Marantz SUPERSCOPE CRS-2104 Manuel utilisateur

SUPERSCOPE

3c.

curswonre

BREmen

Been

iiz.©

CALIFORNIA

91311-U.S.A.

CRS-2104

TABLE

CONTENTS

SPECIFICATIONS

FEATURES

DISASSEMBLY

10.

2.1

Removing

the

Cassette

Compartment

Lid

2.2

Removing

the

Back

Cover

2.3.

Removing

the

Chassis

2.4

Removing

the

Mechanical

Assembly

SERVICE

GUIDE

3.1

Battery

Voltage

3.2

Battery

Polarity

3.3.

Cleaning

the

Heads

3.4

Current

Consumption

3.5

Voltage

Conversion

DIAL

STRINGING

MECHANICAL

ADJUSTMENTS

5.1.

Checking

the

Play

Operation

5.2

Adjusting

the

Pause

Timing

5.3

Adjusting

the

Fast

Forward

and

Rewind

Torque

5.4

Adjusting

the

Pinch

Roller

Pressure

5.5

Adjusting

the

Play

Torque

5.6

Adjusting

the

Flywheel

Thrust

5.7

Positioning

the

Motor

Pulley

5.8

Adjusting

the

Tape

Speed

ELECTRICAL

ADJUSTINGS

AND

MEASUREMENTS

6.1

Adjusting

the

Playback

Level

6.2

Adjusting

the

Head

Azimuth

6.3

Adjusting

the

Bias

Current

6.4

Measuring

the

Signal-to-Noise

Ratio

(in

Playback

Mode)

6.5

Measuring

the

Playback

Frequency

Response

6.6

Measuring

the

Combined

Recording

and

Playback

Frequency

Response

6.7.

Measuring

the

Combined

Recording

and

Playback

Level

6.8

Measuring

the

Combined

Recording

and

Playback

Distortion

6.9

Measuring

the

Combined

Recording

and

Playback

Signal-to-Noise

Ratio

6.10

Measuring

the

Erasing

Level

6.11

Calibrating

the

Meter

ALIGNMENT

PROCEDURES

7.1

Alignment

Procedure

7.2

Stereo

Separation

Alignment

Procedure

7.3.

Alignment

Procedure

7.4

Alignment

Procedure

7.5

Alignment

Procedure

DIAGRAMS

8.1

Level

Diagrams

8.2.

Block

Diagram

8.3.

Schematic

Diagram

8.4

Circuit

Board

Diagram

MAJOR

COMPONENT

LOCATIONS

9.1

Cabinet

Front

View

9.2

Chassis

Top

View

EXPLODED

VIEWS

AND

PARTS

LIST

10.1

{C01-99]

Front

Case

10.2

[(C02-99]

Rear

Lid

and

Upper

Case

10.3

[M01-99]

P.W.

Boards

and

General

Parts

10.4

[P01-99]

Operation

Levers

and

Buttons

10.5

[P02-99]

Head

Chassis

MHOooanrpPA

AHL

PWWWWHN

DONNN

10.6

[P03-99]

Flywheel

10.7

[P04-99]

Parts

Assembled

the

Top

the

Chassis

10.8

[PO5-99]

Parts

Assembled

the

Reverse

the

Chassis

10.9

[HO1-99]

Packing

Materials

10.10

Electrical

Parts

List

CRS-2104

SPECIFICATIONS

GENERAL:

DIMENSIONS

(Wx

D).

.15-7/16

9-3/16

4-15/16

in.

(39.2

23.3

12.5

cm)

Ibs.,

oz.

(4.2

kg)

110/220

AC,

Hz,

Six

‘‘D’”’

Size

Batteries

External

WEIGHT

(with

batteries)

POWER

REQUIREMENT

NUMBER

SEMICONDUCTORS:

Integrated

Circuits

Field

Effect

Transistors

Light

Emitting

Diodes

TERMINALS:

Microphone

Plug

Type:

Mini

Input

Sensitivity:

0.25

(—72

dB)

tmpedance:

4.5

Plug

Type:

Mini

Input

Sensitivity:

(—25

dB)

Impedance:

Plug

Type:

DIN

Input

Sensitivity:

Impedance:

kQ2

Plug

Type:

DIN

Output

Level:

0.5

(-6

dBV)

Output

Impedance:

2.5

Plug

Type:

Mini

Output

Power:

2.2

(42)

External

Antennax1....

