Marantz Superscope crs-2104 User manual

SUPERSCOPE

..

3c.

curswonre

BY

BREmen

Been

me

iiz.©

CALIFORNIA

91311-U.S.A.

CRS-2104

TABLE

OF

CONTENTS

SPECIFICATIONS

1.

FEATURES

2.

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

VU

Meter

.

ALIGNMENT

PROCEDURES

7.1

FM

Alignment

Procedure

7.2

FM

Stereo

Separation

Alignment

Procedure

7.3.

MW

Alignment

Procedure

7.4

LW

Alignment

Procedure

7.5

SW

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

DD

oO

0

©

o

10

11

12

13

14

15

17

19

21

22

23

24

25

10.6

[P03-99]

Flywheel

10.7

[P04-99]

Parts

Assembled

on

the

Top

of

the

Chassis

10.8

[PO5-99]

Parts

Assembled

on

the

Reverse

of

the

Chassis

10.9

[HO1-99]

Packing

Materials

10.10

Electrical

Parts

List

26

27

28

29

CRS-2104

SPECIFICATIONS

GENERAL:

DIMENSIONS

(Wx

Hx

D).

.

.15-7/16

x

9-3/16

x

4-15/16

in.

(39.2

x

23.3

x

12.5

cm)

9

Ibs.,

4

oz.

(4.2

kg)

110/220

V

AC,

50

Hz,

18

W

Six

‘‘D’”’

Size

Batteries

External

9

V

DC

WEIGHT

(with

batteries)

POWER

REQUIREMENT

..

NUMBER

OF

SEMICONDUCTORS:

Integrated

Circuits

Field

Effect

Transistors

Light

Emitting

Diodes

TERMINALS:

Microphone

x

2

Plug

Type:

Mini

Input

Sensitivity:

0.25

mV

(—72

dB)

tmpedance:

4.5

kQ

Plug

Type:

Mini

Input

Sensitivity:

55

mV

(—25

dB)

Impedance:

60

kQ

Plug

Type:

DIN

Input

Sensitivity:

20

mV

Impedance:

40

kQ2

Plug

Type:

DIN

Output

Level:

0.5

V

(-6

dBV)

Output

Impedance:

2.5

kQ

Plug

Type:

Mini

Output

Power:

2.2

W

x

2

(42)

DC

External

FM

Antennax1....

Input

Impedance:

75

2

Stereo

Headphone

x

1

Plug

Type:

Phone

Impedance:

8

Q

External

Input

x

2

DIN

Input

DIN

Output

External

Speaker

x

2

AC

Inlet

x

1

DC9Vx1

Remote

Control

x

1

TAPE

RECORDER

SECTION:

Philips

Type

Cassette

Tape

4-Track

Stereo

AC

Bias

AC

Erase

110

Seconds

(C-60)

.

125

Hz

to

8

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:

88

to

108

MHz

MW:

525

to

1605

kHz

SW:

6

to

18

MHz

LW:

150

to

370

kHz

FM:

10.7

MHz

MW/SW/LW:

455

kHz

FM/SW:

Telescopic

Rod

MW/LW:

Ferrite-rod

FM:

6

uV

(30

dB

S/N)

MW:

600

uV/m

(20

dB

S/N)

SW:

150

nV/m

(20

dB

S/N)

LW:

900

nV/m

(20

dB

S/N)

SIGNAL-TO-NOISE

RATIO...

FM:

45

dB

(Input

1

mV}

MW/SW/LW:

40

dB

(Input

5

mV/m)

FM

STEREO

SEPARATION

25

dB

(Input

1

mV)

INTERMEDIATE

FREQUENCY

ANTENNA

CRS-2104

1.

FEATURES

(1)

Full

IC

Circuits

Construction

@

Audio

full-line

three-IC

stages

Each

audio

channel

consists

of

three

!Cs:

an

equalizer

amplifier

having

ALC,

a

line

amplifier,

and

power

ampli-

fier.

The

power

amplifier

IC

is

made

up

of

SEPP

circuit

that

assures

2.2

W

output

power

per

channel

with

9

V

source.

The

audio

full-line

is

illustrated

below.

EQ

LINE

POWER

SPK

@

Quadrature-detection

AM/FM

and

IF

IC

The

quadrature

detection,

which

is

the

same

as

that

of

usual

hi-fi

tuners,

provides

quality

tone

with

little

distor-

tion.

The

single

hump

tuning

and

S-curve

alignment

can

be

accomplished

by

adjusting

two

points

only,

to

which

5

or

more

points

in

the

are

reduced.

