Sony TC-204SD Bedienungsanleitung

Power

requirements:

Power

consumption:

Recording

system:

Tape

speed:

Fast

forward

and

rewind

time:

Record

Bias

frequency:

Signal

noise

ratio:

Total

harmonic

distortion:

Frequency

response:

SPECIFICATIONS

100, 110,

120,

127,

220

240V

ac,

50/60

and

AEP

Model)

240V

ac,

50Hz

(UK

Model)

Inputs:

4-track

2-channel

stereo

4.8cm/s

(1-7

ips)

Approx.

seconds

(by

C-60)

Outputs:

105

kHz

DOLBY

OFF

With

Ferri-Chrome

Cassette

peak

level

(NAB)

(DIN)

With

chromium

dioxide

cassette

peak

level

(NAB)

With

regular

cassette

peak

level

(NAB)

DOLBY

Improved

5dB

kHz,

above

5kHz

1.7%

DOLBY

OFF

With

Ferri-Chrome

Cassette

and

chromium

dioxide

cassette

20-16,000

(NAB)

40-15,000

(NAB)

40-15,000

(DIN)

With

regular

cassette

20-14,000

(NAB)

40-12,000

(DIN)

‘Dolby’

and

the

double-D

symbol

are

the

trade

marks

Dolby

Laboratory

Inc.

Noise

reduction

system

Manufactured

under

license

from

Dolby

Laboratory

Inc.

Wow

and

flutter:

Record/playback

connector:

Dimensions:

Weight:

0.09

(RMS.

weighted

NAB)

+0.2

(DIN)

MIC

(phone

jacks)

.......cccceeesesseereeree

sensitivity

-72dB

(0.2

mV)

for

low-impedance

microphone

LINE

(stereo

binaural

jack)

..........

(PhONO

jacks)

........eceeeeee

eee

sensitivity

-22dB

(0.06

input

impedance

100

LINE

OUT

(phono

jacks)

.......ceeeeee

output

level

OdB

(0.775

load

impedance

100

with

LINE

OUT

level

control

“10”

suitable

load

impedance

than

HEADPHONES.

........c:seeeeeeeereeeeerentnee

ott

suitable

load

impedance

Input

impedance

fess

than

Output

impedance

less

than

Approx.

430(w)

160(h)

325(d)

7h(w)

14(h)

34(d)

inches

Approx.

8kg

(17

0z)

SERVICE

MANIIAL

TC-204SD

SECTION

OUTLINE

1-1.

BLOCK

DIAGRAM

Nay,

LINE

HEADPHONES

FRONT

Vx?

METER

AMP

LINE

[Qe

(STEREO)

LEVEL

METER

MIG

Q103,

104,

106}

LINE

R181

LINE

QUT

RPH101

R405

PLAYBACK

LEVEL

T301

VOLTAGE

D801~304

REP

B+

REGULATOR

Q301

=»

POWER

MOTOR

SERVO.

MOTOR

306~309

D-O13F

1-2.

NOTES

THE

MOLDED

CHASSIS

The

TC-204SD

uses

molded

chassis.

The

following

notes

should

taken

serving

the

set.

Use

the

Diamond

Oil

No.

440

equivalent.

Use

the

SONY

Grease

No.

SG-101

equivalent.

not

tighten

PTPWH

washer-head

self-tapping

screws

excessively.

Use

larger-size(larger

diameter)

screws

when

the

screw

holes

the

molded

chassis

becomes

loose.

The

spring

which

winds

round

the

capstan-shaft

bearing

should

contact

between

the

reel-table

frame

and

the

pinch

roller

for

the

chassis-ground-

ing

purpose.

TC-204SD

SECTION

ADJUSTMENT

2-1.

MECHANICAL

ADJUSTMENTS

Head

Height

Adjustment

Make

adjustment

cassette

shown

below.

ome

Cut

out

hatched

portions.

C-120

tape

cassette

Viewing

from

the

top,

tape

curl

and

tape

bends

should

not

exist

the

arrowed

portions.

—

Playback

Mode

—

teas

erase

head

pinch

roller

record/playback

head

When

tape curl

exists

the

record/playback

head,

adjust

the

head

height

using

adjustment

shim

washer.

record/play

back

head

adjustment

shim:

3-§13-237-01

t=0.1mm

3-513-237-1711

t=0.2mm

es)

—

adjustment

shim

washer

When

tape

curl

exists

the

erase

head,

adjust

the

head

height

adjusting

the

screw

the

tape

guide

side.

