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ISI

10W

PA

AMPLIFIER

N

A

DIVISION

OF

LEAR

SIEGLER,

INC.

Model

C10

DESCRIPTION

Bogen

Model

CIO

is

a

fully

transistorized

public

address

amplifier

rated

at

10

watts.

The

unit

will

accommodate

one

high

impedance

microphone

and

one

auxiliary

program

source,

such

as

a

tuner,

tape

recorder,

or

phonograph

with

ceramic

cartridge.

Individual

controls

are

provided

for

the

microphone

and

auxiliary

inputs

along

with

a

treble

control

for

adjustment

of

tonal

balance.

Balanced

or

unbalanced

outputs

are

provided

for

4,

8.

and

16-ohm

speakers,

and

25-volt

(62.5

ohms)

or

70-volt

(500

ohms)

constant-voltage

systems.

A

terminal

strip

with

screw

terminals

allows

convenient

connection

of

speakers,

except

TO-volt.

For

70-volt

operation,

a

quick-disconnect

speaker

socket

is

pr6-

vided.

The

CIO

operates

from

a

120-volt.

60

Hz

source

and

has

a

maximum

power

consumption

of

46

watts.

A

thermostat

enclosed

in

the

power

transformer

protects

the

amplifier

against

overloads.

POWER

AND

GROUNDING

The

amplifier

is

furnished

with

an

ac

line

cord

terminated

in

a

three-prong

plug.

The

line

cord

should

be

plugged

into

a

three-

wire

grounded

outlet

providing

a

nominal

120-volt.

60

Hz

power

source.

This

will

ground

the

amplifier

as

well

as

supply

power

to

it.

It

is

important

to

ground

the

amplifier.

Therefore,

if

a

three-

wire

outlet

is

not

available,

an

adapter

such

as

Leviton

No.

5017

should

be

used

to

convert

a

standard

two-wire

outlet

for

use

with

three-wire

plugs.

The

adapter

is

provided

with

a

grounding

pigtail

which

should

be

connected

to

the

screw

holding

the

wall

plate

to

the

receptacle.

In

some

areas,

the

wall

plate

screw

is

not

grounded.

In

this

case

it

will

be

necessary

to

connect

a

grounding

wire

from

the

GND

terminal

on

the

rear

chassis

of

the

amplifier

to

a

water

or

steam

pipe.

INSTALLATION

UNPACKING

The

amplifier

was

carefully

checked

before

leaving

the

factory.

Inspect

the

shipping

container

and

unit

carefully

for

indications

of

improper

handling;

if

the

unit

has

been

damaged,

make

an

immediate

claim

to

the

distributor

from

whom

it

was

purchased,

or

if

the

amplifier

was

shipped

directly

to

you,

notify

the

transportation

company

without

delay

and

place

your

claim.

INPUT

CONNECTIONS

Microphone:

Connect

the

microphone

to

the

MIC

receptacle

on

the

rear

panel.

The

microphone

should

be

of

the

high-impedance

ceramic,

or

dynamic

type.

Connect

the

microphone

as

shown

in

figure

1.

The

length

of

the

interconnecting

cable

should

be

under

35

feet.

Where

longer

lines

are

necessary,

a

low

impedance

microphone

should

be

used

along

with

a

suitable

in-line

type

microphone

transformer.

t

TECHNICAL

SPECIFICATIONS

POWER

OUTPUT:

10

Watts

FREQUENCY

RESPONSE:

80

to

10.000

Hz

t

2

dB

HUM

AND

NOISE:

MIC

Input

60

dB

below

rated

output;

AUX

Input,

70

dB

below

rated

output

INPUTS:

1

Hi-Z

MIC

convertible

to

Lo-Z

balanced

(150-200

ohms)

with

mic

xfmr.

AUX

Input

Hi-Z.

Pro

vision

for

WMT-1.

OUTPUTS:

Speaker

4,

8,

and

16-ohms.

25

volt

(62.1

ohms),

and

70

volt

(500

ohms)

line.

Screw

terminals

on

terminal

strip

for

speaker

connections

TONE

CONTROL

ACTION:

TREBLE

10

kHz,

-11

dB

CONTROLS:

Microphone

Volume.

AUX

Volume.

Treble

SEMICONDUCTORS:

All

Silicon;

7

Transistors.

4

Diodes

POWER

CONSUMPTION:

46

W,

120

VAC.

