Sony TC-188SD User manual

Mode!

Model

SPECIFICATIONS

GENERAL

Frequency

Response:

DOLBY

OFF

Power

Requirements:

110V,

120V,

220V,

240V

ac,

50/60

With

Ferri-Chrome

cassette

20—16,000

(NAB)

Power

Consumption:

11W

30—15,000

+3dB

(NAB)

Dimensions:

Approx.

440

(w)

145

(h)

290

(d)

30—15,000

(DIN)

1/4

(w)

53/4

(h)

113/g

(d)

inches

With

chromium

dioxide

cassette

20—16,000

(NAB)

30—15,000

+3dB

(NAB)

30—15,000

(DIN)

TAPE

RECORDER

SECTION

With

regular

cassette

Track:

4-track

2-channel

stereo

20—14,000

(NAB)

Fast

Forward

30—13,000

(DIN)

Rewind

Time:

Approx.

seconds

with

Sony

cassette

C-60

Wow

and

Flutter:

0.08%

WRMS

(NAB)

+0.2%

(DIN)

S/N

Ratio:

DOLBY

OFF

Weight:

Approx.

6.3

kg,

140z

‘Dolby’

and

the

double-D

symbol

are

the

trade

marks

With

Ferri-Chrome

cassette

Dolby

Laboratory

Inc.

Noise

reduction

system

manufac-

peak

level

(NAB)

tured

under

license

from

Dolby

Laboratory

Inc.

(DIN,

1975

rev.)

*0dB=0.775V

| |

(DIN,

old)

With

chromium

dioxide

cassette

peak

level

(NAB)

SAFETY-RELATED

COMPONENT

WARNING!!

DOLBY

Improved

5dB

kHz,

10dB

COMPONENTS

IDENTIFIED

SHADING

THE

sbove’s

Kuz

SCHEMATIC

DIAGRAMS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

CPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUBLISHED

SONY.

—

Continued

page

—

AANUAL

667

Sees

kets

cont

nee

ase

seni

T=SGoU

Total

Harmonic

Distortion:

Bias

Frequency:

Inputs:

Outputs:

1.3%

105

kHz

MIC

(two

phone

jacks)

Sensitivity:

0.2

(-72

dB)

Impedance:

for

low-impedance

microphone

LINE

(two

phono

jacks)

Sensitivity:

0.06V

(-22

dB)

Impedance:

100

REC/PB

(connector)

Input

impedance:

less

than

10kQ

LINE

OUT

(two

phono

jacks)

Normal

level:

0.435V

(-5dB)

Load

impedance:

100

suitable

load

impedance

than

10kQ

HEADPHONES

(binaural

jack)

Load

impedance:

for

low-impedance

headphones

REC/PB

(connector)

Output

impedance:

less

than

10k

0dB=0.775V

“L-L

MIC

REC/PB

$305

ANE

SI0l=

INPUT

SELECT

101-3

REC

MUTE

101

5305-3

FORWARD

‘

REC

LEVEL

LINE

AMP

BUFFER

AMP

;

FAST

Q105,

106

Q107

Rewind?

CNJ201-1

[LINE

OUT

INVYSVIG

WO01E8

3603

MUTING

“%

eta

PRESSING

DOLBY

ONE

FUNCTION

CIRCUIT

B+

BUTTONS

Q108~112

[HEADPHONE

101

RV103

METER

AMP

3|£

REC

LEVEL

a113

S10!-3

S101-1

PLAYBACK

R-CH

HRP

C4)

101

eet

D101

PLAYBACK

—

RECORD

—_

D301,

302

B+

Bren

R-CH

SERVO

AMP

CIRCUIT

Saige

Q601~603

Q302

D303,

304

T301

R-CH

OMITTED

308,

309

TC-188SD

2-1.

REMOVAL

SECTION

DISASSEMBLY

Top

Case

and

Bottom

Cover

Removal

Top

Case

Removal:

@-—@

Bottom

Plate

Removal:

top

case

Screws,

@BW4x22

case

screws,

®BW4x22

”

six

screws,

BV3x6

bottom

plate

Cassette

Lid

Removal

cassette

lid

cassetre

holder

TC-188SE

Deck

Mechanism

Removal

deck

mechanism

Remove

the

record

link

plate.

Remove

cord.

