Sharp Cd-jx20x(gy) User manual

SHARP

SERVICE

MANUAL

SYOCPCDJX2OXY

CD=JX20X(GY)

l

In

the interests

of

user-safety the set should

be

restored to

its

original condition and only

parts

identical to those specified

be

used.

INDEX TO CONTENTS

.........

SPECIFICATIONS

.................................

AC

POWER

SUPPLY

CORD

AND

PLUG

..............

CAUTIONS

ON

HANDLING

THE

UNIT

................

NAMES

OF

PARTS.

...............................

OPERATION

MANUAL

DISASSEMBL?

.............................

REMOVING

AND

REINSTALLING

THE

MAIN

PARTS’

:

ADJUSTMENT

....................................

TROUBLESHOOTING

(CD

SECTION)

................

FUNCTION

TABLE

OF

IC

..........................

BLOCK

DIAGRAM

.................................

LCD

SEGMENT

...................................

TYPES

OF

TRANSISTOR

AND

LED

.................

NOTES

ON

SCHEMATIC

DIAGRAM

..................

WAVE

FORMS

OF

CD

CIRCUIT

.....................

SCHEMATIC

DIAGRAM/WIRING

SIDE

OF

P.W.

BOARD

.

EXPLODED

VIEW..

...............................

REPLACEMENT

PARTS

LIST

.......................

.........

...........

..........

...........

..........

...........

..........

Page

.

2

.

2

.

2

.

3-5

6-12

13-15

16,17

18-22

23-26

27-34

35-38

.

39

.

40

.

41

.

42

43-60

61-64

65-74

SHARP CORPORATION

l

General

Power

source:

Output

power:

Speakers:

Input

impedance:

Load

impedance:

Dimensions:

Weight:

0

Radio

section

Frequency

range:

FOR

A

COMPLETE

DESCRIPTION

OF

THE

OPERATION

OF

THIS

UNIT,

PLEASE

REFER

TO

THE

OPERATION

MANUAL.

SPECIFICATIONS

AC

240

V,

50

Hz

(For Australia)

AC

110

V,

60

Hz

(For

Taiwan)

AC

220

V,

50160

Hz

(For

other

areas)

DC

15

V

[“D”

size (UMSUM-1,

R20

or

HP-2)

battery x

lo]

DC

3

V

[“AA”

size (UMSUM-3,

R6

or

HP-7)

battery x

2

for

clock/memory battery]

PMPO;

40

W

(20

W

+

20

W)

(AC

operation)

MPO;

28

W

(14

W

+

14

W)

(AC

operation)

RMS;

15

W

(7.5

W

+

7.5

W)

(DC

operation,

10%

distortion)

10

cm

(4”)

full

range

speaker

x

2

Mixing

mic;

600

ohms

Auxiliary

in;

50

k

ohms

Headphones;

16-50

ohms

(recom-

mended

32

ohms)

Width;

580

mm

(22-13/16”)

Height;

195

mm

(7-l

l/16”)

Depth;

238

mm

(9-318”)

6.5

kg

(14.3

Ibs.)

without batteries

FM;

88-108

MHz

(100

kHz

span)

AM;

531-1,602

kHz

(9

kHz

span)

AC

POWER

SUPPLY CORD

AND

PLUG

0

Tape

deck

section

Tape: Compact

cassette tape

Motor:

DC

motor

x

1

Head:

TAPE-l:

Playback x

1

TAPE-2:

Record/playback x

1

Erase

x

1

Tape

speed: 4.76

cm/set

(l-7/8

ips.)

Bias

and

erasure system:

AC

@

Compact

disc

player

section

Type: Compact disc player

Signal

readout: Non-contact,

3-beam

semi-conduc-

tor laser

pickup

Rotational

speed: 200

-

500

rpm

CLV,

Approx.

Error

correction: CIRC

(Cross

Interleave

Reed-So-

lomon

Code)

Audio

channels:

2

Decoder:

i6-bit

linear quantization

Filter:

4

times oversampling

16

bit digi-

tal

filter

Frequency

response:

20

-

20,000

Hz(+i/-3

dB)

Wow

and

flutter: Unmeasurable (less than 0.001%

W.

peak)

Specifications for this

model

are

subject

to

change

without

prior

notice.

QACCL0059AFOO

(For

Australia)

.

QACCK0053AFZZ

(For

other Areas)

QACCZb062AFOO

(For

Taiwan)

CAUTIONS

ON

HANDLING

THE

UNIT

l

Dew

condensation

You

know

such

phenomenon

that,

in

winter,

a

windowpane

of

the

heated

room

develops

some

amount

of

dews

on

its

surface.

This

phenomenon

of

dew

condensation may

also

occur

at

the

object

lens

in

the

pickup

unit

in

the

following

instances.

l

When

the

compact

disc

player

is

operated immediately after

you

have

turned

on

a

heating

device

in

your

room.

l

When

it

is

operated

in

a

room

full

of

wet air

(with

steam

or

moisture).

l

When

it

is

operated

in

a

warm

place

to

which

it

has

been

moved

from

a

rather

cold

place.

If

the

object

lens

has

some

amount

of

dew

condensed

on

it,

the

compact

disc player

may

fail

to

operate correctly

as

it

can’t

read

out

the information data

recorded

on

the

disc

surface.

If

such

occurs,

remove the

compact

disc from the

disc table,

turn

on

the power

switch

and

leave

the

unit for

some

time

(about

1

hour

at

the

longest);

then

it will

resume

its

normal

operation.

-2-

NAMES

OF

PARTS

n

CD display section

123

4

5

23

24

25

-30

-31

35

36

37

1.

Pause indicator: II

2. Play indicator:

w

3. Track Number Indicator

4. Minutes and Seconds lndlcator

5.

MUSIC

Schedule Indicators

6. Programme Indicator

7. Random Play Indicator

0.

Total Time

lndxator

9. Auto Editinq Indicator

10. Tape Side indicators

11.

Aeoeat

Indicator:

c

12. Music Schedule Over Indicator:

&

n

Cloc!uTimerTTuner

display section

13.

