Marantz SUPERSCOPE CD-320 Mounting instructions

SUPERSCOPE.

BY

Rane

Been

ue

iz

©

SUPERSCOPE

INC.

20525

NORDHOFF

STREET

CHATSWORTH,

CALIFORNIA

91311-U.S.A

ee

CD-320

SUPERSCOPE

DESIGN

AND

SERVICE

Using

superior

design

and

selected

high

grade

components,

SUPERSCOPE

has

created

the

ultimate

in

stereo

sound.

Only

original

SUPERSCOPE

parts

can

insure

that

your

SUPERSCOPE

product

will

continue

to

perform

to

the

specifications

for

which

it is

famous.

Parts

for

your

SUPERCOPE

stereo

are

generally

available

within

72

hours

throughout

the

nation

via

a

toll-free

line

to

our

National

Parts

Depot

in

California.

The

sales

professionals

who

take

your

call

immediately

refer

to

their

own

desk

top

com-

puter

terminal

and

can

quickly

determine

the

availability

and

price

information

you

require.

If

for

some

reason,

your

order

should

exceed

our

available

stock,

we

usually

can

instantly

provide

an

alternate

replacement

part

or

current

delivery

infor-

mation.

When

the

order

is

placed

and

confirmed,

the

computer

simultaneously

generates

‘‘hard

copy”

orders

at

the

distribution

center.

As

hard

copies

come

directly

from

the

computer

to

the

national

parts

depot,

your

requested

stock

is

assembled

and

prepared

for

shipment

and

placed

on

the

first

available

carrier

for

delivery

to

you.

ORDERING

PARTS

Phone

orders

will

eliminate

mail

delays,

and

we

encourage

the

use

of

this

method.

If

you

order

by

mail,

use

SUPERSCOPE

parts

order

forms

which

are

available

from

our

National

Parts

Depot

located

at

the

following

address:

SUPERSCOPE

NATIONAL

PARTS

DEPARTMENT

20525

Nordhoff

Street

Chatsworth,

California

91311

Phone:

1-800-423-5108

1-213-998-9333

The

following

information

must

be

supplied

to

eliminate

delays

in

processing

your

order:

.

Complete

address.

.

Complete

part

numbers.

.

Complete

description

of

parts.

.

Model

number

for

which

part

is

required

(indicate

SUPERSCOPE).

.

Account

number

(for

account

customers

only).

ahwohrhd—

Direct

consumers

will

be

provided

with

the

current

retail

prive

quotation

on

available

parts

in

order

to

advise

them

of

the

cost

of

the

parts

and

shipping.

OVERSEAS

PARTS

ORDERING

Parts

may

also

be

ordered

from

the

following

overseas

addresses:

CANADA

AUSTRALIA

JAPAN

Superscope

Canada,

Ltd.

Superscope

(Australasia)

Pty.,

Ltd.

Marantz

Japan,

Inc.

3710

Nashua

Drive

32

Cross

Street

(P.O.

Box

604)

3622

Kamitsuruma

Mississauga

Brookvale

2100

N.S.W.

Sagamihara

Shi

Ontario,

Canada

L4V1M5

Australia

Kanagawa,

Japan

EUROPE

Superscope

Europe,

S.A.

Marantz

France

Marantz

Audio

U.K.

Ltd.

Superscope

GmbH

Avenue

Leopold

111,

2

Rue

Louis

Armand

9

London

Road,

203

Max-Planck-Strasse

22

7120

Peronnes-Lez-Binche

92600

Asnieres

Staines

D-6072

Dreieich

1

Belgium

Hauts-de-Seine

Middlesex

West

Germany

France

England

All

of

the

above

locations

are

fully

equipped

to

take

care

of

your

total

service

needs.

Because

various

countries

have

differing

configuration

requirements,

it

is

necessary

that

you

contact

the

service

facility

in

your

particular

country.

In

the

event

that

there

is

no

service

location

listed

for

your

country,

please

contact

the

nearest

facility

for

the

necessary

assistance.

SUPERSCOPE..

BY

wee

Breese

we

Ew.

©

Cd-320

CD-320

mounted

on

a

printed

circuit

board

is

described

with

the

square

enclosed

by

bold

dotted

line

on

the

circuit

TABLE

OF

CONTENTS

1.

