Technics RS-M215 Manuale utente

Metal

Tape

Compatible

Stereo

Cassette

Deck

with

FL

Meters,

Soft-Touch

Controls

and

Rewind

Auto-Play

Convenience

DO

oxy

svsrew)

RS-M24

MECHANISM

SERIES

Specifications

Track

system:

Tape

speed:

Wow

and

flutter:

Frequency

response:

Signal-to-noise

ratio:

Fast

forward

and

rewind

time:

Inputs:

4-track

2-channel

stereo

recording

and

playback

4.8cm/s

0.05%

(WRMS),

+0.14%

(DIN)

Metal

tape;

20—-17,000Hz

30—

15,000

Hz

(DIN)

CrOz

tape;

+20—16,000Hz

30—

15,000

Hz

(DIN)

Normal

tape;

20

—

15,000

Hz

.

30—

13,000

Hz

(DIN)

Dolby

NR

in;

66dB

(above

5kHz)

Dolby

NR

out;

56dB

(signal

level

=

max.

recording

level,

CrO2

type

tape)

Approx.

90

seconds

with

C-60

cassette

tape

MIC;

sensitivity

0.25

mV,

input

impedance

60

kQ

applicable

microphone

impedance

4002—

10kQ

LINE;

sensitivity

60

mV,

input

impedance

47

kQ

Outputs:

Rec/Pb

connection:

Bias

frequency:

Motor:

Heads:

Power

requirements:

Power

consumption:

Dimensions

:

Weight

:

Specifications

are

subject

to

change

without

notice.

+

‘Dolby’

and

the

double-D

symbol

are

trademarks

of

Dolby

Laboratories.

Technics

ORDER

NO.

ARD-8012129C09

ervice

Manual

Cassette

Deck

RS-M215

bas

Face

Black

—)

This

is

the

Service

Manual

for

the

following

areas.

For

all

European

areas

except

United

Kingdom.

[B)

-++-----

For

United

Kingdom.

LINE;

output

level

420

mV,

output

impedance

1.5kQ

or

less,

load

impedance

22k

2

over

HEADPHONE

;

output

level

80

mV

load

imped-

ance

822

5P

DIN

type;

input

sensitivity

0.25mV,

impednce

5.3k2

output

level

420

mV,

impedance

1.5

kQ

80

kHz

Electrical

DC

governor

motor

2-head

system

1-MX

head

for

record/playback

1-double-gap

ferrite

head

for

erasue

[D}---

AC

110/220

V,

50-60Hz

(fo

alll

European

areas

except

United

Kingdom)

--

AC

240V,

50Hz

(only

for

Untecd

Kingdom.)

11W

43.0cm(W)

X

12.2.

cm(H)

x

20.6cn(D)

3.9kg

Matsushita

Electric

Trading

€o.,

Ltd.

P.O.

Box

288,

Central

Os-aka

Japan

RS-M215

CONTENTS

ITEM

PAGE

LOCATION

OF

CONTROLS

AND

COMPONENTS

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1

DISASSEMBLY

INSTRUCTIONS

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2

MEASUREMENT

AND

ADJUSTMENT

METHODS

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3

ELECTRICAL

PARTS

LOCATION

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SCHEMATIC

DIAGRAM

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7

CIRCUIT

BOARDS

AND

WIRING

CONNECTION

DIAGRAM

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8

MECHANICAL

PARTS

LOCATION

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9

CABINET

PARTS

LOCATION

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9

LOCATION

OF

CONTROLS

AND

COMPONENTS

@

Power

switch

(power)

@

Cassette

holder

@

Tape

counter

and

Reset

button

(tape

counter)

@

Recording

indication

lamp

(rec)

®

Fluorescent

level

meters

Eject

button

(A

eject)

@

Record

button

(O

rec-()

Rewind/Review

button

(4€<4

rew/rev)

Fast

forward/Cue

button

(>

P

ff/cue)

Play

button

(Pm

play-(@)

@

Stop

button

(I

stop)

@

Pause

button

(||

pause)

@3

Headphone

jack

(phones)

Tape

selector

[tape

select

(Metal*CrO

2-normal)]

@®

Dolby

noise-reduction

switch

[Dolby

NR

(in-out)]

Input

selector

[input

select

(line-mic

(DIN))]

@

Input

level

controls

[input

level

(leftright)]

TT

a

.

Microphone

jacks

[mic

(lefteright)]

HAN

nnEOgg009

Record/Playback

connection

socket

(REC/PLAY)

—

@

Voltage

selector

(VOLTAGE

SELECTOR)

@

Line

output

cord

(LINE

OUT)

@

Line

input

cord

(LINE

IN)

DISASSEMBLY

INSTRUCTIONS

*

The

head

azimuth

can

be

adjusted

by

removing

the

cassette

lid.

Fig.

5

(C)

1

_

FL

METER

|

J

SSS

SS

ee

Se

“I

(L)

METER

HOLDER}

RS-M215

Procedure

To

remove

——

.

Shown

in

fig.

—.

Case

cover

*

2

Screws

Bottom

cover

Front

panel

+

5

screws

*

2

control

knobs

*

Cassette

lid

+

5

screws

*

Binder

Back

chassis

*

4

screws

*

4

binders

*

Recording

wire

Mechanism

unit

*

4

screws

1-23-46

FL

meter

circuit

board

*

FL

meter

and

FL

meter

circuit

board

can

be

easily

removed

when

meter

holder

(L)

is

pushed

in

the

direction

of

the

arrow

shown

in

fig.