@

Low-voltage,

PLL

multiplex

FM

stereo

IC

The

present

PLL

(phase-locked

loop)

multiplex

IC

can

be

run

by

power

voltage

as

low

as

6

V

for

the

first

time

as

the

source

voltage

for

the

tuner

is

decreased

to

6

V

through

a

ripple

filter,

while

requires

12-V

power

source

for

good

channel

separation,

for

stable,

wide

sound

field.

Alignment

can

be

accomplished

very

easily

by

adjusting

two

semifixed

controls

only

as

com-

pared

with

inductor

adjustment

in

(2)

Large-Sized,

Speaker

System

The

speaker,

the

12-cm

diameter

of

which

is

best

in

this

class

of

tape

recorder,

produces

lush,

comfortable,

dy-

namic

sound.

(3)

Large-Sized

Tripple

Meter

The

easy-to-read,

large-sized

meter

indicates

a

battery

voltage

in

the

tape

playback

operation,

a

tuning

state

in

a

radio

program

reception,

or

a

VU

in

any

recording

operation.

(4)

Matrix

Stereo

System

The

main

signal

is

mixed

with

the

out-of-phase

signal

which

is

taken

from

the

other

channel

and

passed

through

a

filter

having

a

certain

bandwidth.

This

makes

the

reproduced

sound

by

far

deeper

and

wider

than

usual,

thus

providing

rather

high

stareophonic

effect.

(5)

Powerful

Output

The

output

power

is

as

high

as

4.4

watts,

2.2

watts

for

each

channel

at

4-Q

load.

(6)

Variable

Sound

Monitor

In

recording

a

radio

program,

the

sound

volume

and

tone

can

be

freely

changed

without

affecting

the

record-

ing

level.

(7)

Total

Shut-off

Mechanism

The

tape

is

automatically

stopped

at

the

end

in

the

play-

back,

fast

forward,

or

even

recording

mode

of

operation.

(8)

Cue

and

Review

Mechanisms

(9)

One-Touch

Recording

System

Recording

can

be

made

by

pressing

the

REC

button

only.

(10)

Large-Sized

Chassis

The

large-sized

chassis

facilitates

easy

adjustment

at

any

point

when

the

casing

is

removed.

The

number

of

screws

are

minimized

and

the

power

transformer,

external

jacks,

meter,

and

similar

devices

are

fit-assembled

so

that

main-

tenance

and

service

are

very

easy.

CRS-2104

2.

DISASSEMBLY

2.1

REMOVING

THE

CASSETTE

COMPARTMENT

LID

2.3

REMOVING

THE

CHASSIS

While

pressing

the

point

A

and

B

in

the

arrow

direction,

1.

Remove

the

five

knobs

A

through

E.

pull

the

lid

toward

as

shown.

The

lid

will

be

removed.

.

Remove

the

five

screws

1

through

5.

.

The

top

escutcheon

(F)

will

be

removed.

.

Remove

the

two

condenser

microphones

(G)

from

the

front

side

by

opening

the

stoppers

toward

the

arrow

direction.

.

Then

the

chassis

will

be

removed.

NOTE:

The

knobs

of

the

FUNCTION,

MODE,

and

AFC

switches

should

be

replaced

after

putting

the

inside

white

kips

on

the

switch

schafts.

2.2

REMOVING

THE

BACK

COVER

1.

Open

the

battery

compartment

cover

by

depressing

2.

Disconnect

the

antenna

lead

connector

A,

and

the

finger

grip

and

pulling

down.

Remove

the

seven

back

cover

will

come

off

the

casing.

screws

1

through

7.

CRS-2104

2.4

REMOVING

THE

MECHANICAL

ASSEMBLY

1.

Remove

the

four

screws

1

through

4.

2.

Disconnect

the

lead

connector

from:

a)

REC/PLAY

HEAD,

b)

ERASE

HEAD,

c)

MOTOR

SWITCH,

d)

MOTOR

3.

SERVICE

GUIDE

3.1

BATTERY

VOLTAGE

Many

customers

often

determine

that

the

set

is

faulty

when

malfunctioning

as

they

are

not

aware

of

used-up

battery.

Before

operation,

therefore,

make

certain

that

the

battery

voltage

is

higher

than

4.5

V.

3.2

BATTERY

POLARITY

In

loading

the

battery,

particular

care

should

be

taken

in

its

polarity

as

wrong

placing

may

damage

transistors

and

motor.

3.3

CLEANING

THE

HEADS

The

head

slit

contaminated

with

tape

chips

and

powder,

rubber,

dust,

or

dirt

leads

to

insufficient

sound

volume

and

tone

deterioration.

Wipe

such

contaminants

off

the

slit

using

soft

cloth

moistened

with

alcohol

or

carbon

tetrachloride.

