

2.7K

R302, R327

600-020591

Resistor

6.8K

R322

600-020691

Resistor

lOK R305,R306 600-020731

Resistor

39K R308

600-020871

Resistor

47K R325

600-020891

Resistor

68K R315 600-020931

Resistor

lOOK R316,R317,R328,R329

,600-020971

Resistor

150K R320

600-021011

Resistor

180K

R304

600-021031

Resistor

220K

R303,

319

600-021051

Resistor 330K R307,

330,

331

600-021091

Resistor

470K

R324 600-021131

Resistor

IMeg

R326

600-021211

Capacitor

.047

mfd 400V C311,312

403-030452

Capacitor

100

mfd 3V

C3G

1,308

407-010029

Capacitor

220

pf

500V C310

425-010332

Capacitor

.02

mfd

500V

C302,309

425-010763

Capacitor

5

mfd 150V C306

450-040083

Capacitor

100 mfd

25V

C313

450-040084

Potentiometer

lOK

R336

676-000143

SWELL PEDAL

ASSEMBLY

123-000021

Base

Braclcet

Assembly

Shutter

Assembly

Bearing

Bradeet

Bearing

Bracket

with Dowel

Pedal

Bearing

(slotted)

Pedal Shaft

Machine

Screw

Lodk Washer

iqiutfe

Nut

Cell &

Housii^

Wiring Assembly

Diffuser

Photo Cell Housing Cover

Light Bulb

Socket Assy.

Sprmg

Light

Bidb

Pedal Assembly (with mat)

060-030207
060-033749

0354J31429

035-031428

017-031431

020-021725

843-081113

999-000729

999-001343
040-030216

016-030153

025-032880

034-033419

012-030154
016-031748

0604)33289

RHYTHM II

&

EXTRUSION ASSEMBLY

125-000050

Rhythm

II

Unit

(inbuilt Automatic)

Screened

Panel

(painted

Part)

R. H. End

Cap

L.H.EndCap

125-000049

061-042579

045-042507

045-042508

POWER SUPPLY ASSEMBLY 120V

60

Hz.

127-000041

POWER SUPPLY ASSEMBLY 120V

50/60

Hz.

127-000042

POWER

SUPPLY

ASSEMBLY

220V

50/60

Hz.

127-000043

Power

Supply

Chassis

041-033662

Terminal Strip

Assembly

006-028913

Transformer

120V

60

Hz.

003-033473

Transformer

120/220V 50/60

Hz.

003-033474

Capacitor, Electrolytic

500

mfd/40V

407-090329

Diode

4 used

001-024051

Resistor

IK 3W

602-050141

Resistor

68 Ohms 3W

602-050021

MISCELLANEOUS

vjencraiur rau,

wjpcca v^iip

IvCVCi UCl

allLf 11

Uiill

rVi^sClilUiy

121-000002

PnwiH* Siinnlv r^itfilf^

011-024357

nrAt*iinfnsil

PfiTiAl A6617 {Vi^lrwt^fi^n 1?AVAi*h Xr Atinn^

ICIIllIlKtl

A

itllCl r^90jr« ^Ud^WCCIA

IVCVClli

OL

xXlU^J

006-034306

011-036623

011-036741

SlriiPl/iP/i I pqH Pliior A cc\/ ihA^\x/ppn PrpQinr* \/ir> A trir* i

OlllClilCli

J-^CaU.

Oc

I

lU^ rxo^y

,

\^UClVVCCli

i

iCaliip

OC

Y iU. r\.lliyj

200-010327

RKI^IflipH f ^ PI110 A 66V rfipfwppfi Pn^sitnn ^ A/iK Amn^

200-010328

Shielded T end ^

Pliia

A«ev TRed Reverb Cahle^

011-036643

^lilplHprf T pqH PliiQ A ccv ^(TrQv RpvaitH I^iiHIaI

011-036644

010-042054

Snpakpr

11"

H VipwpH from Reari

014-030812

^np^lrAr O'' /'f IT ViAWAd fr#itTi RAfir'k

opcdivcr

lib \^jL/.