8.

*

Binder

*

Meter

holder

I>

2>3>9>>/

Operation

button

unit

*

Cassette

holder

*

2

screws

RS-M215

N

D

ADJUSTMENT

M

ETHODS

NOTES:

Keep good

condition,

set

switches

and

controls

in

the

following

positions,

unless

otherwise

specified.

M

EASU

REM

ENT

A

@

Make

sure

heads

are

clean.

@

Tape

selector:

Normal

position

©

Make

sure

capstan

and

pressure

roller

are

clean.

®

Input

selector:

Line

in

ADJUSTMENT

PARTS

LOCATION

@

Judgeable

room

temperature:

20

+5°C

(68+9°F)

@

input

level

controls

:

Maximum

@

Dolby

NR

switch:

OUT

MEASUREMENT

&

ADJUSTMENT

Tape

speed

adjustment

VR

Screw

(A)

®

Head

position

(The

head

adjusting

plate

is

provided

to

adjust

the

tape

Head

Adjusting

Plate

adjustment

touch

of

the

head

in

cue

or

review

mode.)

Capstan

ud

Condition:

1.

Press

the

playback

button

and

pause

button

—

a

*

Playback

and

pause

mode

2.

Measure

the

space

between

the

pressure

roller

and

the

Rs

capstan.

(fe

Pressure

Roller

Standard

value:

0.5+0.3mm

ve

Q

Space

(adjustable)

3.

If

the

measured

value

is

not

within

the

standard

value,

untighten

screw

(A),

and

slide

the

head

adjusting

plate

in

the

direction

of

arrow

(B)

for

adjustment

@

Head

azimuth

L-ch/R-ch

output

balance

adjustment

1.

Make

connections

as

shown

in

fig.

4.

Condition:

*

Playback

mode

“VTVM.

Os

cilloscope

Playback

mode

Small

hole

Equipment

2.

Playback

the

8kHz

signal

from

the

test

tape

(QZZCFM).

Fig.

4

*VTVM__

+

Oscilloscope

Adjust

screw

(B)

in

fig.

5

for

maximum

output

L-ch

and

Record/olavbadk

Please

use

non

metal

type

screwdriver

when

*

Test

tape

(azimuth)

R-ch

levels.

g

head

you

adjust

tape

speed

accuracy

on

this

unit.

»

QZZCFM

When

the

output

levels

of

L-ch

and

R-ch

are

not

at

maximum

at

the

same

time,

readjust

as

follows.

A

3.

Turn

the

screw

shown

in

fig.

5

to

find

angles

A

and

C

(points

where

peak

output

levels

for

left

and

right

channels

sue)

Fig.

1

are

obtained).

Then,

locate

the

angle

B

between

angles

A

Fig.

5

and

C,

i.e,

2

point

where

L-ch

and

R-ch

output

levels

come

Leh

peak

level

poh

peak

level

together

at

maximum.

(Refer

to

figs.

5

and

6.)

fi

-s

<>

L-ch/R-ch

phase

adjustment

4.

Make

connections

as

shown

in

fig.

7.

5.

Playback

the

8kHz

signal

from

the

test

tape

(QZZCF™M).,

Adjust

screw

(B)

shown

in

fig.

5

so

that

pointers

of

the

two

VTVMs

swing

to

maximum

and

a

waveform

as

illustrated

in

Fig.

6

fig.

8

is

obtained

on

the

oscilloscope

>

wo

exe

——_—>

ANGLE

Record/playback

Playback

mode

TE

Fig.

7

Vertical

Horizontal

Fig.

8

@

Tape

speed

Tape

speed

accuracy

Record/playback

head

LINE

OUT

3

Condition:

1.

Test

equipment

connection

is

shown

in

fig.

9.

of)

*

Playback

mode

2.

Playback

test

tape

(QZZCWAT

3,000Hz),

and

supply

P|

_

=}

fo

i

Equipment:

playback

signal

to

frequency

counter

Test

tape

'lavback

mes

Digital

electronic

counter

3.

Measure

this

frequency.

Fig.

9

*

Digital

electronic

counter

or

frequency

counter

4.

On

the

basis

of

3,000Hz,

determine

value

by

following

*

Test

tape

---

QZZCWAT

formula:

Tape

speed

accuracy

=

f

--

3,000

Take

measurement

at

middie

section

of

tape

VR1

R202

VR2

VR201

hic

x

100(%)

where,

f

=

measured

value

Refer

to

@

Fluorescent

meter

at

page

6.

Standard

value:

+1.5%

Fig.

2

Adjustment

method

1.

Playback

the

test

tape

(middle).

2.

Adjust

so

that

frequency

becomes

3,000

Hz.

3.

Tape

speed

adjustment

VR

shown

in

fig.

1.

RS-M215

ITEM

MEASUREMENT

&

ADJUSTMENT

Tape

speed

fluctuation

Make

measurements

in

same

manner

as

above

(beginning,

middle

and

end

of

tape),

and

determine

the

difference

between

maximum

and

minimum

values

and

calculate

as

follows:

_

fi—fe

Tape

speed

fluctuation

=

3,000

x

100

(%)

f;

=

maximum

value,

f2

=

minimum

value

|

Standard

value:

Less

than

1%

|

Note:

Please

use

non

metal

type

screwdriver

when

you

adjust

tape

speed

accuracy

on

this

unit.