3.4

CURRENT

CONSUMPTION

VOLUME

Maximum

|

Minimum

Maximum

(rem

oon

Minimum

_—__+—_—

*Units

in

mA.

The

above

values

may

differ

slightly

depending

on

individual

sets.

Measuring

conditions

(standard

inputs)

Radio

AM:

5

mV,

400

Hz,

30%

mod.

FM:

1

mV,

400

Hz,

30%

mod.

Tape

Recorder

Recording:

1

mV,

1

kHz

at

mic

input

Playback:

Test

tape

MTT

112

(333

Hz,

250

nwb/m)

3.5

VOLTAGE

CONVERSION

This

unit

may

be

converted

to

110

V

operation

by

the

Voltage

Selector

Switch

(S002)

Located

within

the

Bat-

tery

Compartment.

CRS-2104

4.

DIAL

STRINGING

CRS-2104

5.

MECHANICAL

ADJUSTMENTS

PRECAUTIONS:

Prior

to

any

adjustments,

clean

the

head

slits

with

soft

cloth

or

cotton

swab

moistened

with

denatured

alcohol

or

carbon

tetrachloride,

and

fully

demagnetize

the

head,

capstan

and

similar

parts.

5.1

CHECKING

THE

PLAY

OPERATION

5.1.1

CHECKING

THE

PLAY

TIMING

It

is

normal

that

when

the

PLAY

pushbutton

is

depress-

ed,

the

take-up

reel

table

turns

first,

then

the

pinch

rol-

ler

is

rotated.

The

reel

table

and

pinch

roller

must

not

start

turning

at

the

same

time.

NOTE:

Make

certain

that

such

a

subsequent

operation

is

mode

irrespective

of

locking

state

is

depressed

slowly

without

loading

the

tape.

Slowly

depress

the

PLAY

pushbutton,

and

the

take-up

reel

table

will

start

turning.

At

that

time,

check

to

make

certain

that

a

clearance

between

the

pinch

roller

and

capstan

is

less

than

0.5

mm.

5.2

ADJUSTING

THE

PAUSE

TIMING

Set

the

recorder

in

the

playback

mode.

Depress

the

PAUSE

pushbutton

slowly,

and

the

take-up

reel

will

pause.

As

that

time,

check

to

ensure

that

a

clearance

be-

tween

the

pinch

roller

and

ranges

from

0.2

to

0.5

mm.

If

out

of

the

range,

adjust

a

bending

angle

of

the

pinch

roller

bracket

arm

(part

A).

NOTE:

To

increase

a

clearance

between

the

pinch

roller

and

capstan,

decrease

the

angle

(in

the

direction

C).

To

de-

crease

the

clearance,

increase

the

angle

(in

the

direction

B).

5.3

ADJUSTING

THE

FAST

FORWARD

AND

REWIND

TORQUE

Set

the

extended

parts

(B

in

the

figure)

of

the

torque

adjustment

leaf

spring

(A

in

the

figure)

of

the

FF/REW

idler

on

any

one

of

three

stepping

parts

of

the

idler.

NOTE:

To

increase

torque,

set

the

extended

parts

to

the

step-

ping

part

of

“INCREASE”

and

to

decrease

it,

set

those

to

the

stepping

part

of

‘‘DECREASE”.

Adjusting

range:

70

to

110

g-cm

5.1.2

ADJUSTING

THE

PLAY

TIMING

If

out

of

specification,

bend

the

part

of

the

pinch

roller

bracket

which

faces

the

head

chassis

stopper.

In

the

figure

shown,

bend

the

part

in

the

direction

of

A

to

de-

crease

the

clearance.

To

increase

the

clearance,

bend

the

part

in

the

direction

of

B.

0.2~0,5mm

t

CAPSTAN

SHAFT

PINCH

ROLLER

*

HEAD

CHASSIS

STOPPER

NOTE:

After

adjustment,

check

to

be

sure

that

the

pinch

roller

bracket

does

not

contact

the

head

chassis

stopper

in

PLAY

mode.

INCREASE

DECREASE

A

ret

WII

5.4

ADJUSTING

THE

PINCH

ROLLER

PRESSURE

Measure

the

pressure

of

the

pinch

roller

using

a

gauge

as

shown.

For

measurement,

draw

the

pinch

roller

in

the

arrow

direction

in

which

it

is

detached

from

the

capstan

shaft

and

gradually

return

it

toward

the

capstan.

Read

the

gauge

at

the

time

when

the

pinch

roller

starts

turning.

The

standard

pressure

is

300+50

g.

If

the

pressure

is

out

of

the

range,

bend

the

pinch

roller

spring

aroung

the

point

A

in

the

direction

B

or

C.

5.5

ADJUSTING

THE

PLAY

TORQUE

Mount

the

extended

parts

A

(two)

of

the

disc

leaf

spring

on

any

one

of

the

stepping

parts

of

the

idler.

