Sony TC-K333ESA Bedienungsanleitung

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1

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TC-K333ESA/K9S0ES

SERVICE

MANUAL

*

Dolby

noise

reduction

and

HX

Pro

headroom

extension

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

HX

Pro

originated

by

Bang

&

Olufsen.

“DOLBY”,

the

double-D

symbo!

DO

and

"HX

PRO”

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

SPECIFICATIONS

Recording

system

4-track

2-channel

stereo

Fast

winding

time

Approx.

90

sec.

(with

Sony

C-60

cassette)

Bias

AC

bias

Heads

Erasing

head

x

1

(S&F

head)

Recording

head

x

1

(LA

head)

Playback

head

x

1

(LA

head)

Motors

Capstan

motor

x

1

(direct

-drive

linear

torque

BSL

motor)

Reel

motor

x

1

(DC

motor)

Type

IV

(Sony

Signal-to-noise

ratio

(at

peak

level)

Type

Il

Type

|

Metai-S)

(Sony

UX-S)

(Sony HF-S)

61

dB

59

dB

57

dB

Measured

at

peak

level

weithted

without

NR.

The

S/N

is

improved

by

about

15

dB

at

500

Hz

and

by

about

20

dB

about

1

kHz

with

Dolby-C

NR

on,

and

by

5

dB

at

1

kHz

and

by

10

dB

about

5

kHz

with

Dolby-B

NR

on.

Cassette

(Dolby

NR

OFF)

1.3%

(with

Sony

Metal-S

250

nWb/m,

315

Hz,

3rd

H:D.)

Frequency

response

(Dolby

NR

OFF)

Type

IV

cassette

15

-

22,000

Hz

(+3

dB,

IEC)

(Sony

Metal-S)

15

-

16,000

Hz

[+3

dB

(-4dB

recording)]

Type

Il

cassette

15

-

20,000

Hz

(#3

dB,

IEC

(Sony

UX-S)

Type

|

cassette

15-4

Hz

(+3

dB.

|

(Sony

HF-S)

8,000

Hz

(+3

dB,

IEC)

+

0.04%

W.Peak

(IEC)

0.022%

W.RMS

(NAB)

+

0.065%

W.Peak

(DIN)

Line

inputs

Sensitivity

0.16

V

(phono

jacks)

Input

impedance

47

k

ohms

CD

DIRECT

INPUT

Input

impedance

47

k

ohms

Harmonic

distortion

Wow

and

flutter

Inputs

Model

Name

Using

Similar

Mechanism

TC-K333ESG

Tape

Transport

Mechanism

Type

AEP

Model

TC-K990ES

E

Model

TC-K333ESA

TCM-200D10

Outputs

Line

outputs

(phono

jacks)

Rated

output

level

0.5

V

at

a

load

impedance

of

47

k

ohms

Load

impedance

Over

10

k

ohms

Output

level

0-3

mW

ata

load

impedance

of

32

ohms

AEP

model:

|

220

-

230

V

AC,

(or

240

V

AC

adjustable

by

Sony

personnel),

50/60

Hz

E

model:

120,

220,

or

240

V

AC

adjustable,

50/60

Hz

Power

consumption

31

W

Dimensions

Approx.

470

x

140

x

380

mm

(w/h/d)

(185%

x

55%

x

15

inches)

including

projecting

parts

and

controls

Approx.

12.0

kg

(26

lbs

8

oz)

Model

for

other

countries:

Approx.

11.2

kg

Headphones

(stereo

phone

jack)

General

Power

requirements

Weight

Supplied

accessories

Audio

connecting

cords

(2)

Screws

(8)

Wireless

remote

commander

(1)*

Sony

SUM-3(NS)

batteries

(2)*

*

Not

supplied

with

model

for

European

countries

Design

and

specifications

are

subject

to

change

without

notice.

Note

This

appliance

conforms

with

EEC

Directive

87/308/EEC

regarding

interference

suppression.

STEREO

CASSETTE

DECK

SONY.

TC-K333ESA/K990ES

TABLE

OF

CONTENTS

Section

Title

Page

Specifications

Ge?

Jb

Settee:

eae

ve

Seg

ghia

OL

OL

WS

BOS

Sl

WYO

S.

