Sanyo MCD-Z250F User manual

I

FILE NO.

Service Manual

CD Radio Cassette

Recorder

MCD-Z250F

(XE)

Specifications

(Cassette Section)

Recording

system........................

ACbias,

4

track stereo

Erasing

system.............................

Magnet

erase

Tape

speed

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

.4.8 cm

I

sec.

Fast forward and rewind time..

....

.l

10

sec. (C-60 tape)

Frequency response

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

.60 -

14,000

Hz

(Normal tape)

(CD

Section)

Channels......................................

2

channels

Wow

&

Flutter...............................

Undetectable

Sampling frequency.....................

44.1

kHz

Quantization................................

.16

bitslinear

/

ch

Pick up light source......................

Semi-conductor laser

Pick up wave

length

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

.790

nm

(Radio Section)

Tuning ranges..............................

FM

:

87.5 - 108 MHz

AM:522-1,611

kHz

Antennas......................................

Built-in

ferritebar

and

telescoping rod antennas

PRODUCT CODE No.

142 660 10

(General)

Output power

. . . . . . . . . . . . . . 2.8 W/ch

(DINmusic)

Speaker . . . . . . . . . . . . . . . . . . . . . . . 10 cm

x 2,8 ohms

Terminal impedance

PHONES

. . . . . . . . . . . . . . . . . 32

ohms

Power source

. . . . . . . . . . . . . . AC

:

230 V, 50

Hz

DC

:

12 V (8 “R14/C” batteries)

Tuner memory back-up batteries

:

DC 6 V, 4

“RGIAA”

batteries

Remote control unit

:

DC 3 V, 2

“RGIAA”

batteries

Dimensions

. . . . . . . . . . . . . . . . . 412 x 158 x 239 mm (W x H x

D)

Weight

(approx.) . . . . . . . . . .

2.8 kg (without batteries)

Specifications subject to change without notice.

REFERENCE No. SM580826

LASER

BEAM SAFETY PRECAUTIONS

l Pick-up that emits a laser beam is used in this CD player.

CAUTION

:

USE OF CONTROLS OR ADJUSTMENTS

OR PERFORMANCE OF PROCEDURES

OTHER THAN THOSE SPECIFIED HEREIN

MAY RESULT IN HAZARDOUS RADIATION

EXPOSURE

LASER

OUTPUT . . . . . . . . . . 0.6

mW

Max.

(CW)

WAVELENGTH

. . . . . . . . . . . . . 790

nm

CAUTION -INVISIBLE LASER RADIATION WHEN OPEN AND

INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL

-

USYNLIG

LASER

STRALING

VED

ABNING,

NAR

SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGA UDS /ElTELSE

_

FOR

STtiLING.

VARNING

-

OSYNLIG

LASER

STRALNING

N&R

DENNA DEL AR OPPNAD

OCH SPiiRR

AR

URKOPPLAD.

STRALEN

iiR FARLIG.

VORSICHT

-

UNSICHTBARE IASERSTRAHLUNG TRITT AUS, WENN

m

1

DECKEL

GECjFFNET

UND WENN SICHERHEITSVERRIEGELUNG

I

~~BEREIROCKT

1s~.

NIGHT,

DEM

STRAHL

AUSSETZEN.

VARO

-

AVAllAESSA

JA

SUOJALUKITUS

OHITEllAESSA

OLET

ALllllNA

NkYMjill&.4A;LLE

LASERSATEILYLLE.

Ati

KATSO SjiTEESEEN.

REMOVAL AND INSTALLATION

.

Disconnect the power cord’s plug from the electrical outlet.

.

All wiring should be returned to the original position after work is completed.

l First have ready many the new FIXERS (614 129 4971) for replacement.

l Arrange the lead wires so that they are not near the heat sink.

a. CABINET

b. TOP PANEL

c. CASSETTE LID

REMOVAL AND INSTALLATION

d. CD MECHANISM

e. CD P.W.BOARD

f. OPEN I CLOSE

P.W.BOARD

g. DISPLAY P.W.BOARD

OPEN/CLOSE

P.W.S

h. MAIN P.W.BOARD BLOCK

0

a8

REMOVAL AND INSTALLATION

i. TUNER P.W.BOARD

j.