©

Playback

frequency

response

Condition:

*

Playback

mode

*

Tape

selector

---

Normal

position

Equipment

:

*VTVM

—

*

Oscilloscope

*

Test

tape

---

QZZCFM

1.

Test

equipment

connection

is

shown

in

Playback

frequency

response

chart

fig.

4.

2.

Place

UNIT

into

playback

mode.

3.

Playback

the

frequency

response

test

tape

(QZZCFM).

4.

Measure

output

level

at

315Hz,

12.5kHz,

8kHz, 4kHz,

1kHz,

250Hz,

125Hz

and

63Hz,

and

compare

each

output

level

with

the

standard

frequency

315Hz,

at

LINE

OUT.

5.

Make

measurement

for

both

channels.

6.

Make

sure

that

the

measured

value

is

within

the

range

specitied

in

the

frequency

response

chart

(shown

in

fig.

10).

Fig.

10

@

Playback

gain

Condition:

*

Playback

mode

*

Tape

selector

-+-Normal

position

Equipment

:

*VTVM_

*

Oscilloscope

«

Test

tape

---QZZCFM

@

Erase

current

Condition:

*

Record

mode

*

Tape

selector

--»Metal

position

Equipment:

*VTVM

*

Oscilloscope

©

Overall

frequency

response

Condition:

*

Record/playback

mode

*

Tape

selector

«+

Normal

position

«++

CrO2

position

-+-

Metal

position

*

Input

level

controls

---

MAX

1.

Test

equipment

connection

is

shown

in

fig.

4.

2.

Playback

standard

recording

level

portion

on

test

tape

(QZZCFM

315Hz),

and

using

VTVM

measure

the

output

level

at

LINE

OUT.

3.

Make

measurement

for

both

channels.

Standard

value:

0.4V+1dB

[around

0.42V:

at

test

points

TP5

(L-CH)

and

TP6

(R-CH)]

Adjustment

1.

If

measured

value

is

not

within

standard,

adjust

VR1

(L-CH),

VR2

(R-CH)

(See

fig.

2

on

page

3).

2.

After

adjustment,

check

“Playback frequency

response”

again.

1.

Test

equipment

connection

is

shown

in

fig.

11.

2.

Press

the

record

and

pause

buttons.

3.

Set

the

tape

selector

to

metal

position.

4.

Read

voltage

on

VTVM

and

calculate

erase

current

by

following

formula:

Erase

head

‘2

Voltage

across

both

ends

of

R101

1(Q)

TP4

Standard

value:

160139

ma

(Metal

position)

5.

lf

measured

value

is

not

within

standard,

adjust

as

follows.

Erase

current

(A

VTVM

Oscilloscope

Fig.

11

Adjustment

1.

Open

the

point

(A)

and

short

the

point

(B)

on

the

main

circuit

board

in

the

wiring

connection

diagram

(See page

8).

2.

Make

measurement

for

erase

current.

3.

Make

sure

that

the

measured

value

is

within

the

erase

current

of

140mA

to

170mA.

4.

If it

is

beyond

the

value,

carry

out

the

following

adjustments:

*

If

the

erase

current

is

less

than

140

mA,

short

the

point

(A).

*

If

the

erase

current

is

more

than

170mA,

open

the

points

(A)

and

(B).

Note

1:

Overall

frequency

response

chart

(Normal)

Before

measuring

and

adjusting,

make

sure

of

the

playback

frequency

response

(For

the

method

of

measurement,

please

refer

to

the

——-

Okt

Hz

4kHz 8kHz

+

1dBE~__10OH2z

200H2

—

500H2

"kHz

AkHz

BkHz

B

playback

frequency

response).

fe

a

at

a

Me

“aye

Note

2:

—AdBp---77

=

tbt8

Test

tape

QZZCRA

to

be

supplied

after

July

—708

1980

has

higher

recording

sensitivity

in

the

middle

and

high

frequency

range.

RS-M215

Equipment:

*VTVM

*

AF

oscillator

*

ATT

*

Oscilloscope

*

Resistor

(600

Q)

*

Test

tape

(reference

blank

tape)

+-+-QZZCRA

for

Normal

-+-QZZCRX

for

CrO2

--+QZZCRZ

for

Metal

MEASUREMENT

&

ADJUSTMENT

*

eae

This

chart

indicates

the

standard

values

for

the

new

type

of

QZZCRA

when

in

use.

*

eo)

This

chart

indicates

the

standard

values

for

the

former

type

of

QZZCRA

when

in

use.

—

The

new

type

of

QZZCRA

is

marked

as

shown

in

fig.

13.

New

type

Qs

ZZCRAS

Former

type

Overall

frequency

response

adjustment

by

recording

bias

current

Note

1:

On

RS-M215,

overall

frequency

response

is

adjusted

with

tape

selector

set

at

Normal.

Note

2:

<>}

6000,

-

gs

[O00]

ATT

AF

oscillator

eae

(L-CH)

Record/playback

fai

LINE

IN

Recording

equalizer

is

fixed.

TP

(L-CH)

the

TP2(R-CH)

Playback/

LIne

UT

1.

Make

connections

as

shown

in

fig

14.

R1

(L-CH)

[=

record

mode

2.

Input

a

1kHz,

—24

dB

signal

through

R2

ne

roun

LINE

IN.

Place

the

set

in

record

mode.

3.

Fine

adjust

the

attenuator

to

obtain

0.4V

LINE

OUT

output.

*

Make

sure

that

the

input

signal

level

is

—24+4dB

with

0.4

V

output

voltage.

.