BLES.

Be:

-orkeNeve

lt

Servicing

Note

SW

gi

erate

se

eRe

here.

AOS

wiles

len

elie,

Siieiie!

Solel

3)

euahies

Oho.

oer

18

2

Model

Identification

#0

MGS

S080

<0

BD:

WO

(O Oc

le

oreo:

ee

corer

ere

6

ce:

3

SECTION

1.

GENERAL

--------

"eee

ee

eee

cece

eeee

4

SECTION

2.

DISASSEMBLY

...........-.--.02205-

8

SECTION

3.

ADJUSTMENTS

3-1.

Mechanical

Adjustments

--+--+++++++eeeeee-

10

3-2.

Electrical

Adjustments

-----+-+++s+re

erro

ees

12

SECTION

4.

DIAGRAMS

4-1-1.

10502,

505

(CX20188)

Pin

Functions

-----

17

4-1-2.

IC601

(M50940-313SP)

Pin

Functions

-----

18

4-1-3.

IC801

(M50964-226SP)

Pin

Functions

-----

19

4-1-4.

1C881

(HD404240A31S)

Pin

Functions

----:

20

4-2.

Circuit

Boards

Location

-----+-+++++++++e:-

20

4-3,

IC

Block

Diagrams

SSL

en

ie

ee

es

een

Sw

seehe

Oe

arele

6

®u8

ec

ee

21

4-4.

Semiconductor

Lead

Layouts

--+--+-+-+++-++:

22

4-5.

Block

Diagram

--+++

sees

e

sees

eee

eee

e

eee

ees

23

4-6.

Printed

Wiring

Boards

(Audio

Section)

27

4-7.

Schematic

Diagrm

(Audio

Section)

--------:

31

4-8.

Schematic

Diagrm

(Syscon

Section)

-----:--

35

4-6.

Printed

Wiring

Boards

(Syscon

Section)

---

39

SECTION

5.

EXPLODED

VIEWS

5-1.

Overall

Section

--+++

ccs

rere

tere

ee

eee

ee

eee

43

5-2.

Front

Panel

Section

--++-++++ct

eerste

ee

eeee

44

5-3.

Chassis

Section

-s+crr

creer

cece

eee

ee

eeees

45

5-4.

Mechanism

Section

-1

(TCM-200D10)

--------

46

5-5.

Mechanism

Section

-2

(TCM-200D10)

--------

47

SECTION

6.

ELECTRICAL

PARTS

LIST

-::::---

48

SERVICING

NOTE

Flexible

Circuit

Board

Repairing

@

Keep

the

temperature

of

the

soldering

iron

around

270°C

during

repairing.

®

Do

not

touch

the

soldering

iron

on

the

same

con-

ductor

of

the

circuit

board

(within

3

times).

®

Be

careful

not

to

apply

force

on

the

conductor

when

soldering

or

unsoldering.

Notes

on

chip

component

replacement

@®

Never

reuse

a

disconnected

chip

component.

®@

Notice

that

the

minus

side

of

a

tantalum

capacitor

may

be

damaged

by

heat.

TC-K333ESA

Model

Checking

the

Operating

Voltage

*

Before

operating

the

unit,

be

sure

that

the

operating

voltage

of

your

unit

is

identical

with

that

of

your

local

power

supply.

120,

220

or

240

V

AC

adjustable,

50/60

Hz

A

voltage

selector

is

located

on

the

rear

panel.

lf

the

selector

must

be

reset,

disconnect

the

AC

power

cord

and

set

the

selector

to

the

appropriate

voltage.

Other

countries

VOLTAGE

selector

VOLTAGE

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

For

higher

quality

recording/playback

+

The

Dolby

HX

PRO*

system

which

improves

the

linearity

of

the

tape’s

high-range

response

during

recording.

¢

Bias

and

recording

level

calibration

which

ensures

optimum

recording

conditions

to

bring

out

the

best

in

every

tape.

«

Three-head

system

(separate

recording,

playback

and

erase

heads)

which

allows

you

to

instantly

check

the

recorded

sound

while

recording

is

in

progress.

+

Ceramic

cassette

holder

for

improved

stability

of

tape

running

during

playback

and

recording.