FEATURES

Block

Diagram

=

SO©HNDAAWNR

—_—

=

Level

Diagram

2.2...

ee

es

Schematic

Diagram...

1...

ee

ees

Circuit

Board

Diagram

«1...

ee

es

Exploded

View

and

Parts

List

.............0005

Electrical

Parts

List

2.2...

00.

cee

ee

es

SPECIFICATIONS

GENERAL

Dimensions

(W

x

H

x

D)

29.3

x

8.2

x

19.5cm

(115/s

x

3%

x

7%

inches)

3.6

kg

(7

|b

15

oz)

with

batteries

3.2

kg

(6

Ib

10

oz)

without

batteries

Power

Requirements

Four

UM-1,

‘’D’’

size

flashlight

batteries

(Rechargeable

pack:

Model

RBD-1)

AC:

For

Europe

....

220/110

V,

50

Hz,

13W

For

USA

&

Canada

120

V,

60

Hz,

13

W

Number

of

Semiconductors

Transistor

Terminals

Input:

Microphone

(one

for

each

channel)

Plug

Type

..

Input

Sensitivity

Impedance

Line

(Aux)

(one

for

each

channel)

RCA

Input

Sensitivity

Impedance

Output:

Line

(one

for

each

channel)

Plug

Type

Output

Level

Impedance

DIN

(Rec./Play)

Plug

Type

Input

Sensitivity

Input

impedance

Output

Level

800

mV

at

+1.9

VU

Output

Impedance

(one

for

each

channel)

Plug

Type

Power

Output

Stereo

Headphone

Plug

Type

Impedance

AC

Inlet

TAPE

RECORDING

SECTION

PHI

LIPS

Type

Compact

Cassette

Tape

Recording

System

.

Quarter

track

stereo,

AC

Bias

Erasing

System

Half

track,

AC

Erase

Rewind

&

Fast

Forward

Time

110

sec/C-60

Number

&

Type

of

Motor

One

DC

servo

The

tape

recorder

can

be

set

to

the

recording

mode

just

by

pressing

the

REC

button.

There

is

no

need

to

press

the

PLAY

button.

1.3

Automatic

Total

Mechanism

Shut

Off

When

the

tape

comes

to

the

end

in

any

of

the

play-

back,

record,

fast

foward

and

rewind

modes

of

opera-

tion,

the

tape

tension-controlled

auto-stopper

actuates

to

automatically

release

the

locked

pushbutton.

It

takes

2

to

6

seconds

to

release

the

pushbutton

after

the

tape

is

wound

up;

note

that

the

interval

becomes

longer

with

decrease

of

the

power

line

voltage.

Locked

PAUSE

pushbutton

prevents

operation

of

the

auto-

stopper.

1.4

Dual

Flywheel

Mechanism

Applying

two

flywheels

turning

round

oppositely

to

each

other,

the

strength

caused

by

wobble

or

others

is

canceled

each

other,

and

stable

performance

of

fly-

wheel

rotation

is

always

assured.

1.5

Cue

and

Review

Pushbuttons

By

depressing

the

CUE

or

REVIEW

pushbutton,

the

tape

can

be

fast

forward

or

rewind

while

monitoring

recorded

sound.

This

feature

is

very

convenient

for

easy

reference

and

indexing

or

repeated

playback.

By

depressing

the

CUE

or

REVIEW

pushbutton

with

the

PLAY

pushbutton

leaving

depressed,

the

pinch

roller

is

separated

from

the

capstan,

allowing

the

tape

to

be

run

at

a

high

speed.

1.6

Four-Way

Power

Supply

The

Model

CD-320

can

be

operated

by

four

power

sources:

dry

cells

(UM-1

x

4),

AC

power

line,

external

DC

power

supply

(DCA-6,

sold

separately)

and

re-

chargeable

battery

back

(RBD-1,

sold

separately).

To

prevent

the

possibility

of

being

overloaded

by

two

or

more

power

sources,

the

contacts

of

the

AC

jack

(JOO1)

and

external

DC

jack

(JO002)

automatically

select

only

one

power

supply

in

the

following

pri-

ority:

1.

AC

power

line;

2.

external

DC

power

supply;

3.

dry

batteries

(rechargeable

battery

pack).