WIRING

l FRONT

l TAPE MECHANISM

\

SPEAKER

-

C-MECHA &MOTOR

‘C-MECHA

(HEAD)--

-

CN422

-

CN416

\

-CN412

WP SWITCH P.W.B.

-

CN417

-3-

l The removed turntable will be deformed by the heat of the

soldering iron, and cannot be reused.

l Prepare dial type calipers.

(1,

The attached bonding material can be dissolved by using a

60W soldering iron to heat the shaft at the under part of the

turntable

(CMl-2)

for about one minute.

(2)

The turntable can then be removed from the shaft by very

carefully applying force upward at the center of the lower surface

of the turntable.

(3)

Remove the two screws

(CMl-3)

and remove the spindle motor

(CMl-5).

(4)

(6)

Attach the special washer

(CM1-4)

to the spindle motor.

Apply a small amount of a mixture of the “Three Bond 2001

and

2015F”

bonding materials to the motor’s shaft.

Initial the turntable as shown in the figure. Secure the turntable

by pressing gently. Be sure to wipe away (by using a price of

cloth, or similar material) any bonding material coming out of

the hole.

REPLACEMENT OF CD MECHANISM

l Note that the mechanism of the CD player is very delicate.

l

It

is very important that the spindle motor (witch rotates the disc), and the sled motor (which cases the disc signals to be tracked), as

well as the gear and other components, operate smoothly, without eccentricity.

l When handling the pickup, take care not to exert excessive force, and particular care should be taken not to touch the lens or the

drive circuit’s P.W.Board pattern.

a. Replacement of the spindle motor

l

First, prepare the new turntable

(CMl-2)

and new special washer

(CM1-4) for replacement.

Don’ t attached bonding material

at the too of shaft.

Bonding material

8-IOmm

11.0

&

f

O.lmm

CM2

L---L

SHAFl

CM%5

Be

sure to

woe

away

the bonding material.

I

SPINDLE

MO1

SHAFT

b.

Confirm of inclination for the turntable

(1)

Connect the digital voltmeter as shown in the figure.

(2)

Set the test disc

(YEDS18),

press the PLAY button (Playback

for the most inner music).

(3) At this time, record voltage value to indicate at the digital

voltmeter.

(4)

Access the most outer music, press the PLAY button (Playback

for the most outer music).

(5)

Again at this time, record voltage value to indicate at the digital

voltmeter.

FrF*m

(6)

For reference at the recorded voltage of the most inner music,

Low Pass Filter

confirm at

+

300mV less than for recorded voltage of the most

outer music.

REPLACEMENT OF CD MECHANISM

c. Replacement and lubrication of the pickup

l Before replacement of the pickup, be sure to carefully read the

section regarding the pickup when the unit is moved or

transported.

(1)

.

C-3

.

(3)

.

Remove a pickup rail (CM2) with a driver from the bottom of

chassis.

When removing or inserting the pickup rail from or into chassis,

take care not to exert excessive force.

When the pickup is reconditioned of replaced, be sure to wipe

the rails clean and also apply a coating of

FLOIL

(G-4748) to

there entire circumference and entire length.

When applying the grease, do not allow any grease to adhere

to any other parts.

Pass the pickup rail (CM2) through the new pickup (CM7).

The pickup P.W.Board pattern is “shorted”, as shown in the

figure, so that the new pickup will not be susceptible to the

effects of static.

Set the pattern to “open” after the pickup has been replaced.

I

(short)

(open)

I

d.

Checking the action of the CD mechanism

e. Replacement of the sled motor

(1) Disconnect the socket (for the sled motor power supply) from

(1) Remove two screw

(CYl)

and remove the sled motor (CM3).

the P.W.Board.

(2)

Apply a voltage of DC

2.OV

to the sled motor’s terminal.

(3)

Measure the current during sled motor operation.

l

The direction of movement of the pickup (outer groove or inner

groove) can changed by changing the battery polarity.

(4) The current during sled motor action varies according to the

positional relationship of gear (CM5, CM6).

(5)

If the current exceeds

40mA,

remove the gears (CM5, CM6).

(6)

Apply a small amount of a FLOIL (G-4748) bonding materials

to the shaft.

REPLACEMENT OF CD MECHANISM

f. Resetting the pickup to the home position

(1) The limit switch is switched ON by the projection of this rack

gear secured to the returned pickup, after which the sled motor

continues to operate (by the circuit) for approximately 30 msec.