*

Professional-level

deck

design

for

high

mechanical

stability

and

maximum

performance.

For

your

convenience

«

The

AMS

and

Memory

Play

functions

which

provide

easy

access

to

a

desired

selection.

«

Timer-activated

playback

and

recording

through

the

use

of

an

optional

timer.

For

easier

operation

+

Easy-to-read

linear

counter

which

shows

the

elapsed

recording

or

playing

time.

MODEL

IDENTIFICATION

—

Specification

Label—

SONY.

9

wove,

no

LZ

TE-KS33ESA

TC-K990ES

STEREO

CASSETTE

DECK

LMM

SERIAL

NO.

MADE

IN

JAPAN

TC-K333ESA/K990ES

AEP,

Germany

Model:

AC:

220—230V

~

50/60Hz

E

Model:

AC:

120,

220—240V

~

50/60Hz

TC-K333ESA/K990ES

SECTION

1

GENERAL

This

section

is

extracted

from

instruction

manual.

\dentifying

the

Front

Panel

-_

For

details,

refer

to

the

page

number

indicated

in

parenthesis

.

POWER

switch

[2]

AMS

(Automatic

Music

Sensor)

buttons

(24)

[3]

Remote

control

sensor

You

can

remotely

control

this

cassette

deck

with:

—

The

supplied

remote

commander.

—

Aremote

commander

that

came

with

a

Sony

amplifier

or

receiver

if

it

has

the

[i

mark

and

cassette

deck

control

capability.

—

An

optional

Sony

remote

commander

with

the

f@

mark

and

cassette

deck

control

capability.

[4]

LINEAR

COUNTER

(28)

[5]

Counter

buttons

RESET

button

(28)

MEMORY

button

(26,

28)

DISPLAY

MODE

button

(20)

[6]

Dolby

HX

PRO

button

(48)

CALIBRATION

button

(42)

INPUT

button

(30)

[9]

PEAK

PROGRAM

METER

(34)

REC

(recording)

LEVEL

control

(30,

34)

(Continued

on

next

page.)

Identitying

the

Front

Panel

For

details,

refer

to

the

page

number

indicated

in

(parenthesis)

.

(Continued

from

previous

page.)

[11}

MONITOR

switch

(36)

REC

EQ

CAL

(recording

equalizing

calibration)

switch

(LOW,

NORMAL,

HIGH)

(44)

REC

(recording)

LEVEL

control

for

calibration

(38,

42)

BIAS

control

(38,

42)

[15]

DOLBY

NR

(noise

reduction)

/MPX

FILTER

switch

(20,

30)

Cassette

holder

@

OPEN/CLOSE

button

Tape

operation

buttons

and

indicators

<4

(rewind)

button

@

(stop)

button

Bb

(play)

button

and

indicator

PP

(fast-forward)

button

@

REC

(recording)

button

and

indicator

4§

PAUSE

button

and

indicator

©

REC

MUTE

(record

muting)

button

(50)

PHONES

jack

(stereo

phone

jack)

(22)

PHONE

(headphones)

LEVEL

control

TIMER

switch

(54)

Identifying

the

Parts

(Except

for

European

model)

PROT

STOP.

START

STANOB

on oe

ee

CASSETTE

DECK

ff

|

REMOTE

Commander

The

controls

on

the

REMOTE

commander

are

identical

in

function

and

operation

to

those

with

the

same

name

on

the

main

unit.

For

details,

refer

to

the

page

number

indicated

in

(parenthesis).

[1]

&

(open/close)

button

[2]

DISPLAY

button

[3]

Counter

buttons

[4]

MONITOR

button

[5]

Tape

operation

buttons

(6]

CD

(Compact

Disc)

buttons

for

controlling

Sony

CD

players

fl

(pause)

button

4

/

PPI

buttons

for

locating

selections

sequentially

CD

SYNCHRO

buttons

for

synchronized

recording

with

a

Sony

CD

player

TC-K333ESA/K990ES

WEL

le

RU

me@)cuiieie

at-lereygeliale

=TrTow-laleM

a{ctole)

cel

lavem

M=av)|

Oriilelechirey

a

There

are

many

different

types

of

cassettes

on

the

market,

each

with

varying

magnetic

properties.

