Infinity Overture 1 Manuale utente

PRELIMINARY

SERVICE

MANUAL

COMPOSITION

OVERTURE

1

Powered

3-way

Loudspeaker

Infinity

Systems,

Inc.

250

Crossways

Park

Dr.

Woodbury,

New

York

11797

—

CONTENTS

-

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FUSE

REPLACEMENT.

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TROUBLESHOOTING.

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SERVICE

BULLETINS

(2)

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SCHEMATICS:

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PASSIVE

NETWORK

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4

PERFORMANCE

DATA

DRIVE

UNITS

AMPLIFIER

(BUILT-IN

POWER

AMPLIFIER

FOR

LOW-FREQUENCY

SECTION)

DIMENSIONS

(also

see

inside

front

cover)

SPECIFICATIONS

—

OVTR

1

Frequency

Range:

Sensitivity:

Impedance:

Maximum

Peak

Output:

Amplifier

Requirements:

Low

Frequency:

Mid

Frequency:

High

Frequency:

Crossover

Frequencies:

Peak

Output:

Power

Supply:

Power

Consumption:

Width:

Height:

Depth:

Weight:

35

~

20,000

Hz

92

dB

spl

@

1

m/2.83

V

(anechoic

conditions)

8

QO

nominal

108

dB

(spl

on

program)

Recommended

for

use

with

amphfiers

10

~

100

W

(@

8

Q)

One

8"

(200

mm)

high-efficiency,

ultra-linear,

long-throw,

magnetically-

shielded

woofer

Two

4"

(100

mm)

high-efficiency,

magnetically-shielded,

mid-range

drivers

One

1"

(25

mm)

soft

dome,

high-efficiency,

neodymium

magnet,

magnetically-

shielded

tweeter

300

and

3,000

Hz

250

VA

120

V~60

Hz

150

W

(maximum),

7

W

(standby)

5

¥4"

(146

mm)

12

Y2"

(318

mm)

12

4"

(318

mm)

28.5

lb

or

12.95

kg

(each)

Compositions

Overture

OVTR

1

-.

N

IMPORTANT!

POWER

ON...

CHECKING

PLAYBACK...

Figure

8.

Located

on

each

OVTR

I’s

rear

panel

are

a

BASS

level

control

and

a

dual-color

“Power

On”

LED.

.

Compositions

Overture

OVTR

1

-

OPERATING

THE

SYSTEM

Each

Compositions

Overture

OVTR

1

speaker

system

contains

a

built-in

powered

subwoofer.

For

your

convenience,

the

system

is

not

fitted

with

a

power

on/off

switch.

Instead,

an

auto-sense

circuit

will

instantly

switch

the

system

on

when

an

audio

signal

is

present,

and

will

automatically

revert

to

standby

(drawing

only

7

watts)

when

audio

is

absent

for

a

minimum

of

10

minutes.

A

dual-color

“Power

On”

LED

(see

Figure

8

below)

glows

red

when

the

amplifier

is

the

stand-by

mode

and

green

when

the

amplifier

is

on.

If

on/off

switching

is

desired,

connect

the

OVTR

1’s

ac

power

cord

to

an

ac

switched

outlet.

If

you

plan

to

leave

for

an

extended

period

of

time

(e.g.,

vacation),

switch

the

system

off

(or

unplug

the

ac

power

cord).

This

product

is

designed

for

(USA)

120

Vac

use

only.

Do

not

connect

it

to

any

other

line

voltages.

1.

After

speaker

wiring

has

been

completed,

connect

each

speaker’s

ac

power

cord

to

the

nearest

ac

receptacle.

You

should

see

an

LED

illuminate,

indicating

the

amplifier

is

on

(see

Figure

8

below).

If

not,

verify

the

ac

outlet

is

delivering

power

or

refer

to

Troubleshooting

2.

Check

the

speakers

for

playback

by

first

setting

the

audio

system

volume

control

for

a

minimum

level,

and

then

applying

power

to

your

system.