:

There is then again a reverse operation, and movement to

the position at which the switch is switched OFF.

(2)

Rotation continues during about 30 msec, after the switch is

switched OFF. And then the pickup stops at home position.

CONFIRM OF CD SECTION

a. Preparation

l Measuring instruments and Test disc.

(1)

Test Disc

:

YEDS 18 (SONY)

(2)

Oscilloscope

:

SS5711

(10 MHz and Dual Phenomenon)

NOTE : CD section of this unit can not need adjustment, because CD P.W.Board checked at automatic checker.

b. Confirm of general operation

(1) Set the test disc.

(2)

Press the PLAY button, then confirm the disc rotating to clockwise direction.

(3)

Press the SKIP/SEARCH button, then confirm the most inner music or most outer music accessing at speedy.

(4) Press the STOP button.

c. Confirm of eye pattern

(1) Connect an oscilloscope to

RF(=IClOl

pin41 (H)) and VR

(J1315).

(2)

Set the test disc, press the PLAY button.

(3)

Check to be sure that the “eye” pattern is at center of waveform

and that the diamond shape is clearly defined.

(4) Press the STOP button.

ENING

EXPANDED

-6-

TUNER ADJUSTMENTS

.

Use a plastic screw driver for adjustments.

Adjust the intermediate frequency of AM and FM to the frequency of ceramic filter.

Supply voltage

:

DC

12.OV

Phones impedance

:

32 ohms

Function switch

:

RADIO

a. Parts Location

TPf

JP3

TP1,2

:P6

b

.

AM Adjustment

CT201

I2204

ul

e

XF213

TPl

-TP8

-TPlO

Ti'7

Tb9

Till

BAND SELECT SWITCH

:

AM

Step

Adjusting

Tuning

Input Connection

Circuit

Frequency Measurement

input

Output Connection

Adjustment

Measurement Output

Parts

VTVM Oscilloscope

1

(45&Hz)

999

kHz

AM Sweep

VTVM

TP8 (H)

Generator

Loop ANT

Oscilloscope TP7 (E)

XF213

&

(Non-adjustment)

4

Tracking

1~1

::zzrf

1

Loop

ANTI

Os~~ope

I

tL!/i

IslMaximum

c. FM Adjustment

BAND SELECT SWITCH

:

FM

FM Dummy Antenna

:

75 ohm unbalance

Step

Adjusting Tuning

Input Connection

Output Connection

Adjustment

Circuit

Frequency Measurement

Input

Measurement Output

Parts

VTVM Oscilloscope

1

(10.6:MHz)

98.1 MHz

FM Sweep

TP2 (H)

VTVM

TP8 (H) _

Generator

TP3 (E) Oscilloscope TP7

(E)

+

(Non-adjustment)

2

Tuning

87.5 MHz

Digital TP6 (H)

-

Confirm 2.0

+

0.5 V

-

3

Coverage

108.0 MHz

Voltmeter

TP12 (E)

L2002

5.5 -+O.l v

4

90.0 MHz

TPlO(L)

-

Tracking

FM Signal

TPl

(H)

VTVM

TPil(R)

Confirm with being near

5

106.0 MHz

Generator

TP3 (E) Oscilloscope

TPg

(E)

_

by effective sensitivity.

TAPE ADJUSTMENTS

a. Adjusting Azimuth

Be sure to clean the heads before attempting to make any adjustment.

Be sure both channel’s waveform are the same for the phase matching.

Be sure both channels (1 and 2) are the same level using a dual-channel oscilloscope.

After completion of the adjustment, apply the threadlock (TB-1401 B) to the azimuth adjustment screws to fix them securely.

(1)

(2)

(3)

(4)

Load an azimuth adjustment test tape (VT-T-703 etc., 10

kHz)

in tape deck.

Press the PLAY button.

Use a cross-tip screwdriver to turn the screw for azimuth

adjustment so that the left and right outputs are maximized.

Press the STOP button.

b.

Replacing the Head

HEAD

AZIMU

l After replacing the head, demagnetize the head by using a

degausser.

RIP

HEAD

l All wiring should be returned to the original position after work is

completed.

c. Replacing the Motor

0

Pl

d. Adjusting Tape Speed

l Use a plastic screwdriver for adjustment.