Although

your

unit

is

equipped

with

the

ATS

(Automatic

Tape

Selection)

system

which

sets

the

appropriate

equalization

characteristics

and

bias

current

for

each

tape

type,

an

additional

calibration

adjustment

can

often

produce

even

better

results.

Use

the

bias

current

and

recording

level

calibration

function

to

obtain

the

optimum

recording

conditions

for

your

tape.

CALIBRATION

REC

LEVEL

Adjusts

bias

current

within

+

20%

Adjusts

recording

level

within

t3dB

Bias

calibration

Choosing

the

optimum

bias

current

for

a

tape

ensures

minimum

distortion

and

flat

frequency

response.

Lowering

the

bias

current

boosts

high-frequency

response,

but

also

results

in

higher

distortion.

Raising

the

bias,

on

the

other

hand,

reduces

distortion,

but

also

dampens

high-frequency

response.

Optimum

bias

is

thus

obtained

when

the

bias

current

and

high-frequency

response

are

well

balanced.

Bias

reduced

(—)

High-

frequency

response

drops

x)

Output

(level

in

dB)

Bias

increased

(+)

Frequency

in

Hz

«

If

the

bias

current

is

higher

or

lower

than

the

optimum

setting

for

a

certain

tape,

the

frequency

response

changes

as

shown

in

the

Chart

in

Fig.

EJ

.

Changing

the

bias

can

thus

be

used

to

tailor

the

response

to

your

liking,

for

example

by

slightly

emphasizing

the

upper

or

lower

end.

*

The

frequency

response

of

metal

tapes

is

much

less

affected

by

changes

in

the

bias

current

than

other

tape

types.

With

some

tapes,

the

adjustment

range

of

this

deck

(+20%)

may

therefore

not

be

sufficient

to

cover

every

possible

requirement.

Recording

level

calibration

Even

when

the

recording

level

is

adjusted

correctly,

using

a

tape

with

low

sensitivity

will

result

in

a

low

playback

level.

The

REC

LEVEL

calibration

control

allows

you

to

compensate

for

sensitivity

differences

among

tapes

to

equalize

both

recording

and

playback

levels.

This

is

especially

important

when

using

the

Dolby

NR

system,

since

it

is

most

effective

when

recording

and

playback

levels

are

the

same.

TC-K333ESA/K990ES

Making

an

Optimum

—

atsvore)

gel

[are]

1

Insert

the

cassette

to

be

used

for

recording.

2

Press

CALIBRATION.

Press

@,

then

ff

or

B>

to

activate

the

recording

test

tone.

a)

Playback

level

for

an

8-kKHz

signal

b)

Playback

level

for

a

400-Hz

signal

Note

*

The

sound

cannot

be

monitored

during

the

calibration

operation.

*

It

takes

2

to

3

seconds

for

the

test

tone

1

level

to

stabilize.

4

Adjust

BIAS

until

both

meters

OPEN/CLOSE

ait

‘

SkBRATION

indicate

equal

playback

levels.

a)

Ahigh

reading

on

the

upper

meter

indicates

a

low

bias

current.

b)

A

low

reading

on

the

upper

meter

indicates

a

high

bias

current.

c}

An

equal

reading

on

both

meters

indicates

the

optimum

bias

current

condition.

5

Adjust

REC

LEVEL

CALIBRATION

until

both

meters

reach

the

recommended

level

(REC

CAL).

a)

Recommended

level

b)

The

bias

current

is

now

adjusted

to

the

optimum

level

and

the

tape

sensitivity

compensation

has

been

set.

Press

@,

then

set

CALIBRATION

to

OFF.

Rewind

the

tape

and

start

the

actual

recording.

REC

EQ

NORM

REC

EQ

NORM

REC

LEVEL

REC

EQ

NORM

Making

an

Optimum

©

Recording

ai=recelaeiiare

mm

ace

ler-lipaclirel

a

OF

lit

ele-l(fola)

Although

bias

currrent

and

equalization

are

automatically

set

by

the

Automatic

Tape

Selection

(ATS)

function

for

the

tape

being

used,

you

can

use

the

REC

EQ

CAL

switch

to

change

the

recording

characteristics

according

to

the

nature

of

the

source

material

or

to

compensate

for

the

particular

characteristics

of

the

tape.