Timer+

set

Indicator

14. On Time Indicator

15. Sleep Indicator

16. Time Adiust Indicator

17.

Memory’lndicator

18. Band/AM/PM Indicator

19. Radio and Clock lndlcator

20. Preset Channel Indicator

Zl.(TAPEI)

Cassette Compartment

22. (TAPE2) Cassette Compartment

n

Timerfhmer

control section

23. Remote Control Sensor

24. Band Selector Button

25. Tuning Up/Hour Button

26. Auto Memory Button

27. Display Button

28. Timer Set/Reset Button

29. Memory/Time Adjust Button

30. Tuning Down/Minute Button

31. Sleep On/Off Button

32. Main Power Indicator

33. Timer/Sleep Indicator

34. FM Stereo Indicator

n

Tape control section

35. Reverse Play Button and Indicator:

4

36. Stop Button:

B

37. Forward Play Button and Indicator:

b

38. Record Pause Button and Indicator:

0

II

39. Fast Wind/APSS Buttons:

M

/

w

40. One Touch Editing Buttons

41. Tape Mode Button and Indicators

1. Reverse Mode Switch

2. Timer Record Switch

3. FM Mode Switch

4. Funcbon Selector Buttons

5. Main Power Switch

6. Volume Control

7. Bass Control

8. Tone Control

n

CD control section

9. Auto Editing Button

10. Tape Length Selector Button

Il.

Pause Button

12. Stop Button:

n

13. Random Play Button: RANDOM XL

14. Track Up/Down Buttons:

w

/

m

15. Play/Repeat Button:

)

i

16. CD Eiect Button:

r(.

17. CD

Cbmpatiment-

q

Rear panel

18. Woofer duct

19. FM Telescopic Rod Aerial

20. AC Power Input Socket

21. Headohones Socket

22. Beat ‘Cancel Switch

23. Auxiliary Input Sockets

24. Mixing Microphone Socket

25. Battery Compartment

Notes:

0

D

O

not allow any objects to fall into or to be placed

I”the woofer duct

l

When

setting

up

thw

product, leave some dis-

tance between the wall and the speaker so that

you don’t muffle the woofer.

n

REMOTE

CONTROL

3----I

4\

5\

6--e-

7--

8----

9-----

lo-----

ll-

12-

13---

n

Names

of

controls

1.

Remote Control Transmitter Window

2. operate Button

0

Tuner control buttons

3. Presetl Buttons

4. Tuner Call Button

5. Band Selector Button

l

CD control buttons

6. Programme Button

7. Call Button

8. Clear Button

9. CD Call Button

10. Cue Button:

*

11. Review Button:

*

12. Pause Button: II

13.

Taoe

Lenath Selector Button

14.

Track

Number Input Buttons

15. Stop Button:

n

16. Play/Repeat Button:

b

5

17. Track Up/Down Buttons:

H1

I

H

18.

Random Play Button: RANDOM XL

19. Auto Editing Button

-14

---15

-16

-17

-18

---I9

\23

\24

125

\26

‘27

l

Tape control buttons

20. Tape Call and Tape

I/2

Select Button

0

This

lunchon

will change to TAPE when this button is pressed

once. After the

functvx-

has

chanoed

to TAPE. TAPE 1 or 2 can

then be selected by pressing the-button

agam.

21. Reverse Play Button:

4

22. Record Pause Button:

l

II

23. Forward Play Button:

b

24. Stop Button:

n

25. Fast Wind/APSS Buttons:

e

I

w

26. Volume Up/Down Buttons:

v

I

A

27. Auxiliary Call Button

OPERATION MANUAL

H

Proper

use

of

the

remote

control

SETTING

THE

CLOCK

Aim

(wIthIn

the

ranoe

of 30” with no obstacles1 the remote control at

the

remofe

control

&nsar

and operate as

sh&n

Notes concerning use:

l

Replace the batteries

If

control distance decreases or oper-

ation

becomes erratic.

b

PeriodIcally

clean the

transmitter

window on the remote

Control

and the sensor on the ma,”

““I,

wth a soft cloth

l

Exposmg

the

sensor

on the ma,”

un,t

to

strong light can

interfere

with

operation. Change lighting or the

dfrectlon

of

the

““,I

l

Keep the remote

conlrol

away from

moisture,

excessive

heat, shock, and

vrbralions.

l

The remote

controlls

usable

range

IS

between

0

2

m

(0.7

feet) and

6

m (20 feet) away from the sensor

l

Whilst the frequency Indicator on the tuner or the “ON TIME” in-

dicator

IS

11t.

press the DISPLAY button to

display

the

hme

1

~;i~;r;~;:“,“,t;~uT!ME

ADJ button, press the HOUR

but-

l

Press the HOUR button once lo advance the time by

1

hour Press

for more than 2 seconds

to

advance continuously.

“AM” changes

automatically

to “PM”.

l

On the

display,

midnight

I

?. “AM

12:Oo”

and noon is “PM 12.00~.

When

settmg

the

hme,

be careful not

10

confuse AM and PM.

2

Whilst pressmg the TIME ADJ button, press the MINUTE

button and set the time to 1 minute before the desired time.

. Press the MINUTE button once to advance the

hme

by

1

rmnute.

Press for more than 2 seconds to advance

con11nuousIy.

e

The hour setting wll not advance even

If

minutes advance from

“59” to

“00”.

3

Whilst pressing the TIME ADJ button, press the MINUTE

button once to start the clock at the correct time.

0

The

mmute

display will advance by one, and the clock

starls

oper-

atlng

from “0” seconds. (Seconds are not displayed.)

Note:

l

When setting the time, complete the procedure

withln

1

minute;

11

more than 1

minute

elapses, the “minute”

mdrcation

will advance.

l

When the current time and timer clock are not displayed, remove

the AC power lead, remove the clock/memory batteries, then

re-

inssIt them. Then, re-connect the AC power

lead

-6-

RECORDING

0

When

recording important selections,

be

sure to make

a

prelimi-

nary test to ensure that the desired material

is

being properly

re-

corded.

l

The

ALC

(Automatic Record Level Control) circuit automatically

controls the level

of

the input signal

used

for recording.

l

The VOLUME,

TONE

and

BASS

controls may

be

adjusted with

no

effect

on

the recorded level. (Variable

Sound

Monitor)

W

Recording from the

built-in

CD

player

(CD

Svnchronised Recording

System)

1

Set

the

MAIN

POWER

switch

to

ON.