Fast

Forward

and

Rewind

Torque

Adjustment

Specification:

Fast

Forward

and

Rewind:

55—95

g-cm

(0.77—1.32

oz-inch)

necessary,

bend

the

spring

shown

below.

flywheel

spring

Back

Tension

Torque

Adjustment

—

Playback

and

PAUSE

modes

—

tape

cassette

for

adjustment

Wrap

tape

turns.

‘

eee

Cut

out

here.

2.5~49-cm

(0.03~0.06

oz:

inch)

4.8cm/s

(173

ips)

209

tension

gauge

Unplug

power

cord

and

adjust

spring

hooking

position

obtain

the

specified

value.

supply

reel

spindle.

adjust

spring

hooking

position.

tension

lever

TC-204SD

2-2.

ELECTRICAL

ADJUSTMENTS

AND

MEASUREMENTS

PRECAUTION

Clean

the

following

parts

with

alcohol

moistened

swab:

;

record/playback

head

pinch

rollers

erase

head

rubber

belts

cap

stans

idlers

Demagnetize

record/playback

head

with

head

demagnetizer.

not

use

magnetized

screwdriver

for

adjustments.

After

the

adjustments,

apply

small

amount

locking

compound

the

parts

adjusted.

The

adjustments

should

performed

the

order

arranged

this

service

manual.

The

adjustments

and

the

measurements

should

performed

for

both

L-CH

and

R-CH

with

rated

power

supply

voltage

unless

otherwise

specified.

The

record

and

playback

level

adjustments

should

carefully

performed.

Tapes

required:

blank

tapes

(completely

erased

with bulk

eraser)

SONY

CS-10

(HF)

CS-20

(CrO2)

with

two

extra

holes

CS-30

(Fe-Cr)

test

tapes

SONY

P-4-A81S

(6.3

kHz,

-10

dB)

P-4-A82

(10

kHz,

-10

dB)

P-4-L81

(333

Hz,

dB)

WS-48

kHz,

dB)

The

switches

and

the

controls

should

set

follows

unless

otherwise

specified.

DOLBY

switch:

OFF

LIMITER

switch:

OFF

LINE

control:

MIN

MIC

control:

MIN

TAPE

SELECT

switch:

NORMAL

LINE

OUT

control:

MAX

10.

Standard

record:

Supply

the

specified

input

signal

level

the

input

jack

and

set

the

MIC

LINE

control

obtain

the

specified

output

signal

level.

Set

the

LINE

control

MIN

when

MIC

input

used

set

MIC

control

MIN

when

LINE

used.

Normal

Input

Level

die

3000

10K

input

level

Svnde

~104B

(0.77

mV)

(0.25

Normal

Output

Level

Pine

ou]

load

impedance

100

0dB

Tape

Speed

Adjustment

Procedure:

Mode:

Playback

speed

checker

SONY

LMF-30

WS-48

(3kHz,

0dB)

LINE

OUT

WS-48

sat

(3kHz,

OdB)}

digital

frequency

counter

LINE

OUT

Adjust

R602

(R607)

obtain

specified

value.

Specification:

speed

checker

digital

frequency

counter

Frequency

difference

between

beginning

and

end

tape

should

within

(30Hz).

Adjustment

Location:

R602

(R607)

servo

board

R607:

Serial

No.

17651

and

later

Model)

Serial

No.

15651

and

later

(AEP

Model)

Serial

No.

17151

and

later

(UK

Model)

_TC-2045D

PAUSE

Timing

Adjustment

—

Stop

Mode

—

The

take-up

reel

and

the

pinch

roller

should

stop

the

same

time.

necessary,

bend

the

spring

shown

below.

pinch

roller

(lo

;

Adjust

bending

here.

Motor

Switch

(S603)

Position

“Adjustment

—

Stop

Mode

—

Loosen

the

adjustment

screw

and

adjust

the

switch

position

that

the

switch

leafs

becomes

+0.5mm

(1342)

show

below.

After

the

adjustment,

secure

the

screw

with

suitable

looking

compound.

motor

switch

(S603)

adjustment

screw

brake

release

plate

Muting

Switch

(S602)

Position

Adjustment

—

Stop

Mode

—

Loosen

the

adjustment

screw

and

adjust

the

switch

position

that

the

gap

the

switch

contacts

becomes

1.0

0.5

mm.

1.040.5mm

muting

switch

(S602)

contact

record

lock

plate

Timing

Switch

(S601)

Position

Adjustment

—

Stop

Mode

—

Loosen

the

adjustment

screws

and

adjust

the

posi-

tion

the

timing

switch

circuit

board

that

the

muting

lever

just

contacts

the

switch

hole

and

the

switch

starts

move.