Adjusting

range:

40

to

70

g.cm

NOTES:

(1)

To

increase

torque,

mount

the

extended

parts

on

“INCREASE”

and

to

decrease

torque,

mount

them

on

“DECREASE”.

(2)

Check

the

take-up

clutch

for

slipping.

When

the

reel

base

is

paused,

the

wheel

must

smoothly

rotate.

The

wheel,

when

irregularly

rotating

or

stopping,

is

not

ac-

ceptable.

5.6

ADJUSTING

THE

FLYWHEEL

THRUST

Adjust

the

thrust

screw

at

the

flywheel

bracket

until

the

clearance

between

the

capstan

tail

end

and

thrust

bear-

ing

is

0.1

to

0.3

mm

as

shown,

using

a

phillips

screw

driver.

For

adjusting,

feel

of

axial

dropping

of

the

fly-

wheel

for

proper

clearance

as

this

cannot

been

seen

through.

Then

paint

the

screw

to

lock.

4

————

a

|

eT

Y

CRS-2104

NOTE:

To

make

the

pressure

strong,

bend

in

the

direction

B.

To

make

the

pressure

weak,

bend

in

the

direction

C.

INCREASE

DECREASE

et

P222~7

rsa

ADJUSTING

SCREW

CRS-2104

6.

ELECTRICAL

ADJUSTMENTS

5.7,

POSITIONING

THE

MOTOR

PULLEY

AND

MEASUREMENTS

Check

to

ensure

that

a

clearance

between

the

DC

motor

and

pulley

is

3.1

mm.

!f

out

of

specification,

reposition

Precaution

for

Adjustment

and

Measurement

the

pulley

as

shown.

1.

Whenever

adjusting

or

measuring

any

circuit,

wipe

the

heads

clean

with

a

soft

cloth

moistened

with

alcohol

or

carbon

tetrachloride.

Also

be

sure

to

demagnetize

the

heads,

capstan,

and

similar

parts.

2.

The

voltage

at

any

electrical

point

may

vary

with

the

input

signal,

so

make

measurements

of

voltage

under

no

signal

condition.

3.

Transistors

are

affected

by

microvoltage.

Whenever

measuring

on

them,

use

aVTVM

having

a

high

internal

resistance

and

high

input

sensitivity

enough

to

elimi-

nate

errors

in

measurement.

4.

In

adjustment

or

measurement,

set

the

TONE

control

to

its

mechanical

center

(‘‘0’)

unless

otherwise

spec-

ified.

5.

For

measurements

of

outputs,

connect

a

pure

4

22

re-

sistor

across

the

external

speaker

terminal

and

use

a

VTVM.

Unless

otherwise

specified,

adjust

the

VOLUME

control

for

the

standard

output

level,

50

mW

(0.45

V/4

QQ).

5.8

ADJUSTING

THE

TAPE

SPEED

Play

the

3

kHz

test

tape

back,

and

check

to

make

sure

that

the

meter

pointer

of

a

measuring

instrument

(fre-

quency

counter)

indicates

3000

Hz

+2.5%

or

less

as

spec-

ified.

If

it

is

out

of

the

range,

adjust

the

semifixed

re-

sistor

inside

the

motor.

After

adjustment,

be

sure to

stick

seal

on

the

hole

for

the

resistor.

6.1

ADJUSTING

THE

PLAYBACK

LEVEL

Play

the

333

Hz

level

adjusting

tape

MTT

112

back

and

inspect

the

R

and

L

channel

output

voltages

at

the

EXT

SP

4

Q

jack.

Adjust

R804

until

the

output

voltage

of

the

R

channel

coincides

with

that

of

the

L

channel.

The

out-

put

voltage

at

EXT

SP

4

2.

jack

will

be

around

0.45

V.

PE

py)

are

PLAYBACK

LEVEL.”

C803

0.02/50V

R806

50k

(D)

R803

2.7

k

6.2

ADJUSTING

THE

HEAD

AZIMUTH

Connect

a

VTVM

across

the

EXT

SP

4

Q

jack.

Play

the

10

kHz

signal

of

the

test

tape

MTT

216

back.

Turn

the

adjusting

screw

until

the

output

voltage

is

maximum.

If

the

maximum

voltages

of

the

both

channels

are

different,

adjust

the

across

to

a

point

at

which

the

output

levels

of

both

channels

are

identical.

After

adjustment,

be

sure

to

point

the

adjusting

screws

to

lock.

Playback

Mode

EXT

SP

42

Jack

6.3

ADJUSTING

TIE

BIAS

CURRENT

Set

the

power

voltage

to

9

V

and

set

the

TAPE

SELEC-

TOR

switch

to

NORMAL.