(1)

Inset the test tape

(Ml-f-1

11 N etc., 3000 Hz).

(2) Press the PLAY button.

(3)

Use a flat-tip screwdriierto turn the SVR to adjust so that the frequency

counter becomes 3000 Hz.

e. Checking the Mechanism Torques

.

Clean the head, capstan and pinch roller before making any measurement.

Measurement

Cassette for

measurement

PLAY

FSWD

!?EW

Take-up torque

PLAY

:

TW-2111 A

F.FWD

I REW

:

TN2231

30-60

gr.cm

55-l 20 gr.cm

66-120

gr.cm

Back tension

Tape tension

PLAY:TW-2111A

Drive-power cassette

TW-2412

1.5-4.5 gr.cm

60 gr or more

-

_-

-

24

27

TAPE MECHANISM

TM-PR15TN-SH

PARTS LIST

PRODUCT SAFETY NOTICE

EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC

SYMBOL A IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY CAN

BEOF

SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY A, USE ONLY THE REPLACEMENT PARTS DESIGNATED,

OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WAlTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST

IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO DETERMINE THAT EXPOSED

PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE CUSTOMER.

CAUTION :

Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.

Regular type resistors are less than

l/4

W carbon type and 0 ohm chip resistors.

Regular type capacitors are less than 50 V and less than 1000

FF

type of Ceramic type and Electrical type.

PACKING

&

ACCESSORIES

FIXING PARTS

REF.NO.

PART NO.

DESCRIPTION REF.NO.

PART NO.

DESCRIPTION

614 291 9330 CARTON CASE

YOl 411 025 1901 SCR S-TPG PAN

2X3,RIP

614 284 7367

CUSHION,RIGHT

YO2

411 025 2007

SCR S-TPG PAN

2X4,RIP

PWB

614 284 7350

CUSHION,LEFT

YO3

411 001 8801

SCR BIN 3X6,ANTENNA

6450119552

POLY SHEET,1 1

OOX400,SET

COVER

614 231 6832

LABEL,SAFETY

614 291 9521

INSTRUCTION MANUAL

6450194818

REMOCON,RB-Z150

6450057007

BATTERY LID,REMOTE CONTROL

A 6142357859

POWER CORD

or

A 6140231779

POWER CORD

or

A 6450169984

POWER CORD

CABINET

&

CHASSIS

REF.NO.

1

2

3

4

5

6

7

8

9

10

11

12

14

15

15-1

15-2

15-3

15-4

15-5

15-6

16

18

21

22

23

24

25

26

27

28

32

33

34

36

39

42

44

PART NO.

DESCRIPTION

614 284 7886 ASSY,CABINET

6142897508 ASSY,DEC PANEL

614 284 7916

BUTTON,PLAY STOP SKIP

6142891865

ASSY,LID CASSETTE

614 291 8906

ASSY,CABINET REAR

6142868928

LID,BATTERY

6142891964

HANDLE

6142847992

PANEL,TOP

6142891872

ASSY,LID CD

6142847909 BUlTON.MEMORY

REPEAT BAND

6142837351

KNOB,ROTARY,VOLUME

6142850893

KNOB,ROTARY,TONE

6142891889 BlJlTON,CD OPEN

6142891896 BUlTON,MECHA

6142926802

BUTTON,PAUSE

6142926796

BUTTON,STOP/EJECT

6142926789

BUTTON,F.FWD

6142926772

BUlTON,REW

6142926765

BUTTON,PLAY

6142926758

BUlTON,REC

614 284 6988

KNOB,SLIDE,FUNCTION

614 284 6889 BUl-fON,BASS

6142708316

ASSY,GEAR

614 284 7091

SPRING,WIRE,CASSETTE

6142776780

ASSY,PULLEY

6142708316

ASSY,GEAR

6142847084

SPRING,WIRE,CD

OPEN

614284 7015

LEVER,CD

OPEN

6142702178

DAMPER

6142408308

SPRING,COMP

614 284 7039

MOUNTING,PWB

6142571446

MOUNTING,CD,AMP PWB

6142847602

MOUNTING,BOSS,MECHA

614 284 7985

MOUNTING,TUNER

614284 8074

TERMINAL,ANTENNA

614 258 1841 SPRING,PLATE,R/P

6141300382

LUG,LEAD DRESSING

6142895313

CUSHION,CABINET REAR

6142895313

CUSHION,TUNER PWB

YO4

4110208905

YO5

411 021 4005

Y06

4110214005

YO7

411 021 4104

Y08

411 021 4005

YO9

4110214005

Y12

4110214005

Y13

4110214005

Y14

4110209100

Y15

4110214906

Y18

4120326408

Y19

4120326408

Y20

4120326408

Y21

4120326408

ELECTRICAL PARTS

REF.NO.

