Tensai Tad-30 User manual

(il

TENSAI

Service

Manual

MODEL

NO.

TAD-30

COMPACT

DISC

DIGITAL

AUDIO

PLAYER

=

TO

SERVICE

PERSONNEL

1.

Critical

Components

Information.

Components

having

special

characteristics

are

marked

A\

and

must

be

replaced:

with

parts

having

specifica-

tions

equal

to

those

originally

installed.

2.

Leakage

Current

Measurement

(For

120V

Model

EQUIPMENT

AC

LEAKAGE

TESTER

Only).

UNDER

TEST

OR

EQUIVALENT

When

service

has

been

completed,

it

is

imperative

that

you

verify

that

all

exposed

conductive

surfaces

are

®

roperly

in

from

ircuits.

properly

insulated

from

supply

circui

WAU

OUTLET

INSULATING

TABLE

=

@

Meter

impedance

should

be

equivalent

to

1500

ohm

shunted

by

0.15uF.

@

Leakage

current

must

not

exceed

0.5mA.

©

Be

sure

to

test

for

leakage

with

the

AC

plug

in

both

polarities.

@®

CAUTION

USE

OF

CONTROLS

OR

ADJUSTMENTS

OR

PERFORMANCE

OF

PROCEDURES

OTHER

THAN

THOSE

SPECIFIED

IN

THE

MANUAL

MAY

RESULT

IN

HAZARDOUS

RADIATION

EXPOSURE.

THE

COMPACT

DISC

PLAYER

SHOULD

NOT

BE

ADJUSTED

OR

REPAIRED

BY

ANYONE

EXCEPT

PRO-

PERLY

QUALIFIED

SERVICE

PERSONNEL.

TO

PREVENT

FIRE

OR

SHOCK

HAZARD.

CAUTION

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

RAIN

RISK

Sond

one

OR

MOISTURE

CAUTION:

TO

REDUCE

THE

RISK

OF

ELECTRIC

SHOCK,

LASER

SAFETY

DO

NOT

REMOVE

COVER

(OR

BACK)

ae

x

;

NO

USER-SERVICEABLE

PARTS

INSIDE

This

unit

employs

a

laser.

Only

a

qualified

service

person

REFER

SERVICING

TO

QUALIFIED

SERVICE

PERSONNEL

should

remove

the

cover

or

attempt

to

service

this

device,

due

to

possible

eye

injury.

“CAUTION—USE

OF

CONTROLS

OR

ADJUSTMENTS

The

lightning

flash

with

arrowhead

symbol,

OR

PERFORMANCE

OF

PROCEDURE

within

an

equilateral

triangle,

is

intended

to

OTHER

THAN

SPECIFIED

HEREIN

MAY

alert

the

user

of

the

presence

of

uninsulat-

RESULT

IN

HAZARDOUS

RADIATION

ed

‘‘dangerous

voltage’

within

the

.

pro-

EXPOSURE.”

duct’s

enclosure;

that

may

be

of

sufficient

magnitude

to

constitute

a

risk

of

electric

shock

to

persons.

;

The

exclamation

point

within

an

equi-

DANGER:

invisibte

LASER

RADIATION

WHEN

OPEN.

AVOID

DIRECT

istelal

tanuld

ie

imiedded

th

valet

whe

uier

EAE

OSU

EE

OEE.

of

the

presence

of

importamt

operating

CAUTION

:xazaroous

LASER

RADIATION

and

maintenance

(servicing).

instructions

in

WHEN

OPEN

ANU

iNTERLOCK

DEFEATED

the

literature

accompanying

the

appliance.

ATTENTION:

ravonnement

LASER

DANGEREUX

SI

QUVERT

AVEC

LENCLENCHEMENT

DE

SECURITE

ANNULE.

MAKE

SURE

TO

ROTATE

THIS

APPARATUS

TO

“RELEASE”

POSITION

BEFORE

POWERING

ON

THE

UNIT.

RELEASE

V/

AN

eae

GENERAL

SPECIFICATIONS

Digital

audio

disc

(Compact

disc)

player

A.

