Yamaha CR-840 Bedienungsanleitung

1!_

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••

iVaafe*-:

YAMAHA

offers

you

thanks

and

congratulations

your

choice

the

CR-840

Receiver.

Embodying

the

most

up-to-date

and

useful

features,

combines

superb

broadcast

reception

with

the

finest

audio

quality,

and

currently

setting

new

standards

for

receiver

perform¬

ance

its

class.

All-in-One

Excellence

Accurately

matched

performance

specifications,

functions,

and

controls,

provide

overall

per¬

formance

which

fully

measures

Yamaha's

high

tuner,

preamplifier,

and

power

amp

standards.

Noise-Distortion

Clearance

Range

This

the

basic

concept

for

the

audio

section.

The

CR-840

offers

extremely

wide

range

output

power

level

for

which

both

noise

and

dis¬

tortion

are

below

the

rated

value,

ensure

wide

dynamic

range

actual

use.

Direct

Assessment

Differential

Gain

This

sophisticated

technique

enables

Yamaha

combine

high

station-receiving

ability,

razorsharp

tuning,

and

ultra-low

distortion

the

tuner

section.

Optimum

Tuning

System

The

OTS

system

will

take

over

from

you

the

fine-tuning

needed

obtain

minimum

distortion

and

maximum

stereo

separation,

that

all

stereo

programs

are

heard

their

best.

win-Meter

Tuning

with

Signal

Quality

Reading

Both

signal

strength

and

center-zero

tuning

meters

are

provided

the

CR-840,

with

the

signal

strength

meter

doubling

signal

quality

meter

FM.

Comprehensive

Tone/Filter

Controls

Both

bass

and

treble

controls

have

completely

"FLAT"

central

positions.

High

and

Low

filters

are

also

provided.

Continuous

Loudness

Compensation

This

Yamaha

'special'

fully

compensates

for

the

ears'

reduced

sensitivity

bass

and

treble

frequencies

low

listening

levels,

whatever

your

normal

maximum

listening

level.

Auto

Circuit

for

High

Quality

Reception

The

Auto

Circuit

permits

the

range

automatically

modified

according

the

quality

the

broadcast

being

received,

thereby

ensuring

high

sensitivity

and

high

selectivity

reception.

Special

Featurers

the

CR-840

Receiver.

...

Cautions—Read

this

before

Operating

Your

CR-840

Front

Panel

and

Controls

Connection

Diagram

....

Rear

Panel

and

Connections

Broadcast

Reception

....

.10

Listening

Records

.1.

LOUDNESS,

FILTERS,

and

TONE

Controls.

.14

The

Special

REC

OUT

Selector

Switch

....

Tape

Playback

and

Recordina

.16

Specifications.

Troubleshooting

...20

Block

Diagram..

■

.22

Schematic

Diagram.

.23

IMPORTANT!

Please

record

the

serial

number

your

unit

the

space

below

Model

Name

CR-840

Serial

No.

___

The

serial

number

located

the

rear

the

chassis.

Retain

this

Owner's

Manual

safe

place

for

future

reference.

The

CR-840

high

performance

AM/FM

stereo

receiver,

with

excellent

selectivity,

sensitivity,

low

distortion,

and

high

output

power.

This

manual

required

reading

you

are

get

the

best

from

its

special

features

and

controls.

not

drop

otherwise

jar

the

CR-840,

which

precision

electronic

instrument.

not

place

the

CR-840

where

will

exposed

direct

sunlight,

excessive

heat

(for

instance

over

radiator),

cold,

moisture,

dust.

not

use

chemical

solvents

(such

benzene

alcohol)

remove

traces

dirt.

Wipe

only

with

soft,

slightly

damp

cloth.

The

CR-840

heavy.

When

installing,

make

sure

select

firm

and

solid

base.

not

attempt

carry

out

internal

adjustments

repairs.

