Service Manual

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CD PortableFM Stereo /AM RadioCassette Recorder

—.. .s“ n; “1I I

MCD-ZI 6F (AU)

(NZ)

1-... .

Specifications

( CASSETTE SECTION )

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

Erasing system . . . . . . Magnet erase

Tape speed . . . . . . . . . 4.75 cm 1 sec.

Fast forward and

rewind time . . . . . . . . . 110 sec. (C-60 tape)

Frequency response . . 80- 12,000 Hz (Normal tape)

(CD SECTION )

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

S/ N ratio . . . . . . . . . . . 70dB

Wow & Flutter . . . . . . . undetectable

Sampling frequency . . . 44.1 kHz

Quantization . . . . . . . . . 16 bits linear/ ch

Pick-up light source . . . Semi-conductor laser

Pick-up wave length . . . 79o nm

Specifications subject to change without notice.. ....

,-.:.,, ...,.,,.

.

( RADIO SECTION )

Tuning ranges . . . . . . . FM :88-108 MHz

AM :525-1,710 kHz

Antennas . . . . . . . . . . . Built-in ferrite bar and

telescopic rod antennas

( GENERAL)

Output power . . . . . . . . 4.0 W x 2 (DC max.)

Speaker . . . . . . . . . . . . 12cmx2,40hms

Terminal impedance . . PHONES :32 ohms

POWW source . . . . . . . . AC :230-240 V, 50 HZ

Dc: 12V

( 8 x “D “ size batteries)

Dimensions . . . . . . . . . 558( W)x170(H)x215(D)m~

Weight . . . . . . . . . . . . . Approx. 3.4 kg including batteries

REFERENCE No. SM580208

LASER BEAM SAFETY PRECAUTIONS

. Pick-up that emits a laser beam is used in this CD player.~ J -:’”’

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 ........... i’90 nm

, ...... ----

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., ..,... . . ,-

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.

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

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

a. CABINET

(1) Remove the battery lid.

(2) Remove the 7 rear cabinet

mounting screws. ( } )

b. TOP PANEL

(1) Remove the 4 top panel

mounting screws.

(2) Remove the top panel.

(3) Remove the chuck pulley.

.......

....,.

“J@

-1-

1 PUSH@-

il.

.. ,..,-

REMOVAL AND INSTALLATION

c. “O” POINT ADJUSTMENT d. ROD ANTENNA TERMINAL

-o- POINT

*2 Sj$yEl

.* ?

TERMINAL

TERM NAL

..-,...-

TAPE DECK ADJUSTMENTS

a. HEAD REPLACEMENT

● After replacement, demagnetize the heads by

using a degausser.● Bq sure to clean the heads before attempting

to make any adjustments.

● All wiring should be returned to the original position

after work is completed. . ...,

,, .... . .-.’”:,,.

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b. MOTOR SPEED ADJUSTMENT ‘., ,

(1) Insert the test tape ( MTT-I 11 N, etc., 3000 Hz ) into

(2)

(3)

..

—tape deck.

Press tape deck PLAY button.

Adjust SVR so that the frequency counter shows are

reading of 3,000 Hz.

c. CHECKING THE MECHANISM TORQUES AND TENSION. Clean the head, capstan and pinch roller before making any measurement.

I Measurement I Take-up torque I Back tension I Tape tension I

Cassette for PLAY:TW-2111A Drive-power cassettePLAY:TW-21 11A

measurement F.FWD/REW:TW-2231 TW-2412

PLAY 30-60 gr.cm 2.0- 4.5 gr.cm 60 gr or more

F.FWD 55-120 gr.cm

REW 55- 120gr.cm

-2-

.

CD PLAYER ADJUSTMENTS

a. DISASSEMBLY OF THE CD PLAYER MECHANISM

(a) Replacement of the spindle motor● First, prepare the new turntable ( Ml -2 ) and new special

washer ( Ml -4 ) for replacement.

The removed turntable will be deformed by the heat of the

soldering iron, and cannot be reused.

● Prepare dial type calipers.

(1)

(2)

(3)

(4)

(5)

(6)

,(7)

(b)(1)

(2)

The attached bonding material can be dissolved by using a

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

turntable ( Ml-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 turnlable.

Remove the two screws ( Ml-3 ) and remove the spindle

motor ( Ml-5 ).

Attach the special washer ( Ml-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.

Install the turntable as shown in the figure.

Secure the turntable by pressing gently.