REC

EQCAL

AL,

W,

4

To

emphasize

higher

frequencies

in

recordings

For

normal

recordings

To

dampen

higher

frequencies

in

recordings

Bias

Calibration

Recording

Use

the

REC

EQ

CAL

switch

in

conjunction

with

the

BIAS

controi

to

modify

bands

of

sound

and

record

according

to

the

tape’s

characteristics.

¢

When

recording

music

which

has

strong

middle

and

low

frequencies

Set

the

bias

at

flat

with

the

REC

EQ

CAL

switch

set

in

the

HIGH

position

to

increase

the

bias

current.

Adjust

the

BIAS

control

so

that

the

HIGH

and

LOW

meters

indicate

equal

readings.

«

When

recording

music

which

has

strong

high

frequencies

.

Set

the

bias

at

flat

with

the

REC

EQ

CAL

switch

set

in

the

LOW

position

to

decrease

the

bias

current.

Adjust

the

BIAS

control

so

that

the

HIGH

and

LOW

meters

indicate

equal

readings.

Note

With

metal

tape,

because

the

amount

of

frequency

characteristic

modulation

is

not

in

proportion

to

that

of

the

bias,

the

optimum

bias

current

may

not

be

obtained

using

the

methods

above.

Another

use

of

the

REC

EQ

CAL

switch

When

using

special

tapes,

adjusting

the

BIAS

control

with

the

REC

EQ

CAL

switch

set

in

the

NORMAL

position

may

not

result

in

equal

readings

on

the

HIGH

and

LOW

meters.

If

this

occurs,

adjust

the

BIAS

control

after

setting

the

REC

EQ

CAL

switch

to

HIGH

or

LOW.

TC-K333ESA/K990ES

atc)

ceil

are)

What

is

the

Dolby

HX

PRO

System?

The

Dolby

HX

PRO

system

provides

improved

linearity

in

high-range

frequency

response

during

recording.

Tapes

recorded

with

this

system

retain

the

same

high

quality

even

when

played

back

on

other

tape

decks.

As

shown

in

Fig.

EY

,

characteristics

such

as

output

level

and

distortion

differ

widely

according

to

the

bias

(high-frequency)

current.

High

315

Hz

Distortion

i

6.3

KHz

output

‘

\

10

kHz

315

Hz

distortion

Bias

current

———»

High

Established

bias

current

In

conventional

systems

(see

Fig.

EJ

),

the

bias

current

is

susceptible

to

variations

in

certain

recording

signals

which

may

cause

fluctuations

in

frequency

response,

distortion,

or

other

unwanted

characteristics.

High

|

Fluctuation

Output

Frequency

——~®

High

With

the

Dolby

HX

PRO

system,

the

effective

bias

amount

added

to

the

bias

current

is

controlled

in

millisecond

units

to

greatly

reduce

distortion,

improving

linearity

in

high-range

response

and

ensuring

high-

intensity

recording

with

minimal

distortion

and

noise.

TC-K333ESA/K990ES

|

SECTION

2

DISASSEMBLY

Note:

Foilow

the

disassembly

procedure

in

the

numerical

order

given.

Cassette

Holder

©

Lever

(joint)

©

Spring

Ornamental

Plate

@

Ornamental

Plate

Pinch

Lever/Lever

FR

@+8

26

x6

<<

5

@-O

.:

Pinch

lever

S$

(2

pieces)

—-O~

my

[1Jand

[2]:

Pinch

lever

T

/\

and

A\

:

Lever

FR

A\

Washer

1.5

re:

fe:

2

ae

A\

Lever

FR

cea

+BVTT

3

ol

Pinch

lever

T

oe

4)

Spring

Wp

Leaf

spring

Oy

Washer

ors

BS

D>

@®

Lever

PS

ge

@

Pinch

lever

S

@

Nut

|

TC-K333ESA/K990ES

-Comparator

Board/Capstan

Board/Flywheel/FG

Board

LX

and

Z\:

Comparator

board

@-@

:

Capstan

board

x

+PS

3x6

(2

pieces)

~{3]

:

FG

board

(after

removing

@

and

@)

Note:

To

remove

the

above

parts

with

the

Chassis,

remove

the

four

screws

marked

with

x.