PSW3x6

Cassette

Holder

Removal

Remove

four

retaining

rings

and

screw.

;

screw,

retaining

rings,

2.5

PTPWH

2.6x6

retaining

ring,

2.5

retaining

ring,

E2.5

TC-188SD

Meter

Lamp

Removal

Release

the

claws.

Panel

Removal

Pull

off

knobs.

é——

3x6

(3)

Remove

tape.

—

lamp

meter

escutcheon

(Part

No.

1-518-273-00)

[P<

meter

cover

TC-188SD

SECTION

ADJUSTMENTS

3-1.

MECHANICAL

ADJUSTMENTS

PRECAUTION

Clean

the

following

parts

with

denatured-

alcohol-moistened

swab:

record/playback

head

pinch

roller

erase

head

rubber

belts

capstan

idlers

Playback

Back

Tension

Torque

Adjustment

—

Playback

Mode

—

Use

type

CQ-102A

cassette

torque

meter.

Demagnetize

the

record/playback

head

with

head

demagnetizer.

(Do

not

bring

the

head

demagnetizer

the

erase

head.)

not

use

magnetized

screwdriver

for

the

supply

reel

spindle

adjustments.

After

the

adjustments,

apply

suitable

locking

compound

the

parts

adjusted.

The

adjustments

should

performed

with

the

rated

power

supply

voltage

unless

other-

wise

noted.

Change

the

hooking

position.

back

tension

fever

Tape

Path

Adjustment

—

Playback

Mode

—

Make

adjustment

cassette

shown

below.

Specification:

2.5—3.5

g-cm

(0.035—0.048

oz-inch)

OE):

—

C-120

Cut

out

hatched

tape

cassette

portions.

playback

mode

and

viewing

from

the

front,

adjust

the

head

heights

eliminate

tape

curl

and

tape

twist

arrowed

portions.

erase

head

record/playback

3-513-237-01

(t=0.1)

3-513-237-11

(t=0.2)

Shim,

head

height

adjustment

screwdriver

Pinch

Roller

Pressure

Adjustment

—

Playback

Mode

—

Hook

the

pinch

roller

with

spring

scale.

Pull

the

spring

scale.

Slowly

return

the

pinch

roller

and

read

the

spring

scale

just

when

the

pinch

roller

starts

rotate.

pinch

roller

Shut-off

Time

Measurement

Specification:

Within

six

seconds

PAUSE

Timing

Adjustment

—

PAUSE

Mode

—

pinch

roller

)

Bend

down.

Bend

here

and

adjust

the

position

pinch

roller

that

the

rotations

pinch

roller

and

reel

spindles

stop

the

same

time

when

slowly

de-

pressing

PAUSE

button.

Motor

Switch

(S602)

Position

Adjustment

Timing

Switch

(S601)

Position

Adjustment

—

Stop

Mode

—

Stop

Mode

—

Loosen

adjustment

screw

and

adjust

the

Loosen

the

screws

and

adjust

position

the

position

the

switch

for

the

specified

clearance

switch

bracket

marked

figure

below.

between

the

switch

leaves.

After

the

adjustment,

tighten

the

screws.

After

the

adjustment,

tighten

and

lock

the

screw

with

suitable

locking

compound.

motor

switch

(S602)

5.5—6.5mm

(7/32—VY%q")

timing

switch

(S601)

adjustment

screw

brake

release

lever

Contacts.

switch

bracket

Forward

Torque

Adjustment

—

Playback

Mode

—

Use

type

CQ-102A

cassette

torque

meter.

tension

arm

adjustment

plate

change

the

hooking

position

(Approx.

3g-cm/one

step)

Specification:

28—50

g-cm

(0.39—0.69

oz-inch)

TC-188SD

Fast

Forward

and

Rewind

Torque

Adjustment

—

Fast

Forward

and

Rewind

Modes

—

Use

type

CQ-201A

cassette

torque

meter.

Bend

the

spring

for

the

torque

55—95

g-cm

(0.77—1.3

oz-inch).

fly

wheel

Bend

right

left.

spring

Muting

Switch

(S603)

Position

Adjustment

—

Stop

Mode

—

Loosen

the

adjustment

screw

and

adjust

the

position

the

switch

specified.

muting

switch

(S603)

7.0—1.5mm

contact

adjustment

screw

button

lock

plate

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