Input

Impedance:

Stereo

Headphone

Plug

Type:

Phone

Impedance:

External

Input

DIN

Input

DIN

Output

External

Speaker

Inlet

DC9Vx1

Remote

Control

TAPE

RECORDER

SECTION:

Philips

Type

Cassette

Tape

4-Track

Stereo

Bias

Erase

110

Seconds

(C-60)

125

kHz

(—5

dB)

ERASING

SYSTEM

REW/FF

TIME

FREQUENCY

RESPONSE

SIGNAL-TO-NOISE

RATIO

TAPE

SPEED

1-7/8

ips

(4.8

cm/sec)

+3%

Less

than

0.2%

rms

TUNER

SECTION:

CIRCUIT

SYSTEM

4-Band

FM/MW/SW/LW

Superheterodyne

FM:

108

MHz

MW:

525

1605

kHz

SW:

MHz

LW:

150

370

kHz

FM:

10.7

MHz

MW/SW/LW:

455

kHz

FM/SW:

Telescopic

Rod

MW/LW:

Ferrite-rod

FM:

(30

S/N)

MW:

600

uV/m

(20

S/N)

SW:

150

nV/m

(20

S/N)

LW:

900

nV/m

(20

S/N)

SIGNAL-TO-NOISE

RATIO...

FM:

(Input

mV}

MW/SW/LW:

(Input

mV/m)

STEREO

SEPARATION

(Input

mV)

INTERMEDIATE

FREQUENCY

ANTENNA

CRS-2104

FEATURES

(1)

Full

Circuits

Construction

Audio

full-line

three-IC

stages

Each

audio

channel

consists

three

!Cs:

equalizer

amplifier

having

ALC,

line

amplifier,

and

power

ampli-

fier.

The

power

amplifier

made

SEPP

circuit

that

assures

2.2

output

power

per

channel

with

source.

The

audio

full-line

illustrated

below.

LINE

POWER

SPK

Quadrature-detection

AM/FM

and

The

quadrature

detection,

which

the

same

that

usual

hi-fi

tuners,

provides

quality

tone

with

little

distor-

tion.

The

single

hump

tuning

and

S-curve

alignment

can

accomplished

adjusting

two

points

only,

which

points

the

circuit

are

reduced.

Low-voltage,

PLL

multiplex

stereo

The

present

PLL

(phase-locked

loop)

multiplex

can

run

power

voltage

low

for

the

first

time

the

source

voltage

for

the

tuner

decreased

through

ripple

filter,

while

ICs

requires

12-V

power

source

for

good

channel

separation,

for

stable,

wide

sound

field.

Alignment

can

accomplished

very

easily

adjusting

two

semifixed

controls

only

com-

pared

with

inductor

adjustment

circuit.

(2)

Large-Sized,

Speaker

System

The

speaker,

the

12-cm

diameter

which

best

this

class

tape

recorder,

produces

lush,

comfortable,

dy-

namic

sound.

(3)

Large-Sized

Tripple

Meter

The

easy-to-read,

large-sized

meter

indicates

battery

voltage

the

tape

playback

operation,

tuning

state

radio

program

reception,

any

recording

operation.

(4)

Matrix

Stereo

System

The

main

signal

mixed

with

the

out-of-phase

signal

which

taken

from

the

other

channel

and

passed

through

filter

having

certain

bandwidth.

This

makes

the

reproduced

sound

far

deeper

and

wider

than

usual,

thus

providing

rather

high

stareophonic

effect.

(5)

Powerful

Output

The

output

power

high

4.4

watts,

2.2

watts

for

each

channel

4-Q

load.

(6)

Variable

Sound

Monitor

recording

radio

program,

the

sound

volume

and

tone

can

freely

changed

without

affecting

the

record-

ing

level.

(7)

Total

Shut-off

Mechanism

The

tape

automatically

stopped

the

end

the

play-

back,

fast

forward,

even

recording

mode

operation.

(8)

Cue

and

Review

Mechanisms

(9)

One-Touch

Recording

System

Recording

can

made

pressing

the

REC

button

only.

(10)

Large-Sized

Chassis

The

large-sized

chassis

facilitates

easy

adjustment

any

point

when

the

casing

removed.

The

number

screws

are

minimized

and

the

power

transformer,

external

jacks,

meter,

and

similar

devices

are

fit-assembled

that

main-

tenance

and

service

are

very

easy.

CRS-2104

DISASSEMBLY

2.1

REMOVING

THE

CASSETTE

COMPARTMENT

LID

2.3

REMOVING

THE

CHASSIS

While

pressing

the

point

and

the

arrow

direction,

Remove

the

five

knobs

through

pull

the

lid

toward

shown.

The

lid

will

removed.

Remove

the

five

screws

through

The

top

escutcheon

(F)

will

removed.

Remove

the

two

condenser

microphones

(G)

from

the

front

side

opening

the

stoppers

toward

the

arrow

direction.