Set

the

recorder

in

the

record-

ing

mode.

Adjust

the

semifixed

resistors

R512

and

R612

until

the

voltages

across

R519

and

R619

are

5.3

mV.

The

bias

current

will

increase

by

turning

the

semifixed

resistors

R512

and

R612

counter-clockwise

as

locking

toward

part

arrangement.

CRS-2104

6.4

MEASURING

THE

SIGNAL-TO-NOISE

RATIO

(IN

PLAYBACK

MODE)

Play

the

333

Hz

level

adjusting

tape

MTT

112

back.

Let

this

signal

level

at

the

terminal

J701

or

J801

be

a

stand-

ard.

In

turn,

play

a

unrecorded

tape

back

and

read

the

noise

output

level.

VTVM

333

H

Tape

e

Playback

Mode

Unrecorded

Tape

Playback

Mode

6.5

MEASURING

THE

PLAYBACK

FREQUENCY

RESPONSE

Play

the

frequency

response

test

tape

MTT

216

back.

Read

the

signal

levels

at

the

terminal

J701

or

J801

at

various

frequencies

in

reference

to

the

315

Hz

level.

Frequency

VTVM

Response

Tape

Playback

Mode

6.6

MEASURING

THE

COMBINED

RECORDING

AND

PLAYBACK

FREQUENCY

RESPONSE

Connect

a

1

kHz,

—90

dBV

signal

from

an

audio-fre-

quency

oscillator

to

the

external

mic

jack

and

record

it.

Similarly,

record

a

80

Hz,

125

Hz,

6

kHz,

and

8

kHz

sig-

nals.

In

turn,

play

the

recorded

signals

back.

Read

the

signal

levels

at

the

terminal

J701

or

J801

in

reference

to

1

kHz,

0

GB

signal.

AF

Oscillator

J701,

J801

J701,

J801

J701,

J801

1

kHz,

—90

dBV

;

Unrecorded

if

Recording

Tape

/

Mode

Recorded

Portion

Playback

ic

J701,

J801

CRS-2104

6.7

MEASURING

THE

COMBINED

RECORDING

AND

PLAYBACK

LEVEL

Connect

a

1

kHz,

—60

dBV

signal

from

an

audio-fre-

quency

oscillator

to

the

external

mic

jack

and

record

it.

In

turn,

play

the

recorded

signal

back.

Read

the

signal

level

at

the

terminal

J701

or

J801.

The

normal

signal

level

will

be

0.775

V

rms.

AF

Oscillator

1

kHz,

—60

dBV

Unrecorded

Recording

Tape

Attenuator

Mode

Recorded

Portion

Playback

J701,

J801

6.8

MEASURING

THE

COMBINED

RECORDING

AND

PLAYBACK

DISTORTION

Record

and

playback

a

signal

in

a

manner

similar

to

that

for

Item

6.7

above.

Measure

the

distortion.

6.9

MEASURING

THE

COMBINED

RECORDING

AND

PLAYBACK

SIGNAL-TO-NOISE

RATIO

Record

a

signal

in

a

manner

similar

to

that

for

Item

6.7

above.

Rewind

the

tape

a

little.

Make

the

external

mic

jack

short

using

a

short

plug

and

erase

a

part

of

the

re-

wound

tape.

Read

the

signal

level

for

the

1

kHz,

—60

dBV

input

and

the

noise

level

for

the

erased

part.

Sub-

tract

the

noise

level

from

the

signal

level

in

dB.

Short

Plug

Playback

Mode

MIC

Jack

Recorded

Portion

fe

Recording

Mode

J701,

J801

10

6.10

MEASURING

THE

ERASING

LEVEL

Connect

a

1

kHz

bandpass

filter

to

the

terminal

J701

or

J801.

Playback

the

tape

used

in

Item

6.9

above.

Con-

nect

a

1kHz,

—60

dBV

signal

from

an

audio-frequency

oscillator

to

the

external

mic

jack

and

record

it.

In

turn,

play

the

recorded

signal

back.

Read

the

signal

level

in

reference

to

OdB.

Record

a

1

kHz,

—50

dBV

signal

in

a

manner

similar

above

and

rewind

it.

Make

the

external

mic

jack

short

using

a

short

plug

and

erase

the

rewound

tape.

Play

the

erased

portion

back

and

read

the

signal

level

for

the

1

kHz,

—60

dBV

signal.

Recorded

Portion

Playback

100

kQ

1

kHz

Bandpass

Filter

J701,

J801

6.11

CALIBRATING

THE

VU

METER

Connect

a

precisely-adjusted

6.75

V

DC

power

source

to

the

DC

9V

Jack.

