Sanyo MCD-S870F Bedienungsanleitung

IFILE No. I

Service Manual

Specifications

CD Portable Stereo Radio MCD-S870F (AU)

Double Cassette Recorder

wl~ [[l,,,, I[[I I I~piii A

(CASSETTE SECTION)

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

Erasing System .....................Magnet erase

Tape speed ...........................4.75 cm/sec.

Fast forward and

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

Frequency response .............63-14.000 t-iz

(CD SECTION)

Channel .................................2 channel

S/N ratio ..............................73 dB

Wow &Flutter ........................ Undetectable

Sampling frequency ..............44.1 kHz

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

Pickup light source ................Semi-conductor laser

Pickup wave length ...............790 nm

Laser output ..........................Continuous wave max. 0.6 mW

PRODUCT CODE No.

14298302

(RADIO SECTION)

Tuning range .........................AM :525-1,710 kHz

FM:88-108 MHZ

Antenna ................................. FM :Telescopic rod

AM :Built-in ferrite bar

(GENERAL)

Power output .........................4.0 Wx2(DC max.)

Speaker ................................. 12 cm x2, 4ohms

PIEZO X2

Terminal impedance ............. PHONES :32 ohms

Power source ........................AC :230- 240V, 50 Hz

DC :12V (8”D” size batteries)

Dimensions ...........................670x280 x220mm(Wx HxD)

Weight (approx.) ....................7.4 kg (without batteries)

Specifications subject to change without notice,

REFERENCE No. SM580498

LASER BEAM SAFETY PRECAUTIONS

CAUTION :

USE OF CONTROLS OR ADJUSTMENTS OR

PERFORMANCE .OF PROCEDURES OTHER

THAN THOSE SPECIFIEDHEREIN MAY RE-

SULT IN HAZARDOUS RADIATION EXPO-

SURE

LASER OUTPUT ........0.6mW Max. (CW)

WAVELENGTH ...........790nm

●Pick-up that emits alaser beam is used in this CD player.

wv—

REMOVAL AND INSTALLATION

cAuTiON -INVISIBLE LASER RADIATION WHEN OPEN ..0

,.,,!?, “.., DEFEATED AVOID EX=OSURE TO BEAM

T-A

A.D”ARSEL USYNLIG MSER STRALING VEO ABNING, NAM

SIKKERHEDSAFBRY DERE ER UDE AF FUNKTION, UN CGA UDS ETTELSE FOR

vARNING OSYNLIG L4SER STRALNING NAR OENNA DEL AR OPPNAD

OCH SPARR AR URKOPPMD STRALEN AR FARLIG

vORSICHT -UNSICHTBARE LASERSTR AH LUNG TRITT AUS, WENN

DECKEL GEOFFNET uNO WENN SICHERHEITSVERRI EGELUNG

UBENBRUCIO IST NICHT DEM STRAHL AussET2EN

“..0 AVATTP. ESSA JA S“OML”KITUS OH ITETTAESSA OLET ALTTI INA

Nwimm5mLLE MSERSATEILYLLE ALP KA7S0 SATEESEEN I

.Remove the compact disc and cassette tape if there should be one on the disc tray or in the cassette lid.

●switch the power OFF, and unplug the AC power cord fron an AC outlet.

●AIIwiring 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.

.Repair the (+)screwdriver more than 17 cm.

1. FRONT CABINET AND REAR CABINET

(1) Remove the battery lid.

(2) Remove the 7rear cabinet mounting screws. (})

2. TUNER BLOCK

,,,/’1. ~

-1-

—

REMOVAL AND INSTALLATION

3. POINTER SETTING

111 POINTER

4. CD BLOCK

5. TAPE MECHANISM

-2-

TUNER ADJUSTMENTS

●Use aplastic screw driver for adjustments.

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

Supply voltage :DC12.OV

Speaker impedance

Standard output

Function switch

BASS MID TREBLE

4ohm

50 mW (450 mV)

RADIO

Center L2005

PARTS LOCATION L2101

&VCT-1 VCT-3

VCT-2

~210*’ \J

N“

XF213

J2116

J2118c

1C201 ~

@) PIN

1C2106”” Jxa

ADJUSTMENT BAND SELECT SWITCH :AM

Step Adjusting

Circuit

Connections SG Frequency Position of tuning dial Adjustment VTVM

Input Ootput Oscilloscope

Closed the output Connect sweep

terminal by sweep generator to C2106

generator, it place to (H)& J2108 (G) 455 kHz Low XF213 -4

L2005.