Thanks

to

its

built-in

recharge

circuit,

even

when

not

operated,

the

Model

CD-320

can

recharge

the

rechargeable

battery

pack

as

long

as

it

is

connected

to

AC

power

line

or

external

DC

power

supply.

2.

SERVICE

NOTE

As

can

be

seen

from

the

circuit

diagram,

the

chassis

of

Model

CD-320

consists

of

following

units.

Each

unit

1.1

Fully

Selectable

Automatic

Record

Level

and

Peak

diagram.

whe

si

te

ha

eh

aioe

AES

Le

tle

Mt

a

aE

can

Limiter

Pre-Amp,

Power

Supply,

Switch,

Features:

20s

kc

Oar

end

ee

a

A

tis

Ss

cg

Glee

oe

Bee

Sate

bade

be.

Fo

oe

a

ia

i

ic

ts

ad

Service

Note:

“esos

ane

CAS

Seg

Ge

a

eee

Wide

woe

AE

A

poe

S

De

hee

We

Haak

ee

eae

ee

ee kw

ns

According

to

program

source,

three

selections

are

erimlngle~

ooo.

orisha

ables

mounted

on

P.W.

Board

P500

Test

Equipment

Required

for

Servicing

Replacement

...

1.0...

00.0

eee

possible

—

ARL,

LIMITER

and

MANUAL.

rower

Salect

(N

Version)

..

.

oul’

on

aw.

eee

£400

H

A

Codey.

4

Cena

tee

er

ae

mounted

on

P.WVV.

Goar

Bottom

Case

Cover

and

Chassis

Disassembling

Procedures

...

2...

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2.00

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4

ate

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Adjustment

and

Measurement

(Audio)

Instructions

2.6...

26...

eee

ee

‘i

9

Rechargeable

..........

mounted

on

P.W.

Board

P801

Fuse

(UC

Version)

.......

mounted

on

P.W.

Board

P900

3.

TEST

EQUIPMENT

REQUIRED

FOR

SERVICING

REPLACEMENT

For

measuring

checking

the

Model

CD-320,

the

follow-

ing

instruments

and

materials

are

necessary.

@

Audio

Oscillator

(af

OSC)

@Attenuator

(600

22)

eVTVM

@

Distortion

Meter

©

Oscilloscope

©@

Bandpass

Filter

@Wow

and

Flutter

Meter

@

Torque

Meter

(Cassette

Type}

@

Digital

Frequency

Counter

@Blank

Tape

(Completely

erased

with

bulk

eraser)

TDK

AC-211

(Normal)

TDK

AC-511

(CrO2)

SONY

CS-30

(Fe-Cr}

NOTE:

{f

any

doubt

is

noted

in

a

measured

value,

used

new

tape.

®Test

Tapes

(New

Tape)

MTT-111

Wow

and

Flutter,

Tape

Speed

MTT-112

Measurement

of

Output

Level,

Signal-to-Noise

Ratio

MTT-150

Adjustment

of

Output

Level

|

MTT-116U

Frequency

Response

(for

Normal)

MTT-116K

Frequency

Response

(for

CrO2,

Fe-Cr}

MTT-121

Cross

Talk

MTT-141

Channel

Separation

MTT-115C

Playback

EQ,

Azimuth

BIAS

and

EQ

switches

setting

in

accordance

with

tape

used

are

as

follows:

Bias

Normal

Low

CrO2

High

Fe-Cr

a

Low

CD-320

4.

BOTTOM

CASE

COVER

AND

CHASSIS

DISASSEMBLING

PROCEDURES

4-3

Removing

Top

Case

Remove

three

screws

1

to

3.

Pull

the

top

case

in

the

direction

of

an

arrow,

and

it

will

be

removed.

At

that

time,

remove

the

connection

wire

(soldered)

of

the

speaker.

4-1

Removing

Cassette

Cover

Pull

the

cover

pushing

A

and

B

in

the

direction

of

an

arrow.

Then

the

cover

will

be

removed.

4-4

Removing

Front

Case

Remove

the

dials

A

and

B

and

remove

four

knobs.

Remove

four

screws

1

to

4

from

the

sides.

Remove

the

front

case

in

the

direction

of

an

arrow.

At

that

time,

it is

recommended

to

lower

the

control

buttons

before

the

front

case

is

removed

since

it

is

difficult

to

remove

it

due

to

catching

of

it

by

the

control

buttons.