Leave

these

your

local

authorized

service

representative.

not

assume

your

CR-840

faulty

before

checking

the

'Trouble

Shooting"

list

provided

page

21.

not

connect

other

audio

equipment

the

spare

outlet

sockets

the

rear

panel

the

equipment

will

require

power

than

the

outlets

are

rated

provide.

Keep

this

manual

safe

place

for

future

refer¬

ence,

and

refer

frequently

until

you

are

completely

familiar

with

all

CR-840

controls

and

functions.

Warning

prevent

fire

shock

hazard,

not

expose

this

appliance

rain

moisture.

Operate

all

switches

and

knobs

accordance

with

the

instructions.

Avoid

applying

undue

force,

which

should

never

necessary,

and

not

attempt

use

between

switch

positions.

^POWER

OFy/OFF

Switch

activate

the

main

electrical

supply.

Leave

OFF

while

familiarizing

yourself

with

the

controls,

and

while

connecting

other

audio

equip¬

ment.

@POWER(

Power

Indlicstsor)

This

Jight-emitting

diode

gives

visible

indication

the

Power

being

ON.

§SIGWAL

QUALITY

IVSsSer

This

meter

indicates

the

signal

strength

for

both

and'

stations,

and

also

indicates

the

presence

interference

oscillations

the

meter

indicator,

with

the

amplitude

the

indica¬

tor

fluctuations

showing

the

extent

the

interference.

0The

FM/AM

Tuning

E!e®ie

The

upper

scale

gives

station

frequencies

MHz

and

the

lower

scale

gives

frequencies

kHz.

the

right-hand

side

the

front

panel,

the

LEDs

light

indicate

operation.

This

used

when

tuning

stations:

the

indi¬

cator

points

dead

center

when

the

station

perfectly

tune.

©DIAL

POINTER

Turn

the

tuning

knob

align

this

pointer

desired

station.

@HEC

OUT

SELECTOR

This

selects

which

program

source

will

recorded,

just

input

selector

selects

which

program

source

will

heard.

With

the

CR-840,

you

can

listen

one

program

source

while

recording

any

other

{copy

friend's

tape

while

listening

FM,

etc.).

This

eliminates

"dead"

time

while

you

are

taping,

permitting

you

enjoy

the

use

your

CR-840

while

recording.

©IWPUT

SELECTOR

This

selector

switch

used

select

the

program

source

your

choice,

whether

Phono,

Tuner,

one

two

tape

decks,

Aux

(for

use

with

8-track

tape

cartridge

playback,

etc.).

The

phono

switch

position

input

circuit

designed

operate

with

normal

moving

magnet

(MM)

type

cartridges.

Use

some

moving

coil

(MC)

type

cartridges

possi¬

ble,

but,

other

low

output

moving

coil

cartridges

may

require

use

step-up

transformer

head

amplifier.

Use

this

control

give

the

volume

sound

that

you

require.

Always

start

with

turned

fully

the

left

(counter-clockwise)

the

"0"

position

before

turning

the

volume

level

you

re¬

quire

(clockwise).

the

indicator

light

when

the

MODE

switch

the

Auto

(

)

position,

signifies

that

the

tuner

operating

the

MODE.

When

tuned

powerful

local

station,

the

local

mode

takes

over.

(AM

iodlea^or)

This

indicator

comes

when

receiving

broadcast.

USTEREO

(Stereo

Indicator)

This

indicator

comes

automatically

when

stereo

broadcasting

received

and

goes

out

auto¬

matically

when

there

monaural

reception.

§BLEND

(

Blend

Indicator

)

This

indicator

comes

automatically

when

the

signal

you

receive

weak.

weak

reception

areas,

when

hissing

high

pitched

noise

makes

for

poor

stereo

reception,

the

blend

circuit

will

cut

cancel

the

high-range

noises.

operates

when

the

MODE

switch

AUTO

(

MJ.