Connect AMSG to Connect VTVM to 517 kHz Low end L2008 Max.

Test Loop speaker terminals 1750 kHz High end VCT -4

1IF

2Tuning

3coverage

4Tracking

Connect AMSG to Connect VTVM to 600 kHz 600 kHz L2005 Max.

Test Loop speaker terminals 1400 kHz 1400 kHz VCT -3

I6IRepeatadjustrnents

2. FM ADJUSTMENT BAND SELECT SWITCH :FM

Adjusting Connections

Step SG Frequency

Circuit Input Ootput

VTVM

Oscilloscope

Position of tuning dial

Low

Adjustment

connect sweep 9en- Connect sweep gen-

1IF eratorto IC201 0eratorto C2106 (H) 10.7 MHz

(H) &J2118 (G) &J2108 (G)

...

2Connect FM SG to

Tuning Connect VTVM to

87 MHz

J2116 (H)

3coverage speaker terminals

&J2118 (G) 109 MHz

Low end L2102

VCT -2

Max.

High end

4Connect FM SG to Connect VTVM to 90 MHz

Tracking J2116 (H)

5speaker terminals

&J2118 (G) 106 MHz

6Repeat adjustments

L2101

VCT -1

90 MHz

106 MHz

Max.

-3-

TAPE DECK ADJUSTMENTS

1. HEAD REPLACEMENT 4. MOTOR AND BELT REPLACEMENT

●

Be sure to clean the heads before attempting to make any

adjustments.

After replacement, demagnetize the heads by using ade-

gausser.

All wiring should be returned to the original position after

work is completed.

After completion of the adjustment, use thread lock (TB-

1401 B) to secure the azimuth adjustment screws.

—

2. HEAD AZIMUTH ADJUSTMENT

●Be sure both channels (1 and 2) are the same level (Using

adual-channel oscilloscope).

.After completion of the adjustment, use thread lock (TB-

1401 B) to secure the azimuth adjustment screws.

(1) Insert the test tape (VTT-703, etc. :10 kHz) for azimuth ad-

justment into tape TAPE A.

(2) Press tape TAPE A’s PLAY button.

(3) Use across-tip screwdriver to turn the screw for adjust-

ment of the tape TAPE Aazimuth so that the left and riaht

outputs are maximized while tape TAPE

(4) Press the tape TAPE A’s STOP button.

(5) Repeat procedure for tape TAPE B.

3. MOTOR SPEED ADJUSTMENT

Ais playing back.

(I)lnsert the test tape (MTT-111 N, etc., 3000 Hz).

(2) Press the PLAY button.

(3) Ajust the VR405 so that the frequency counter becomes

3,000 Hz.

5. CHECKING THE MECHANISM TORQUES AND TENSION

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

IMeasurement ITake-up torque IBack tension ITa~e tension 1

Cassette for PLAY:TW-2111 APLAY:TW-2111 ADrive-power cassette

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- 120 gr.cm --- ---

-4-

REPLACEMENT OF CD MECHANISM

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

●It is very important that the spindle motor (which 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 eccelentricity.

●When harldlirlgthepickup, 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.

1. Replacement of the spindle motor

●First, prepare the new turntable (CM3-2) and new special

washer (CM3-4) for replacement. CM3-2

The removed turntable will be deformed by the heat of the

soldering iron, and cannot be reused.

●Prepare dial type calipers.

(1)The attached bonding material can be dissolved by using a

60 Wsoldering iron to heat the shaft at the under part of

the turntable (CM3-2) for about one minute.

~l##& -

(2) The turntable can then be removed from the shaft by very ----

carefully applying torte upward at the center of the lower

surface of the turntable.

(3) Remove the two screws (CM3-3) and remove the spindle

motor (CM3-5).

(4) Attach the special washer (CM3-4) to the spindle motor.

(5) Apply asmall amount of amixture of the “Three Bond

2001 and 201 5F” bonding materials to the motor’s shaft.

(6) Initial the turntable as shown in the figure. Secure the turn-

table 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 mater Ial

at the top of shaft

IunIR110

+Olrnm

\CM2

(SHAFT)

Iu u J

Be sure to wipe away

the bonding mater!al

\CH~CK PUL.LEV

—1 ~J-

CM3-2

(TuRN

TABLE)—CM3-5

](sP]NDLE

MOTOR SHAFT )

2. Confirm of inclination for the turntable

(1) Connect the digital voltmeter as shown in the. figure

(2) Set the test disc (YEDS 18 =SONY or etc.), press the

PLAY button (Playback for the most inner music). F+ +

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

voltmeter. 10 kohm

Unit Digital

(4) Access the most outer music, press the PLAY button 0.0033PF Voltmeter

(Playback for the most outer music).