2

Press

the

CD

button

and

load

the

CD

to

be

recorded.

3

Load

acassette

into

the

TAPE

2

cassette

compartment.

0

Wind

the beginning part of the tape

on

which recording

can

not

be

performed.

z

4

Set

the

REVERSE

MODE

switch

to

z

to

record

on

only

one

side, or

to

3

for

continuous

recording

on

both

sides.

5

Press

the

REC

PAUSE

(011)

button.

0

The

REC

PAUSE

indicatdrjights

up

and

the

PLAY

indicators

flash.

6

Press

the

PLAY/REPEAT

(,

c)

button.

0

Before

CD

playback begins, recording automatically begins

from

side A

of

the tape.

To

interrupt

recording:

1

Press

the

PAUSE

(II)

button

on

the

CD.

2P

ress

the

PLAY/REPEAT

(k

c)

button

to

resume

recor-

ding.

To

stop

recording:

Press

the

STOP

(B) button

on

the tape.

(At

this time,

CD

playback does not

stop.)

4

6

2

7

6

n

To

edit

tracks

dividing

them

to

side

A

and side

B

automatically

(Auto

editing

function)

To

use

tapes effectively, tracks

on

a

CD

are automatically divided

between side

A

and side

B

and edited.

When

the desired tracks are selected

in

programme selection, the

tracks stored

in

memory are automatically divided between side

A

and

side

B.

1

Set

the

MAIN

POWER

switch

to

ON.

2

Press

the

CD

b

u

tt

on

and

load

the

CD

to

be

recorded.

3

Load

a

cassette

into

the

TAPE

2

cassette compartment.

l

Rewind

the tape onto the left-side

reel.

4

Set

the

REVERSE

MODE

switch

to

ZI.

5

Press

the

REC

PAUSE

(Oil)

button.

0

The

REC

PAUSE

indicator

lights

up

and

the

PLAY

indicators

flash.

6

Press

the

TAPE

LENGTH

button.

When

using

tapes other

than

C-46

Press

the

SKIP

(m)

or

SKIP

(Irr)

button

to

adjust the time (minute

by

minute).

0

“ClO”to

“C99”

can

be

set.

7

Press

the

AUTO

EDIT

button.

0

Tracks

on the

CD

are automatically divided between side

A

and

side

0.

0

The number of tracks, total time and track numbers to be recorded

on

side

A

and side

B

are displayed for approximately 4seconds.

(When

there are tracks which

can

not

be

recorded, the

TIME

OVER

indicator will light

up.)

8

Press

the

PLAY/REPEAT

(,

c)

button.

0

CD

playback and recording start approximately

9

seconds after

the tape

starts

(after the part

which

can

not

be

recorded

is

wound).

To

cancel

auto

editing

function:

Before

recording,

press the

STOP

(m)

button

on

the

CD.

To

stop

recording:

Press

the

STOP

(a)

button

on

the tape.

(At

this

time,

CD

playback automatically

stops.)

To

confirm

tracks to

be

recorded

and

tracks

which

can

not

be

recorded:

Before

recording,

press the

AUTO

EDIT

button.

c

Tracks to

be

recorded

on

side

A

1

Tracks to

be

recorded

on

side

B

Note:

0

Once

CD

playback

starts,

the display does not change.

-8-

0

0.n

0

0000

on00

0

00

H

Dubbing

0

Try

to

use

the same tape formula and length for the recording

tape

as

for the master tape.

1

Set

the

MAIN

POWER

switch

to

ON.

2

Press

the

TAPE

button.

3L

d

oa a

prerecorded cassette

into

the

TAPE

7

cassette

com-

partment.

Insert ablank

tape

into

the

TAPE

2

cassette

compartment.

4

Set

the

REVERSE

MODE

switch

to

z

to

record

on

only

one

side,

or

to

3

for continuous

recording

on

both

sides.

5

Press

the

ONE

TOUCH

EDIT

button.

0

Press

“NORMAL”

to

edit

at

normal

speed,

and

“HIGH”

to

edit

at

twice the normal speed.

0

Editing

will

begin with side

A.

To

stop

dubbing:

Press

the

STOP

(U)

button.

0

TAPE

1

and

TAPE

2

simultaneously

stop.

After

dubbing

The indicator

of

the TAPE

1

2

button

is

automatically switched to

“2”.

Only when the tape

is

rewound and played

back,

the contents

currently dubbed

can

be confirmed.

Synchro-reverse

editing function

When

tapes which are different

in

length are

used

for recording and

editing continuously

on

both

sides,

as

soon

as

one tape finishes, the

other

is

automatically fast forwarded, and edition begins from the be-

ginning of the other

side.

-9-

-

BEAT CANCEL

4-

n

APSS

spacing

n

Recording

from

the

built-in

radio

IT

une

into

the

desired

station.

2

Load

a

cassette

into

the

TAPE

2

cassette

compartment.

3

Set

the

REVERSE

MODE

switch

to

z

to

record

on

only

one

side,

or

to

ZJ

for

continuous

recording

on

both

sides.

4

Press

the

REC

PAUSE

(WI)

button,

0

The

REC

PAUSE

indicator

lights

up

and

the

PLAY

indicators

flash.

5

Press

the

PLAY

k)

button

to

record

side

A,

or

the

PLAY

(4)

button

to

record

side

B.

0

For continuous recording

of

both

sides,

begin

on

side

A.

Recording

stops

automatically at the end

of

side 6.

Beat

cancel

switch

(on

the

rear

panel)

If

beating noise

occurs

with

AM,

set the

BEAT

CANCEL

switch

to

A,

B

or

C,

whichever gives the

best

reception.

n

Erasing recorded

tapes

APSS

requires

blanks

of

4-5

seconds between selections to function

properly. Make the blanks

as

follows.

