Sony TC-PB5 User manual

Table of contents

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SPECIFICATIONS

Playback

System:

4-track

2-channel

stereo

Fast-forward

and

Rewind

Time:

Approx.

90

sec.

(with

C-60

cassette)

DOLBY

NR

OFF

e@

With

TYPE

IV

cassette

(Sony

METALLIC)

59

dB

at

peak

level

eWith

TYPE

II

cassette

(Sony

EHF)

57

dB

at

peak

level

DOLBY

NR

ON

Improved

by

5

dB

at

1

kHz,

10

dB

above

5

kHz

Signal-to-noise

Ratio:

SAFETY-RELATED

COMPONENT

WARNING!!

MPONENTS

IDENTIFIED

BY

SHADING

AND

MARK

>,

ON

THE

SCHEMATIC

DIAGRAMS,

EXPLODED

VIEWS

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

PUBLISHED

BY

SONY,

mel

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

UNE

MARQUE

/\

SUR

LES

DIAGRAMMES

SCHE-

MATIQUES,

VUES

EXPLOSEES

ET

LA

LISTE

i=

;

1

LES

FONCTIONNEMENT.

NE

REMPLACER

CES

—

PIECES

SONY—DGONT-

Frequency

Response:

DOLBY

NR

OFF

e@

With

TYPE

IV

cassette

(Sony

METALLIC)

20

—

19,000

Hz

30

—

17,000

Hz

(+3

dB)

e@With

TYPE

II

cassette

(Sony

EHF)

20

—

18,000

Hz

30

—

16,000

Hz

(+3

dB)

©

With

TYPE

|

cassette

(Sony

HFX)

20

—

17,000

Hz

Wow

and

Flutter:

0.05%

WRMS

Inputs:

Microphone

inputs

(phone

jacks)

Sensitivity

0.4

mV

(—65

dB)

For

a

low-impedance

microphone

Outputs:

Line

outputs

(phono

jacks)

Output

level

0.435

V

(—5

dB)

at

load

impedance

50

kQ

Load

impedance

over

10k

Headphone

output

Output

level

77.5

mV

(—20

dB)

at

a

load

impedance

of

8

2,

with

the

LINE

OUT/

HEADPHONES

control

at

MAX

—

Continued

on

next

page

—

H

S

O

i

)

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

N

DANS

CE

MANUEL

ES

id

GENERAL

Power

Requirements:

Power

Consumption:

Dimensions:

Weight:

120

V

ac,

60

Hz

(US,

Canadian

model)

220

V

ac,

50/60

Hz

(AEP

model)

240

V

ac,

50/60

Hz

(UK

model)

110,

120,

220,

240

V

ac

~,

50/60

Hz

(E

model)

13W

Approx.

215

(w)

x

105

(h)

x

280

{(d)

mm

(8%

(w)

x

4%

(h)

x

11%

(d)

inches)

including

projecting

parts

and

controls

Approx.

3.5

kg

(7

Ibs

11

oz)

OdB

=

0.775V

Tape

Transport

Mechanism

Type:

TCM-110V6.

ry

ee

ee

ey

ee

ey

ee

a

a

ee

et

ant

ee

a

gL

ee

ee

ee

Pee

ee ee

en ny

Pe

ee

MODEL

IDENTIFICATION

—

Specification

Label

—

SONY.

STEREO

CASSETTE

PLAYER

SERIAL

NO.

MADE

IN

KOREA

|

PRINTED

IN

JAPAN

3-579-327-01

US,

Canadian

model:

AC

120V 60Hz

13W

AEP

model:

AC

220V~

50/60Hz

13W

UK

model:

AC

240V~

50/60Hz

13W

E

model:

AC

110,

120,220,240V~

50/60Hz

13W

moveL

No.

|C-PBS

e

HOW

TO

OPERATE

THE

SET

RANDOM

MEMORY

MUSIC

SENSOR

(RMS)

TC-PB5

MEMORY

Button

@

he

RMS

Display

Window

UP

Button

and

CHECK

Button

DOWN

Button

DOWN

RMS

Button

@}

@

MEMORY

Button

Press

to

memorize

the

displayed

selection

number.

When

the

number

to

be

memorized

has

been

selected

by

the

UP

or

DOWN

button,

the

selection

number

blinks

in

the

RMS

display

window.

When

the

MEMORY

button

is

pressed,

the

selection

number

lights

steadily

for

about

three

seconds

to

show

that

the

number

has

been

memorized,

after

which

the

number

begins

to

blink

again.

Up

to

15

selection

numbers

can

be

memorized.

If

you

want

to

repeat

playback

of

the

same

selection,

press

the

MEMORY

button

as

many

times

as

you

want

the

selection

to

be

played

back.

@

If

you

once

turn

off

the

unit

or

depress

the

&

button

or

RMS

but-

ton,

the

memory

will

be

cancelled.

@

CHECK

Button

Press

to

check

which

selection

numbers

have

been

memorized.