Washer

Flywheel

ywheel

(S)

©

+

BVIT

3x5

(2

pieces)

wK+PS

3X6

5

YES.

LZ

poe

Capstan

belt

(2

pieces)

ey

aS

Q

a

:

@

Capstan

board

NY

SY

@

Bracket

MD

board

When

attaching,

align

mark

A

to

this

line.

When

attaching,

align

the

boss

of

the

mode

cam

to

this

position.

Mode

lever

@+8

26x6

PK

\

Sia

cam

A

(4

pieces)

temporary

hook

the

the

mode

cam

to

the

tip

of

belt

to

this

point.

the

mode

lever.

\\

When

attaching,

~__

When

attaching,

align

the

line

of

Reel

Motor

Board

Spacer

M1002

(assist)

@

Ree!

Motor

board

M1001

(reel)

TC-K333ESA/K990ES

SECTION

3

ADJUSTMENTS

3-1.

MECHANICAL

ADJUSTMENTS

PRECAUTION

1.

Clean

the

following

parts

with

a

denaturedalcohol—moist-

ened

swab:

record/playback

head

pinch

roller

erase

head

rubber

belts

capstan

idlers

2.

Demagnetize

the

record/playback

and

erase

head

with

a

head

demagnetizer.

3.

Do

not

use

a

magnetized

screwdriver

for

the

adjust-

ments.

4.

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted.

5.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

capstan

tape

guide

(S)

pinch

roller

(T)

pinch

roller

(§}

erase

head

REC/PB

head

Tape

Path

Adjustment

*Refer

to

Adjustment

Position

on

page

12.

Note:When

using

the

adjustment

methods

for

other

than

replacement

reasons,

please

do

not

tamper

unnecessary

with

the

adjustment

screws

or

the

erasehead

because

either

the

supply

pinch

roller

guide

or

the

re-

cord/playback

head

will

be

made

the

standard

tape

paths.

Moreover,

when

it

is

necessary

to

adjust

and

replace

two

or

more

of

any

of

the

heads

and/or

pinch

rollers,

replace

them

one

by

one,

completely

taking

out

first

tape

path,

and

then

replacing

second

one.

Preparation:

1.

Mirror

cassette

CQO09C

8-909-—708-01

(or

CQ012C

8-909-—708-—02)

If

one

dose

not

have

this,

cut

out

the

sections

of

a

120

—minute

cassette

shell

as

indicated

below

and

use

that

cassette.

2.

Phillips

screwdriver

(medium-size):

For

the

head

adjustment

screws

Blade

—type

screwdriver

(large-size):

For

the

supply

pinch

roller

adjustment

screws

3.

Pen

light

4.

WS-48B(3

kHz,

0

dB)

5.

P-4~A100(10kHz,

-10dB)

Definition

of

Terms:

The

figures

are

of

a

record/playback

head.

Height

Declination

Depth

Adjustment

method:

Note:

Only

perform

this

adjustment

when

the

supply

pinch

roller

is

to

be

replaced.

1.

Insert

the

mirror

cassette

and

put

the

unit

in

record/play-

back

mode.

2.

Check

to

see

whether

the

tape

is

curling

at

the

re-

cord/playback

head

guide

or

the

pinch

roller

guide.

If

it

is

curling,

remove

the

curl

by

adjusting

the

®

tape

curl

adjustment

screw.

Then,

check

that

the

tape

is

running

past

the

middle

of

the

erasehead.

Record/playback

Head

Note:

Only

perform

this

adjustment

when

the

record/play-

back

head

is

to

be

replaced.

1.

Insert

the

mirror

cassette

and

put

the

unit

in

record/play-

back

mode.

2.

(Height

Adjustment)Check

to

see

if

the

tape

is

curling

at

the

tape

guide

of

the

head.

If

it

is

curling,

tighten

screws

@

,

,

and

@,

respectively

by

the

same

angle,

moving

the

head

so

that

it

remains

at

the

same

angle

throughout

the