1

Press the

REC

PAUSE

(all)

button

when

the selection

being

recorded

ends.

2

Press

the

AUX

button.

Note:

Du

not connect anything to the

AUX

sockets.

3

Press

the

PLAY

(b)

or

PLAY

(4)

button

of

which

its

indi-

cator

is

lit,

let

the

tape

run

for

4

-

5

seconds,

then

press

the

REC

PAUSE

(al)

button

again.

4

Press

the

TUNER

button.

5

Start the next

recording.

1

Load

the

tape

to

be

erased

into

the

TAPE

2

cassette

com-

partment.

2P

ress

the

AUX

button.

Note:

Du

not connect anything to the

AUX

sockets.

3

Set

the

REVERSE

MODE

switch

to

zz

to

erase only

one

side

and

to

ZJ

to

erase

both

sides.

4

Press

the

REC

PAUSE

(Oil)

button,

then

press

the

PLAY

(k)

button

to

erase side

A

of

tape,

or

the

PLAY

(4)

button

to

erase side

B.

-IO-

16

-’

b

Before setting the

timer

clock, make sure

that

the current time

bs

correct.

n

Timer

operation

To listen to the radio

You can

listen

to a broadcasting station wth the timer-on

function

different from that to

which

you are

lkstening

wth timer-off function.

However, the band should be the same

1Set the MAIN POWER switch to ON

2T

une into the desired station.

3

Press the DISPLAY button.

. The “ON TIME” Indicator goes on for 5 seconds.

4

Whilst the “ON TIME” mdicator is lit, and whilst pressing

the TIME ADJ button, press the HOUR and MINUTE but-

tons to set the desired time.

5

Whilst the “ON TIME” indicator is lit, select the desired

preset station on the remote control.

6

Set the TIMER REC

s&oh

to OFF.

7P

ress the TIMER button.

. The “TIMER SET” appears on the display.

This sets the

tmw

to the stand-by

conditlan

b

The radio turns on automatically at the preset

time.

.

When you listen to the

?.ame

broadcasting

slatron

with the timer-on

and timer-off

functions

to

which

you are listening, step 5 is

un-

To listen to the compact disc

1

Set the MAIN POWER switch to ON

2

Press the CD button

3

Load the disc.

4

Perform steps 3,4 and 6,7 of the “To listen to the radio”

sectloll.

. The

CD

playback statis automatically at the preset

time.

To playback a cassette

1Set the MAIN POWER switch to ON.

2

Press the TAPE button.

3

Load the recorded cassette tape into the TAPE 2 cassette

compartment,

4

Perform steps 3,4 and 6,7 of the “To listen to the radio”

section.

. Cassette playback starts

automatlcally

at the preset time.

t

i

n

W

Sleep

operation

The

radio,

compact

disc

and cassette deck can all be

automatically

turned

off after 60 minutes.

Press the SLEEP button.

To stop the sleep operation:

Press the SLEEP button.

(The SLEEP indicator wll go out.)

To record radio

programmes

You can record a

broadcasting

station

different

from that to

which

you are

listening.

However, the band should be the same.

1

Load a blank cassette tape into the TAPE 2 cassette corn-

partment.

2

Perform steps 1-4 of the “To listen to the radio” section.

3

Whilst the “ON TIME” Indicator

IS

lit, select the desired

preset station on the remote control.

4

Set the TIMER REC switch to ON.

5

Press the TIMER button.

0

The “TIMER SET” appears on the

display.

This sets the

timer

to the stand-by condition.

l

Recording starts automatically at the preset

tme.

b

When you record to the same

broadcastmg

station with the

timer-

on and timer-off

functions

to which you are

Ilstening.

step 3

is

unnecessary.

Notes:

l

The power wll be automatically turned off 2 hours after the

timer

starts.

l

To set the dewed volume level, use the VOLUME control before

setting the

timer.

To confirm the timer time setting:

Press the DISPLAY button

0

The tuner

will

keep accurate time until the clock/memory batteries

run

O”,

To cancel timer operation:

Press the TIMER button so that the “TIMER SET” in the

display

goes

out, or set the MAIN POWER switch to

(‘1

STAND-BY.

n

Timer

and

sleep

operation

1

Use the left procedure to confirm the sleep time

2

Set the timer time.

3P

ress the TIMER button. The “TIMER SET” appears on

the display.

b

The

function

wrll

not change, so the

function

which

you

were

IIS-

tening to

I”

the sleep

operatton

will

bqn

the timer

operabon.

Il-

-12-

I

DISASSEMBLY

Removing the CD mechanism

(81)X2

w

@xlZmm

Black

Caution on Disassembly

Follow the below-mentioned notes when disassembling ths

unit and reassemblmg it, to keep its safety and excellent per-

formance:

1. Take cassette tape and compact disc out of the unit.

2. Be sure to remove the power supply plug from the wall

outlet before starting to disassemble the unit.

3. Take off nylon bands or wire holders where they need

be removed when disassembling the unit. After servicing

the unit, be sure to rearrange the leads where they were

before disassembling.

4. Take sufficient care on static electricity of integrated cir-

cuits and other circuits when servicing.

--

3

L

4

REMOVAL

Front panel

‘1

PROCEDURE FIGURE

I.

Open the battery lid. 13-l

(Al)xl

2. Screw

(A2)x9

3. Open the cassette lid.

(A3)xZ

4. Socket (A4)xi 15-l

CD block

1.

screw

@1)x5

13-2,14-i

2. Socket (62)x2

14-Z

I. CD sew0

PWB

1.

Screw

(Ci)x4

14-2

2. Socket (C2)xl

3. Flexible PWB (C3)xl

2. CD mechanism 1. Screw..

@1)x3 14.2

Frame (with PWB) 1. Screw (El)x3

13-2,14-l

2. Socket lEZlx5

14.3,5

Tape mechanism

1. Screw

fF11x3

14-5

2. Socket iF2ix4

14-4

5

LCD

PWB

1. Screw (Gl)x6

14.1

2. Socket

(GZ)x2

3 Connector (G3)xl

6

CD switch

PWB

1. Knob..

ftillxl

14-s

Following the disassembling procedure, steps 1 and 2, remove

the CD mechanism.