Every

time

this

button

is

pressed,

a

memorized

program

number

is

indicated.

When

this

button

is

kept

depressed,

the

memorized

selection

numbers

will

be

indicated

in

turn.

@After

the

last

selection

number

memorized

is

indicated,

the

number

blinks

for

about

three

seconds,then

lights

steadily.

@

To

check

during

the

RMS

play,

first

stop

the

tape,

then

press

this

button.

©

RMS

Button

Press

to

get

ready

for

RMS

operation.

When

the

RMS

button

is

pressed,

“0”

is

displayed.

If

you

wish

to

cancel

the

memorized

selection

numbers,

press

this

button

again.

@

UP

Button

and

DOWN

Button

Press

to

select

the

selection

number.

“4”

means

the

first

selection

recorded

on

the

cassette

tape.

Every

time

the

UP

button

is

pressed,

the

selection indicated

in-

creases

by

one

to

‘15”,

after

which

it

returns

to

“1”.

Every

time

the

DOWN

button

is

pressed,

the

selection

indicated

decreases

by

one

to

‘'1”",

after

which

it

returns

to

“15”.

©

RMS

Display

Window

The

selection

number

selected

is

displayed

in

this

window.

TC-PB5

BASIC

RMS

OPERATION—For

example:

to

play

selection

three

first,

selection

six

second

and

selection

one

third.

@First,

insert

a

cassette

and

depress

the

POWER

switch

to

ON.

Button

Display

window

RMS

UP

eee

Press

three

@2

0%:

e

times.

once

Illuminates

for

about

three

seconds.

MEMORY

°

~

Memorizing

the

6"

selection

Selection

3

After

step

@

blinks

=

ris

e

Press

three

|

ta

.

:

ES

3

i

times.

|

see

selection

3

once

MEMORY

illuminates

for

about

three

seconds.

5)

al

Selection

6

Memorizing

the

1St

selection

After

step

@

blinks

DOWN

6)

Press

five

times.

Selection

6

once

MEMORY

IHuminates

for

about

three

seconds.

oe

|

j

ez

The

1St

selection

is

memorized

q

Selection

1

To

check

which

selection

numbers

have

been

memorized.

at]

Selection

3

Press

each

time

or

keep

depressed:

Selection

6

In

this

way,

up

to

15

selection

numbers

can

be

memorized.

When

15

selections

are

memorized,

the

last

selection

number

blinks

rapidly

to

show

that

no

more

selection

can

be

memorized.

El

The

3°95

selection

is

memorized.

|

The

6!

selection

is

memorized.

blinks

three

times

:

E—-H-ai—

Selection

1

Selected

selection

“1”

begins

to

blink,

indicating

that

you

can

memorize

more

selection

numbers.

Shut-Off

Detection

and

Precaution

On

Repairing

In

this

set,

the

shut-off

detection

is

made

optically.

The

take-up

reel

spindle

has

the

five

holes.

The

light

of

the

lamp

received

by

the

light

guide

is

inter-

mettently

applied

to

the

photo

transistor

by

means

of

the

rotation

of

the

reel

spindle.

The

pulse

generated

by

the

photo

transistor

Q803

is

amplified

by

Q801

and

is

fed

to

the

mechanism

control

IC302.

Accordingly,

when

it

is

necessary

to

repair

the

unit

after

removing

the

ornamental

plate,

connect

an

af

oscillator

to

the

terminal

Q)

of

IC303

as

shown

below,

so

as

not

to

operate

the

shut-off

mechanism.

light

guide

“ote

%

photo

transistor

Ny

~~!

“N

\

“XN

10Hz

—

nes)

10dB

oe,

ni

0.01uF

OSC

ornamental

plate

take-up

reel

spindle

hole

MAIN

BOARD

(Conductor

side)

Handling

Precautions

for

MOS

ICs

Generally,

the

insulation

resistance

of

the

oxide

layer

in

MOS

IC

structures

is

very

high,

and

the

oxide

layer

is

very

thin.

Because

of

this,

it

is

possible

that

the

static

voltages

usually

present

on

clothes

and

the

human

body

will

be

enough

to

generate

a

potential

difference

across

the

insulator,

high

enough

to

cause

a

breakdown

of

the

insulating

layer.

The

following

precautions

should

be

taken

while

handling

these

ICs.

(Particular

care

should

be

taken

under

conditions

of

low

humidity.)

Precautions

in

Replacing

MOS

ICs

1.

Store

newICs

by

inserting

them

into

a

urethane-

polyester

cushion

(which

is

somewhat

conduc-

tive),

or

wrapping

it

in

aluminum

foil,

so

that

all

the

pins

are

at

the

same

potential.

(The

ICs

should

be

stored

in

that

manner

until

mounted

on

the

circuit

board.)

Fig.

A

partially

conductive

unrethane-polyester

cushion

IC

Fig.

B

aluminum

foil

2.

Check

the

soldering

iron

for

possible

power-line

leakage

current.