Play

a

favorite

music

or

video

segment

and

increase

the

volume

control

to

a

comfortable

level.

NOTE:

You

should

hear

balanced

audio

reproduction

across

the

entire

frequency

spectrum.

If

not,

check

all

wiring

ConmechOls

and

refer

to

the

“Troubleshooting”

section

et

ee

oO

|

ce)

MAX

MIN

Oo

o

More

C)

Less

Bass

>

Bass

e

o

BASS

CONTROL

ON

/

STANDBY

Power

On

CS

Stand-By

is

green

is

red

“POWER

ON”

LED

OVTR

1

OVTR

1

°

(rear

view)

°

OPERATING

THE

SYSTEM

(CONT’D)

3.

Listen

to

a

variety

of

music

selections

and

note

the

bass

level.

If

you

feel

there

is

too

much

bass,

you

can

reduce

it

by

adjusting

the

BASS

control

from

the

“normal”

center-detent

position

towards

the

MIN

setting

(see

Figure

8

on

Conversely,

if

you

want

more

bass

output,

rotate

the

level

control

towards

the

MAX

setting.

|

JUDGING

BASS

LEVEL...

|

NOTE:

The

amount

of

bass

you

hear

will

be

affected

by

a

number

of

|

different

factors,

including

the

room’s

size

and

shape,

the

construction

|

materials

used

to

build

the

room,

the

listener’s

position

relative

to

the

|

speakers,

and

the

position

of

the

speakers

in

the

room.

If

there

is

too

.

much

bass,

move

the

speakers

away

from

nearby

walls.

ae

if

|

you

want

more

bass,

place

the

speakers

closer

to

the

walls

|

an

on

s

an

2

f

REPLACING

THE

FUSE

Compositions

Overture

OVTR

1

speakers

each

use

a

built-in

fuse

to

|

protect

the

subwoofer

amplifier.

To

replace

a

fuse

with

a

new

one

(see

enclosed

spare),

perform

the

following

procedure:

1.

Unplug

the

speaker’s

ac

power

cord.

Then

turn

the

speaker

around

to

access

the

fuse

holder

on

the

rear

panel

(refer

to

Figure

9

below).

2.

Using

a

small

flat-blade

screwdriver,

place

the

tip

in

the

indent

and

turn

the

fuse

cap

counter-clockwise.

3.

Remove

the

old

fuse

and

replace

it

with

a

new

one

having

the

same

value

and

rating,

a

2AG

3A

SB

250V

fuse.

#

33/€0€30-00/

IMPORTANT!

Do

not

substitute

the

blown

fuse

with

another

fuse

value

or

rating.

Doing

so

will

void

the

warranty.

4.

Insert

the

cap

holding

the

new

fuse

into

the

holder

and

turn

clockwise

to

lock

it.

5.

Rotate

the

speaker

to

its

original

position.

Then

plug

the

speaker’s

ac

power

cord

back

into

the

nearest

ac

outlet.

OVTR

1

(rear

view)

Figure

9.

The

OVTR

I's

fuse

is

located

on

the

rear

panel

the

ac

power

cord.

FUSE

3A

200V

OVTR

1

FUSE

Compositions

Overture

OVTR

1

-

8

¢

Compositions

Overture

OVTR

1

-

CARE

OF

YOUR

SPEAKER

SYSTEM

The

dark

grey

metallic

finish

does

not

require

any

routine

maintenance.

When

needed,

use

a

soft

cloth,

dampened

with

water

only,

to

remove

any

fingerprints

or

to

wipe

off

dust.

Clean

the

grille

by

gentle

vacuuming

or

with

a

damp

cloth.

NOTE:

Do

not

use

any

cleaning

products

or

polishes

on

the

cabinet

or

grille.

For

maximum

acoustic

transparency,

the

grille

uses

a

lightweight

structure

that

needs

to

be

handled

with

care

for

removal.

