Kenwood RX-DM66-S, RX-DM66-H, RX-DM66 Service Manual

MICRO HI-FI COMPONENT SYSTEM

RXD-M66-H/M66-N/M66-S LS-M66-H/M66-N/M66-S/M66IT-H/M66IT-S

SERVICE MANUAL

(HM-636/636IT)

Front glass * (B10-)

Cassette lid * (A53-)

Knob * (K29-)

Panel ass'y * (A60-)

In compliance with Federal Regulations, following are reproduction of labels on, or inside the product relating to laser product safety.

Miniature Phone jack (E11-0399-05)

* Refer to parts list on page 21.

KENWOOD-Corp. certifies this equipment conforms to DHHS Regulations No.21 CFR 1040. 10, Chapter 1, subchapter J.

DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM.

RXD-M66/LS-M66

FM indoor antenna (1) (T90-0877-05)

AM loop antenna (1) (T90-0893-05)

Remote control unit (1) (A70-1568-05): EE1E2 (A70-1569-05): M1X1X2

Batteries (R6/AA) (2)

Use to adapt the plug on the power cord to the shape of the wall outlet. (Accessory only for regions where use is necessary.)

AC Plug Adaptor (1) (E03-0115-05)

The marking of products using lasers (For countries other than U.S.A., U.S.-Military and Canada)

The marking of this product has been classified as Class 1. It means that there is no danger of hazardous radiation outside the product. Location: Back panel

CLASS 1

LASER PRODUCT

CAUTION

VISIBLE LASER RADIATION WHEN OPEN. DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH OPTICAL INSTRUMENTS.

Inside this laser product, a laser diode classified as Class 3A laser radiation is contained as alerted by the internal caution label shown above. Do not stare into beam or view directly with optical instruments.

1 Remove the CD from the unit. 2 Press the CD 6 key.

3 Wait for some time and verify that the display

appears as above.

4 Wait a few seconds and turn the unit OFF.

Note related to transportation and movement

Before transporting or moving this unit, carry out the following operations.

Operation to reset

The microcomputer may fall into malfunction (impossibility to operate, erroneous display, etc.) when the power cord is unplugged while unit is ON or due to an external factor. In this case, execute the following procedure to reset the microcomputer and return it to normal condition.

Unplug the power cord from the power outlet, then

while holding the POWER or

key depressed, plug

the power cord again.

÷ Please note that resetting the microcomputer clears

the contents stored in and it returns to conditio n when it left the factory.

or

After resetting the microcomputer, the display will show as follow:

ACCESSORIES / CAUTIONS

Attention

Please contact our KENWOOD Service Department in your side if you want the service information; Circuit Description. Full

Described Parts list and so. Information is available to you by internet from us. On circuit description, refer to RXD-M55.

Accessories

System Configurations

SYSTEM RECEIVER SPEAKER HM-636-H RXD-M66-H LS-M66-H HM-636-N RXD-M66-N LS-M66-N HM-636-S RXD-M66-S LS-M66-S

HM-636IT-H RXD-M66-H LS-M66IT-H HM-636IT-S RXD-M66-S LS-M66IT-S

Cautions

2

DIGITAL

OUT

OPTICAL

AUX INPUT

L

R

GND

AM

ANTENNA

FRONT

SPEAKERS

(6-16

Ω)

L

-

+

R

FM 75

Ω

Metallic cabinet * (A01-)

RXD-M66/LS-M66

EXTERNAL VIEW

Tuner ass'y * (W02-)

Lock terminal board (E70-0123-15)

Pin jack (E63-1264-05)

Oscillating module (W02-1114-15)

AC power cord bushing (J42-0349-05)

AC power cord * (E30-)

* Refer to parts list on page 21.

3

RXD-M66/LS-M66

DISASSEMBLY FOR REPAIR

How to open the CD tray when it does not come out.

1. Insert a flat driver and so on to a square hole in the mechanism as shown in the figure.

2. Push a rack gear in the direction of arrow. (At this time, the tray comes out slightly frontward.)

3. The tray can be opened by hand.

4

RXD-M66/LS-M66

DIGITAL

OUT

OPTICAL

AUX INPUT

L

R

FRONT

SPEAKERS

(6-16

Ω)

L

-

+

R

(TAPE Lch),3 pin

X28 CN1

(TAPE Rch),5 pin

{

(A)

(B)

Fig.1

AC voltmeter AG

Oscilloscope AC voltmeter

Frequency counter

ADJUSTMENT

CD player adjustment

No.1ITEM

INPUT

SETTING

Insert the AC cord to AC wall outlet while holding down the [CD PLAY/PAUSE] key.

