Sanyo MCD-Z150F Bedienungsanleitung

FILE NO.

Service Manual

Portable CD/Stereo Radio

MCD-Z150F

(XE)

Cassette Recorder

Specifications

(Cassette Section)

Recording system........................AC bias, 4 track stereo

Erasing

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

Magnet

erase

Tape

speed

..................................4.6 cm

sec.

Fast forward and rewind time..

....

.I10

sec. (C-60 tape)

Frequency response....................60

14,000

Hz (Normal tape)

(CD Section)

Channels..................................... .2channels

Wow

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

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

Undetectable

Samplingfrequency....................

.44.1

kHz

Quantization.................................166

bitslinear

Pick

lightsource

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

Semi-conductor

laser

Pick up wave length....................

.790

Leaser output...............................

Continuous

wave

max.

0.6mW

PRODUCT CODE No.

142 660 04

(Radio Section)

Tuning ranges . . . . . . . . . . . . . FM : 67.5

106 MHz

526.5

1,606.5

kHz

Antennas

. . . . . . . . . . . . . . . . . . . . . Built-in

ferrite

bar and

telescoping rod antennas

(General)

Power output

_..............

2.8W

ch (DIN music)

Speaker . . . . . . . . . . . . . . . . . . . . . . . 10 cm x 2,

ohms

Terminal impedance

PHONES

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

ohms

Power source . . . . . . . . . . . . . . AC

230 V, 50 Hz

12 V,

“R14/C” batteries (not supplied)

Dimensions

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

412x158x239mm(WxHxD)

Weight (approx.) . . . . . . . . . . 2.6 kg (without batteries)

Specifications subject to change without notice.

REFERENCE No. SM580806

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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

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

ATELSE

FOR

STRALING.

VARNING

OSYNLIG LASER

STRALNING

NAR

DENNA DEL

OPPNAD

OCH

SPP;RR

URKOPPLAD.

STRALEN

iiR FARLIG.

VORSICHT

UNSICHTBARE LASERSTRAHLUNG TRITT

AUS,

WENN A

DECKEL GEOFFNET UND WENN SICHERHEITSVERRIEGELUNG

UBERBRUCKT

IST.

NIGHT.

DEM

STRAHL

AuSSETZEN.

VARO

AVAllAESSA JA

SUOJALUKITUS

OHITElTAESSA OLET ALlTlINA

NAKYMATTOMALLE

LASERSATEILYLLE.

iiLii KATSO SiiTEESEEN.

REMOVAL AND INSTALLATION

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

l 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

PUSH

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REMOVAL AND INSTALLATION

d. CD MECHANISM e. CD P.W.BOARD

f. OPEN/CLOSE P.W.BOARD g. DISPLAY P.W.BOARD

EN/CLOSE

P.W.B

h. MAIN P.W.BOARD BLOCK

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REMOVAL AND INSTALLATION

i. TUNER P.W.BOARD

k. WIRING

“0”

POINT ADJUSTMENT

SET P6INTER START

TAPE MECHANISM

/ii\

‘C-MECHA (HEAD)

SPEAKER

C-MECHA

MOTOR

‘CN412

CN422

CN416 R/P SWITCH P.W.B.

CN417

-3-

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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

First, prepare the new turntable (CM1 -2) and new special washer

(2)

(3)

(4)

(5)

(6)

(1)

(2)

(3)

(4)

(5)

(6)

(CMI-4)

for replacement.

The removed turntable will be deformed by the heat of the

soldering iron, and cannot be reused.

Prepare dial type calipers.

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.

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.

Remove the two screws (CM1 -3) and remove the spindle motor

(CMl-5).

Attach the special washer

(CMI-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.

Don’ t attached

bonding

material

at the top

Shalt.

Bondlng

material

SHAFT

Be sure to

wipe

away

the

bonding

material.

Ct?JCK

PULLY

TURN TABLE

SPINDLE MOTOR

Confirm of inclination for the turntable

Connect the digital voltmeter as shown in the figure.

Set the test disc

(YEDS18),

press the PLAY button (Playback

for the most inner music).

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

voltmeter.

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

for the most outer music).

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

voltmeter.

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

confirm at

300mV less than for recorded voltage of the most

outer music.

Unit

F+

Digital

Voltmeter

Low Pass Filter

-4-

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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)

(2)

(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.

(short) (open)

Checking the action of the CD mechanism

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.

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.

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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.

(1)

(2)

(3)

(4)

Confirm of general operation

Set the test disc.

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

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

Press the STOP button.

Connect an oscilloscope to

RF(=IClOl

pin41(H)) and VR RF

O----_-I--I

c. Confirm of eye pattern

(1)

(J1315).

(2)

Set the test disc, press the PLAY button.

(3)

(4)

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

and that the diamond shape is clearly defined.

Press the STOP button.

OSCILLOSCOPE

I I

Ill1

OPENING EXPANDED

-6-

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TUNER ADJUSTMENTS

l Use a plastic screw driver for adjustments.

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

Supply voltage

12.OV

Phones impedance

32 ohms

Standard output

50mW

Function switch

RADIO

a. Parts Location

XF201

L2>

,TP202

VCT-3

VCT-1

VCT-2

VCT-4

L2102

L2104

Xj213

XF211

b. AM Adjustment

BAND SELECT SWITCH

VTVM

Oscilloscope

Step Adjusting

Circuit

Connections

SG Frequency

Input

output

Position of

tuning dial Adjustment

Closed the output Connect sweep

terminal by sweep generator to

generator, it place

C2106

(H)

455

kHz

L2103. J2107

(E)

Tuning coverage

Connect AM SG to Connect VTVM to

test loop

speaker terminals

I+

Max.

Connect AM SG to Connect VTVM to 600

kHz

test loop speaker terminals 1400

kHz

Tracking

1400

kHz

VCT-3

c. FM Adjustment

BAND SELECT SWITCH

FM Dummy Antenna

75 ohm unbalance

Adjusting

Circuit

Connections

SG Frequency

Input

output

Connect sweep Connect sweep

generator to

IC201

lpin (H)

generator to

C2106

(H)

10.7 MHz

TP202 (E)

J2107

(E)

Position of

tuning dial

Adjustment

VTVM

Oscilloscope

Step

Tuning coverage

‘Onnect

TP201 (H)

Connect VTVM to 96 MHz

TP202 (E) speaker terminals

-7-

Tracking

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TAPE ADJUSTMENTS

a. Adjusting Azimuth

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

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

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

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

(1)

(2)

(3)

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

kHz)

in tape deck.

Press the PLAY button.

(4)

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.

HEAD

AZIMU

Replacing the Head

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

degausser.

RIP

I-ltAD

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

completed.

c. Replacing the Motor d. Adjusting Tape Speed

l Use a plastic screwdriver for adjustment.

(1)

Inset the test tape (MTT-I 11 N etc., 3000 Hz).

(2) Press the PLAY button.

(3)

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

counter becomes 3000 Hz.

e. Checking the Mechanism Torques

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

Measurement

Cassette for

measurement

PLAY

Take-up torque

Back tension

PLAY

l-W-21 11 A

F.FWD

REW

TW-2231

30-60

gr.cm

PLAY

T-W-21

1.5-4.5 gr.cm

55-120 gr.cm

55-120 ar.cm

___

Tape tension

Drive-power cassette

l-W-241 2

60 gr or

-8-

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D MECHANISM

___.___

___.__

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