Set

the

tape

selector

to

Normal,

and

load

the

test

tape

(QZZCRA).

.

Adjust

the

attenuator

to

reduce

the

input

signal

level

by

20

dB.

.

Adjust

the

AF

oscillator

to

generate

50Hz,

100Hz,

200Hz,

500Hz,

1

kHz,

4kHz,

8kHz

and

10kHz

signals,

and

record

these

signals

on

the

test

tape.

7,

Playback

the

signals

recorded

in

step

6,

and

check

if

the

frequency

response

curve

is

within

the

limits

shown

in

the

overall

frequency

response

chart

for

normal

tapes

(tig.

12).

(If

the

curve

is

within

the

charted

specifications,

proceed

to

steps

8,

9

and

10.)

If

the

curve

is

not

within

the

charted

specifications,

adjust

as

follows:

Adjustment

@):

Adjustment

®):

When

the

curve

exceeds

the

overall

frequency

When

the

curve

falls

below

the

overall

frequency

response

chart

specifications

(fig.

12)

as

shown

response

chart

specifications

(tig.

12)

as

shown

in

fig.

15.

in

fig.

16.

VIVM

os

cilloscope

For

overall

frequency

response

measurement.

3

VIVM

oscilloscope

For

bias

current

measurement.

Fig.

14

ome

==

-b-----~

$-----~

+

2kHz

4kHz

8kHz

1)

Reduce

bias

current

by

turning

VR101

(L-CH)

and

VR102

(R-CH).

2)

Repeat

steps

6

and

7

to

confirm.

(Proceed

to

steps

8,

9

and

10

if

the

curve

is

now

within

the

charted

specifications

in

fig.

12)

3)

If

the

curve

still

falls

below

the

charted

specifications

(fig.

12),

reduce

bias

current

further

and

repeat

steps

6

and

7.

1)

Increase

bias

current

by

turning

VR101

(L-CH)

and

VR102

(R-CH).

(See

fig.

2

on

page

3.)

2)

Repeat

steps

6

and

7

to

confirm.

(Proceed

to

steps

8,

9

and

10

if

the

curve

is

now

within

the

charted

specifications

in

fig.

12.)

3)

If

the

curve

still

exceeds

the

specitications

(fig.

12),

increase

bias

current

further

and

repeat

steps

6

and

7.

8.

Switch

the

tape

selector

to

CrOz,

change

test

tape

to

QZZCRX,

and

record

50

Hz,

100

Hz,

200

Hz,

500Hz,

1

kHz,

4kHz,

8kHz,

10kHz

and

12.5kHz

signals.

Then,

playback

the

signals

and

check

if

the

curve

is

within

the

limits

shown

in

the

overall

frequency

response

chart

for

CrOz

0”B

tapes

(fig.

17).

Overall

frequency

response

chart

(CrOz,

Metal)

100HZ 200Hz

—_500Hz

4

Shaan

poe

RS-M215

9.

Switch

the

tape

selector

to

Metal,

change

test

tape

to

QZZCRZ,

and

record

50Hz,

100Hz,

200Hz,

500

Hz,

1

kHz,

4kKHz,

8kHz,

1OkKHz

and

12.5kHz

signals.

Then,

playback

the

signals

and

check

if

the

curve

is

within

the

limits

shown

in

the

overall

frequency

response

chart

for

metal

tapes

(fig.

17).

10.

Confirm

that

bias

currents

are

approximately

as

follows

when

the

tape

selector

is

set

at

different

positions.

ELECTRICAL

PARTS

LOCATION

E5

*

Read

voltage

on

VTVM

and

calculate

bias

current

by

following

formula:

Value

read

on

VT

VM

(V)

10

(Q)

Bias

current

(A)

=

around

410A

(Normal

position)

around

545A

(CrO2

position)

\

measured

at

TP1

(L-CH)

and

TP2

(R-CH)

around

800uA

(Metal

position)

@®

Overall

gain

_

Test

equipment

connection

is

shown

in

fig.

18.

Condition:

2.

Place

UNIT

into

record

mode,

and

tape

selector

to

normal

Record/playback

head

i

*

Record

/playback

mode

position.

:

+

Input

level

controls

---

MAX

3.

Supply

1kHz

signal

(—24

dB)

from

AF

oscillator,

through

pare

et

*

Standard

input

level;

ATT

to

LINE

IN.

ele

LINE

IN

Tee

MN”

Test

tape

MIC

«eeeeees

—72+4dB

4.

Adjust

ATT

unti!

monitor

level

at

LINE

OUT

becomes

Record/playbacky

ie

guy

LINE

IN.--

-24+4¢B

OAV.

me

Equipment:

5.

Using

test

tape,

make

recording.

od

—fo

O_

7

=

VTVM

.

AE

cscillator

6.

Playback

recorded

tape,

and

make

sure

the

value

at

LINE

ie

tse

Playback

mode

yTym

Oscilloscope

i

Note:

Cord

connection

using

this

nylon

*

ATT

*

Oscilloscope

OUT

on

VTVM

becomes

0.4V.

Fig.

18

coupler

(E24)

requires

a

special

tool.

.

P

7.

If

measured

value

is

not

0.4,

adjust

VR5

(L-CH),

VR6

in

coupler

(E24)

*

Resistor

(600

Q)

*

Test

tape

8

(reference

blank

tape)

«++

QZZCRA

for

Normal

(R-CH)

(See

fig.

2

on

page

3).

5

Nylon

coupler

.-

Copper

plate

.