Set

the

recorder

in

the

playback

mode.

Adjust

R356

so

that

the

meter

reading

is

between

the

black

and

green

areas

of

the

scale.

CRS-2104

7.

ALIGNMENT

PROCEDURES

7.1.

FM

ALIGNMENT

PROCEDURE

{BAND

switch

in

‘FM’,

MODE

switch

in

“MONO”

and

FUNCTION

switch

in

“RADIO/AUX".)

Connect

Signal

Set

Signal

Set

Tuning

Indicator

Generator

to:

Frequency

to:

Dial

to:

Connection

Procedure

Oscilloscope

vertical

L201

and

Adjust

inductors

for

TP-4

(J104),

10.7

MHz

sweep.

connector

to

TP-6

L202.

highest

and

symmetric

thru

diode.

curve.

87

MHz

with

87

MHz

(max.

L105

(OSC

modulation.

capacitance).

VTVM

across

EXT

sP|

Coil).

Adjust

for

max.

TP-1

(J101),

—+

|}_—_—____——

109

MHz

with

109

MHz

(min.

42

Jack.

CT-1

(trim-

output.

modulation.

capacitance).

mer).

Repeat

Steps

2

and

3.

90

MHz

with

modulation.

VTVM

across

EXT

SP

Adjust

for

max.

42

Jack.

output.

106

MHz

with

i

CT-2

(trim-

z

.

106

MHz.

modulation.

mer).

TP-1

(J101).

Repeat

Steps

5

and

6.

NOTE:

1.

In

adjustment,

connect

the

signal

generator

grounding

terminal

(—)

to

that

of

the

set.

2.

Modulate

the

signal

generator

to

30%

with

a

400

Hz

signal.

3.

Reduce

the

signal

generator

as

Jow

as

possible.

4.

Set

the

VOLUME

control

for

the

maximum

level.

P7Ol

TONE

PWB

yal

|

LIZI-1

LI3I-2

a

9.90

oa

ad

J77T

MW

600KHz

Tr

LW

I70KHz

Tr

PIOl

TP-40FM

iF

INPUT

“OTP:

“yg,

|

FM

RF

INPUT

TP-2

EARTH

HO4

O

TP-8

sae:

|

AM

iF

INPUT

RADIO

OUT

PUT

MW

I650KHz

GUARD

19KHz

PILOT

SIGNAL

OUT

1

LW

320KHz

Tr

|

cl32

—————

2

sw

I6MHz

Tr

(Eh

1

LW

380KHz

GUARD

ci52

2

sw

19

MHz

GUARD

|

11

CRS-2104

7.2.

FM

STEREO

SEPARATION

ALIGNMENT

PROCEDURE

(BAND

switch

in

“FM”

and

MODE

switch

in

“STEREO”.)

Connect

Signal

Generator

to:

Set

Signal

Frequency

to:

Set

Tuning

Dial

to:

Indicator

Connection

Procedure

TP-1

(J101).

>

L

channel

R

channel

Frequency

counter

to

TP-7

(J123).

Adjust

semifixed

resistor

so

that

frequency

coun-

ter

reading

in

19

kHz

is

mechanical

center.

VTVM

to

EXT

SP

42

Jack.

Adjust

semifixed

resistor

for

min.

output

in

R

channel.

Adjust

semifixed

resistor

for

min.

output

in

L

channel.

7.3

MW

ALIGNMENT

PROCEDURE

Repeat

Steps

2

and

3.

(BAND

switch

in

“MW”

and

FUNCTION

switch

in

‘““RADIO/AUX”.)

Connect

Signal

Generator

to:

Set

Signal

Frequency

to:

Set

Tuning

Dial

to:

Indicator

Connection

TP-8

(J104).

455

kHz

with

+35

kHz

sweep.

4.

Oscilloscope

vertical

connector

to

TP-9

thru

diode.

L231

and

L232.

Procedure

Adjust

inductors

for

highest

and

symmetric

curve.

Indirect

coupling

near

set

antenna

coil.

515

kHz

with

modulation.

515

kHz

(max.

capacitance).

1650

kHz

with

modulation.

1650

kHz

(min.

capacitance).

VTVM

across

EXT

SP

4a.

L136

(OSC

coil).

CT-3

(trim-

mer).

Adjust

for

max.

output.

Repeat

Steps

2

and

3.

Indirect

coupling

near

set

antenna

coil.

TT

600

kHz

with

modulation.

600

kHz.

1400

kHz

with

modulation.

1400

kHz.

VTVM

across

EXT

SP

4Q.

t

L131-1

(an-

tenna

coil).

ae

|

CT-4

(trim-

mer).

Adjust

for

max.

output.