Controls

1)

2)

3)

4)

5)

6)

7)

8)

9)

10)

11)

Power

Open/close

Play/pause

Stop

Fast

forward

Fast

backward

Music

(track)

search

Repeat/Memory

Program

store

Program

cancel

Display

select

B.

Indicators

1)

2)

3)

4)

5)

»

6)

7)

Music/elapse

time

Play/pause

Memory

Repeat

(one)

Repeat

(all)

Repeat

(A-B)

Power

C.

System

1)

2)

3)

4)

5)

6)

Pick

up

Error

collection

D/A

converter

Filter

Disc

loading

Random

memory

D.

Terminals

1)

2)

Output

AC

input

E.

Mechanical

1)

2)

Dimension

Weight

F.

Others

1)

2)

3)

Power

supply

Power

dissipation

Regurations

Push

(cyclic)

Push

(cyclic)

Push

2-push

(up/down)

Push

(off/memory/one/all/A-B

cyclic)

Push

(cyclic)

4

dig.

7

seg.

LED

Green

(10mm/7.6mm

high)

LED/red

(flash

when

pause)

LED/red

3

beam

laser

pick

up

CIRC,

Double

error

collection

High

speed

16

bit

linear

Digital

filter/LC

filter

Drawer

type,

horizontal

loading

Random

program

memory

max

16

music

2-Plug

with

wire

SPT-1

cord

(black)

with

2

plug

350(W)

x

80(H)

x

295.5(D)

3.3Kg

AC

120V,

60Hz

(US,

CA)

220V,

50Hz

(E)

240V,

50Hz

(UK,

AUS)

100V,

60Hz

(J)

10W

UL1270,

CSA,

FCC

Digital

audio

disc

(Compact

disc)

player

Item Unit

S/N

ratio

Channel

separation

1K

a

Channel

balance

1K

Frequency

response

20Hz

to

18KHz

5.

|

De-emphasis

Nominal

92

16K

6.

|

Harmonic

distortion

1K

Output

voltage

1K

ce

FF/FB

mute

level

8.

|

Wow

&

flutter

o1

@

Allitems

are

measured

w/o

pre-emphasis

unless

otherwise

specified.

@

Test

disc

:

SONY

YEDS-7

disc

or

equivalent.

@

Load

impedance

:

100K

ohm/ch.

@

Power

supply

:

AC

120V

+/—2%,

60Hz.

(US,

CA)

220V

+/—2%,

SOHz.

(E)

240V

+/2

2%,

50Hz.

(UK,

AUS)

100V

+/—2%,

60Hz

(J)

Saw

Say

DISASSEMBLY

INSTRUCTIONS

1.

TOP

COVER

REMOVAL

Remove

Screws

(1)

(4

pes)

from

the

TOP

COVER

and

lift

it

up

(in

the

direction

of

the

arrow).

2.

TRAY

PANEL

REMOVAL

(1)

Open

the

tray

by

pressing

the

open/close

button.

(2)

Turn

unit

over

and

put

it

on

a

soft

cloth.

(3)

Push

plastic

tab

to

inner

side

and

pull

TRAY

PANEL

out.

(4)

Repeat

step

(3)

for

releasing

the

other

side

of

plastic

tab.

=

h—

3.

FRONT

PANEL

REMOVAL

\

(1)

Following

procedures

of

TOP

COVER

REMOVAL

and

TOP

PANEL

REMOVAL.

(2)

Remove

screws

(2)

(5

pes)

from

the

FRONT

PANEL.

(3)

Pull

FRONT

PANEL

out.

(in

the

direction

of

arrow).

4.

DISC

TRAY

REMOVAL

(1)

Following

procedures

of

TOP

COVER

REMOVAL.

(2)

Open

the

tray

by

pressing

the

open/close

button.

(3)

Release

hook

of

tray

from

the

rail

and

pull

tray

out.

5.

CD

DECK

PORTION

REMOVAL

(1)

Following

procedures

of

TOP

COVER

REMOVAL

and

TRAY

PANEL

REMOVAL.

(2)

Remove

screw

()

(4

pcs)

from

the

CD

DECK.

(3)

Remove

Connector

(4

pcs)

from

the

MAIN

PCB.