4-2

Removing

Rear

Cover

Remove

six

screws

1

to

6

at

the

rear.

Remove

screws

7

and

8

at

the

bottom.

Pull

the

rear

cover

in

the

direc-

tion

of

an

arrow,

and

it

will

be

removed.

CD-320

ON;

N

=

i

BESS

Sof

NE

Cl

7

Yi

Ma

,

and

the

mechanism

will

w+

£°

“nn

Ze

Ow

$3

fh

=9

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£5.

oy

£

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eog

€

2

©

®

»

sa

5

nN

Remove

four

screws

1

and

then

remove

nuts

A

and

B.

Remove

screws

2

to

4

from

the

PW

board.

Remove

the

PW

board

in

the

direction

of

an

arrow.

4-5

Removing

PW

Board

a

ke

5.

ADJUSTMENT

AND

MEASUREMENT

(AUDIO)

INSTRUCTIONS

Precautions:

Prior

to

any

adjustment

or

measurement,

clean

the

head

slits

with

gauze

containing

alcohol

or

5-A

MECHANICAL

ADJUSTMENTS

carbon

tetrachloride,

and

fully

demagnetize

the

heads,

capstan

and

similar

parts.

5A-1

Play

Operation

Check

(1)

Timing

Check

®Depress

button

PLAY,

and

check

to

make

sure

that

the

take-up

reel

rotates

first

and

then

that

the

pinch

roller

rotates.

Simultaneous

rotation

of

these

reel

and

roller

is

not

acceptable.

NOTE:

For

this

check,

slowly

depress

the

button

without

tape

mounted

regardless

of

locking

condi-

tion.

@Slowly

depress

button

PLAY,

and

the

take-up

reel

will

start

rotation.

At

that

time,

check

to

make

sure

that

a

clearance

between

the

pinch

roller

and

capstan

is

less

than

0.5

mm.

CAPSTAN

SHAFT

,

te

PINCH

ROLLER

Ny

\\HEAD

CHASSIS

STOPPER

(2)

Timing

Adjustment

If

out

of

specification,

bend

the

part

of

the

pinch

roller

bracket

which

faces

the

head

chassis

stopper.

{n

the

figure

shown

above,

bend

the

part

in

the

direction

of

A

to

decrease

the

clearance.

To

increase

the

clearance,

bend

the

part

in

the

direction

of

B.

NOTE:

After

adjustment,

check

to

be

sure

that

the

pinch

roller

bracket

does

not

contact

the

head

chassis

stopper

in

PLAY

mode.

5A-2

Pause

Timing

Depress

button

PLAY,

slowly

depress

button

PAUSE,

and

the

take-up

reel

will

pause.

At

that

time,

check

to

ensure

that

a

clearance

between

the

pinch

roller

and

capstan

ranges

from

0.2

to

0.5

mm.

If

out

of

the

range,

adjust

a

bending

angle

of

the

pinch

roller

bracket

arm

(view

A).

NOTE:

To

increase

a

clearance

between

the

pinch

roller

and

capstan,

decrease

the

angle

(in

the

direction

of

C

in

the

figure).

To

decrease

the

cleanrace,

increase

the

angle

(in

the

direction

of

B).

5A-3

Torque

Adjustment

(FF,

REW)

Set

the

extended

parts

(B

in

the

figure

shown

above)

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

stepping

part

of

‘‘INCREASE”’

and

to

decrease

it,

set

those

to

the

stepping

part

of

‘‘DECREASE”’.

Adjusting

range:

70

~

110

g.cm.

INCREASE

DECREASE

5A-4

Pinch

Roller

Pressing

Force

As

shown

above,

measure

pressing

force

of

the

pnch

roller

using

a

gauge.

For

measurement,

proceed

as

follows.

Pull

the

pinch

roller

off

the

capstan

haft

as

shown

with

the

arrow,

and

gradually

release

it

tcthe

capstan.

Just

when

the

pinch

roller

starts

rotating,

‘e

ad

an

indication

of

a

gauge.

Pressing

force

must

rane

in

300

g

+50

g.

If

our

of

the

range,

bend

the

pinch

rf

fer

spring

in

the

direction

of

B

or

C

at

section

A

smwn

above.

NOTE:

To

increase

pressing

force,

bend

the

said

spring

in

the

direction

of

B,

and

to

decrease

the

force,

betcf

it.

in

the

direction

of

C.