Then

the

chassis

will

removed.

NOTE:

The

knobs

the

FUNCTION,

MODE,

and

AFC

switches

should

replaced

after

putting

the

inside

white

kips

the

switch

schafts.

2.2

REMOVING

THE

BACK

COVER

Open

the

battery

compartment

cover

depressing

Disconnect

the

antenna

lead

connector

and

the

finger

grip

and

pulling

down.

Remove

the

seven

back

cover

will

come

off

the

casing.

screws

through

CRS-2104

2.4

REMOVING

THE

MECHANICAL

ASSEMBLY

Remove

the

four

screws

through

Disconnect

the

lead

connector

from:

REC/PLAY

HEAD,

ERASE

HEAD,

MOTOR

SWITCH,

MOTOR

SERVICE

GUIDE

3.1

BATTERY

VOLTAGE

Many

customers

often

determine

that

the

set

faulty

when

malfunctioning

they

are

not

aware

used-up

battery.

Before

operation,

therefore,

make

certain

that

the

battery

voltage

higher

than

4.5

3.2

BATTERY

POLARITY

the

battery,

particular

care

should

taken

its

polarity

wrong

placing

may

damage

transistors

and

motor.

3.3

CLEANING

THE

HEADS

The

head

slit

contaminated

with

tape

chips

and

powder,

rubber,

dust,

dirt

leads

insufficient

sound

volume

and

tone

deterioration.

Wipe

such

contaminants

off

the

slit

using

soft

cloth

moistened

with

alcohol

carbon

tetrachloride.

3.4

CURRENT

CONSUMPTION

VOLUME

Maximum

Minimum

Maximum

(rem

oon

Minimum

_—__+—_—

*Units

mA.

The

above

values

may

differ

slightly

depending

individual

sets.

Measuring

conditions

(standard

inputs)

Radio

AM:

mV,

400

Hz,

30%

mod.

FM:

mV,

400

Hz,

30%

mod.

Tape

Recorder

Recording:

mV,

kHz

mic

input

Playback:

Test

tape

MTT

112

(333

Hz,

250

nwb/m)

3.5

VOLTAGE

CONVERSION

This

unit

may

converted

110

operation

the

Voltage

Selector

Switch

(S002)

Located

within

the

Bat-

tery

Compartment.

CRS-2104

DIAL

STRINGING

CRS-2104

MECHANICAL

ADJUSTMENTS

PRECAUTIONS:

Prior

any

adjustments,

clean

the

head

slits

with

soft

cloth

cotton

swab

moistened

with

denatured

alcohol

carbon

tetrachloride,

and

fully

demagnetize

the

head,

capstan

and

similar

parts.

5.1

CHECKING

THE

PLAY

OPERATION

5.1.1

CHECKING

THE

PLAY

TIMING

normal

that

when

the

PLAY

pushbutton

depress-

ed,

the

take-up

reel

table

turns

first,

then

the

pinch

rol-

ler

rotated.

The

reel

table

and

pinch

roller

must

not

start

turning

the

same

time.

NOTE:

Make

certain

that

such

subsequent

operation

mode

irrespective

locking

state

depressed

slowly

without

the

tape.

Slowly

depress

the

PLAY

pushbutton,

and

the

take-up

reel

table

will

start

turning.

that

time,

check

make

certain

that

clearance

between

the

pinch

roller

and

capstan

less

than

0.5

mm.

5.2

ADJUSTING

THE

PAUSE

TIMING

Set

the

recorder

the

playback

mode.

Depress

the

PAUSE

pushbutton

slowly,

and

the

take-up

reel

will

pause.

that

time,

check

ensure

that

clearance

be-

tween

the

pinch

roller

and

ranges

from

0.2

0.5

mm.

out

the

range,

adjust

bending

angle

the

pinch

roller

bracket

arm

(part

A).

NOTE:

increase

clearance

between

the

pinch

roller

and

capstan,

decrease

the

angle

(in

the

direction

C).

de-

crease

the

clearance,

increase

the

angle

(in

the

direction

B).

5.3

ADJUSTING

THE

FAST

FORWARD

AND

REWIND

TORQUE

Set

the

extended

parts

the

figure)

the

torque

adjustment

leaf

spring

the

figure)

the

FF/REW

idler

any

one

three

stepping

parts

the

idler.

NOTE:

increase

torque,

set

the

extended

parts

the

step-

ping

part

“INCREASE”

and

decrease

it,

set

those

the

stepping

part

‘‘DECREASE”.