(4)

Pull

CD

DECK

out

carefully.

6.

MAIN

PCB

REMOVAL

(1)

Following

procedure

of

TOP

COVER

REMOVAL.

(2)

Remove

screw

()

(4

pes)

and

connectors.

(3)

Pull

MAIN

PCB

out

carefully,

7.

CONTROL

PCB

REMOVAL

8.

BACK

LID

REMOVAL

(1)

Following

procedure

of

TOP

COVER

REMOVAL.

(1)

Following

procedure

of

TOP

COVER

REMOVAL.

(2)

Remove

screws

(5)

(1

pcs)

from

the

CONTROL

PCB.

(2)

Remove

screws

(6)

(4

pcs)

and

pull

BACK

LID

out.

(3)

Release

plastic

tab

(6

pcs)

and

pull

CONTROL

PCB

out

carefully.

RCA

Jack

Se

CIRCUIT

DESCRIPTION

1C403

1C301

Optical

system

block

D/A

Converter

Filter

Amp

Servo

Control

EFM

Demoduration

Error

Correction

Servo

Amp

eS

|

Compact

disk

1C405

Displays

and

Keys

LINE

OUT

System

Control

This

unit

is

configured

as

shown

in

the

block

diagram

above.

The

!C403

is

the

heart

of

the

circuitry,

and

the

[C405

is

the

man/machine

interface

e.g.

upon

pressing

the

PLAY

button

it

enters

the

routine

for

activating

the

Play

Mode,

sending

the Play

command

to

the

1C403

and

entering

the

Play

Mode

A

compact

audio

disc

stores

musical

information

in

digital

form.

This

information

is

read

back

from

the

disc

by

a

laser

beam.

Variation

in

the

beam

reflected

from

the

disc

is

then

converted

into

analog

signals.

Below

discuss

how

the

information

on

the

disc

is

converted

into

the

original

audio

signal.

The

variation

in

reflection

of

the

laser

beam

are

read

as

variations

in

the

current

by

the

photo

diode

in

the

pick-

up

section

(by

using

the

characteristics

of

the

photo

diode

and

that

the

current

changes

according

to

the

amount

of

the

light

falling

on

to

it),

and

then

converted

into

a

current

signal.

This

current

signal

is

added

to

the

1IC501

together

with

signals

containing

tracking

and

focus

error,

if

detected

by

the

photodiode.

These

signals

are

then

amplified

by

the

1C501

and

output

to

the

terminal

26.

These

signals,

called

EFM

signal,

contain

not

only

musical

information

but

also

a

sync

signal,

information

on

time

and

address

called

Q

data,

and

CRC

check

signal.

The

signa!

are

then

applied

to

the

1C403,

where

they

are

immediately

stored

in

the

RAM.

Next,

they

are,

when

read

back

from

the

RAM,

further

divided

into

individual

units

of

original

information,

being

checked

for

data

errors

through

the

cyclic

redundancy

check.

Any

erroneous

data

is

thus

rewritten.

Of

these

unit

of

information

only

the

musical

information

is

sent

to

the

D/A

converter,

1C301,

which

converts

16-bit

data

input

in

2's

com-

plement

form

to

an

analog

signal

containing

13-bit

mantissa

with

7-bit

exponent

which

are

proportional

to

the

input

digital

signal.

The

analog

signal

thus

generated

by

the

D/A

converter

is

then

sent

to

a

sample

and

hold

circuit

that

is

an

analog

switch

built

in

the

1C301,

before

being

added

to

the

low

pass

filter.

Music

recorded

on

the

disc

is

thus

played

by

repeating

the

above

sequences

for

the

left

and

right

channels

alter-

nately.

ADJUSTMENT

PROCEDURE

OSCILLO

SCOPE

SETTING

TIME

0.5

psec/div.

VOLT

5O0mV/div.

1.

Skew

Angle

Adjustment

*The

following

procedures

are

to

be

required

only

after

replacing

the

pick-up.

|

MODE

|

AUTO

1)

Open

disc

tray

by

pressing

OPEN/CLOSE

button.