Make

sure

that

there

is

no

leakage

path

by

connecting

an

ohmmeter

to

the

tip

of

the

soldering

iron

and

the

plug

as

shown

in

Fig.

C.

If

there

is

a

leakage

path,

use

some

other

soldering

iron.

VOM

(2.x

10,000

range)

3.

Equalize

any

potential

difference

between

the

clothes,

the

tools

in

use,

the

work

bench,

the

set

being

worked

on,

and

the

packaged

IC

by

touching

them

all

in

succession

with

the

hands

or

a

conductive

wire

or

tool.

4.

The

following

are

effective

methods

for

handl-

ing

ICs

that

remove

the

potential

difference

across

the

oxide

layer.

@

Use

a

paper

clip

modified

by

soldering

ina

wire

braid

insert.

wire

braid

clip

>)

ye

le

S

soldered

soldered

sli

,

Make

sure

that

there

is

Fig.

D

no

solder

on

the

inside.

clip

partially

conductive

.

urethane-polyester

Fig.

E

cushion

or

aluminum

oll

wire

braid

clip

(ooo

res

WY

Make

sure

that

all

the

pins

are

in

contact

with

the

wire

braid

(all

.

the

pins

will

then

be

at

the

same

Fig.

F

__

potential.).

TC-PB5

@

Take

a

short

length

of

fine

bare

wire

and

Precaution

while

Checking

C-MOS

ICs

wind

it

around

the

IC

so

that

it

shorts

all

the

pins

of

the

IC,

while

it

is

still

in

the

urethane-

polyester

cushion

or

aluminum

foil.

This

ensures

that

all

the

pins

are

at

the

same

The

C-MOS

ICs

(Complementary

MOS)

are

MOS

ICs

that

have

their

output

sections

made

up

of

N-channel

and

P-channel

push-pull

stages

to

increase

their

speed

of

operation.

If

the

output

terminal

of

potential.

these

ICs

comes

into

contact

with

B+

or

B-

voltage,

[aspondes

we

hookup

then

the

FET

which

is

ON

at

that

time

will

either

wire,

etc.)

become

shorted

or

open.

This

is

valid

for

all

the

output

sections

that

are

connected

together

by

the

interconnections.

Even

the

circuits

that

are

physically

separated

(and

not

on

the

same

board)

can

be

destroyed

simultaneously.

Example:

partially

conductive

urethane-polyester

cushion

or

aluminum

foil

If

this

line

is

grounded,

or

touches

B+

or

B-

bus...,

the

output

stage

of

this

IC

will

be

destroyed.

Fig.

|

Fig.

G

@

When

it

is

necessary

to

handle

the

[C

with

the

fingers,

do

not

touch

any

pin,

and

hold

the

IC

at

the

ends

of

its

plastic-package

case

as

shown

in

Fig.

H.

St,

Fig.

H

Method

of

Mounting

Insert

the

IC

while

holding

it

with

the

modified

clip,

and

solder

all

the

pins

with

the

clip

still

shorting

the

pins.

(Similarly,

solder

all

the

pins

while

the

bare

shorting

wire

is

still

wound

around

them.).

Remove

the

clip

or

the

bare

shorting

wire

only

after

all

the

pins

have

been

soldered.

meg pee

C-PB5

SECTION

1

OUTLINE

BLOCK

DIAGRAM

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TC-PB5

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

BOTTOM

PLATE

bottom

plate

TOP

COVER

top

cover

nt

ty,

BOLay

an

Mic

Moun,

Mat

sae

c-PBs

|

CASSETTE

LID

@

Press

the

EJECT

knob.

cassette

lid

MECHANISM

SECTION-1

Remove

the

mechanism

section.

@

Remove

the

lead

wires

from

cord

stopper.

lead

wires

—10—

TC-PB5

SWITCH

BOARD

@O

PTPWH3

x

8

switch

board

MECHANISM

SECTION-2

mechanism

section

front

panel

‘C-PB5

SECTION

3

ADJUSTMENTS

3-1.

MECHANICAL

ADJUSTMENTS

PRECAUTION

.

Clean

the

following

parts

with

a

denatured-

alcohol-moistened

swab:

playback

head

pinch

roller

tape

guide

rubber

belts

capstan

idlers

.

Demagnetize

the

playback

head

with

a

head

demagnetizer.

.

Do

not

use

a

magnetized

screwdriver

for

the

adjustments.

.

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted.

.

The

adjustments

should

be

performed

with

the

tated

power

supply

voltage

unless

otherwsie

noted.

Torque

Measurement

and

Back

Tension

Torque

Adjustment

Torque

35—55

g-cm

CQ102C

|

(0.48-0.76

oz-inch)

F

2.5—4.5

g-cm

Poe

(0.04—0.06

0z-inch)

2. If

the

specified

back-tension

torque

is

not

ob-

tained,

change

the

hooking

position.

supply-reel

spindle

ack-tension

lever

weaker

«<«———w>

stronger

Change

the

hooking

position.

(1g-cm

per

one

slide.)

—12—