(5) Again at this time, record voltage value to indicate at the Vc

digital voltmeter. Low Pass Filter

(6) For reference at the recorded voltage of the most inner

music, Confirm at f300 mV less than for recorded voltage

of the most outer music

-5-

REPLACEMENT OF CD MECHANISM

.- 3. Replacement and lubrication of the pickup

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

the section regarding the pickup when the unit is moved or

transported.

(1) Remove the apickup rail (CM2) with care fixing the latch

with way driver from bottom part of chassis (CM3-1 ).

(2) The pickup (CM9) can now be remove once the apickup

rail (CM2) have been taken out.

●When removing or inserting the apickup rail from or into

chassis, take care not to exert excessive force.

●If the pickup is reconditioned of replaced, be sure to wipe

the rails clean and also apply acoating of FLOIL (G-474B)

to there entire circumference and entire length. When ap-

plying the grease, do not allow any grease to adhere to

any other parts.

(3) Pass the apickup rail (CM2) through the new pick up

(CM9).

●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 re-

placed.

‘“v! J:c”

SHORT

4. Checking the action of the CD mechanism 5. Replacement of the sled motor

(1) Disconn~ct the socket (for the sled motor power supply) (1) Remove the two screw (CYI )and remove the sled motor

. .from the P. W. Board. (CM5).

(2) APPIY avoltage of DC 2.0 Vto 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 polar-

ity.

(4) The current during sled motor action varies according to CM3-1

the positional relationshiping of gears (CM7 and CM8).

(5) If the current exceeds 40 mA, remove the gears (CM7 and

CM8).

(6) APPIY asmall amount of aFLOIL (G-474B) bonding materi-

als to the chassis shafts.

-6-

REPLACEMENT OF CD MECHANISM

6. 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 ap-

proximately 30 msec. :there is then again areverse opera-

tion, and movement to the position at which the switch is

switched OFF.

(2) Rotation continues for about 30 msec. after the switch is

switched OFF, and then the pickup stop at home position.

(

CONFIRM OF CD SECTION

1. Preparation

●Measuring instruments and Test disc.

(I)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 Section P. W. Board checked at automatic checker.

2. Confirm of general operation

(l) Set the test disc.

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

(3) Press the FFWD or REW button, then confirm the most inner music or most outer music accessing at speedy.

(4) Press the STOP button

CD Main and Display P.W. Board (Solder Side)

3. Confirm of eye pattern

(1)

Connect an oscilloscope to pin 41 (RF) of [Cl 01 and VR

point.

(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.

IC1OI PIN41 (RF)

OSCILLOSCOPE

VR POINT

-7-

EXPLODED VIEW (CABINET &CHASSIS)

\‘ ,. \

-8-

PARTS LIST

PRODUCT SAFETY NOTICE

EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED D~BING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC

SYMBOL ~IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS IN WHICH SAFETY CAN BE OF SPE-

CIAL SIGNIFICANCE. WHEN REPLACING ACOMPONENT IDENTIFIED &USE ONLY THE REPLACEMENT PARTS DESIGNATED, OR

PARTS WITH THE SAME RATINGS C)F RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST IN THIS

MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MIUST BE MADE TO DETERMINE THAT EXPOSED PARTS ARE

ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFC)RE RETURNING THE PF?ODUCT 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/4W carbon type and Oohm chip resistors.

Regular type capacitors are less than 50V and less than 1000pF type of Ceramic type and Electrical type.

N.S.P

‘ACKlb

Ref. No

:Not available as service parts.

i&ACCESSORIES

Part No.

614 271 6540

614 267 8480

614 267 8473

614 256 5674

614 271 6663

614 231 6832

645 009 6143

Lh614 25CJ 6578

~614 256 5292

CABINET &CHASSIS

Ref. No

I::

~12

~13

i14

!15

Part No.

614 267 8213

614 267 5168

614 267 5175

614 271 6069

614 270 3250

614 267 5144

614 270 4226

614 267 4963

614 267 8299

614 263 4912

614 267 4567

614 267 4574

614 267 5090

614 267 4970

614 26? 4987

614 267 4994

614 267 5007

614 267 5014

614 267 5021

614 267 5038

614 267 5045

614 267 5052

614 267 5069

614 267 5076

614 267 5083

614 267 5250

614 248 2551

614 268 5716

614 244 8199

412 032 6408

614 25& 1544

614 247 6048

614 217 9291

412 032 6408

Description

CARTON CASE

CUSHION,TOP

CUSHION,BOTTOM

SHEET,SET

INSTRUCTION MANUAL

LABEL,SAFETY,LASER CLASS

REMOCON.MCD-S870

POWER CORD,AC-IN

Ref. No.