NOTE:

In

adjustment,

connect

the

signal

generator

grounding

terminal

(—)

to

that

of

the

set.

Modulate

the

signal

generator

to

30%

with

a

400

Hz

signal.

Reduce

the

signal

generator

as

low

as

possible.

1.

2.

3.

4.

Set

the

VOLUME

control

for

the

maximum

level.

Repeat

Steps

5.and

6.

12

7.4

LW

ALIGNMENT

PROCEDURE

(BAND

switch

in

“LW”

and

FUNCTION

switch

in

“RADIO/AUX"’.)

Connect

Signal

Generator

to:

Set

Signal

Frequency

to:

Indicator

Connection

Set

Tuning

Dial

to:

CRS-2104

Procedure

Indirect

coupl-

145

kHz

with

modulation.

145

kHz

(max.

capacitance).

VTVM

across

EXT

ing

near

set

antenna

coil

380

kHz

with

modulation.

SP4Q.

380

kHz

(min.

capacitance).

Adjust

for

max.

output.

Repeat

Steps

1

and

2.

Indirect

coupl-

170

kHz

with

modulation.

170

kHz.

VTVM

across

EXT

ing

near

set

antenna

coil

320

kHz

with

modulation.

SP

42.

320

kHz.

Adjust

for

max.

output.

7.5

SW

ALIGNMENT

PROCEDURE

Repeat

Steps

4

and

5.

(BAND

switch

in

““SW’’

and

FUNCTION

switch

in

“RADIO/AUX"’.)

Connect

Signal

Generator

to:

Set

Signal

Frequency

to:

Indicator

Connection

Set

Tuning

Dial

to:

indirect

coupl-

ing

near

set

antenna

coil,

5.5

MHz

with

modulation.

aes

Be

5.5

MHz

(max.

capacitance).

VTVM

across

EXT

19

MHz

with

modulation.

19

MHz

(min.

Sega.

capacitance).

Repeat

Steps

1

and

2.

Procedure

Adjust

for

max.

output.

Indirect

coupl-

2

|

ing

near

set

i

7

MHz

with

modulation.

|

VTVM

across

EXT

antenna

coil.

16

MHz

with

modulation.

SP42.

Adjust

for

max.

output.

NOTE:

Repeat

Steps

4

and

5.

1.

In

adjustment,

connect

the

signal

generator

grounding

terminal

(—)

to

that

of

the

set.

.

Modulate

the

signal

generator

to

30%

with

a

400

Hz

signal.

2

3.

Reduce

the

signal

generator

as

low

as

possible.

4

.

Set

the

VOLUME

control

for

the

maximum

level.

13

CRS-2104

8.

DIAGRAMS

8.1

LEVEL

DIAGRAMS

~RECORDING

MODE

(1

V

=

0

dB)-

J70I

JSIS

O

R/PB

HEAD

fe)

©

0.8V

55mv

41.5

(dB)

33.6

(dB)

ay

ae

a

{_oléev

—20

41.5(dB)

\

42.4(dB}

-30

-40

-50

e

Sa

34

(dB)

~60

pat

:

|

f=IKHz

OdB=V

~go

__0.28mv

-90

14

CRS-2104

8.2

BLOCK

DIAGRAM

2SCI359B

age

LOD

ANT

oO

2SC1I047B

2SC

1047C

2SC829B

2SC828C

wPCIISBH2

°°

o_o

oe

ant

?

R/PB

3?

HEAD

Bi

4

PBO

6

EQ

Ic

R

'

Onc

[PB

EO

O

'

omic

|

R

ECM

|

[R-EQ]

|

Fe

i

(L

ch)

|

REG

ES

|

!

H

ERASE

xy,

osc

j

Oi

BLOCK

i |

{

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ch)

;

i

CM

REC

£Q

|

HEE)

R

Mic

[]

e

OPB

R

j

PB

NY

O

O O

;

HEAD

Bi

10.0

of.

Bi

AUDIO

PRE

AMP

ZENER

POWER

AMP

Be

Y

cae

2O

OP

R

O

cae

OPB

ze

8

Q

50

-

JV]

Aux

(R)

2SC1740(R)

MTX

oO

‘STEREO

MONO

MATRIX

2SC1740(R)

BA52I

TONE

VOLUME

|

poweR

AMP

[JExT

spk

HEAD

PHONE

c

I

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|

sPK

4n

(L

ch)

tu

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(R

ch)

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7

4n.

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sPK

BAS2I

HEAD

POWER

TONE

wba

BHONE

HO--220V

AC

110/220V

50Hz

15

BATT

(UM-IX6)

=)

FTZ

REGULATION

Instructions

for

the

use

in

the

range

other

than

specified

in

FTZ

codes.