Be sure to wipe away ( by using a piece of cloth, or similar

material ) any b,onding material coming out of the hole.

Replacement and lubrication of the pick-upBefore replacement of the pick-up, be sure to carefully read

the section regarding the pick-up when the unit is moved or

transported.

Remove the two pick-up rail ( Ml 2 ) with care fixing the two

(3)

latch with any way driver from

( Ml-1 ).

If the pick-up is reconditioned

bottom of chassis

or replaced, be sure to wipe

MI-2+r I -. d

8-

Don’t ●ttached bondtng materialat the too of shaft

I J {CHASSIS)u I

Be sure to wipe away thebonding matearial

CHUCK PULLEY

\ . . /

w-——- 17.15mm—

*0.lmm—

\

—=

- ‘x”FMl-2

the rails clean and also apply a coating of FLOIL ( G-474B ) to

u

~M12.,, ,,,P .- . .,‘ (SHAFT)! ‘-’ 1

their entire circumference and entire length. M1-5(SPINDLEAfter replacement, install the shaft as before. MOTOR SHAFT)

The pick-up P.C. Board pattern is “shorted”, as shown in the “m

(4)

(5)

figure , so that the new pick-up will not be susceptible to the

effects of static.

(6) Set the pattern to “OfX?n” after the pick-up has been

replaced.

SHORT

M6

Ml’ 1“ m

.-.

......

“.

CD PLAYER ADJUSTMENTS

b. PREPARATIONS WA”

(a) Measuring instruments, tools and filter(I j(2)

(3)

(4)

Test disc. : YEDS 18 ( SONY ) or etc.

Oscilloscope : SS5711

(1O MHz or dual-phenomenon )

or Memory scope : DSS6521 (Storagescope)

DC digital voltmeter (Input impedance

1M ohm or more )

AC voltmeter (- 80 dB, input impedance

(5) AF oscillator (400 Hz, 300 mV RMS )

(6) Frequency counter (5 MHz ; or more )

and probe (10 : 1)

(7) Screwdrivers ( non-metallic ) for adjustments(8) Low Pass Filter ( L.P.F. )

(9) DC Power supply :12 V, 1 A

1 M ohm or more)

(b) Component locations diagram● Work can be simplified by removing

the printed circuit boards from the CD mechan

and placing then as shown in the illustration.

. Place the CD mechanism on a flat and level su

to operate it.

POWER SWITCH

‘~CN951-

. . -.

.

c. PARTS LOCATIONQ~+

.-.. P f.d

I

IICN403

PCN404

L

TP4-M ‘“ :__..

GND

TP2

❑Vc

TP5

2’ ‘;RF

TP 1

@lz#

SVR302

(—

CN301

..

-5-

.. “E

.~....,.

CD PLAYER ADJUSTMENTS

Adjustment MeasuringShort-

Input

Itemcircuit

instrument connectionlocation

‘(a) PLLVCOFrequency counter

free-runSHORT 1 —

Oscilloscope(b) Tracking

L.P.F. SHORT 1 —balance

(c) Checking

the “eye” Oscilloscope — —

pattern

d. ADJUSTMENTS

( a ) PLL VCO free-run adjustment(1) Test disc removed from the unit.

(2), Short-circuit points 1 on the printed-circuit board.

(3)

(4)

(5)

(6)

(b

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

‘ Connect a frequency counter to TP 5 ( PLL ) and

TP 4 ( GND ).

Switch ON the DC power ( 12.0 V ) ,’ ‘,.,..--: - “

(See component locations diagram at page 5)

Check the reading of the frequency counter

is 4.300 MHz -5.000 MHZ. -,-,

Cancel the short-circuiting of sho~t-circuitpoint 1

on the printed-circuit board. ‘“’., ..,--

) Tracking balance adjustment

Short-circuit points 1 on the printed-circuit board .. ..- .:-,

Connect an oscilloscope to TP 1 (TE) and TP 2 (VC 2.5V).

Switch ON the DC power. .“

Set the test disc.

PLAY switch push ON.

Cancel the short-circuiting of short-circuit point 1

on the printed-circuit board.

Adjust SVR302 so that the oscilloscope’s waveform is

symmetrical, as shown in the illustration.

Switch OFF the DC power.

( c ) Checking the eye pattern. The adjustments (a) - (b) complete the adjustments of

the CD player.

Next, check the eye pattern waveform.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Switch ON the DC power.