60

Hz

DIMENSIONS:

l

l-3/8''W

x

2.7/8"H

x

7.3/4''D(28.9x

7.3

X

19,7

cm)

WEIGHT:

5

lbs.

(2.27

kg)

PRINTED

IN

U

S.A.

904

54-5615-08

Hl-Z

MIC

AMPH.

75-MCIF

1

A74-I7«»-0I

Figure

1

—

Connecting

Hi-Z

Mic

Microphone

Precedence:

Microphone

precedence

may

be

accomplished

by

connecting

the

circuit

shown

in

fi

gure

2.

The

equipment

consists

of

a

microphone,

a

Y-adapier.

a

single-

conductor

shielded

cable

(20

feet

maximum

length)

and

a

SPDT

switch.

If

the

microphone

switch

has

an

extra

set

of

contacts

for

controlling

an

external

circuit

the

SPDT

switch

is

not

required.

Plug

the

Y-adapter

into

the

AUX

input

jack

on

the

rear

of

the

amplifier.

Connect

the

program

source

and

precedence

switch

to

the

Y-adapter.

as

shown

in

the

diagram.

Connect

the

microphone

input-to

the

MIC

input

Jack.

Phono:

Connect

a

phonograph

(with

ceramic

cartridge)

to

the

AUX

jack,

using

a

single-conductor

shielded

cable

terminated

in

a

standard

RCA

phono

plug.

It

is

recommended

that

a

separate

ground

wire

be

connected

between

the

phono

player

base

and

the

amplifier

GND

terminal

to

minimize

hum

pick-up.

Tuner,

Tape,

etc.:

The

AUX

input

may

be

used

for

sources

other

than

a

phonograph.

Any

signal

source

having

a

high-level

(.

I5-3V)

output

may

be

connected

to

these

inputs.

This

includes

such

Bogen

equipment

as

the

Model

TPI60B

AM/FM

tuner.

Caution

To

minimize

shock

hazard.

Class

/

wiring

as

defined

in

heal

budding

codes

should

he

used

for

70-volt

outputs.

Ail

other

outputs

may

use

Class

2

wiring.

When

the

speaker

socket

is

used,

connect

the

wired

plug

to

the

socket.

Attach

the

impedance

selector

lead

to

the

output

terminal

which

corresponds

to

the

speaker

system

impedance.

For

70-voll

operation,

it

is

only

necessary

to

connect

the

wired

plug

to

the

quick-disconnect

speaker

socket,

leaving

the

impedance

selector

disconnected.

Note

that

the

arrangement

in

fi

gure

4

is

for

unbalanced

speaker

lines,

with

the

link

between

COM

and

GND

closed.

For

balanced

lines,

open

the

link

between

COM

and

GND.

Note

For

balanced

output

lines,

remove

the

link

between

COM

and

GND

output

terminals.

If

the

line

is

shielded,

connect

the

shield

to

GND.

AMPLIFIER

I

GND

COM

16/1

AMPLIFIER

2

GND

COM

ISil

A74-2022-0t

Figure

4

Connecting

Amplifiers

in

Series

25V

20W

OUTPUT

CONNECTIONS

Speakers:

The

amplifier

may

be

used

with

speaker

systems

rated

at

4,

8

and

16-ohms

and

with

25-volt

and

70-volt

constant

voltage

systems.

For

detailed

information

on

the

installation

of

multiple

speaker

systems,

refer

to

Speaker

Installation

Bulletin

(no.

54-5001).

In

permanent

installations,

where

speakers

will

remain

connected

to

the

amplifier,

connect

the

speaker

system

directly

to

the

Speaker

Output

terminals

on

the

rear

of

the

amplifier.

Connect

one

speaker

lead

to

the

COM

terminal

and

the

other

to

the

terminal

corresponding

to

the

impedance

of

the

speaker

system.

Connecting

Amplifiers

In

Series:

Pairs

of

Bogen

C10

Amplifiers

can

be

connected

in

series

to

effectively

double

the

power

output

into

the

same

speaker

system.

See

figure

4

for

connection

diagram.

Be

certain

to

remove

the

link

between

COM

and

GND

of

amplifier

No.

2.

Note

that

this

arrangement

is

for

unbalanced

speaker

lines.

For

balanced

lines

also

remove

the

link

between

COM

and

GND

of

amplifier

No.

I.

The

input

cabling

must

be

arranged

to

parallel

the

inputs

of

the

two

amplifiers,

and

the

volume

and

tone

controls

of

both

amplifiers

must

be

at

the

same

setting

to

assure

that

each

amplifier

will

share

the

load

equally.