Removing the frame (with main/CD switch/function

selection/volume/relay PWB)

Following the disassembling procedure, steps

1,

2, 3, remove

the frame.

Removing the tape mechanism

Following the disassembling procedure, steps 1 and 4, remove

the tape mechanism. However this procedure makes it difficult

wire treatment when assembling. Thera‘fore disassemble, fol-

lowing the steps

1,

2, 3, 4, (As for removal of main parts refer

to P.16

-

17)

Figure

14-l

CD mechanism

CD ~erw

PWB

(ClIX4

(A2)XZ

#3XlOnm

Figure 14-2

Figure

13-1

(E2)Xl

Figure 14-3

(F2)xl

Figure 14-4

(H2Ix4

CBXlOmm

Figure 13-2

-13-

Figure 14-5

(Jl)X6

ia3XlOmm

Figure

15-1

Rear cabinet

ILeft

Side\

Figure

15-2

-15-

REMOVING

AND

REINSTALLING

THE

MAIN

PARTS

TAPE MECHANISM SECTION

Perform

steps

1,

2,

3,

4,

5,

6,

and

7

of

the disassembly

method

to

remove

the

tape

mechanism.

Main/FF, Rewind Belt

(See

Fig.

16-l.)

1.

Remove the

main

belt,

(Al)

x

I

PC.,

at the tape

2

side

from

the

motor

pulley.

2.

Remove the

main

belt,

(A2)

x

1

PC.,

at the tape

1

side

from

the

motor

pulley.

3.

Remove the

FF/Rewind

belt,

(A3)

x

2

PCS.,

from

the

FF/Re-

wind

roller.

4.

Put

on

the belts

in

the reverse order

of

removal.

Note:

1.

When

putting

on

the belt, ascertain that the belt

is

not

twisted,

and

clean

it.

FWD

fl

REV fiywheel

FWD

flywheel

Figure

16-l

-

(Bl)X2

,I---!

$2X4mm

.a_*_-

Motor

(See

Fig.

16-2,

3)

1.

Remove

the

screw,

(Bl)

x

4

PCS.,

and

remove the

motor

fixture.

2.

Remove the

screw,

(B2)

x

3

PCS.,

and

remove the

motor.

Note:

1.

When

mounting the motor, pay

attention

to the motor

mounting

angle.

2.

When

the

motor

is

removed,

the

belt

comes

off.

Put

it

on,

referring

to

the

description of belt

putting-on.

Switch

PWB

(See

Fig.

16-4.)

1.

Remove

the

screw,

(Cl)

x

2

PCS,,

and

remove the

switch

protecting plate.

2.

Remove

the

screw,

(C2)

x

1

PC.,

remove solder joint

of

solenoid,

(C3)

x

4

PCS.,

and

remove the

switch

PWB.

Note:

1.

When

mounting

the

PWB,

ascertain that the photocoupler

transistor

does

not

contact

the

magnet

on

the reel

stand

and

keep

in

mind

that

the

switch exists between

it

and

FFlRewind lever.

Figure

16-2

Motor mounting.

bracket Motor

Figure

16-3

Switch

protect&

board

Switch PWB

Figure

16-4

-16-

How

to

remove

the flywheel

(See

Fig.

17-1.)

1.

Remove

the

drive

belt.

2.

Remove

the

stop

washer

(Dl)

with

a

small precision

screw-

driver

to

extract

the

flywheel

from

the

capstan

metal.

Note:

1.

When

the

stop

washer

is

deformed

or damaged,

replace

it

with

a

new

one.

Pinch

Roller

(See

Fig.

17-2.)

1.

Carefully release the

pinch

roller

dog

in

the

direction

indi-

cated

by

the

arrow

mark

@,and remove

the

pinch

roller,

(El)

x

1

PC.,

upward.

Removing

the

Record/Playback/Erase

Head

(See

Fig.

17-2,

4.)

1.

Remove

the

screw,

(Fl)

x

2

PCS.,

and

remove

the

head

base.

2.

Remove the

screw,

(F2)

x

2

PCS.,

and

remove the

head.

Cares

When

Mounting

the

Head

Mount

the

head

in

the position

shown

in

Fig.

17-4.

Be

sure to apply

screw

lock

after replacement

of

head

and

azimuth

adjustment.

CD

MECHANISM SECTION

Removing the optical pickup(See

Fig.

17-5.)

1.

Remove

4

pawls

(Gl)

and

remove cover

(G2).

2.

Remove

4

screws

(G3)

and

remove

2

shafts

(G4).

Clamp

(Gl)

X

(G3IX2

02.6

X8mm

(G2)xl

G3IX2

02.6x8mm

Figure

17-1

Flywheel

Pinch roller

\

n

Figure

17-2

metal

roller

,r-.

1”

*

7

(F2)x

2

11.6X5mm

spin

Figure

17-3

Tape Guide

0

m

I

0

Tape I Tape 2

Figure

17-5

-17-

Figure

17-4

ADJUSTMENT

As

for

adjusting

method

refer

to

the

relevant

explanation

in

Service

Manual

“ADJUSTMENT

PROCEDURES

OF

AUDIO

PRODUCTS”.

MECHANISM

SECTION

l

Driving

Force

Check

l

Torque

Check

Torque Meter

Play:

TW-2111

Reverse

Play:

TW-21

Fast

Forward:

TW-21231

Rewind:

TW-2231

Specified Value

Tape

1

Tape

2

30

to

60

g.cm 30

to

60

g.cm

30

to

60

g.cm 30

to

60 g.cm

70

to

140 70

to

140

g.cm g.cm

70

to

140

70to

140

g.cm g.cm

TAPE

SECTION

Position

of

each

switch

or control

Volume

Beat

cancel

Bass

Tone

Function

FM

modenape

selector

Max

A

Center

Tape/Stand-by

Stereo/Normal

i

l

Bias

Oscillation

Check

Specified value

Beat

cancel A:

104+77

kHz

B:

-4

+

2

kHz

for

A

C:

Same

as

AI

l

Erase

Current

Check

Specified value

Resistor

for measurement: Normal:

75

i

30

mV

1

ohm

Cr02:

100

f

30

mV

t

.