Connect an oscilloscope to TP 3 ( RF) and

TP 2 (VC 2.5V ).

Load !he test disc.

PLAY switch push ON.

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

of waveform and that the diamond shape is clearly defined.

Press the STOP button.

Switch OFF the DC power.

..

-6-

OutputAdjust-

ment Adjustment valueconnection

location

TP 5 (PLL) — 4.300 MHz -5.000 MHzTP 4 (GND)

TP1:TESVR302

Waveform symmetry

TP 2: VC2.5V A=B 1.5 Vp-p

Check be sure that the

TP3:f?F“eye” pattern is at the

TP 2: VC2.5V —center of the waveform

and that the diamond

shaoe is clearlv defined

,.

,,. ,...

!-

. !“-, . L.P. F. “-

-1 1-

FREQUENCY

COUNTER

OSCILLOSCOPE

Ow 1.5vp-p

I vlolv A-B

OSCILLOSCOPE

c

NM f XPANCKD

/m. . . .

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 12.0 V

Phones impedance : 32 ohm

Standard output : 0.5 mW (126 mV)

Function switch : RADIO

TONE controls : HIGH

PARTS LOCATION

. -.

.. ..- . .

. ...

.-3 / .::, !,.,, --- .. :,.-.. ~,, :,.,,,.. . . .. . .. .

----&& ~

I ‘:-’@tiq-3 LOOS

@VCT-4

‘CL

IuEl ! .“LO02 LO06

T103

.O%

HF(c“--

-ITP2 . . .T104

m -: .;5FI ksizol(’) ‘- ‘}’,.-,* ,,, ; ,“ .:-:,

aR202”,”Vco~7 :‘,

-7-

,.,.. . .

...’...

..”.

.:

-

VTVM

Oscilloscope

a. AM ADJUSTMENT :. BAND SELECT SWITCH : AM

Adjusting ConnectionsStep

CircuitSG Frequency Position of tuning dial Adjustment

Input output

Closed the outputConnect sweep

terminal by sweep

1 IFgenerator to

::yo;:r’ ‘t “ace C109(H) & R202(G)455 kHz Low T104

2 Tuning Connect AM SG Connect VTVM to 517kHz Low end LO06

3coverage to Test Loop speaker terminals

1750 kHz High end VCT -4

4Tracking

Connect AM SG Connect VTVM to 600 kHz 600 kHz LOOS

5to Test Loop speaker terminals

1400 kHz 1400 kHz VCT -3

e Repeat adjustments

--l-fF-

-+

Max.

Max. I

iii

.. .. -

TUNER ADJUSTMENTS

b.FM ADJUST!

AdjustingStep

Circuit

1 IF

2Tuning

3 coverage

4Tracking

IENT BAND SELECT SWITCH : FM FM Dummy antenna : 75 ohm

Connections

ISG Frequency Position of tuning dial Adjustment

[CDUt Outvut

Connect sweep I Connect sweep \ Igenerator to Igenerator to I 10.7 MHzICOO1O (H) RO04 (H) I Low

I

I T103

& TP 2 (G) & R202 (G) I I

I I

Connect FM SG Connect VTVM to 87.0 MHz Low end LO02

to TP1 (H) & TP2 (G) speaker terminals109.0 MHz High end VCT-2

I I

Connect FM SG Connect VTVM to 98.0 MHz 98 MHz VCT-1

to TP1 (H) & TP2 (G) speaker terminals

unbalanced

- ‘ VTVM

Oscilloscope

Max.

Max. 1

[ 5 I Repeat adjustments

-,.c. FM VCO ADJUSTMENT BAND SELECT SWITCH : FM

(1) Input signal : 60 dB 22.5kHz Non-modulation. at 98.0 MHz

1 Connection : Hot to TP-1, Ground to TP-2

Pilot signal : OFF

(2) Adjustment : VR201 . . . . . , .- ,---FREQUENCY :76.00 kHz t~O.15’kHz

.. .-

. FREQUENCY COUNTER Sensibility: HIGH LEVEL ( mOre than’20 MV p-p ) ‘- .,

. Adjust VR201 so that the frequency counter shows are reading of 76.00 kHz ~ 0.1.5 kHz. ,-. . .. ... . . . .- . .,, ..

+z RANGE: 10mV

Cu : 270K+

%v

I!h

m [Vco) ACo0s

VOLTMETER

lx

INPUT OUTPUT

(MODEL ;VT165. rVT1061

. .....’. .,

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