To

remove

the

grille,

gently

pull

on

the

corners

to

unfasten

the

frame

from

the

cabinet.

To

replace

it,

make

sure

to

align

the

frame

pins

first

and

then

gently

snap

the

frame

into

place.

Never

force

the

grille

frame

onto

the

cabinet.

TROUBLESHOOTING’

SYMPTOM

SOLUTION

SESH

HEHESHEHHHSHSSHSEHHESTHEHSHEHSHEOHSHSHHESCESHEHSOHESHSESEEAESESHESTHEETEEHHTERHESDESEROEHSEHSEHDSE

ERASERS

Bass

reinforcement

im

room

Bass

level

is

too

high

Move

speakers

away

from

walls

Rotate

BASS

control

towards

“1”

(

SO

SHSAHTHHSESSHHHETHSEHHEEHEEHSHEESHHOEEESHHOHEHCOHSSAEHROSEHOCHEEEERHEHOESSESSESESEHERESE

HEHE

EOEODEC®S

Bass

sounds

distorted

Subwoofer

amplifier

has

reached

maximum

output

Bass

level

on

preamp/

receiver

is

set

too

high

Turn

down

volume

control

on

receiver

or

preamplifier

Set

bass

and

treble

flat;

use

controls

sparingly

Distortion

with

volume

control

near

Minimum

Defective

receiver

or

preamplifier;

shorted

speaker

wires

Repair

defective

receiver

or

preamplifier

SSCS

SS

ESOS

HEHEHE

SHEEEHEETESHEEOHEH

EOS

OHHHHHSESHOHAHESHESHSEHSESESHEEESESETOHEOESEEEEEHOREHRETEEOERESOE

Distortion

on

music

or

effects

peaks

(e.g.,

pops

or

noise)

Buzz,

hum,

or

crackle

when

connecting

wires

Dynamic

soundtrack

causes

subwoofer

to

“bottom”

out

Tone

controls

are

set

too

high

Connecting

wires

with

power

on

causes

transient

signal

spikes

Turn

down

master

volume

control

to

lower

overall

range

Set

bass

and

treble

flat;

use

controls

sparingly

Connect

wires

only

when

audio

system

power

1s

off

SPSS

SOHHHHHSHSSHAHOSCHHEHEHEESHETSHEHHHEESHHESCHHEHEHEETSEHEHOSESESCHOHSERESORERHEEHOHREEHEOROSSESEHEROOEAEE

No

sound

from

speaker

system;

power

LED

not

on

Power

cord

not

connected;

no

ac

power

Blown

fuse

Connect

ac

power

cord;

check

ac

outlet

Check

or

replace

fuse

*If

you

need

further

assistance,

contact

your

local

Infinity

retail

dealer.

Service

bulletin

INF9704

-

Nov.

1997

To:

All

Infinity

Service

Centers

Models:

Overture

1;

Overture

2;

Overture

3

Service

Bulletin

Subject:

Premature

muting

At

the

moment

the

bass

information

at

the

audio

input

terminals

exceeds

30

mV,

the

amplifier

in

the

Overture

series

switches

from

the

STANDBY

mode

to

the

ON

mode.

Approximately

10

minutes

after

the

bass

information

drops

below

the

sensing

threshold,

the

subwoofer

amplifier

retums

to

STANDBY.

Some

customers

may

experience

a

tendency

for

the

Overture

1,

2

or

3

to

“mute”

or

shut

down

when

played

at

a

low

level

and

negligible

bass

information

is

present.

Actually,

this

is

normal

behavior

for

the

loudspeaker.

/f

the

unit

was

designed

to

be

extremely

sensitive,

the

bass

amplifier

could

sense

small

amounts

of

60

Hz

hum

or

noise

picked

up

by

the

customer's

input

cables,

random

RF

noise,

etc.

and

the

unit

would

never

tum

off.