Repeat

from

step

(2)

i

(E24)

ve

Clamping

@

Fluorescent

meter

Note:

Condition:

RS-M215

cassette

decks

are

available

with

VR202

or

without

VR202.

For

models

with

VR202,

lighting

|

*

Record

mode

adjustments

at

—20dB

and

OdB

must

be

made.

For

those

without

VR202,

lighting

adjustment

is

*

Input

level

controls

---

MAX

necessary

only

at

OdB.

If

—20dB

lighting

adjustment

is

required

for

models

without

VR202,

replace

*

Tape

selector

R202

with

an

appropriate

resistor.

-

Normal

position

1.

Test

equipment

connection

is

shown

in

fig.

18.

Sees

2.

Supply

1kHz

signal

(—24

dB)

to

the

LINE

IN

then

press

the

record

button.

Se

3.

Adjust

the

ATT

so

that

the

output

level

at

LINE

OUT

becomes

0.4

V

(The

input

level

at

this

condition

*VTVM_

*

AF

oscillator

ef

id

the’

standardinput

level)

*

ATT

*

Resistor

(6002)

fii

nad

ed

tapas

sro

iat

4.

Adjustment

at

“—20dB":

A.

Adjust

the

ATT

so

that

the

input

level

is

—20dB

below

standard

recording

level.

B.

Adjust

VR202

so

that

the

—20dB

segment

-

lights

up

in

the

—20

+0.8dB

range

CL-CH

cS]

UVMAUEIUVTUTTITEELTITUET

TTT

TET

only)

(See

fig.

19).

wae

5,

Adjustment

at

“OB”:

a

74

2

29

00072

DE

se

at

A.

Adjust

the

ATT

so

that

the

output

level

at

Fig.

19

LINE

OUT

becomes

0.4

V.

A

LE

RL

Part

Name

&

Description

(The

input

level

at

this

condition

is

termed

shasesevaassana

sagen

saassvasss

taett

LOB)

DA

|SJASS

AG

Power

Gard

r

aT

TCM

POUNPUNPUNP

VAP

UNE

te

20

(FI)

6°4+2+0°*

2

O06

&

x

For

all

European

areas

except

United

Kingdom.

B]

A

|

QFC1205M

"

%

For

United

Kingdom.

|

the

standard

input

level.)

B.

Adjust

VR201

so

that

the

+1dB

segment

+

:

lights

up

in

the

0

£0.2dB

range

of

the

Fig.

20

E?

QTD1164

|

Cord

Clamper

(for

AC

Power

Cord)

standard

input

level

(See

fig.

20).

Eg

QTS1531

|Shield

Plate

6.

Repeat

twice

between

steps

(5)

and

(6)

above.

Seve

(for

AC

Power

Transformer)

7.

Adjust

ATT

and

check

that

all

se

ments

li

hts

PI

UTIUTAUIASEATELERAS

ELS

IASEEUSIEPIST

Eri

triers

E9

XTN3+10B

Screw

3X10

si

L

SHUNAUUUUTUNUT

AUG

U

CHEAT

UTLE

REPEL

ACEMENT.

PARTS

LIST.

E10

|XTN3+16B

Screw

43X16

up

when

an

input

signal

level

is

increased

to

10.dB

higher

than

the

standard

input

level

(See

20

PEAR)

6

©

4+

2+

0°

2

10

<6

B=

11008)

fig.

21).

Important

safety

notice

Components

identified

by

A,

mark

have

special

characteristics

important

for

safety.

When

replacing

any

of

these

components,

use

only

manufacturer’s

specified

parts.

|

Ell

XWG3

Washer

E12

XSN3+6S

'Screw

H3X6

E13

XWA3B

Washer

E14

QML3711

Recording

Lever

ee

;

ae

dog:

TPS

(L-CH)

®

Dolby

NR

circuit

1.

Test

equipment

connection

is

shown

in

fig.

22.

ICLL-CH)

oe

RCH)

viv

a

E15

BS1132

Recording

Wi

Condition:

2.

Place

UNIT

into

record

mode,

set

the

Dolby

NR

switch

ee

For

hare

eee

—

lei

sro

Pincord

iti

IN

to

obtain

E17

A

|

QTF1054

Fuse

Holder

+

Record

mode

to

OUT

position

and

supply

to

LINE

ETHICAL

PATS

NR

switch

---

IN/OUT

—34.5dB

at

TPS

(L-CH),

TP6

(R-CH)

(frequency

oe

eseparie

oo

ee

lee

*

Dolby

NR

switc

/OU

El

QWwY4122z

Record/Playback

Head

E19

QTS1532

Shield

Case

«

Input

level

controls

---

MAX

5

kHz).

AFostiator—

ATT

E2

QWY21382

Erase

Head

QMA4060

Volume

Angle

;

3.

Confirm

that

the

value

at

IN

position

is

8(+2.5)dB

£3

|

OMA4061

Center

Angle

Equipment

:

greater

than

the

value

at

OUT

position

of

Dolby

NR

.

E4

QG01798

Push

Button

(for

Power

ON/OFF)

|E21

QNQ1004

Nut

*VTVM

+

AF

oscillator

aiiteh

Fig.