Metal:

175

i

35

mV

l

Head

Azimuth

Test Tape

Ml-T-114

Instrument Connection

1

Headphones Socket

1

(Load resistance:

32

ohms)

l

Tape

Speed

*

ohms)

Make

adjustments

to

TAPE

2(FWD

side),

and

only

check

the

settings

of

TAPE

1.

[TAPE

mx

PWB-DJ

Figure

18-1

REMOVAL

OF

CASSETTE

HOLDER Figure

18-2

ADJUSTMENT

POINTS

-18-

TUNER

SECTION

fl-:Low-range

frequency

fH:High-range frequency

l

AM

IF/RF

Adjustment Adjusting part Setting

IF

CF3

[Optimize

IF

waveform.

Frequency cover

fL:L2

(531

kHz) fL:

1.1

f

0.1

v

(Pin

6

of

TUNl

Vt fH:

7.2

+

1.0

V

line voltage)

-

0.5

v

(fH

needs only

check.)

Tracking

fL:

L3

(603

kHz)

Raise speaker

fH:

TCl

(1,404

kHz)

terminal output

up

to maximum.

l

FM

IF/RF

Test Stage

Detection

1

Adjusting point Specified

Value/adjusting

method

Tl

(98

MHz,

60

dB)

0

*

30

m

V(DC)

l

FM

Autostop

Sensitivity

Signal oscillator Adjusting part

Mono

30

dB

VRI

(98

MHz)

Adjusting method

Adjust to the place

where change from

3

V

to

0

V

occurred.

l

VCO

Frequency

Signal oscillator Setting Adjusting part

No

modulation

VU2

19

kHz

+

100

Hz

l

Adjusting

signals

Frequency Modulation Modulation Antenna input

frequency /factor level

TI

FM

monaural

98MHz

FM

stereo 400Hz

225kHzdev

60dB

98MHz

1,OOOHz *1

160dB

‘1Max. frequency deviation

is

67.5 kHzdev

in

case of

SSG

output mode

MAIN.

Frequency deviation caused only

by

SSG

pilot signal

is

7.5

kHzdev.

ELECTRONIC

AM

SIGNAL

BAR

ANTENNA

IC2

VOLTMETER

GENERATOR

PIN12

UNIT

0

GND

LOOP

ANTENNA

Figure

19-I

AM

IF

ELECTRON

I

C

CNP3 VOLTMETER

cl

0

Figure

19-2

FM

IF

FM

SIGNAL

ELECTRON

I

c

GENERATOR

ROD

:.

VOLTMEl-ER

ANTENNA BOTti

SIDE

-

“I

I

Figure

19-3

FM

AUTO

STOP

SENS.

FM

S

IGNAL.

A,,,;;;,,

GENERA

rOli

-

I

FREWNCY

COIJNTER

75onm

DUMMY

Figure

19-4

VCO

FREQUENCY

AM

TRACKING

flj

1

TUNER

PWE

STOP

SENS.

-

AM

FREQUENCY

COVERAGE

fL

CNP3

Figure

19-5

ADJUSTMENT

POINTS

1

FM

DET.

1

-19-

CD

SECTION

As

for preparation for

adjustment,

adjustment

method

and

optical

pickup

replacement

method

refer

to

the

Service

Manual

(Audio

Equipment

Adjustment).

1

.Preparation for Adjustment

Be

sure

to

refer

to

the Service

Manual

“Audio

Equipment

Adjustment”.

Setting

the

Test

Mode

Test Mode

TEST

MODE

0

Setting

Method

Remarks

Pressing

simultaneously the

“RAMDOM”and

“SKIP”

buttons, All

the

segments

light

for

2.0

seconds

and

then the Test Mode

set

the

input

selection

switch

to

0

indication appears.

“CD”.

TEST

MODE

1

In

TEST

MODE

0

press

once

the

PLAY

button.

(1st)

Laser

lights.

t

TEST

MODE

2

In

TEST

MODE

1

press once

the

PLAY

button.

(2nd) Focus

start

(Servo

ON)

TEST

MODE

3

In

TEST

MODE

2

press once

the

PLAY

button.

(3rd) Disc

rotates.

(Spin

servo

ON)

(Use

the

disc.)

TEST

MODE

4in

TEST

MODE

3

press

once

Tracking

servo

ON

the

PLAY

button.

(4th) (Use

the

disc.)

TEST

MODE

5In

TEST

MODE

4

press

once

the

PLAY

button.

(5th) Track

No.

and

time

are

indicated.

(Use

the

disc,)

T

t

!

t

Display

)

Da

lE51

j

;

L--------..--1

I

r;l’i,,,;’

After

TEST

MODE

5

the

PLAY

button

is

inoperative. Even when

it

is

pressed

(6th

time), key entry

IS

not accepted.

Unless

the

CD

lid

switch

SW303

is

turned

on,

the

test

mode

is

not

set,

Button

Operation

in

Test

Mode

1.

When

the

STOP

button

is

pressed,

all operations

stop.

At

this

time

the

optical

pickup

does

not

slide,

and

TEST

MODE

0

is

displayed.

2.

While

the

SKIP

button

is

pressed,

the

optical

head

moves

from

inside

to

outside or

from

the

outside

to

the

inside.

l

Operation

is

possible

both

during

playing

and

stopping.

l

While

this operation

is

executed,

the

TEST

MODE

indication

does

not

change.

After the optical

pickup

is

slided

from

the

outside

to

the

inside

and

the

optical

pickup

switch

is

turned

on,

the

slide

stops.

(At

the same time

TEST

MODE

0

is

set.)

3.

IF

the

SKIP

button

is

pressed

in

TEST

MODE

4

or

5,

TEST

MODE

3

is

set.