After

the

adjustment,

secure

the

screws

with

locking

compound.

timing

switch

(S607)

adjustment

screw

adjustment

screw

TC-204SD

MEMO

T¢C-204SD

TC-204SD

thas

Playback

Equalizer

Adjustment

Record

Level

Adjustment

Playback

Level

Adjustment

Record/playback

Head

Azimuth

Adjustment

Procedure:

Mode:

Playback

Mode:

Playback

Mode:

Standard

record

(See

page

Mode:

Playback

P-4-L81

TAPE

SELECT

switch:

NORMAL

oie

(333

Hz,

dB)

P-4-A82

chy

ose

(10kHz,

-10aB)

10kQ.

attenuator

P-4-A81S

otto

psezoke)

-A81

(6.3kHz,

-10dB)

LINE

OUT

2dB

(0.95

LINE

OUT

ei,

1081026

rede

Mode:

Playback

Adjust

R125

(L-CH)

and

R225

(R-CH)

obtain

Mode:

Playback

racers

portion

(0.95

VTVM

reading.

TAPE

SELECT

switch:

CrO2

Fe-Cr

Assure

that

the

LINE

OUT

level

does

not

change

when

the

mode

changed

from

playback

stop

several.times.

P-4-A82

(10kHz,

-10dB)

LINE

OUT

OdB

(0.775

Adjust

R153

(L-CH)

and

R253

(R-CH)

obtain

0dB

(0.775

VTVM

reading.

Change

the

blank

tape

CS-20

and

CS-30,

and

perform

the

same

record

and

playback

procedure.

Measure

LINE

OUT

level.

Specification:

LINE

OUT

level:

1.5~2.5

-9.5dB

(0.26

(0.92

1.05

Level

difference

between

channels:

adjustment

phase

aoe

less

than

Adjust

R124

(L-CH)

and

R224

(R-CH)

“

eer

obtain

the

LINE

OUT

voltage

2.5-6.5

lower

fenhase

rac

phase

(B-CH)

than

that

obtained

step

above.

patter

(L)

(R)

(L)(R)

around

the

(Fe

highest

Level

drop

VTVM

should

within

readings.

0.5

dB.

Oscilloscope

patterns

azimuth

[Allowance]

Specification:

SONY

tape

LINE

OUT

level

eae

-0.5

~+0.5

(0.74

0.84

Note:

R124

and

R224

are

moved

too

much,

repeat

the

playback

level

adjustment

page

Assure

that

LINE

OUT

level

difference

does

not

Meter

Calibration

change

when

the

mode

changed

from

playback

stop

several

times.

Procedure:

R253

(R-CH)

R153

(L-CH)

Mode:

Standard

record

(See

page

6.)

osc

VTVM

attenuator

100

kQ.

After

adjustment,

apply

locking

compound

the

screw.

record/playback

pinch

roller

LINE

OUT

LINE

OaB

(0.775

333

Hz,

-10dB

(0.25V)

adjustment

screw

Adjust

R145

(L-CH)

and

R245

(R-CH)

make

OVU

indication.

Specification:

TC-204SD

Playback

Equalizer

Adjustment

Procedure:

Mode:

Playback

TAPE

SELECT

switch:

NORMAL

P-4-A82

(10kHz,

-10dB)

LINE

OUT

—5

(0.44

Mode:

Playback

TAPE

SELECT

switch:

CrO2

Fe-Cr

P-4-A82

(10kHz,

-10dB)

LINE

OUT

~9.5dB

(0.26

Adjust

R124

(L-CH)

and

R224

(R-CH)

obtain

the

LINE

OUT

voltage

2.5-6.5

lower

than

that

obtained

step

above.

Note:

R124

and

R224

are

moved

too

much,

repeat

the

playback

level

adjustment

page

Meter

Calibration

Procedure:

Mode:

Standard

record

(See

page

6.)

ose

€°)

VTVM

attenuator

100

kQ.

LINE

OUT

OdB

(0.775

LINE

333

Hz,

-10dB

(0.25V)

(@,)|

Adjust

R145

(L-CH)

and

R245

(R-CH)

make

OVU

indication.

Specification:

Record

Level

Adjustment

Record

Bias

Adjustment

Procedure:

Mode:

Standard

record

(See

page

Mode:

Standard

record

(See

page

osc

blank

tape

blank

tape

€)

SONY

CS-10

€)

SONY

CS-10

attenuator

—_—_—_—_

EAC)

333

Hz,

—10dB

(0.25

LINE

1kHz,

-10dB

(0,25

Mode:

Playback

10kHz,

-10dB

(0.25

recorded

portion

LINE

OUT

OdB

(0.775

Adjust

R153

(L-CH)

and

R253

(R-CH)

obtain

(0.775

VTVM

reading.