In

the

event

you

receive

a

Overture

1,

2

or

3

with

the

complaint

“unit

is

shutting

off

(muting)

when

low

levels

of

music

are

being

played”,

this

complaint

can

be

resolved

by

the

replacing

C20

(220uf/25v)

on

the

PCB

with

a

2200uf/25v

capacitor.

This

change

will

lengthen

the

delay

time

for

muting

to

50-60

minutes.

Procedure,

Overture

1:

1)

With

a

sharp

instrument,

carefully

pry

out

and

remove

the

metal

grille

covering

the

woofer,

taking

note

of

the

(4)

rubber

corners

on

the

grille.

2)

Pull

back

the

circular

rubber

flap

and

remove

the

(6)

woofer

mounting

screws

and

their

clamps.

3)

Remove

the

woofer

from

the

cabinet

by

pulling

on

the

rubber

flap,

then

unplug

the

yellow

connecting

wires.

4)

Remove

the

dacron

section

from

the

cabinet.

5)

Outside

the

cabinet,

remove

the

(2)

Phillips

screws

on

the

cabinet

end,

amplifier

side.

6)

Inside

the

cabinet,

remove

the

(2)

amplifier

mounting

nuts.

These

may

be

covered

with

a

sealant

and

will

have

to

be

cleaned

off

before

removal.

7)

Unplug

the

(2)

white

wires

w/spade

terminals

connected

to

the

crossover

assembly.

8)

Remove

the

amplifier

assembly

from

the

cabinet.

9)

Unplug

the

AC

input

wires;

remove

the

transistor

clamp

and

the

two

mounting

nuts

from

the

PCB.

10)

Locate

C20

(See

Figure

1).

Remove

and

replace

with

2200uf/25v

capacitor

(Infinity

part

#

201-8120).

11)

Replace

the

PCB

in

the

heatsink,

taking

care

to

replace

the

insulating

fishpaper

under

the

PCB

and

the

output

transistors.

12)

Re-assemble

and

replace

the

amp

assembly

into

the

cabinet

in

reverse

order,

taking

special

precautions:

a)

There

are

two

gaskets

under

the

woofer

basket,

assure

they

are

both

in

place

upon

re-assembly.

b)

The

(6)

clamps

under

the

woofer

mounting

screws

are

not

symmetrical;

make

sure

the

shorter

side

of

the

clamps

are

pointing

towards

the

center

of

the

woofer

cone.

c)

Tighten

the

(6)

final

woofer

mounting

screws

sequentially;

do

not

over

tighten.

d)

Before

replacing

the

metal

grille,

place

the

rubber

corner(s)

on

each

corner

of

the

grille.

FIGURE

1

rao

ee

1

aii

8

ais

Infinity

Systems,

Inc.

250

Crossways

Park

Drive,

Woodbury,

New

York

11797

(516)

496-3400

L,

YW)

r)

In

A

Service

Bulletin

Service

bulletin

INF9705

-

Nov.

1997

To:

All

Infinity

Service

Centers

Models:

Overture

1;

Overture

2;

Overture

3

Subject:

Unit

cycles

on

&

off

with

no

music

signal

Operation

principle

of

Auto

ON/OFF

circuit:

in

Overture

1,

Overture

2,

Overture

3:

The

Mid

and

High

frequency

transducers

of

Overture

1

or

2

or

3

are

powered

by

the

receiver

or

power

amplifier

connected

to

the

input

terminals

of

Overture

1

or

2

or

3.

The

Subwoofer

transducer

in

Overture

1

and

2

and

3

is

powered

by

a

subwoofer

amplifier

inside

the

Overture

speaker

enclosure.

At

the

moment

audio

signals

at

the

Overture

input

terminals

exceeds

a

level

of

30

mV,

the

Overture

Auto

detect

circuit

will

switch

the

subwoofer

amplifier

from

the

STANDBY

to

the

ON

mode.