®OTS(OTS

Indicator

)

the

OTS

indicator

light

when

the

Muting/OTS

switch

the

(

J8L)

position,

signifies

that

the

Optimum

Tuning

System

will

correct

any

slight

mis-tuning,

assure

optimum

reception

stations.

§PHONES

and

Jacke

Two

headphone

jacks

are

provided.

Plugging

into

the

jacks

does

not

cut-off

power

the

speakers,

necessary

use

the

off

position

the

speaker

selector

switch

you

not

want

the

speakers

function.

fSPEAKER

With

this

switch

you

can

select

either

both

two

sets

stereo

speaker

systems.

§LOCAL

(Local

Indicator)

lights

during

Local

(general)

reception.

When

the

Mode

Switch

Local

(

-**•),

however,

remains

lighted

regardless

distant

local

re¬

ception.

®LQW

and

NIOH

FILTERS

The

low

filter

gives

sharp

dB/octave

cut-off

below

25Hz.

The

high

filter

has

dB/octave

cut¬

off

slope

frequencies

above

kHz.

©LOUDWeSSB

Control

This

boosts

the

extreme

low

and

high

frequencies

compensate

for

our

ears

reduced

sensitivity

these

frequencies

low

volumes.

Set

the

FLAT

position

while

the

VOLUME

control

set

your

normal

maximum

listening

level.

Turning

counter-clockwise

will

reduce

the

volume

while

retaining

the

natural

balance

between

low

and

high

frequencies.

||BASS

and

TREBLE

Controls

The

bass

and

treble

controls

have

low

turnover

frequency

350

and

high

turnover

frequen¬

3.5

kHz

respectively.

the

flat

positions,

the

tone

control

circuits

frequency

response

completely

flat.

PHESEWCE

Control

This

control,

centered

about

kHz,

readily

adjusts

for

mid-range

characteristics.

iOALANCIE

Control

The

balance

knob

controls

the

difference

out¬

put

volume

between

the

and

{left

and

right)

stereo

channels.

Set

this

control

the

center

"Q"

position,

which

there

click

stop,

unless

you

need

correct

for

lack

balance

between

the

audio

level

the

two

channels,

correct

for

listening

position

which

not

equidistant

from

the

two

speakers.

The

balance

control

reduces

the

volume

from

the

left-hand

speaker

when

turned

clockwise,

and

reduces

that

from

the

right-hand

speaker

when

turned

counter-clockwise.

©IVSQDe

Switch

This

gives

the

choice

stereo

monaural

reproduction.

Note

that

the

mono

position

the

amplifier

section

will

reproduce

all

sounds

{includ¬

ing

stereo

programs,

etc.)

monaurally.

ADAPTOR

Bwi&ch

When

connecting

Graphic

Equalizer,

Dolby

Unit

any

other

audio

equipment

Adaptor

termi¬

nals,

set

the

ADAPTOR

switch

ON.

Make

sure

keep

OFF

when

not

used.

Leave

OFF

while

not

connecting

any

other

audio

equipment.

®IF

MODE

Bwifcoh

With

this

switch

Auto

{

Local

{general)

function

automatically

switches

{long

distance)

please

leave

the

switch

this

position

for

normal

use.

Switching

Local

(

position

compells

the

tuner

stay

the

Local

mode

regardless

remote

local

signal

reception.

SVB

UT1IMG

/OTS

Switch

When

this

switch

the

position,

the

Opti¬

mum

Tuning

System

{OTS)

will

minimize

the

effect

any

mis-tuning,

and

will

ensure

continued

optimum

reception

stations.

the

OFF

position,

accurate

manual

tuning

essential.

Even

the

position,

however,

OTS

automatically

switched

off

when

you

touch

the

tuning

knob,

permitting

manual

tuning.

The

muting

function

ensures

that

both

inter-station

noise

and

weak

signal

strength

stations

will

muted.

the

OFF

position

even

the

weakest

stations

will

heard.

TUNER

FM/AM

Switch

This

determines

whether

stations

will

received.