II*

vicwdi

irum jvcoi^

014-02729'?

l^aKlA JUr PI110 A66\7 ^RI If nliio naVAt^ at Amti^

0I1-0363RS

Tprminal Cnvpi* ^^Inwpr tn;iniiAll

l^llllllKll V^V/Y^l llv/Wwl

ilKHlUCUf

041-024164

r»rnrnmpf Tlowpr injiniian

VJI

lll./WV'l 1110.11 ttcli^

043-039553

Q%x7Pil PpHoI I-Ir%iicinrr AccpmKtlx/

OWcll rCilai

OUUMli^ rVaSClllUiy

046-02S206

/\nipiii]i?r

Dasc

009^124824

Pvid Rl#\/«]r f rku/Ar T fl

I!«IlU DIUdk

—

I^UWCA

JU.O.

02^^2840^

Fnd RInrk Rr^irket

035-031459

FnH Rlnrk I nwpr R H

C/llii DIUCIV

—

L^UvVCI

Iv.

11.

02S-028407

1

criiiiiiai i3trip /Yddciiiuiy

^^oiicii^

006-043833

vyciieiiiii#r icc-i^iti

999-032998

043-024246

^

£kYlA't*4 ^/"kV lA/ 0 c ri Of*

vjcncraior yydsiicr

qoQ.OOOl

04

VlCllCltlliil

ITI

\/U1II.I11k

OvACW

824-121114

Plocfir*

'T1P6

1

iaollVK

X ICd

013-031744

v/ll 1 UUC

/TdaclIlUiy

01

5-025581

Trim QfrSn /QwaII PAdnH

055-02^648

Prnnf ^trin riTUifiiijil^

1

ILFlll k3

llip

^llMllAUal^

061-031029

Cable

Clip

013-024296

Pedal Filter

Choke Assembly

003-025333

WOODWORK

Cabinet

Assembly

L-212

Case Assembly

Rear

Cover

Fastener

Brad

Fastener "Clip"

(Rear

Cover)

Baffle

&

Grille

Cloth

Lock Nut

(Speaker

&

Baffle

Mounting)

Baffle

(only)

Grille Cloth

Standard

Mounting

Soew

Plastic

Bumper

Top

&

Music

Panel

Assembly

Top

Panel

Music

Panel

Hinge

Screw

Top

Rail

Screw

Stud

(Top

Panel)

Brach

Assembly

111-000115

050-036895

056-040228

013-040269

999-040271

013-036811

052-

036887

999-001437

054-025432

053-

038428

999-006116

025-023329
050-002778

050-000840

050-038295

032-033414

880-030537

832-081814

044-042417

152-000024

Cabinet

Assembly

L-222

Case

Assembly

Rear

Cover

Fastener (Rear Cover)

Brad

Fastener

"Clip"

(Rear

Cover)

Baffle &

Grille Cloth

Lock Nut

(Speaker

&

Baffle

Mounting)

Baffle (only)

Grille Cloth

Standard

Mounting Screw

Plastic Bumper

Top

&

Music Panel

Assembly

Top

Panel

Music

Panel

Hinge

Screw

Top

Rail Sorew

Stud (Top

Panel)

Bench

Assembly

Cabinet Assembly

L-295

Case

Assembly

Rear Cover

Fastener (Rear

Cover)

Brad

Fastener "Clip"

(Rear

Cover)

Baffle

&

Grille Cloth

Lock Nut

Baffle (only)

Grille

Cloth

Standard

Mounting Screw

Plastic Bumper

111-000116

050-025470

056-040228

013-040269

999-040271

013-036811

052-

036887

999-001437

054-025432

053-

038428

999-006116

025-023329

050-002807
050-000840

050-025427

032-033414

880-030537

832-081814

044-042417

152-000027

111-000125

050-002100
056-044430

013-040269

999-040271
013-036811

052-

036890

999-001437
054-025432

053-

032909

999-006116

025-023329

Top

Panel

Music

Panel

050-002134
050-002130

NOTES

HO-735

lM-5/75

DIV.

^

Printed

U.SA.

6-26