Approximately

10

minutes

after

the

audio

information

drops

below

the

sensing

threshold,

the

Auto

detect

circuit

will

switch

the

subwoofer

amplifier

from

the

ON

mode

to

the

STANDBY

mode.

AUTO

ON

due

to

noise:

Most

amplifiers

or

receivers,

while

in

the

Power

OFF

mode,

have

an

output

impedance

at

their

speaker

terminals

in

the

order

of

several

kilo

Ohms.

However,

certain

types

or

receivers

and

power

amplifiers

disconnect

the

power

amplifier

section

from

the

speaker

terminals

by

means

of

a

relay.

As

result,

the

speaker

cables

connected

to

the

Overture

input

terminals

may

pick

up

RF

or

50/60

Hz

noise.

This

noise

can

activate

the

Auto

detect

circuit

in

Overture

and

switch

the

subwoofer

amplifier

to

the

ON

mode.

Approximately

10

minutes

after

the

noise

disappears,

the

Auto

detect

circuit

will

switch

the

subwoofer

amplifier

back

to

the

STANDBY

mode.

As

result,

the

customer

may

hear

continual

ON-OFF

cycling

of

the

subwoofer

amplifier.

In

the

event

you

receive

a

Overture

1,

2

or

3

with

the

complaint

“unit

is

turning

on

&

off

(audible

relay

clicking)

even

though

the

receiver

is

turned

off”,

insert

a

banana

plug

w/

1000Q

terminating

resistor

(Infinity

part#

518-0425)

into

the

Overture

banana

speaker

jacks.

Infinity

Systems,

Inc.

250

Crossways

Park

Drive,

Woodbury,

New

York

11797

(516)

496-3400

PRIMARY

PARTS

LIST

|

PART

NUMBER

COSMETIC

PARTS

331197-001

331185-001

330956-001

332518-001

Accessory

kit:

332068-001

332336-001

332067-001

332182-001

332183-001

331630-001

CROSSOVER

PARTS

331211-001

331215-001

331630-001

331723-001

331724-001

146-8021

146-6461

DRIVERS/TRANDUCERS

332181-001

--

USE

333232-001

330638-001

331284-001

--

USE

331663-001

OVERTURE

1

DESCRIPTION

CABINET-BLACK

ASH

GRILLE

ASSY

W/LOGO

GRILLE

ASSY

(SIDE)

ASSY

BASE

(CRADLE)

FOOT

ADHESIVE

RUBBER

PLUG

FOOT

-

1/8

X

1/2

FOOT

-

1/4

X

1/2

3

AMP

FUSE

CROSSOVER

ASSY

COMP

1

AMP

ASSY

OVTR

1

SAMP

SB

FUSE

POST

-

RED

POST

-

BLACK

Knob

for

POT

|

TWEETER

(25MM)

M/|

MIDRANGE

4"

(M100-3)

M/|

LM

WOOFER

8"

(B200-1)

WaInfinity

MAR

24

1998

-Level.

X

..Part

Number..

X

AMO0000091

BR1412

BR1416

BR1419

FH1004

FS1064

HS1144

LB1265

LB1287

NU1049

PM1331

PM1385

P

SA0309111

IM1138

RS2153

IM1139

W1I1698

WI

1699

WI1651

$A0309121

IM1138

LE1034

IM1139

W11698

W11699

W11651

$A0309131

C01345

WI1671

WI1672

IM1139

SA0309141

CP1126

CP1630

CP

1656

CP1657

CP

1658

CP

1659

CP1660

CP

1661

CP1662

CP1663

CP

1664

CP

1665

CP

1666

CP1667

CP

1668

CP

1669

CP1670

CP1672

CP1673

-

= =

—

=

2

.2

=

©

=

ny

N

NN

MN DN

MN

NN

A

PM

MN

PN

me

—_

vu

NM

NM NM

NO

NNN

N

NNN NNN

NNN

NY DY

NH HW NP

NP

MF

JR

MF

JG

AG

JG

JR

JG

AG

JG

SM

JG

AG

MF

AG

JG

SM

SA

Procedure:

PDC-R-08

-

Account:

ELP54

Indented

Bill

of

Materials

Effectivity

Date

:

AM0000091

Snowball

Amplifier

97-1

Clamp

Transistor

Snowball

Plate

Amp

SnowBall

97-1

BAR AMP

ASSY.