2)

Load

test

disc

(SONY

YEDS-18)

and

play

70-80

track.

3)

Observing

4th

of

TP2

on

the

oscilloscope.

Adjust

the

skew

adjustment

screw

until

the

jitter

meter

shows

the

minimum

level.

When

the

proper

level

is

obtained.

Apply

thread

adhesive

to

the

screw.

When

the

jitter

meter

is

not

used:

4)

Observing

4th

of

TP2

on

the

oscilloscope.

Adjust

the

skew

adjustment

screw

until

a

clear

trace

of

waveform

pattern

as

shown

in

Fig.

2

appear

on

the

oscilloscope.

When

the

proper

level

is

obtained.

Apply

thread

adhesive

to

the

screw.

ey

Aa

2.

Grating

Adjustment

*The

following

procedures

are

to

be

required

only

after

replacing

the

pick-up.

1)

2)

3)

4)

As

shown

in

Fig.

3,

connect

4P,

6P,

8P

and

clip

of

the

tester

to

CN4,

CN3, CN2,

and

C518

of

the

main

PCB

incorporated

in

the

player,

respectively.

Turn

on

the

power

to

the

CD

player,

and

insert

the

test

compact

disc

(SONY

YEDS-18)

(The

disc

will,

then,

not

rotate)

Turn

on

the

power

to

the

tester

(the

test

compact

disc

then

rotates)

and

press

SERVO

SW

ON.

While

holding

down

the

PLAY/PAUSE

buttons

on

the

CD

Player,

observe

the

waveforms

of

both

CH1

and

CH2

test

points

appearing

on

the

oscilloscope,

and,

at

the

same

time,

adjust

the

grating

adjustment

screw

of

the

pick-up

(see

Fig.

5)

until

the

waveforms

shown

in

Fig.

4

are

observed.

Caution:

During

Step

4

PLAY/PAUSE

button

must

be

depressed

and

held

down,

or

the

laser

will

be

turned

off

in

12

seconds.

5)

6)

Press

SERVO

SW

once

again

to

turn

off.

Observing

the

Lissajous

patterns

of

tester

CH1

and

CH2,

adjust

the

grating

adjustment

screw

attached

to

the

pick-up

until

the

phase

shift

in

CH1

and

CH2

becomes

180

degrees

*see

Fig.

6).

Make

sure

that

the

waveform

observed

in

Step

4

above

concurrently

appears

on

the

oscilloscope.

If

it

does

not,

restart

from

Step

4.

When

the

proper

level

is

obtained.

Apply

thread

adhesive

to

the

screw.

Fig.

2

MAIN

PCB

TESTER

OSCILLOSCOPE

Fig.

3

GRATING

ADJUSTMENT

MECHANISM

NL”

CH2

3V

CH2

3V

CH1

25mV

CH1

25mV

_—

Ye

7

or

Fig.

4

GRATING

ADJUSTMENT

SCREW

Fig.

5

PICK-UP

PHASE

DIFFERENCES

a.

180°

b.

90°

c.

0°

Fig.

6

ADJUSTMENT

SHOULD

BE

MADE

AS

Fig.

6-a

(CH1,

CH2

LISSAJOUS

PATTERN)

OSCILLOSCOPE

SETTING

PROBE

|

1:1

10:1

TIME

5

psec/div.

|

5

usec/div.

VOLT

|

10

mV/div.

1V/div.

INPUT

|

AC

IN

TRIG

|

CH1

IN

TRIG}

CH1

MODE

|

AUTO

3.

VCO

(Self-running

oscillating

frequency)

Adjustment

1)

2)

3)

Turn

unit

power

on.

Connect

4th

and

3rd

(GND)

of

TP2

by

short

pin.

Observing

2nd

of

TP1

on

the

frequency

counter.

Adjust

L401

until

the

frequency

counter

reading

4.3218MHz

(4.3218-4.323).

4,

EF

Balance

Adjustment

*The

following

procedures

are

required

after

replacing

the

pick-up

1)

2)

3)

Connect

fead

of

C518

(Lead

which

is

Connected

with

12

of

1C501)

to

ground.