0TtJWII%Se

Knob

The

large

tuning

knob

gives

smooth

and

positive

station

selection,

with

precision

flywheel

mecha¬

nism.

ANOTHER

PIECE

TAPE

DECK-1

TAPE

DECK-2

GRAPHIC

EQUALIZER

AUDIO

EQUIPMENT

TURN

TAEILE

(with

Type

Cartrigde)

AfyT

75^

UNBAL

The

75£2

UNBAL

(unbalanced)

terminal

used

for

unbalanced

type

75£2

coaxial

cable.

(Refer

toPIO).

§Antenna

Connections

Detailed

instructions

and

reception

are

given

pages

12,

but

quick

check

CR-840

tuner

functions

can

carried

out

connecting

the

T-type

indoor

antenna

provided

with

the

CR-840

the

terminals

marked

300^2

BAL.

Attach

the

two

arms

the

"T",

fully

extended,

the

ceiling

walls

your

room.

The

quick

check

can

carried

out

with

the

selector

switches

vertical

and

all

push

button

switches

the

out

(

JIL)

positions,

except

for

the

speakers

selector

switch

(when

you

wish

hear

the

output

your

speakers

rather

than

using

headphones).

^SPEAKER

The

CR-840

can

handle

two

sets

speakers

and

B),

with

selection

either,

both,

neither,

use

the

Speakers

Selector

switch

the

front

panel.

Speakers

should

have

impedances

between

and

ohms,

but

when

the

two

speaker

sets

are

used

the

same

time,

connect

only

speakers

with

impedances

between

ohms

and

ohms.

Use

speakers

rated

take

the

full

watts

output

power,

set

the

volume

control

that

the

rated

maximum

speaker

input

power

not

exceeded.

Volume

level

should

reduced

immediately

whenever

there

increased

distortion

sense

strain

which

indicates

that

the

speakers

are

being

overloaded.

SPEAKER

CONNECTIONS

V-

Making

the

Speaker

Connections

trip

insulation

from

the

speaker

cable

and

twist

the

stray

ends

together.

possible

solder

the

ends.

Push

the

lever

beneath

the

terminal

shown

the

diagram,

and

aligning

the

inner

and

outer

terminal

holes.

Then

fully

insert

the

stripped

wire.

Release

the

lever,

and

the

wire

end

will

firmly

clamped.

Use

the

upper

(A)

terminals

first.

careful

that

the

terminals

identified

the

and

—

signs

above

them

are

connected

with

the

corresponding

and

—

terminals

the

speakers.

mistake

will

result

poor

bass

response

and

ill-defined

stereo

image.

Also

sure

connect

the

left-hand

speaker

the

speaker

terminals,

and

the

right-hand

the

terminals.

Repeat

this

with

the

terminals

other

speakers

are

connected.

ail

cases

make

sure

that

connections

are

fully

and

firmly

made,

you

may

not

able

get

any

sound

from

one

speakers.

®AC

OUTLETS

These

spare

Outlets

are

provided

for

your

convenience

connecting

other

items

audio

equipment.

Only

the

left

outlet

controlled

the

CR-840

power

switch.

This

has

maximum

power

rating

200

watts,

and

should

used

for

items

such

turntable

units.

not

connect

any

item

which

draws

than

200

watts.

The

other

outlets

are

not

affected

the

CR-840

power

switch,

and

any

items

connected

them

must

switched

and

off

their

own

power

switches.

Note

that

the

total

power

available

from

these

two

outlets

together

only

200

watts.

Use

them

for

such

items

your

tape

deck.

0C5IMD

(©round)

Terminal

The

ground

terminal

provided

for

grounding

turntable

units.

©INPUT

Terminals

These

are

the

terminals

which

are

selected

the

Input

Selector

switch

the

front

panel.

They

include

Phono

and

Aux

connections.

The

Aux

terminals

can

used

connect

external

tuner,

for

8-track

cartridge

tape

player,

etc.