22

E5

QKJ0437

Cord

Clamper

(for

Cords)

£22

QNQ1070

"

«ATT

*

Oscilloscope

,

Geis

“Silver

Type”

E23

QJT1041

Check

*

Resistor

(600

Q)

QKJ0437K

»

A

|

QJT1079

Nylon

Coupler

“Black

Type”

|XTN3+12B

‘Screw

43X12

[6]

«Important

safety

notice

For

—20dB

Components

identified

by

A

mark

have

special

characteristics

important

for

safety.

indication

(FL

METER)

When

replacing

any

of

these

components,

use

only

manufacturer's

specified

parts.

adjustable

type.

——

wm

es

Ee

See

ree

ares

oe

ee

eye

ee,

=

=.

ae os

pen

=

Ses

a

coe

HEADPHONES

AMP

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kes

PB.

EQ/MIC

AMP

ae

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DOLBY

NR

si-9

REC.

EO

AMP

Sci

|

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S$3-1

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|

ddd

DOO

bod

5

;

:

|

a1

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1

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as a7

ag

1C3-1

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(T)

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{

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|

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2SD661(T

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OO

NE646B

5

2SD636(S)

NJM4556D(1/2)

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\

LIN

R79.

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me

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|

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|

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|

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|

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bad

;

|

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|

2SB745(T.U)

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2SD636(S)

NJM4556D(1/2)

|

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/PLAYBACK

HEAD

«

§

we

vR2

20K(8);

Q15

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clé

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(MAI61)

IK

2SD636(S)

2SB641(R)

cl

MUTING

$4-4

|

sI-13

Ly

—___t

=

S,

|

84-5

CONNECTION

Q102

POINTIA)

2SC1846(R)

10.8v

7

37

s1-14

CUE/REVIEW

{

R199

100

pad

For

—20dB

eo)

as

.

|

indication

(FL

METER)

TP

>

“9

~~

“Pe

=

ra

ov

O

me

ai

pee

|

mo

»

FOR

|

sew

a9

jv"

R102

CONNECTION

+

R23

10K

if

.

470

POINT(B)

iT

|

ir

@)

|

Cs

eas

pa!

clot

+b

cioz

=

°

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0.022

|

loor

TT

100

120

10.8v

|-o.3v

-oav

;

*

For

United

Kingdom

se

tant

nigel

ae

le

ay

=

7

Sera

ee

ae

|

L101

sito

Al

|A

A

a

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[

A

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ae

Dog

A,

ping

15K

oes

1c201

|

ERASE

HEAD

|

<n

|

Bhy-

”

Pa

fe

ie

FL

METER

i

~

6

®

R203

E

;

|

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&

zit

ao

bid

4

68K

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Mica

(ea

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|

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.

680

¢

=

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|

eye

R204

pecan

|

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C103.

.

D103

—

D106

aK

D201

iszars

Male

Ww

|

0,018

Q103

SMIAOZA,

R211

|

(SMI12)

Te

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0209

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ooo

*

180

|

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A

‘

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R200

"

ROOT

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F501

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Fé

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pa mn

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fA

101

ray

|

:

2SD592(NCR)

AMO)

130"

|

__BIAS.

OSC.

REGULATED

POWER

SUPPLY

LEVEL

METER

DRIVE

_

. ”

|

!

Aac

Power!

oe

ine

ee

|

L_.

:

;

*

For

all

European

areas

except

United

Kingdom

NOTES:

¢

$1-1—S1-4

......

Record/Playback

select

switch

(shown

in

playback

position).

©

$2-1—S2-2

......

Input

select

switch

(shown

in

LINE

IN

position).

*

$3-1—S3-2

......

Dolby

IN/OUT

select

switch

(shown

in

OUT

position).

¢

$4-1—S4-5

......

Tape

select

switch

(shown

in

normal

position).

AC

power

voltage

select

switch.

*

For

all

European

areas

except

United

Kingdom.

Power

ON/OFF

switch

(shown

in

OFF

position).

Cue/Review

muting

switch

(shown

in

off

position).

0

SB.

uiccetieosessnees

Playback

muting

switch

(shown

in

off

position).

-Playback

gain

adjustment

VR.

Input

level

controls.

©

VR5,6

oo...

Recording

gain

adjustment

VR.

*

VR101,

102

.Bias

current

adjustment

VR.

e

VR201

0...

FL

meter

adjustment

VR

(for

OdB

indication)

©

VR202

............

FL

meter

adjustment

VR

(for

—20dB

indication).

«

Connection

points

(A)

and

(B)......

For

erase

current

adjustment.

«

Resistance

are

in

ohms

(Q),

1/4

watt

unless

specified

otherwise.

K=

1,0002,

M

=

1,000KQ.

¢

Capacity

are

in

microfarads

(«F)

unless

specified

otherwise.

P

=

Pico-farads.

*

The

mark

(¥)

shows

test

point.

e.g.

¥

=

Test

point

1.

*

(==>)

this

arrow

indicates

the

flow

of

the

playback

signal.

©

(mmm

)

this

arrow

indicates

the

flow

of

the

recording

signal.

*

Ail

voltage

vatues

shown

in

circuitry

are

under

no

signal

condition

and

record

mode

with

volume

control

at

minimum

position.

For

measurement,

use

VTVM.

¢

Important

safety

notice

Components

identified

by

A

mark

have

special

characteristics

important

for

safety.

When

replacing

any

of

these

components,

use

only

manufacturer's

specified

parts.

EQUIVALENT

CIRCUIT

1C201

AN6870

i

@

Se

(TOP

VIEW)

3

TRANSISTORS

|

ws

(SIDE

VIEW)

ws

(=

s

bax)

°

dia

8

c

E

na

aise!

cw

088)

Ic1,

2

DOLBY

B-TYPE

CIRCUIT

INTEGRATED

W112

13141

SPECIFICATIONS

—

*

Input

level

controls---

MAX.