Load

the

test

disc

(SONY

YEDS-18)

and

press

the

play

button

(and

hold

until

adjustment

is

completed).

Observing

2nd

of

TP3

on

the

oscilloscope.

Adjust

SF505

unti!

both

positive

and

Negative

peaks

of

the

waveform

becomes

equal

at

OV

level.

5.

SERVO

GAIN

ADJUSTMENT

5-1

1)

2)

3)

5-2

1):

2)

3)

Focus

Gain

Adjustment

Input

a

sine

wave

of

900Hz,

50mV

rms

to

1st

and

2nd

of

TP2

(1st

+

2nd

—).

Load

test

disc

(SONY

YEDS-18})

and

playback

track

1.

Observing

1st

and

2nd

on

the

VTVM.

Adjust

SF503

until

both

meter

shows

equal

value.

Tracking

Gain

Adjustment

Input

a

sine

wave

of

1.2KHz,

50mV

rms

to

1st

and

2nd

of

TP2

(1st

+

2nd

—).

Load

test

disc

(SONY

YEDS-18)

and

playback

track

1.

Observing

1st

and

2nd

on

the

VTVM.

Adjust

SF504

until

both

meter

shows

equal

value.

OSCILLOSCOPE

SETTING

TIME

VOLT

5

mV/div.

INPUT

6.

Offset

Adjustment

The

following

procedures

do

not

requir

the

tester.

6-1

Focus

offset

adjustment

1)

Turn

on

the

power

to

the

CD

Player,

and

place

the

CD

Player

in

the

stop

state.

2)

Observing

the

waveform

of

test

point

R570

of

the

main

PCB

on

the

oscilloscope,

adjust

SF501

unti!

the

amplitude

of

the

Positive

and

negative

peaks

of

the

waveform

becomes

equal

at

OV

level,

Se

MAIN

PCB

OSCILLOSCOPE

SETTING

OSCILLOSCOPE

FOCUS

OFFSET

ADJUSTMENT

|

.

i

MLN

aly

it

TTT

HH

|

Re

.

62

Tracking

offset

adjustment

1)

Turn

on

power

to

the

CD

Player,

and

place

it

in

the

stop

state.

2)

Observing

the

waveform

of

test

point

R564

on

the

main

PCB,

adjust

SF502

until

the

amplitude

of

the

Positive

and

negative

peaks

of

the

waveform

becomes

equa!

at

OV

level.

MAIN

PCB

OSCILLOSCOPE

SETTING

OSCILLOSCOPE

TRACKING

OFFSET

ADJUSTMENT

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ACTION

FLOW

CHART

POWER

ON

:

PLAY

POWER

ON

TRAY

CLOSE

PICK

UP

MOVES

TO

INNER

SIDE

x

}

+

To

Cc

Co

a

is)

+

2

o

2

5

ae

®

2

®

a

Defective

1C403.

Defective

1C301.

Defective

1C101,

201

and

circumference

circuit.

TRAY

OPEN

PICK

UP

MOVES

TRAY

OUT

SW

INNER

SIDE

ON

NO

YES

NO

PICK

UP

INNER

SIDE

YES

LASER

POWER

ON

0.25mW

FOCUS

SEARCH

FOCUS

LOOP

OFF

FOCUS

COIL

ACTIVE

YES

Check

output

pulse

at

65

1C403.

x=

oO

oc

a

Oo

-

e

oo]

a)

c

2

nn

2

ue]

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x

[a]

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a

°

N

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£

3.

=

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x)

c

2

nn

et

3

Q

g

5

o

Pa

3

2

&

a

oO

°

~

NS

©

nw

—

joe

~

©

ib)

ee

S

a

”

S

jos

r=

=]

°

x

[+]

®

=

oO

©

fo)

st

Oo

te

°

STOP

NO

LASER

OFF

|

YES

DISC

MOTOR

ROTATE

”

oO

o

_

be

.°]

°

2

”

3

Q.