CD-320

5A-5

Torque

Adjustment

(PLAY)

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.

NOTE:

(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

acceptable.

5A-6

Flywheel

Thrust

Adjustment

Adjust

a

clearance

between

the

capstan

tail

end

and

thrust

bearing

to

a

range

from

0.1

to

0.3

mm

as

shown.

Adjust

the

thrust

screw

in

the

flywheel

bracket

using

a

Philips

screwdriver.

Since

the

clearance

cannot

be

directly

measured,

capture

a

distance

in

an

axial

step

of

the

flywheel

with

the

sensibility.

After

adjustment

has

completed,

secure

the

thrust

screw

with

the

screw

lock.

INCREASE

DECREASE

OO

2277

psa)

5A-7

Installation

of

Motor

Pulley

Check

to

ensure

that

a

clearance

between

the

DC

motor

and

pulley

is

3.1

mm.

If

out

of

specification,

reposition

the

pulley

as

shown.

5A-8

Tape

Speed

Adjustment

Mount

3

kHz

test

tape

on

the

set,

and

check

to

make

sure

that

the

meter

pointer

of

a

measuring

instrument

(frequency

counter)

indicates

3000

Hz

+3%

or

less

as

specified.

If

tape

speed

exceeds

the

high

limit,

replace

the

pulley

with

a

pulley

of

parts

No.

4367262050.

If

the

speed

is

lower

than

the

low

limit,

replace

it

with

a

pulley

of

parts

No.

4367262040.

CD-320

5-B

ELECTRICAL

ADJUSTMENT

‘@

3

F305

'@

&

BATT

CHECK

ADu.

/@

\R301

1

TARL

BALANCE.

---1

RI36

Leh’@

©

METER

LEVEL

ADv.

Ber

R236

Ren

@

f

R218

PLAYBACK

LEVEL.

Rech

‘OE

fi

R215

Reh

an

ve

PravBack

£0.22)

/@}

1

iris

RUS

PLAYBACK

LEVEL

.

5B-1

Azimuth

Adjustment

Play

back

the

10

kHz

or

6.3

kHz

standard

alignment

tape.

Adjust

the

azimuth

adjusting

screw

836

N.

After

adjustment,

repeatedly

start

and

stop

the

tape

several

times

to

ensure

no

azimuth

deviation.

Moae

:

Playback

vtIvm

(10

kHz)

8

=

I

eae

Sg

al

os

ee

ExTs

CD-320

5B-2

Meter

Adjustment

SET

UP

1.

Power

voltage:

DC4.5V

2.

Batt.

check

switch

position:

ON

PROCEDURES

1.

Set

up

the

unit

for

the

playback

mode

of

operation.

2.

Apply

an

external

DC

4.5

V

source

to

the

DC

6

V

jack.

Adjust

R305

so

that

the

meter

reading

is

OVU

point

of

scale.

Ss

‘pe

7

BOS

'@

1

BATT

CHECK

ADv.

---3

RI36

”

METER

LEVEL

ADu.

2

R236

5B-3

Head

Azimuth

Adjustment

SET

UP

1.

Power

voltage:

@

50/60

Hz

voltage

rated

for

the

unit

to

be

used

in

a

market

country.

®

DCEV

2.

Output

terminal:

LINE

Output

3.

EQ

switch

position:

120

uS

4.

Test tape

used:

MTT-115C

PROCEDURES

1.

Play

the

10

kHz

portion

of

the

test

tape

MTT-

115C

back.

Adjust

the

head

azimuth

adjusting

screw

for

maximum

VTVM

read.

2.

If

the

peak

output

reads

of

the

right

and

feft

chan-

nels

are

different,

set

the

screws

to

obtain

the

mechanical

center

between

the

peaks.

CAUTION

After

adjustment,

repeat

the

playback

and

stop

setting

a

few

times

to

make

certain

of

no

head

azimuth

deviation.

————_——_

5B-4

Tape

Speed

Adjustment

SET

UP

1.

Power

voltage:

e@

50/60

Hz

AC

voltage

rated

for

the

unit

to

be

used

in

a

market

country.

e

DC6V

2.

Output

terminal:

LINE

Output

3.

Test

tape

used:

MTT-111

(3

kHz

tone)

4.