H

t

miaioFHOHt

(SHUK

490

OR

EOUIVALEKT)

D:

MC

SWITCH

<DPOT)

HR

0-

M

r

RAM

r-AOAPTER

(SWITO«CftAFT

NO.

SSO

Fl

OR

EQUIVALENT!

SOURCE

I

FOR

TOV

OPERATION

FOR

25V

OPERATION

OR

SELECTED

IMPEDANCES

Figure

2

—

Microphone

Precedence

Circuit

Figure

3

—

Speaker

Output

Plug

Wiring

OPERATION

Power:

The

POWER

switch

on

the

front

panel

turns

the

amplifier

ON

or

OFF.

Mic:

The

MIC

control

on

the

front

panel

is

used

to

adjust

the

volume

of

the

microphone

input.

Rotate

the

control

clockwise

{to

the

higher

numbers)

to

increase

volume.

Set

the

control

to

the

minimum

position

(0)

when

the

microphone

input

is

not

used.

Aux:

The

AUX

control

adjusts

the

volume

of

the

auxiliary

input.

Treble:

Use

the

TREBLE

control

to

adjust

the

tonal

balance

of

the

amplifier

output.

The

maximum

clockwise

position

provides

fl

at

frequency

response

and

counterclockwise

pro

duces

high

frequency

attentuation.

This

control

can

also

be

used

to

remove

high-frequency

noise(such

as

record

scratch)

by

rotating

it

in

the

counterclockwise

direction.

ACCESSORIES

WMT-1

Line

Matching

Transformer:

The

Bogen

WMT-1

Line

Matching

Transformer

provides

an

impedance

match

between

the

amplifier

and

a

0

level.

500,

600-ohm

line.

This

may

be

a

telephone

line

connected

to

the

switchboard

for

internal

paging

or

used

with

a

wired

music

system.

No

soldering

is

required

to

connect

the

WMT-1

to

the

amplifier.

To

connect

the

input

from

a

balanced

500,/600-ohm

telephone

line,

mount

the

WMT-1

on

the

rear

panel

of

the

amplitier.

using

the

holes

indicated

on

the

rear

panel.

Connect

the

input

line

to

the

three-screw

terminal

board

on

the

WMT-L

Connect

the

phono

plug

on

the

WMT-I

cable

to

the

AUX

jack

on

the

rear

ot

the

amplifier.

If

this

jack

is

being

used

for

other

sound

inputs,

the

WMT-1

may

be

connected

to

the

MIC

input.

In

order

to

do

this,

the

WMT-1

wiring

must

be

modified

as

described

in

the

instruction

sheet

supplied

with

the

WMT-L

RPK-35

Rack

Panel:

The

Bogen

Model

RPK-35

Rack

Panel

is

designed

to

mount

the

amplifier

in

a

standard

19-inch

sound

rack.

The

rack

panel

is

finished

in

gray

enamel.

WMK-1

In-Wall

Mounting

Kit:

The

Bogen

Model

WMK-1

In-

Wall

Mounting

Kit

is

designed

to

mount

the

amplifier

fl

ush

in

a

wall.

Depth

of

the

mounted

unit

is

3'/3

inches.

MAINTENANCE

Camion

There

are

no

user

replaceable

pans

within

the

unit.

Have

all

internal

servicing

done

hv

a

qualified

technician.

4S-»ftlS

-01

..

.

..

.0

RESISTORS

ARC

l/l

CAPACITORS

ARE

IN

MfO.

UNLESS

OTHEirviSC

SPEClPieO

ALL

VXTAOCS

ARE

Figure

5

—

Model

CIO

Amplifier,

Schematic

Diagram

3

OVERLOAD

PROTECTION

The

amplifier

output

is

protected

against

overload

and

shorted

speaker

lines

by

a

thermostat

enclosed

in

the

power

transformer.

If

the

breaker

opens,

the

amplifier

will

have

no

output.

Set

the

ac

power

switch

to

off

and

wait

a

reasonable

time

for

the

breaker

to

reset.

Return

the

ac

power

switch

to

on.

If

the

breaker

trips

again,

do

not

attempt

to

reset

it

but

have

the

trouble

investigated

by

a

qualified

technician.

REPLACING

TRANSISTORS

When

replacing

the

output

transistors,

clean

all

foreign

matter

from

the

heat

sink,

insulator,

and

transistor.