Playback

S/N

ratio

Test

tape

---

QZZCFM

Greater

than

45dB

(without

NAB

filter)

Overall

distortion

Test

tape

Less

than

4%

*+»QZZCRA

for

Normal

+

QZZCRX

for

CrOz

++

QZZCRZ

for

Metal

Overall

S/N

ratio

Greater

than

43

dB

Test

tape

---

QZZCRA

NOTES:

RESISTORS

ERD

---

Carbon

ERG

---

Metal-oxide

ERS

---

Metal-oxide

ERO

---

Metai-film

ERX

---

Metal-film

ERQ---

ERC.

ERF..--

Solid

Cement

Fuse

type

metallic

CAPACITORS

ECBA

------

Ceramic

ECGO

--.--

Ceramic

ECKO---.-

Ceramic

ECC

.---

Ceramic

ECF

Ceramic

Polyester

fiim

ECQE..-.--

Polyester

film

REPLACEMENT

PARTS

LIST

Important

safety

notice

ECQF

«++.

Polypropylene

ECEL

«-.--

Electrolytic

N.-...

Non

polar

electrolytic

enka

y

Polystyrene

+

Tantalum

Components

identified

by

A

mark

have

special

characteristics

important

for

safety.

When

replacing

any

of

these

components,

use

only

manufacturer's

specified

parts.

ERD25FJ681

R201

‘

ERD25TJ153

R202.

@

'

ERD25FJ472

For

ali

European

areas

type.

R203,

204

|

ERD25TJ683

R205,

206

|

ERD25TJ473

R207,

208,

209

|

ERD25TJ105

R211,

212

|

ERD25FJ181

R213

ERD25FJ103

R214

_ERD25FJ681

RESISTORS

ERD25FJ100

R3,4

|

ERD25FJ562

R5,6

ERD25TJ104

R7,8

ERD25FJ101

R9,

10

ERD25TJ104

R11,12

|

ERD25TJ823

R13,14

ERD25FJ101

R15,16

|

ERD25TJ184

R17,18

|

ERD25FJ392

R19,20

|

ERD25FJ272

R21,22

|

ERD25FJ562

R23,24

|

ERD25FJ332

R25,26

|

ERD25TJ473

R27,28

|

ERD25FJ392

R29,30

|

ERD25FJ102

R31,32

|

ERD25TJ474

R33,

34

|

ERD25TJ473

R35,36

|

ERD25FJ332

R37,

38

|

ERD25TJ105

R39,40

|

ERD25TJ274

R41,42

|

ERD25TJ184

R43,44

|

ERD25FJ181

R45,46

|

ERD25FJ272

R47,48

|

ERD25FJ102

R49,50

|

ERD25TJ683

R51,52

|

ERD25TJ224

R53,54

|

ERD25FJ822

R55,56

‘|

ERD25FJ681

R57,58

|

ERD25FJ272

R59,60

|

ERD25FJ102

R61,62

|

ERD25FJ471

R63,64

|

ERD25TJ223

R65,66

|

ERD25FJ102

R67,68

—

ERD25FJ3R3

R69,70

|

ERD25TJ333

R71,72

|

ERD25TJ273

R73,74

|

ERD25TJ124

R75,76

|

ERD25FJ151

R77

ERG2ANJ560

R78

ERDSOFJ270

R79,80

|

ERG12ANJ820

R81,

82

ERD25FJ102

R83,

84

ERD25FJ222

R85

ERD25FJ102

R90

ERD25TJ563

R93

ERD25FJ102

R94

ERD25TJ153

R95

ERD251J223

R101

;

ERD25FJ1RO

R102

ERD25FJ471

R103

ERD25FJ561

R104

ERD25FJ562

R105

ERD25FJ100

R106

ERD25FJ562

R107

ERD25FJ100

R108

ERDSOFJ101

R109

ERD25FJ101

R110

ERG2ANJ101

R112

ERD25FJ821

except

United

Kingdom.

*

For

—20dB

indication

(FL

METER)

nonadjustable

QSSE203

$2,3

QES1544

$4

QES1490

S5

©

A]

QSR1409H

$6

A’

QSWI117

:

QSB0251i

TL

GA!

QLPDS2EKC

A

|

QLPA61EKC

*

For

United

Kingdom.

XBAQ0007

A

Ref.

No.

|

Part

No.

SWITCHES

VARIABLE

i

ECEAIAS101

RESISTORS

|

(67

ECEA2AS3R3

vR1,2

|

EVNK4Aa00B24

|C69,70

|

ECKD1H391KB

VR3,4

|

QVH3AA067854

|C71

ECKD1H472MD

VR5,6

EVNK4AA00B54

For

~20dB

indication

(FL

VR101,

102

|

EVNK4AA00B15,

METER)

adjustable

type.

VR201

—/

EVNK4AAQ0B24

|C101,102

|

ECCDIM101KD

VR202

EVNK4AA00B14

{C103

ECQP1183JZ

%For

—20dB

indication

(FL

|

C104

ECFDD153KXY

METER)

adjustable

type.