§TAPE

and

RECOLJT

Terminals

Two

tape

decks

can

attached

these

input

and

output

terminals.

Recording

can

made

both

tape

decks

the

same

time,

any

source

connected

the

CR-840,

setting

the

Recout

selector

switch

the

front

panel

the

appropri¬

ate

position.

Tapes

can

dubbed

from

one

deck

the

other

either

direction,

and

recording

can

proceed

while

any

other

source

selected

the

Input

selector

being

auditioned.

@ADAPTOH

Terminals

When

connecting

Graphic

Equalizer,

Dolby

Unit

any

other

audio

equipment

the

Adaptor

terminals

connect

its

output

terminal

the

FROM

terminals

CR-840

and

its

input

terminal

the

terminals

the

CR-840.

©AC

Electrical

Power

(Lane

Plug

the

CR-840

power

cord

into

main

power

supply

wall

outlet

socket,

and

make

sure

the

line

not

likely

tripped

over.

The

T-type

antenna

provided

with

yourCR-840

adequate

only

high

signal

strength

areas

and

under

favorable

conditions.

other

cases,

external

multi-element

antenna

needed.

you

cannot

obtain

satisfactory

reception

with

the

T-type

antenna,

this

indication

that

you

need

external

antenna.

ensure

the

very

best

results,

motor-driven

antenna

assembly

with

remote

control

its

orientation

ideal,

but

the

CR-840

has

sufficient

sensitivity

operate

well

with

fixed

antenna.

The

external

antenna

should

perferably

located

fairly

the

CR-840,

and

mounted

high

conveniently

possible.

Try

various

antenna

orientations,

either

pointing

towards

the

weakest

station

you

intend

receive

away

from

the

major

source

interference

(preferably

both,

although

some

compromise

usually

necessary

most

locations).

the

antenna

intended

for

use

with

shielded

coaxial

cable

(which

reduces

losses

and

interference)

use

the

7512

UNBAL

terminals

the

rear

panel

the

CR-840,

and

connect

the

cable

shown.

Antennas

intended

for

use

with

the

30012

BAL

terminals

the

rear

panel

(which

use

feeder

wire

similar

that

the

internal

antenna

provided)

can

also

used

with

coaxial

cable

matching

transformer

attached

the

antenna.

The

use

coaxial

cable

advisable

where

the

antenna

must

located

some

distance

from

the

CR-840,

where

interference

from

automobile

ignition,

etc.,

troublesome.

Attaching

the

coaxial

cable

the

accessory

plug

(21

Net

wire

holder

(

)

Plug

section

Inserting

the

core

(1)

Remove

the

outer

cover¬

ing

the

coaxial

cable

about

from

its

tip,

and

then

slip

the

plug

fastener

over

the

coaxial

cable.

(2)

Insert

the

coaxial

cable

core

into

the

hole

special¬

prepared

for

the

core

the

plug.

Insert

the

net

wire

holder.

(3)

Finally,

screw

the

plug

fastener.

Fig.

BROADCAST

RECEPTION

Set

the

INPUT

SELECTOR

TUNER.

Set

the

TUNER

push-button

FM.

Check

that

the

indicator

LEDs

light

the

right-hand

side

the

dial.

All

switches

and

knobs

should

shown

the

front-panel

diagram.

Tune

for

maximum

signal

strength

the

SIGNAL

QUALITY

meter,

ignoring

any

oscilla¬

tions

the

indicating

pointer

position.

Now

tune

bring

the

TUNING

meter

pointer

its

exact

center.

This

the

optimum

tuning

position:

set

carefully.

Check

that

the

stereo

indicating

LED

lights

you

intend

listening

stereo

rather

than

monaural

broadcast.

When

connecting

the

coaxial

cable

the

75£2

UNBAL

connector

which

located

the

rear

panel

the

CR-840,

first

attach

the

cable

the

accessory

plug

shown

the

figure,

and

then

connect.

Andere Handbücher für CR-840

Inhaltsverzeichnis

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