OUTPUT

SETTING

PLAYER

SETTING

ALIGNMENT

POINT

ALIGN FOR FIG.

LASER

CURRENT

Test disc

Type 4

Connect the DC

voltmeter to

CN23(#1 and #2) in

X29

Press the "PLAY" key

to check that the dis-

play is "03" or "05"

Note: Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02) LPF : Around 47kΩ + 390pF or so.

Cassette Deck adjustment

No

ITEM

INPUT

SETTING

ø. CASSETTE MECHANISM UNIT

Demagneti-

< 1 >

zation and

–

cleaning

SCC-1727

TCC−153 MTT−114

10kHz,

− 10dB

< 2 >

Azimuth of

the

REC/PLAY

head

TCC−110

< 3 >

TAPE SPEED

(NORMAL)

MTT−111

SCC−1727

3kHz

OUTPUT

SETTING

–

(A)

DECK

SETTING

Demagneti-

zation:

POWER OFF

Cleaning:

PLAY

ALIGNMENT

POINT

Recording

head, erase

head,capstan

pinch roller

RVS FWD

Trimming pot

in the motor.

–

220mV to 550mV

0dBs=0.775V

ALIGN FOR

Demagnetize the REC / PLAY head

with the head eraser. Clean the REC

/ PLAY head, erase head,capstan and

pinch roller using a cotton swab

slightly damped with alcohol.

Adjust the output to maximum and

adjust the azimuth adjustment screw for the Lissajours waveform pattern of the oscilloscope to become close to a

45° straight line.

Check the tape speed so that

3kHz(±2%) is obtained at the center

of the tape.

FIG.

¿. PC BOARD ADJUSTMENT

< 1 >

BIAS

CURRENT

SYSTEM CONNECTIONS

(B)

Connect the

AG to jack.

1kHz:

-30dBs 10kHz:

-30dBs

(A)

REC and

PLAY

VR 1 (L)

VR 2 (R)

(X28)

Record 1kHz and 10kHz alternately,

and adjust the bias current adjust-

ment potentiometer for the playback

levels (-21dBs)to become the same.

Fig.1

5

RXD-M66/LS-M66

No. ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

AMPLIFIER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR FIG.

Unless otherwise specified, the individual switches should be set as following : POWER : ON

1 IDLE CURRENT –

Connect a DC

voltmeter to CN11 ( 1 2 ), Rch CN11 ( 3 4 ), Lch

(X29)

VOLUME : 0

VR1 (L)

VR2 (R)

(X29)

4.4 mV

ADJUSTMENT

6

CD OPEN

R407

W508

W513

41

4443402718521

W514

W515

W516

W518

C408

C403

C406

R403

R402

R405

R406

C405

C404

C503

C504

C505

C506

R513

R521

R524

R501

R502

R503

R505

R506

R507

R508

R509

R510

R522

R523

R534

1

3

5

4

C507

SECONDARY

PRIMARY

YEL

240V120V

MAIN TRANSFORMER

F2

F1

T1.25A L 250V

WHT

21

AUX

TAPE PLAY

O.T.E

4MHz

SOUND

REPEAT

WHT

1

2

SKIP UP

SKIP DOWN

STANDBY/ON

STOP/

MODE

TUNIN

MODE

TUNER

CD

PLAY/PAUSE

2

117

16

WHT

SET/

DEMO

REC

W407

W405

C402

K401

14 1

R404

T401

R401

W403

W406

W404

W501

W511

W502

W504

W505

W506

W503

W507

13

46

1

11

12

22

23

33

34

44

EBC

R504

X501

E

B

G

IO

E

12

B

C511

R515

R514

R512

R511

C501

C502

R516

R517

R518

VOLUME

R520

R533

R535

R548

R547

R546

R545

R544

R543

R542

R541

R540

R539

R538

R537 R536

IC402

IC501

Q501

D408

Q401

Q402

D401

D402

D404

D405

D406 D407

D409

D503

S501

S502

S503

S504 S505

S506

S507

S508

S509

S510

S512

S513

S514

S515

WH401

S401

E502

ED501

P401

D403

CN402

CN403

CN404

IC401

E401

CN405

CN406

E503

CN502

A501

CN501

S516

WH501

S511

D501

CN503

WH502

X14 B/4

X14 D/4

X14-7492-70 A/4 (J70-1594-11)

X14 C/4

ACEG IBDFHJ

PC BOARD (Component side view)

1

2

3

4

5

6

7

Refer to the schematic diagram for the value of resistors and capacitors.

7

8