Adjusting

range:

110

g-cm

5.1.2

ADJUSTING

THE

PLAY

TIMING

out

specification,

bend

the

part

the

pinch

roller

bracket

which

faces

the

head

chassis

stopper.

the

figure

shown,

bend

the

part

the

direction

de-

crease

the

clearance.

increase

the

clearance,

bend

the

part

the

direction

0.2~0,5mm

CAPSTAN

SHAFT

PINCH

ROLLER

HEAD

CHASSIS

STOPPER

NOTE:

After

adjustment,

check

sure

that

the

pinch

roller

bracket

does

not

contact

the

head

chassis

stopper

PLAY

mode.

INCREASE

DECREASE

ret

WII

5.4

ADJUSTING

THE

PINCH

ROLLER

PRESSURE

Measure

the

pressure

the

pinch

roller

using

gauge

shown.

For

measurement,

draw

the

pinch

roller

the

arrow

direction

which

detached

from

the

capstan

shaft

and

gradually

return

toward

the

capstan.

Read

the

gauge

the

time

when

the

pinch

roller

starts

turning.

The

standard

pressure

300+50

the

pressure

out

the

range,

bend

the

pinch

roller

spring

aroung

the

point

the

direction

5.5

ADJUSTING

THE

PLAY

TORQUE

Mount

the

extended

parts

(two)

the

disc

leaf

spring

any

one

the

stepping

parts

the

idler.

Adjusting

range:

g.cm

NOTES:

(1)

increase

torque,

mount

the

extended

parts

“INCREASE”

and

decrease

torque,

mount

them

“DECREASE”.

(2)

Check

the

take-up

clutch

for

slipping.

When

the

reel

base

paused,

the

wheel

must

smoothly

rotate.

The

wheel,

when

irregularly

rotating

stopping,

not

ac-

ceptable.

5.6

ADJUSTING

THE

FLYWHEEL

THRUST

Adjust

the

thrust

screw

the

flywheel

bracket

until

the

clearance

between

the

capstan

tail

end

and

thrust

bear-

ing

0.1

0.3

shown,

using

phillips

screw

driver.

For

adjusting,

feel

axial

dropping

the

fly-

wheel

for

proper

clearance

this

cannot

been

seen

through.

Then

paint

the

screw

lock.

————

CRS-2104

NOTE:

make

the

pressure

strong,

bend

the

direction

make

the

pressure

weak,

bend

the

direction

INCREASE

DECREASE

P222~7

rsa

ADJUSTING

SCREW

CRS-2104

ELECTRICAL

ADJUSTMENTS

5.7,

POSITIONING

THE

MOTOR

PULLEY

AND

MEASUREMENTS

Check

ensure

that

clearance

between

the

motor

and

pulley

3.1

mm.

out

specification,

reposition

Precaution

for

Adjustment

and

Measurement

the

pulley

shown.

Whenever

adjusting

measuring

any

circuit,

wipe

the

heads

clean

with

soft

cloth

moistened

with

alcohol

carbon

tetrachloride.

Also

sure

demagnetize

the

heads,

capstan,

and

similar

parts.

The

voltage

any

electrical

point

may

vary

with

the

input

signal,

make

measurements

voltage

under

signal

condition.

Transistors

are

affected

microvoltage.

Whenever

measuring

them,

use

aVTVM

having

high

internal

resistance

and

high

input

sensitivity

enough

elimi-

nate

errors

measurement.

adjustment

measurement,

set

the

TONE

control

its

mechanical

center

(‘‘0’)

unless

otherwise

spec-

ified.

For

measurements

outputs,

connect

pure

re-

sistor

across

the

external

speaker

terminal

and

use

VTVM.

Unless

otherwise

specified,

adjust

the

VOLUME

control

for

the

standard

output

level,

(0.45

V/4

QQ).

5.8

ADJUSTING

THE

TAPE

SPEED

Play

the

kHz

test

tape

back,

and

check

make

sure

that

the

meter

pointer

measuring

instrument

(fre-

quency

counter)

indicates

3000

+2.5%

less

spec-

ified.

out

the

range,

adjust

the

semifixed

re-

sistor

inside

the

motor.

After

adjustment,

sure to

stick

seal

the

hole

for

the

resistor.

6.1

ADJUSTING

THE

PLAYBACK

LEVEL

Play

the

333

level

adjusting

tape

MTT

112

back

and

inspect

the

and

channel

output

voltages

the

EXT

jack.

Adjust

R804

until

the

output

voltage

the

channel

coincides

with

that

the

channel.

The

out-

put

voltage

EXT

jack

will

around

0.45

py)

are

PLAYBACK

LEVEL.”

C803

0.02/50V

R806

50k

(D)

R803

2.7

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