Change

the

blank

tape

CS-20

and

CS-30,

and

perform

the

same

record

and

playback

procedure.

Measure

LINE

OUT

level.

Mode:

Playback

recorded

portion

LINE

OUT

Adjust

C154

(L-CH)

and

C254

(R-CH)

obtain

kHz-signal

level

0.5

lower

than

that

kHz.

Specification:

SONY

tape

LINE

OUT

level

-0.5

~+0.5

Note:

When

10kHz

output

level

too

low,

turn

the

trimmer

capacitor

counter-

clockwise.

kHz

signal

level

0dB

lower

than

that

kHz

signal.

Specification:

CS-20

(0.74

0.84

C154

(L-CH)

R253

R153

(R-CH)

(L-CH)

19kHz

Filter

Adjustment

Procedure:

Mode:

Standard

record

(See

page

osc

©)

attenuator

LINE

OUT

MIC

kHz

£20

(-60

dB,

0.77

mV)

Adjust

L105

(L-CH)

and

L205

(R-CH)

for

minimum

VTVM

reading.

TC-204SD

T¢c-204SD

_TC-204

SECTION

DIAGRAMS

Note:

3-1.

MOUNTING

DIAGRAM

B+

pattern

Serial

No.

Model

17650

—

Conductor

Side

—

AEP

Model

1565

. :

Model

1715¢

[SERVO

AMP

BOARD]

i918

)

—~{

20~28

29~32

hts

‘

[AUDIO

AMP

BOARD]

‘

urine

wur/ver

WHT/6RW

15,

Ri8i,

281

LINE

OUT

BRN

“4

‘si

PL4

PL3

PL2

REC

TAPE

METER

|WHT/BLK

40,

WHT/BRN

1302

HEADPHONES:

ren

7301

BRN

C309

comes

cael

Poy

—{29~35

-——

{29-31

PLS

(reo)

(S)

doce

Neal

een

ton

(SWITCH

WHT/BLK

ensor

Kok

(EFI35-36)

“Torey

(REDD

22)

WHT

WeRY)

(RED)

WHT

RED

art

(WHT)

RPHIOL.

201

Gery))

tery)

(PF145-3602A)

N28

METER(L)'

BRN)

(YEL!

50,51)

~<50,

scone

21>

REO

16 17

£16,

WHT

WHT/

EBLK

TAPE

BIAS

———

SELECT

Low

WBRND)

(GRY)

DOLBY

ON(FILTER

OFF)

LIMITER

NORM

RUB,

213

RI,

OFF

HIGH

SOKtA)

20K

(A)

OFF

TC-204SD

Note:

Serial

No.

Model

17651

and

later

AEP

Model

15651

and

later

Note:

Model

17151

and

later

;

Serial

No.

B+

pattern

Model

17650

AEP

Model

15650

’

Model

17150

CSERVO

AMP

BOARD

[SERVO

AMP

BOARD]

20~28

TAPE_SPEED

neocon

ORG

4VIO

vio

(nokta,

(OOOO)

©B®D

MOOD)

Op®

98,

fOWER

160m4

lial

Q102,

202

Q103,

203

}

2SC632A

MODEL]

Q303~305

Q110~112

Q210~212

;

2SC634A

Q104~108

Q204~208

Q302:

2S8C1384

1C101,

201:

CX-064

(UK

AEP

MODEL)

—

PLAN

AR,

EcR,

10111213141516

1718

(Top

view}

Q101,

201

2501362

Q301:

2SC1760

IC601:

CX-065

Q109,

209

Q601

Q601,

602:

2SC1363

pee

etal

WHT/BLK

vio

WHT/Vio.

“K)

12345678

€

CX-O65A

OLB:

BoE

30,

D101,

201

234564

POLANBRNY

D103,

203

;

1T40

D301~304

$1B01-02

pewio)20

D310,

312,

313

D306~309

D102,

202:

1T22

D305:

EQA01-02R

D311:

SLP2?4B

WHT

(99

cathode

(BLU)

BRND

cathode.

ande

anode anode

cathode

mode

sé

TAPE

BIAS

———

SELECT.

£@

Low

pis

DOLBY

SOMIETLTER

OFF)

LIMITER

NORM

FeCr

OFF

HIGH

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