C105

ECEA1ES101

C106

ECFDD822KVY

SAPAGITORS

§=—

10107,

108

|

ECQV05104JZ

C1,2

ECEA25M4R7R

1C109,110

|

ECEAICS471

C3,4

ECFOD102KVY

|C111,

112

C5,6

ECFDD102KVY

A

|

ECEAICS102

C7,8

|

ECQM1H183KZ

|C201,202

|

ECEA2AS010

C9,

10

ECEAIHS100

|

C203

ECFOD473KXY

11,12

|

ECEAQUS471

—-

C205,

206]

ECKD1H223ZF

C13,14

|

ECEA1ES220

C15,16

|

ECKD2H121KBL

|

TRANSISTORS

C17,18

|

ECFDDIOZKWY

|Q1,2

2SB745T

C19,20

|

ECEAIHNO10

=

03,4

2SD661T

€21,22

|

ECFDD392KVY

05,

6,7,8,9,

10

C23,24

|

ECQM1H472J2

|

2506368

C25,26

ECEALHS100

«013

2SB641R

(27,28

|

ECQM1H273/z

015

2SD636S

29,30

|

ECEASOMR33R

|

Q101

2SD592NCR

€31,32

|

ECQVvO5104s2

+

Q102

|

25C1846-R

C33,34

-

ECEA1HS100

‘|

Q103

|

25A885-0

C35,36

|

ECFDD473KXY

37,38

|

ECQM1H562J2

Se

iieas

39,40

|

ECEA1HS100

C41,

42,

43,

44

MAI61

C45,46

|

ECEA2ASO19

~—-|

9102

RVDIN4748

C47,48

|

ECEAIHS100

—_|

0103,

104,

105,

106

C49,50

|

ECQM1H333JZ

A|SM112

51,52

|

ECFDDg22Kvy

|

201,202

|

MA161

C53,54

|

ECFDD273Kxy_

|

9203

MA1047LF

(55,56

ECFDD333KXY

|

wwreGRaTED

(57,58

|

ECEA1HNO10

CIRCUITS

C59,60

—

:

ECEA2ASO10

C61

|

ECEALAS331

i

:

ce

C62

ECEAIASIOZ

|

coy

Aiueda

ECKD1H2232F

For

ail

European

areas

except

United

Kingdom.

TRANSFORMER

For

all

European

areas

except

United

Kingdom.

Part

Name

&

Description

Slide

Switch

(Record/Playback

Selector)

Lever

Switch

(Input

Selector

and

Dolby

IN/OUT)

Lever

Switch

(Tape

Selector)

Rotary

Switch

(AC

Power

Selector)

Push

Switch

(Power

ON/OFF)

Leaf

Switch

(Cue/Review

and

Playback

Muting)

AC

Power

Transformer

”

COILS

L1,2

QLQX0343K

‘Bias

Trap

Coit

13,4

!

SLM1Z19

:

MPX

Filter

Coil

L5,6

"QLQX0332K

Peaking

Coil

L101

,

QLBO198K

:

Bias

Oscillation

Coil

JACKS

Jl

|

QUAO249C

“Headphones

Jack

12,3

QJA0257H

Microphone

Jack

J4

QJS1954H

Record/Playback

Socket

FUSES

Fuse

(T

400mA)

8

1

6

5

4

3 2

CIRCUIT

BOARD

AND

WIRING

CONNECTION

poo

i

|

$5:

AC

POWER

VOLTAGE

|

A

LINE

OUT

P.

To

MECHANISM

CHASSIS

TRANSFORMER

OER

LEE

MSE

ORME

<A

CIRCUIT

BOARD

;

a

8

_

For

—20dB

\

0103

a102

a7

a13

indication

(FL

METER)

NS

alae

fae

BIR}

280638)

FSBEAA)

adjustable

type.

XY

ref

tc

Hf

‘\

fh

S7:

CUE/REVIEW

=

S8:

PLAYBACK

Six

:

MUTING

SWITCH

MUTING

SWITCH

RECORD/PLAYBACK

‘Y

05,6

=

Cte

TQ

cree

|

HEAD

<

ASP

8ahi)

5 5

-----

B

GRY

%

S6:

AC

POWER

ON/OFF

SWITCH

|

S6:

AC

POWER

;

*

For

United

Kingdom

ON/OFF

SWITCH

.

“*

For

all

European

areas

except

United

Kingdom

FL

METER

CIRCUIT

BOARD

C

it

LY

UNUM4556D

Fee)

eet

:

44

PSB

IE

TUN:

D

co

a

ar

PSDGGUT),

:

AN6807

ERASE

HEAD

LED

CIRCUIT

BOARD

NOTES:

i

L.

BLU---

Light

Blue

rea

E

MAIN

CIRCUIT

BOARD

i

NIL

«-

No

Color

Mark

For

—20dB

indication

(FL

METER)

A

'

|

ORG

.-.--

Orange

adjustable

type.

|

CONNECTION

POINT(A}

PNK...

Pink

A

CONNECTION

POINT(Bi

aig

RED

.....-

Red

LINE

IN

ENG

\

}

: P

28N6611T}

2SD592(NCA}

SLD

..-..-

Shield

Wire

VLT

.-----

Violet

ie

---White

Yellow

NOTES:

©

The

circuit

shown

in

seis

on

the

conductor

is

+B

(bias)

circuit.

©

The

circuit

shown

in

:

on

the

conductor

is

—B

(bias)

circuit.

©

The

circuit

shown

in

*

"on

the

conductor

side

indicates

printed

circuit

on

the

back

side

of

the

printed

circuit

board.

¢

Values

indicated

in

(__—}

are

DC

voltage

between

the

ground

and

electrical

parts.

F

¢

The

voltage

indicates

are

measured

during

record

mode.

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