SNOWBALL

97

Fuseholder

2AG

Chassis

Mo

Fuse

Slo-Blo

3A/250V

2AG

Heatsink

Snowball

97-1

Bar

Code

Traceability

Lab

Label

Amp.

SnowBall

97-1

Nut

8-32

x

1/4

Hex

Keps

S$

Plastic

Bag

Pink

Antistat

Styrofoam

Snowball

97-1

Level

Ctrl.

Assy.

Snowbal

Sleeving

Shrink

PVC

3/32

Potentiometer

20Kohm

20%

Sleeving

Shrink

PVC

3/16

WIRE

#

22

PREFUSED

BLACK

WIRE

#

22

PREFUSED

GREEN

Wire

#

22

Prefuse

Red

Led

Harness

Snowball

1

Sleeving

Shrink

PVC

3/32

led

Green/Red

Common

Cath

Sleeving

Shrink

PVC

3/16

WIRE

#

22

PREFUSED

BLACK

WIRE

#

22

PREFUSED

GREEN

Wire

#

22

Prefuse

Red

Input

Assy.

Snowball

1

Connector

Bindingpost

Pai

Wire

#18

16x30

UL1007

Red

Wire

#18

16x30

UL1007

Bla

Sleeving

Shrink

PVC

3/16

Preform

Assy.

Snowball

1

CAP

POLY

FILM

1tuF

10%

50V

Cap

Alum

El

220uF

20% 25v

Cap.

At

El

100uF

20%

NPE

Cap.

Al

El

220uF

20%

NPE

Cap.

Disc

100pF

10%

500V

Cap.

NPE

10uF

20%

25V

T/R

CAP

AL

EL

1000uF

20%

200V

Cap.

Alum

El.

100uF

20%

5

Cap.

Alum

El.

10uF

20%

35

Cap.

Alum

El.

47uF

20%

25

Cap.

Alum

EL.

4.70uF

20%

Cap.

Alum

EL.

10QuF

20%

63

Cap

Cer

Disc

68pF

20%

500

Cap.

Poly

Fil.

0.47uF

10%

Cap.

Alum

El.

47uF

20%

10

Cap.

Poly

Fil

.10uF

10%

4

Cap.

Poly

Fil

.039uF

5%

5

Cap

Poly

0.22uF

5%

63V

T/

Cap.

Pol

Fil

InF

10%

50v

Rev

Quantity.

01

00

01

00

01

00

02

01

00

02

01

00

02

00

01

00

1.0000

8.0000

1.0000

0.3333

1.0000

0.1250

1.0060

0.2084

0.2500

1.0000

0.1250

1.0000

0.2084

0.2500

1.0000

0.5000

0.2500

1.0000

4.0000

1.0000

2.0000

1.0000

5.0000

1.0000

2.0000

1.0000

2.0000

1.0000

3.0000

1.0000

U/M.

MB

.ECO....

EA

PC

EA

FT

EA

FT

EA

FT

EA

FT

EA

FT

EA

03-24-98

oaonwwvonwvrnvonwnwvdnwvwowrwnrawrwdnwnwoeoweEenuwnwoewwnizwvdowawwewwrztvowenowwoewerzaawaowiewnewoewawaeawnowowowewez

10070

10143

10070

10143

10070

Overture

1

ECO

Date

Strt

Use

End

Use

02-20-97

04-16-97

05-01-97

06-05-97

04-16-97

05-01-97

06-05-97

04-16-97

05-01-97

Page

1

Infinity Overture 1 Manuale utente

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