PART NO.

51

A 4230167809

52

A 6142412435

53

6142896976

54

6450057960

55

6141299082

61

6450221217

62

6450246531

63

6450192265

64

6142874325

65

614 287 4349

66

6142874318

CD P.W.BOARD ASSY

REF.NO.

PART NO.

71

6142896396

CNlOl

6450101472

CN102

6450125508

CN103

6450060908

IClOl

4093788104

IC102

4093962207

IC103

A 4093729602

L1451

645 004 0344

PR102

A 6450137075

a301

4050020308

or

4050055508

t1401

A

4050026706 4050095207

or

A 4050019302

SCR S-TPG BRZ+FLG 3X10,SPEAKER

SCR S-TPG BIN 3X12,MOUNTING,

TUNER

SCR S-TPG BIN 3X12,AC SOCKET

SCR S-TPG BIN 3X12,PANEL,TOP

SCR S-TPG BIN 3XlP,C-MECHA

SCR S-TPG BIN 3X12,MOUNTING,PWB

SCR S-TPG BIN

3X12,AMP

PWB

SCR S-TPG BIN 3X12,

MOUNTING BOSS

SCR S-TPG BRZ+FLG 3X12,TRANS

SCR S-TPG BIN 3X20,CABI-BACK

SPECIAL

SCREW,SPRING

WIRE

SPECIAL

SCREW,DUMPER

SPECIAL

SCREW,CD

MECHA

SPECIAL

SCREW,TERMINAL

DESCRIPTION

FUSE 250V 2A

ANTENNA

SPEAKER

CORD,SOCKET

LUG

FLEXIBLE FLAT CABLE,17P

FLEXIBLE FLAT CABLE,24P

FLEXIBLE FLAT CABLE,13P

CORDPP CONNECTOR,AMP-MECHA

CORD,3P CONNECTOR,

AMP-SPEAKER

CORDPP

CONNECTOR,

AMP-RIP HEAD

DESCRIPTION

ASSY,PWB,CD

SOCKET,FPC

13P,CD

PICK-UP

SOCKET,FPC

17P,AMP&SYSCON

PLUG,2P,OPEN/CLOSE SWITCH

IC LA9240ML

IC

LC78622ED-U

IC LA6541

INDUCTOR,lOU

K

PROTECTOR,0.5A

125V

TR

2SA1037K-R

TR

2SA812-M6

TR

2SA1179-M6

TR 2SB927-S

TR

2SA1020-Y

-

10

-

PARTS LIST

REF.NO.

Q1781

:I881

or

Iwo01

Iwo02

moo3

R1004

R1005

R1006

R1007

R1008

R1021

R1023

R1024

R1025

R1026

R1028

R1029

R1030

R1031

R1032

R1301

R1302

R1303

R1304

R1305

R1308

R1309

R1310

R1311

R1312

R1313

R1314

R1315

R1317

R1318

R1319

R1320

R1321

R1323

R1324

R1325

R1326

R1327

R1328

R1329

R1330

R1331

R1332

R1333

R1334

R1335

R1336

R1341

R1343

R1347

R1348

R1453

R1454

R1455

R1456

R1461

R1462

R1463

R1464

R1465

R1471

PART NO.

DESCRIPTION

405 014 4509 TR

2SC2412K-R

405 011 1006 TR

2SC1623-L6

405 014 4509 TR

2SC2412K-R

405 011 1006 TR

2SC1623-L6

401 037 5004 MT-GLAZE 0.000 ZA

l/low

401 037 5004 MT-GLAZE 0.000 ZA

l/low

401 037 5004 MT-GLAZE 0.000 ZA

l/low

401 037 5004 MT-GLAZE 0.000 ZA

l/low

401 037 5004 MT-GLAZE 0.000 ZA

1llOW

401 037 5004 MT-GLAZE 0.000 ZA

1llOW

401 037 5004 MT-GLAZE 0.000 ZA 111OW