Brush

a

generous

amount

of

silicon

compound

to

completely

cover

both

surfaces

of

the

insulator.

Place

the

insulator

between

the

heat

sink

and

the

replacement

transistor.

Use

the

original

transistor

mounting

hardware

to

mount

the

replacement

transistor.

Cauiion

AII

transistors

are

soldered

to

ensure

maximum

reliability.

When

soldering

leads,

use

a

heat

sink

(such

as

a

small

alligator

clip)

between

the

transistor

and

the

source

of

heat.

BOGEN

SERVICE

We

are

interested

in

your

Bogen

equipment

for

as

long

as

you

have

it.

If

trouble

ever

develops,

do

not

hesitate

to

ask

our

advice

or

assistance.

Information

can

be

obtained

by

writing

to

Service

Department,

Bogen

Division,

P.O.

Box

500.

Paramus,

N.J.

07652.

When

communicating

with

us,

give

the

model

and

series

designation

of

your

unit.

Describe

the

difficulty

and

include

details

on

the

electrical

connections

to

associated

equipment,

and

list

such

equipment.

When

we

receive

this

information,

we

will

send

you

service

information

if

the

trouble

appears

to

be

simple.

If

the

trouble

requires

servicing,

we

shall

send

you

the

name

and

address

of

the

nearest

Bogen

authorized

service

agency

to

which

you

can

send

your

unit

for

repairs.

When

shipping

your

unit,

pack

the

amplifier

well,

using

the

original

shipping

carton,

or

a

similar

container

and

filler

material,

to

prevent

damage

in

transit.

Send

the

unit

fully

insured

and

prepaid.

The

unit

will

be

promptly

repaired

and

returned

to

you.

REPLACEMENT

PARTS

Most

components

are

standard

parts

available

through

reputable

sources.

The

parts

listed

here

may

be

obtained

from

Bogen

distributors,

service

agencies

or

directly

from

the

factory.

When

ordering

a

part,

specify

a

part

number

and

description

of

the

part

as

listed.

Specify

the

model

of

the

unit

and

give

the

series

designation,

which

is

a

letter

followed

by

numbers,

printed

on

the

chassis.

For

parts

on

circuit

boards,

also

give

the

component

board

assembly

number,

which

begins

with

"45."

When

replacing

transistors,

use

those

made

by

the

specified

manufacturers.

Transistors

from

other

suppliers

may

not

be

satisfactory.

Certain

resistors

must

be

Allen-Bradley.

These

are

designated

by

"AB"

on

the

schematic

diagram.

Ref.

No.

Part

No.

Description

A1

45-9915-01

Board

ass'y.,

complete

CIO

79-112-006

Capacitor,

Electrolytic,

10(X)^F,

55V

Cll

79-008-058

Capacitor,

Electrolytic,

10/iF,

50V

CI2

79-008-064

Capacitor,

Electrolytic,

330mF,

50V

CI6.

C17

79-008-062

Capacitor,

Electrolytic.

100/iF,

50V

C21

79-112-004

Capacitor,

Electrolytic,

500mF,

40V

CRl,

CR2

96-5193-01

Diode,

200

PIV,

2A

CR3

96-5202-01

Diode,

HVR3

CR4

96-5333-01

Diode,

400

PIV.

lA

Q1

96-5213-01

Transistor,

2N5089

or

96-5346-01

Transistor,

BC239C

Q2

96-5298-01

Transistor.

SPS-t910

Q3.

Q5

96-5283-01

Transistor,

MPS

A55

Q4

96-5290-01

Transistor,

MPS

A05

R4

77-001-712

Control,

AUX

Volume.

2

Meg.

Rll

77-001-711

Control,

MIC

Volume,

AUX

Volume,

1

Meg.

R12

77-001-731

Control,

TREBLE,

1

Meg.

R29,

3!

76-147-127

Resistor,

5.6

ohm,

'/^W

R30

76-113-099

Resistor,

0.27

ohm,

5W

Chassis

Electrical

Parts

Q101,

Q102

96-5232-03

SWIOI

81-003-060

TlOl

TI02

83-772-000

83-434-000

Transistor

Switch,

Power

Transformer,

Power

(with

110-

degree

thermostat

enclosed

in

transformer)

Transformer,

Output

Front

Panel

Pans

03-0651-01

Knob

ISI

ISI.

A

DIVISION

OF

l-E*n

SlEGLER.

INC

P.O.

Box

500.

Paiamu*.

NJ

07652

'2384