Unit

position:

|

Horizontal

PROCEDURE

Play

the

mid

position

of

the

test

tape

MTT-111

back.

Adjust

the

tape

speed

adjusting

semi-fixed

resistor

3000

+5

Hz

counter

indication.

CAUTIONS

1.

For

adjustment

the

unit

should

be

set

up

in

the

normal

operating

condition.

2.

Do

not

proceed

the

semi-fixed

resistor

more

turns

than

needed.

3.

Do

not

proceed

with

adjustment

after

the

unit.

4.

\f

a

strong

shock

or

similar

vibration

is

applied

to

the

unit

after

adjustment,

make

certain

that

the

measured

tape

speed

had

not

changed.

5.

If

the

speed

deviation

occurs,

perform

the

adjust-

ment

again.

6.

Be

careful

that

the

counter

may

indicate

a

wrong

value

because

of

too

low

counter

level.

7.

Before

adjustment,

allow

for

30

seconds

or

more

after

depressing

of

the

PLAY

pushbutton.

CD-320

5B-5

Playback

Output

Level

Adjustment

SET

UP

1.

Power

voltage:

@

50/60

Hz

voltage

rated

for

the

unit

to

be

used

in

a

market

country.

e@

DC6V

2.

Output

terminal:

Q109

3.

EQ

switch

position:

120uS

4.

Test

tape

used:

MTT-150

Terminal

No.

8,

9

of

Dolby

IC

PROCEDURES

1.

Play

the

test

tape

MTT-150

playback.

Adjust

R118

and

R218

(20

kQ

each)

for

775

mV

playback

out-

put

level.

2.

Proceed

both

for

the

right

and

left

channels

in

the

same

manner.

CAUTION

This

adjustment

should

be

performed

after

the

one

for

the

playback

equalizer.

If

the

playback

equalizer

is

adjusted

after

the

playback

output

adjustment,

the

playback

output

should

be

readjusted.

Mode:

playback

vTVvM

Rais

Reh

c~~

5

PLAYBACK

EO.

2

@}

CD-320

5B-6

Playback

Equalizer

Adjustment

SET

UP

1.

Power

voltage:

®@

50/60

Hz

voltage

rated

for

the

unit

to

be

used

in

a

market

country.

e

DC6V

2.

Output

terminal:

LINE

Output

3.

EQ

switch

position:

120

uS

4.

Test

tape:

MTT-115C

PROCEDURES

1.

Play

the

test

tape

MTT-115C.

Let

the

333

Hz

signal

level

be

reference

as

O

dB.

2.

Adjust

R115

and

R215

(3

kQ

each)

for

10

kHz

frequency

response

of

O

to

O

dB

in

reference

to

the

333

Hz

signal

level.

.

Proceed

both

for

the

right

and

left

channels

in

the

same

manner.

.

Note

that

clockwise

turning

of

R115

and

R215

will

increase the

10

kHz

signal

output

level.

Mode:

playback

Tone.

315Hz—14kHz

R218

PLAYBACK

LEVEL.

—

Reve

5

R215

Reh

c~

ry

PLAYBACK

EQ.

©

5B-7

VU

Meter

Adjustment

SET

UP

1.

Power

voltage:

@

50/60

Hz

AC

voltage

rated

for

the

unit

to

be

used

in

a

market

country.

e

DC6EV

2.

TAPE

selector

switch

position:

NORMAL

3.

Load:

Measuring

instrument

input

impedance

4.

Output

terminal

used:

Terminal

No.

8,

9

of

Dolby

IC

Q109

PROCEDURES

1.

Play

the

test

tape

MTT-150.

2.

Adjust

R136

and

R236

(2

k&2

each)

until

the

VU

meter

pointer

deflects

to

the

DOLBY

mark

(DQ)

on

the

VU

meter.

Mode:

record

Tone

IkHz

at

OSC

ro

Pret

mic

JN25,

J225

‘@

2

F305

(@

5

BATT

CHECK

ADU.

727}

RABE

ch,

\@

t

METER

LEVEL

ADy.

Ra’

a

R236

r

7

R36

ied

DOLBY

Apv.\@

Reh

oo

Raa

\@

©

REC

LEVEL

ADU.

Leh

‘5

TI

RI

ie

Rs

pea

|

Marantz SUPERSCOPE CD-320 Mounting instructions

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