P=)

3

°

no)

is

S

fe)

wn”

YES

DISC

MOTOR

CLV

CONTROL

(PWM

MODULATION)

SAA

JISNW

LASAYd

dO

ON

LSYis

F

AONL

YOUYIW

ON

44O

TDYL

LNdino

TOL

GHYL

—d>

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YO

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T9YuL

GHYL

—d>

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LADY

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ONV

SWIL

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ON

LON

JISNW

AO

YAEWAN

IWLOL

AV1dSI0

NOILVWHYOANI

o0L

HOYVAS

001

AV1dSI0

ale,

RMINAL

DESCRIPTION

TE

PXO/SC

PED

Clock

pulse

output

for

YM3805

data

PX1/SOB

(SO)

Output

for

instructions

to

YM3805

PX2/SOA

Reserved

PX3/S!

Accepts

responses

in

reply

to

instructions

upon

completing

execution

(S1)

of

instruction

from

YM3805

PDO

~

PD3

(PGO

~

PG3)

Input

of

operation

keys

Determines

the

pick-up

is

located

at

the

innermost

position

of

the

compact

disc

Detects

the

disc

tray

is

closed

Detects

the

disc

tray

is

open

YM3805

data

WQ

signal

input

YM3805

R/W

control

signal

output

Turns

the

laser

diode

on

and

off

Closes

the

disc

tray

Open

the

disc

tray

Px0/SC

0

PX1/SOB

0

PX2/S0A

0

PX3/SI

0

PDIO

PDIo

PD2

0 o

RST

PD3

o

OEXTAL

PCO

4

OXTAL

PCI

CXP5034

Oo

PG3

PC2

0

PG2

PC3

oPG1

PBO

©

PGO/INT2

PB1

PF3

PB2

©

PF2

PB3

Oo

PFI

PAQ

oO

o

PFO

PAI

o

PE3

PA20

oO

PE2

PA3

0

OPEL

Vss

O

PEO

N77

NO.

NAME

Functions

NEW

CXP5034

PAO

~

PA2

OUT

|

Output

pins

for

display

7-segment

LEDs

(D702

to

D704)

(PDO

~

PD2)}

ae

Be

OUT

|

Output

pins

for

turning

on

operation

key

indicators

(D705

to

D709)

Output

pins

for

displaying

7-segment

LEDs

(D701

to

D704)

Reserved

Output

pins

for

operation

key

digit

signals

PEO

~

PE3

PFO

~

PF2

te

~PA3

PBO

~

PB2

PGO

~

PG2

(PDO

~

PD2)

XTAL

EXTAL

INT1

PY2/WP

PY3/EC

Output

for

displaying

7-segment

LED

(D701)

Clock

input

(4.3218MHz)

Reset

input

pin;

initialized

when

power

is

turned

on

eee

fe

Power

input

Power

input

DESCRIPTION

OF

FUNCTIONS

(Assignment)

YM3805

Designation

Fametion

Q-code

Output

Input

14.

FZC

-

FRF,

and

Output

FCS

Focus

Servo-mechanism

Input

16

HF,

and

17

TER

Output

19

TROF,

20

TRGL,

21

TRHD,

22

KP+,

and

23

KP—

24

FEOF,

25

FEM+,

and

26

FEM—

Tracking

Servo-mechanism

Feed

Servo-mechanism

40A0

~

53A10,

51

WE,

52

OE,

and

54D8

~

61D1

RAM

Connection

75

XFSY

Crystal

Clock

SYNC

Signal

73

EFLG

Ci

and

C2

Error

Correction

Check

Signal

34

62,

66

SDO,

67

SDSY,

eas

DATA

Control

Circuit

-

Serial

Signal

Output

69

TESTA,

and

71

TESTC

65

O

OUT,

64

OSYNC,

76

SAMP1,

77

SAMP

2

ae

DAC

Interface

68

64,

and

63

DFOF

69

TEST,

70

TEST,

71

TEST,

18

TEST

D,

and

=r

Test

Pins

8

TCL

[ae

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Non,

Me

9

=

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N

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<

m

mH

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<

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VFSY

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TESTS

TESTB

TESTA

OUT

osst

ga

DIN

o67[{

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toes|

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o6s|[

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oo

O09

O92

G6 82

GF GG

89

8

oc

0

6

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0

6

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Tensai TAD-30 User manual

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