Achtung

fiir

die

Leute,

die

in

dem

Gebiet

wohnen,

wo

die

FTZ-Bestimmungen

vorherrschend

sind.

Sollte

das

Gerat

auch

fiir

Frequenzen

auszerhalb

des

in

den

FTZ-Bestimmungen

angegebenen

Bereiches

emp-

fangebereit

sein,

bitten

wir,

den

Bereich

durch

Nachstel-

len

des

Kernes

in

der

Oszillatorspule

(in

der

Abbildung

mit

,FTZ"

gekennzeichnet)

so

zu

korrigieren,

da&

er

den

Bestimmungen

entspricht.

CRS-2104

8.3

SCHEMATIC

DIAGRAM

9104,

qi06

9108,

Q133

101

ai02z

Q103

0504~0506

105

Q107

131

132 201

@202,0203

0261,0262

501,060!

2502,0602

503,0603

0551,0651

@90~0904

281,059!

262

28C1047B

2Sc13598

2SCI047C

—Q604~Q606

INGO.

1$2688B

2scea2gc

2sc828c

HAHI25+

INGO.

LN26RP-

MPCIISSH2

TATI4OP:

2SCI740(R)

BASZIMZ

10!

2s0471(U)

RD62EB

1S1555

TR-4

mr

ee

ae

ee

Cee

emma

P10O

C285

glesr

4052

4083

vos:

b-4a]s]-o-o-4]s|

4-4

1096

17

18

Ruy

i

|

RII2

1000,

107

R20:

LOD

ANT

|

C201

L

oor

!

|

isueee)

(RADIO)

R358

6.8

(TAPED

2387

>

33n

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3353-1

ERCANE

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[s3s2-1

fooo»

|

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7

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6051

58a

4550

MW

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sae8

3255,

21

5500

35020,

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ca

=

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TI

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22k

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71

MOTOR

SW

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ERASE

HEAD

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|

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f

1s

|

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330

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|

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3

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$352

AFC

SW

S501

R/P

SW

fedor

ac

(ON

Position)

(REC

Position)

Pov

eae

$353

MODE

SW

S60!

R/P

SW

(MTX

Position)

(REC

Position)

$354

FUNCTION

SW

S!Oi

BAND

SW

(Tape

Position)

(FM

Position)

4901

4908

8.4

CIRCUIT

BOARD

DIAGRAM

J79)

HEAD

PHONE

JACK

soo!

MOTOR

SWITCH

SPEAKER

2602

WHIP

ANTENNA

Aoo!

fe

~N

S

x

CONDENSER

MIC

(R)

EXT

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BAR

ANTENNA

POWER

TRANS

LW

(c(Ceammg

(Cae

R/P

HEAD

AC

INPUT

yg0)

JACK

FM

STEREO

IND.

CONDENSER

MIC

(L)

BATTERY

(UM

|

x6)

CRS-2104

:

CRS-2104

9.

MAJOR

COMPONENT

LOCATIONS

10.

EXPLODED

VIEWS

AND

PARTS

LIST

9.1

CABINET

-

FRONT

VIEW

10.1

[C01-99]

FRONT

CASE

004B

A001

2051

Z061

———--—D

2052-———~

2062

J791

A

|

9.2

CHASSIS

-

TOP

VIEW

|

E

F

R709

$354

R7

|

OB

|

$352

|

*

1

4240064400

|

Case

Assembly

(A.B.C.)

1

4210064470

|

Case

Assembly

(Cassette)

ee

4210064550

|

Case

a

$101

|

1

|

4240064410

|

Case

Assembly

(Front)

3320115043

|

Spring

!

2

4210057012

|

Leg

P701:

P200

i

2

4210104020

Retainer

1114005010

|

Clamper

2

5413060000

|

Wave

Washer

51100305A9

|

B.H.M.Screw

HO01-

2

54020601A0

|

Flat

Washer

4210115010

Spring

2

52040306A9

|

H.

Head

Bolt

51280308B0

|

B.H.TAP.

Screw

mo

1

4210253010

|

Handle

01

2

|

5110030889

|

B.H.M.

Screw

Mss0090040

|

MIC.

Unit

2

3426056020

Buffer

QK01203050

|

Speaker

J501

1

4123158032

|

Window

MS50090040

|

MIC.

Unit

j

QK01203050

|

Speaker

P702

i

1

3347274010

|

Reflector

J055

1

4240063010

|

Escutcheon

|

1

4240265010

Indicator

1

4210064015

|

Case

P703

J901

2

4210202012

|

Net

2

4210063012

Escutcheon

J791

T901

2

4210107010

|

Sheet

2

4210107020

Sheet

21

22

Marantz SUPERSCOPE CRS-2104 User manual

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