4Fi

Description

ASSY,CABINET,FRONT

LID,CASSETTE,TAPE B

LID,CASSETTE,TAPE A

ASSY,CABINET,REAR

HANDLE

LID,CD

LID,BATTERY

KNOB, ROTARY,TUNING

KNOB, ROTARY,VOLUME

KNOB,ROTARY,BASS.MIDOTREBLE

BUTTON,CD,OPEN

BUTTON,CD OPERATION

KNOB,SLIDE,FUNCTION

KNOB,LEVER,(B)REC

KNOB,LEVER,(B)PLAY

KNOB,LEVER,(B)REW

KNOB,LEVER,(B)FFW

KNOB,LEVER, (B)EJECT

KNOB,LEVER, (B)PAUSE

KNOB, LEVER,(A)MODE

KNOB, LEVER,(A)PLAY

KNOB,LEVER, (A)REW

KNOB,LEVER,(A)FFW

KNOB, LEVER,(A)EJECT

KNOB, LEVER, (A)DIRECTION

~ANEL.TOP

V3SY,PULLEY,CD CHUCKING

;PRING,WIRE,CD OPEN

LSSY,GEAR,CD OPEN DUMP

3CREW,SPECIAL,CD-DUMPER

$LIDE,CD OPEN

;USHION,CD MECHANISM

SPRING,COMP,CD MECHANISM

;CREW,SPECIAL,CD MECHANISM

jCREW,SPECIAL,CASSETTE-GEAR

!3’2

Part No.

614 268 6188

614 244 8199

614 225 1744

614 10B 2929

614 247 2941

614 267 5199

614 267 5229

614 267 5106

614 267 8282

614 267 4840

614 267 5281

614 267 5236

614 267 5274

614 268 5402

614 26B 5419

614 268 5426

%XINGPARTS

Ref. No,

YCJ1

Y02

YCt3

YL?4

Yll

Y12

Y13

Y14

Y21

Y2.2

Y2?3

Y.24

Y&i

Y2%

Part No.

411 021 4906

411 021 4104

411 002 9104

411 021 4906

411 020 8905

411 021 3503

411 021 4005

411 025 2007

411 021 4005

411 022 2802

411 020 9100

411 021 4005

411 020 9100

411 021 4005

411 098 7107

411 085 1200

Description

SPRING,WIRE,CASSETTE

ASSY,GEAR,CASSETTE OPEN DUPM

BRACKET-M,MECHA KNOB LEVER

BRACKET,R/P

SPRING,PLATE,R/P

LEVER,R/P

MOUNTING,TUNER

KNOB,LEVER,BAND

GEAR,VC,TUNER

GEAR,TUNER

SHAFT,TUNER

MOUNTING,SHAFT

POINTER

ASSY,BOX,FRONT, LEFT

ASSY,BOX, FRONT,RIGHT

ASSY,BOX,REAR

Description

SCR S-TPG BIN 3X20,CABI-REAR

SCR S-TPG BIN 3X12,PANEL TOP

SCR PAN 3X8,ROD ANT

SCR S-TPG BIN 3X20,

SPEAKER BOX(L)(R)

SCR S-TPG BRZ+FLG 3X1O,

SPEAKER(L)(R)

SCR S-TPG BIN 3X1O,

MECHA-BUTTON-BRACKET

SCR S-TPG BIN 3X12,CD PWB

SCR S-TPG BIN 3X12,

TAPE MECHANISM

SCR S-TPG PAN 2X4,R/P

SCR S-TPG BIN 3X12 R/P LEVER

SCR S-TPG FLT 3X10,R/P

SCR S-TPG BRZ+FLG 3X12,P.T

SCR S-TPG BIN 3X12,AC SOCKET

SCR S-TPG BIN 3X12,

MOUNTING TUNER

SCR S-TPG BIN 3X12,

MOUNTING SHAFT

SCR S-TPG BRZ+FLG 3X12,

BAND LEVER

SCR S-TPG BRZ+FLG 3X12,GEAR

SCR S-TPG BIN 3X12,TUNER PWB

BOLT HEX C-SCT 2.6X12,

VC-GEAR

WASHER OUT TW 2.6,VC-GEAR

-9-

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