4.

If

the

PAUSE

button

is

pressed

in

TEST

MODE

0,

the

direct play

is

set.

Namely,

TEST

MODE

5

is

set.

Notes

1

.Any

buttons

other

than

those specified above are invalid.

2.Before operation

be

sure

to

connect

all

the

connectors.

-2o-

Servo

Unit

Since the adjusting procedure differs from that described in “ADJUSTMENT PROCEDURES OF AUDIO PRODUCTS”, refer to

the Service Manual.

All the semivariable resistors must be set in the mechanical center position

r

Test Stage

_lAdjusling

Parts

Value/Adjusting Method Instrument

Connecl~on

Set TEST MODE

0.

and

move

the

oickuo

to the center

__.-..--’

Set Test MODE

1

(make sure that the laser lamp

Ilghts)

-

__

Atier

loadmg

a disc, set to TEST MODE 2. (Check to see that focus

servo

is ON.: The disc does not rotate, and a whining sound is

heard.)

4

I-

Set TEST MODE 3 (Spin

servo

is turned on. and the disc rotates)

___-

.~-

Tracking

error

balance

adj

NVRI

T

Ii

‘1 (See Fig. 21-l)

I_.~___

Pin 6 (i/ZVcc) and

4 (TGI)

of TP751

Set TEST MODE 4

(Tracklna

servo

IS

turned

on.)

.A/

Check

agaln

the HF signal waveform.

circuit is used.)

Set TEST MODE 5, and make

sure

that track No. and time are displayed.

-

Stick black tape on the disc, and play that section (Fig. 22-l). (Any mode other than the test mode is acceptable.)

_I_

Focus offset

adj,

VR700

'4 (Fig. 22-Z) Pin 6 (ll2Vcc) and

Din

1

(FGII

Tracking offset adj.

I

of TP751 ‘5

VR710

'6 Pin 6

(1/2Vcc)

and pin 4 (TGI)

nf

TP,K,

*‘7

Figure 22-1

I

“I

II

I-.

1

Adjust to obtain vertically symmetrical waveform (Fig. 21-I) with respect to reference DC level. The reference level is

l/ZVcc

[Amplitude of 0.5 to 1.5 Vpp)

”2 Input oscillation frequency: 1.3 kHz, 100 mV rms

*

3 Input oscillation frequency: 1.5 kHz, 300 mV rms

*

4 Watch the monitor. Adjust so that the error waveform is uniform and minimum (Fig. 22-2) and the audio output is played

properly without noise (track jump noise) and free from skips and pauses.

*

5 The appropriate measuring range of the oscilloscope is 50mV and 0.5mS.

Connect the trigger to pin 14 (HFOK) of CNP700.

Trigger the coupling at DC and (-) slope. Observe the waveform in the normal trigger mode.

*

6 Watch the monitor. Adjust so that the error waveform is uniform and minlmum (Fig. 22-2) and the audio output is played

properly without noise (track jump noise).

*

7 The appropriate measuring range of the oscilloscope is

O.lV

and 0.5mS. The trigger is the same as *5.

(Reference) When the noise element of the error waveform is large and unclear, observe the waveform through the low-pass

filter (Fig. 22-3).

Figure 22-2

PICKUP

kD

SERVO

PWB-Bj

Figure 22-3

I

TP75 1

FOCUS TRACK IN FOCUS TRACK IN

OFFSETOFFSETGAINGAIN

Figure 21-l

Figure 21-2

-2%

Figure 22-4 ADJUSTMENT POINTS

TROUBLESHOOTING

(CD

SECTION)

The

laser

does

not

go

pn,,

I

When

the

CD

does

not

function

..__

___---___.

-__

pa

disc, turn on the power, set the FUNCTION switch to CD, and check the

voltage

of

CNPBBf.~/

The laser does not go on”.

Check the item of “The spin motor’s CLV

servo

is defective”.

Is the output of pin 3 (HF)

,;

TP751

flat I”

test

mode

4?

When the pickup

moves

to a track

using the UP/DOWN button in test

mode 5, is there audio output?

Is the pickup returned to the inner

The pickup

in

swatch

is defective (ON)

Is the pickup in switch set to

OFF?

OFF ON

Check the The pickup in

peripheral circuits switch is defective.

of the control

microcomputer.

Check the item of “Track searching is impossible”.

Does the

disc

play back several ten

seconds even after starling playback?

Check the item of “The slide servo does not function”.

No

not

functla

Check the PWB

p&rns

from pin

1

of

CNP881

to

CNP852.

T

- PWB patterns from pin

1

of CNP8.31 to pin

24(Vcc)

of

IC750.1

.___

If 0340

iS

not short-circuited,

IC750

1s

defective.

Check

the

PWB pattern from

IC750.

~___

IC750

is defective.

~~---____

-23-

----.

k the LCD

PWB of CD. (Check the LD ON terminal of

9 of IC97f.)

~-_

Check the

+5

V line of pin

1

of

CNPBBI.

I

S

there

+5

V at the a890 collector?

NO

Check between pin 17 of

CNP851B

and

Q890

base. If OK, 0890 is defective.

1

Yes

___~

Is there

+5

V at pin 5 of

CNP700?

k

The PWB pattern between 0890 and pin 5 of

CNP700

is damaged.

-1

/Yes

---

-~-

--

1

Check the CNP700 and Flexible PWB. If they are normal. the pickup is defective.

-A

mcus.

”

When the disc is

removed, is the

Check the item of

7he

saw-tooth wave for focus servo does

pickup

mowng

up and down?

-

Is the focus gain

adfusting

VR751

sst

to the minimum position?

Y??S

Readjust the focus gain.

1

No

waveform input to pin

40(FE

OUT) of

IC750? Yes

IC750

is defective.

Is the waveform shown at right input

-b/%Gis

at pin

7(HFOKI

of

IC750? defective.

-

1

Yes

IC750

is defective.

1

(FpE’%T)

-

Y8S

Is a

saw-toofh

wave generating at pin

LOUT)

of

lC7;

Does the saw-tooth

wave

look like the

)N”Llowing

wavefortn?

Check the R779 and 6767 (pins 23

~~~~~ctiue,

and 22 of

IC750).

If OK,

IC750

is

Yes

Yes.

(The

saw-tooth wave

oscillates

to the positive side once.)

/

:

Check the peripheral circuits of pin

35(FSR

IN) of

IC750.

If OK,

lC750

is defective.

I

S

the

saw-tooth wave being input to

8 of

IC700

(same waveform as

Is the saw-tooth wave generating

between

pins

3 and 6 of

IC700

(same Check the peripheral parts of

IC700

and the power line. If OK,

IC700

IS

defective.

Is the saw-tooth

wave

generating

between pins 2 and 3 of CNP700

(same waveform as shown above)?

The

CNPPOO

and flexible PWB are connected improperly or

the

pickup

isdetectiy,j

~-~_____

FpwB

pattern

i

dN:aged

/

”

-24-

between

pins

11

and

14

of

IC720

for

approximately 0.3

-

1.5

seconds?

Faulty

spin

motor

or

disconnection

0.3

-

1.5sec

No

When

test mode

2

is

switched to test

mode

3,

is

5(PWM2)

of

IC780

at

No

+

The

1C780

or microcomputer section

is

defective.

a

high

level for

0.3

-

1.5

seconds and

then does

a

pulse generate?

0.3

-

1.5sec

.

Is

an

eye pattern

being

output

to

3(HF)

of test point

TP751?

(Even

an

No

+

Check

if

the objective

lens

of

the pickup

is

dirty.

If

so,

clean

it.

unclear waveform

is

allowable.) Check the connection between

11

of

CNP700 and

15(HF)

of

IC780.

If

OK,

the

NlCl

or

pickup

is

defective.

Yes.

(Waveform

of

approximately Vp-p

1.5

V)

Is

the eye pattern of

Vp-p

1.5

V

being

output to

15(HF)

of

IC780?

1

Yes

Check the

PWB

pattern

and

C780.

IC780

is

defective.

I

HF

error

(tracking error

signal)

‘norr-nal

in

test

mode

3?

Is

the output

of

4(TGl)

of

TP751 No

Check the

CNP700,

flexible

PWB

and

NICl.

If

OK,

the

pickup

is

defective.

Normal

I-

Is

the tracking

gain

adjusting

VR750

set

to

the

minimum

position?

Check the connection between

9

of

CNP700

and

3(TEIN)

of

IC750

(or

4(TGl)

of

TP751)

and the

F

Readjust the tracking

gain.

Yes

1

F

Check

the

peripheral

parts

of

IC750.

If

OK,

IC750

is

defective.

No

Is

there any output between

pins

11

and

14

of

IC700?

Check the peripheral parts

of

IC700.

If

OK,

IC700

is

defective.

Check,the connection between the

IC700

and flexible

PWB.

If

OK,

the

pickup

is

defective.

There

is

no

audio

output.

There

is

no

audio output

from

both

L

and

R

channels.

LN~

Check

the

Q813

and

Q814

(for

muting). Check the connection between the pins

1

and

20

of

IC810

and the

CNP881.

1

Yes

I

S

the supply voltage

of

IC810

normal?

1

Yes

No

l

Check the power

line

and

IC814.

Are

the supply voltages of

lC811

and

IC813

normal?

No

.

Check

the

power

line

and the power

circuit

of the main

unit.

Yes

No

+

Check the connection

between the

IC780

and

IC781.

If

OK,

IC780

or

IC781

is

defective.

-25-

Does

the slide motor

run

in

t

UP/DOWN

button?

1

Yes

k

the

item

of

“The

slide motor does

not

run”.

During

normal playback track searching,

is

the

___r

Check the connection

of

C750,

etc.

following waveform

being

input

to

4(TClN) of

No

IC750? Yes

/Gm

IC750

is

defective.

*

Track jump:

When

the following waveform

is

being output to

22 of

Yes

Pinioned

lC750 during track searching.

Kick

Pulse

-P

.

Check the flexible

PWB,

NlCl

and

pickup.

CNP700

during track jump?

No

1

Yes

Is

the following waveform

being

output

to

28(TSOUT)

of

IC750

during track searching?

Yes

l

IC750

is

defective.

No

Pin28

m

After

generating

a

kick

pulse,

(TSOUT)

H

does

a

waveform

appear

like

this?

WY

Check the

IC8.51

and the

LCD

PWB

of

CD.

The

slide motor daes

not

run.

When

the

UP/DOWN

button

is

pressed

in

the test

mode,

is

the slide feed signal

being

output between

25(SS

OUT)

of

IC750

and

15

of

IC720

(l/2

Vcc)?

~

No

Check the peripheral parts

of

IC750.

If

OK,

IC750

is

defective.

I

S

the slide feed signal being output between

pins

3

and

6

of

IC720?

Check the connection between

8

of

IC720

and

25(SS

OUT)

of

No IC750.

If

OK,

IC720

is

defective.

Is

the slide feed voltage being supplied to the both

ends

of

the slide motor?

1

Yes

No

Check the

CNP720

and flexible

PWB,

and

then connection

of

PWB

pattern.

Check the slide

motor.

Supply 2.0

VDC

to the slide motor terminal, and

if

the

slide

motor does

not

function,

it

is

defective.

The

slide servo

does

not function.

I

Is

the slide control voltage waveform shown at

right

being input

to

27(SS(+))

of

IC750

during playback?

1

Yes

No

Check the

parts

between

pins

27(SS(+))

and

28(TSOUT)

of

IC750

and

then the connection of

PWB

pattern.

Is

the waveform shown at

right

being output to

25(SS

OUT)

of

IC750?

1

Yes

-

IC750

is

defective.

No

The

slide servo system

is

not

defective. Check again from the beginning.

Rotation

cycle

of

sptn

motor

J

Voltage

differs

according

to

disc

eccentricity

-26-

Sharp CD-JX20X(GY) User manual

Popular MP3 Player manuals by other brands