Kenwood LSN-302, LSN-352, RXD-302, RXD-302-E, RXD-352 Service manual

...

MINI HiFi COMPONENT SYSTEM

DISC SKIP

DISC

INPUT BAND

PHONES

EX.BASS TUNING MODE

MULTI CONTROL

SELECT

DISPLAY

ENTER

DEMO

ON/STANDBY

TAPE A/B

REC/ARM

VOLUME

PLAY

REC/ PLAY

RXD-302/302E/352/352E/372S LS-N302/N352

SERVICE MANUAL

OPEN/CLOSE button (K29-7646-08)

Front window (A29-1071-08)

POWER button (K29-7650-08)

Knob (JOG) (K29-7658-08)

EX. BASS button assy (K29-7642-08)

Knob (STOP) (K29-7654-08)

DISC button bass assy (K29-7641-08)

PLAY PAUSE button (K29-7648-08)

CD door (A60-1723-08)

Knob (VOLUME) (K29-7652-08)

Headphone jack (E11-0386-08)

Tuning button assy (K29-7643-08)

PLAY button (K29-7656-08)

Cass window L (B10-3527-08)

Cass door L (A53-2158-08)

**Refer to page 2 if you want to know system configuration.

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

Refer to service manual RXD-251/301/301E/301W/351/ 351E/351W/371S (B51-5454-00), if you require CD MECHANISM OPERATION DESCRIPTION in detail.

Illust. is RXD-352M.

KENWOOD-Crop. certifies this equipment conforms to DHHS Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.

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

Cass window R (B10-3528-08)

Cass door R (A53-2159-08)

SYSTEM MAIN UNIT DESTINATION SPEAKER XD-302 RXD-302 E3 LS-N302 XD-302E RXD-302E E4 LS-N302 XD-352 RXD-352 TEMXY LS-N352 XD-352E RXD-352E E2 LS-N352 XD-372S RXD-372S M2 LS-N352

AM (T90-0815-08)

loop antenna (1)

Remote (A70-1320-08) : RC-352

control unit (1)

Batteries (R6/AA) (2)

FM indoor antenna (1)

Europe and U.K. Other countries

AC (E03-0115-05)

plug adaptor (1)

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

(T90-0847-08): MXYM2(T90-0836-05): TEE2E3E4

RXD-302/302E/352/352E/372S

Operation to reset

The microcomputer may fall into malfunction (impossibility to operate, erroneous display, etc.) when the power cord is unplugged while power 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.

Press the "POWER" key while holding the Stop (7) key of the CD section pressed, to switch off the power, and then switch the power on again after a few seconds.

÷ Please note that resetting the microcomputer clears the contents

stored in and returns and to condition when it left the factory.

CONTENTS / ACCESSORIES / CAUTIONS

CONTENTS / ACCESSORIES / CAUTIONS...............2

EXTERNAL VIEW........................................................3

BLOCK DIAGRAM.......................................................4

CIRCUIT DESCRIPTION.............................................5

ADJUSTMENT............................................................ 7

Accessories

PC BOARD ................................................................11

SCHEMATIC DIAGRAM............................................15

EXPLODED VIEW .....................................................29

PARTS LIST...............................................................32

SPECIFICATIONS .......................................Back cover

System configuration Cautions

RXD-302/302E/352/352E/372S

EXTERNAL VIEW

Top cabinet (A01-3725-08)

Phono jack (E63-1073-08)

Lock terminal board (E70-0108-08)

Antenna terminal (E70-0070-08)

Slide switch (S62-0083-08)

AC power cord (E30-2906-08)

Illust. is RXD-352M.

100K

100K100K100K100K100K100K 100K

TUNER

TAPE

A/B

PLAY AMP.

ALC

PLAY

R/P

OSC

BIAS

(Q213,L201)

Q205

Q203 Q204

Q206

Q201Q202

TAPE OUT

Q403,404

REC BUFFER

TAPE OUT

REC. OUT

REC IN

DECK A/B SW.

B+

PRE. SET EQ

PRE-AMP

IC402

RL501

Q408,

409

MUTE

SYSTEM

POWER

IC501

+Vcc

-Vcc

Q501-503

DETECTOR

u-COM

SPEAKER

PROTECTOR

+12V

506

Q505,

MUTE

JACK

SPEAKER

HEADPHONES

+5.5V

Q706

Q707

Q705

+Vcc

(SWITCHED)

to X'FORMER

-35V

Q708

+12V

-Vcc

CN702

D709

D710

Q702

FLD DISPLAY

IC601

u-COM

KEY

MATRIX

CN05-

to CD PCB

to MAIN PCB

AMP FILTER

TUNE

AMP

MIX

IFT CF1

BUFFOSC

TUNE

AMP

CF2

TUNE

AM RF

AMP

Q106

FM SECTION

Q101

PLL

u-COM

IC201

L.P.F

AM SECTION

V.T.

AM ANT

GND

FM ANT

OUT

MIX

BUFF

AMP

TUNE

AMP

AM RF

TUNE

OSC

ANT

PLL

L.P.F

AMP

IC201

u-COM

AMP

Q106

IFT CF1

FILTER

AM SECTION

FM SECTION

CF2

OUT

IC102

TUNE

FM RF

OSC

Q102

IC01 CXA1992BR

RF SIGNAL PROCESSING/SERVO AMP

PROCESSOR W/DAC

DIGITAL SIGNAL

CD POWER DRIVER

IC03 BA5936S

IC02 CXD2589Q

XTL01

33.86MHz

MOTOR

DISC

MOTOR

FEED

TRACKING

FOCUS

TRAY MOTOR

T/T MOTOR

SW.

LIMIT IN

OUTPUT

AUDIO

CONTROL SW.

S01-04

Rch

Lch

u-COM

AUX

BASSMIDDLETREBLEVOLUME

SPKR ATT LEFT

PRE. SET EQ

VOLUME MIDDLETREBLE BASS

SUPPLY

SPKR ATT

LEFT

I CBUS DECODER+ LATCHES

INPUT MULTIPLEXER

+GAIN

VREF

0/30 dB 2dB STEP

Lch

Rch

R/P SWITCHING

Lch

Rch

REC. AMP.

-Vcc 12V

+Vcc 12V

JK601

AMP.

PRE. AMP.

IC602 SUB WOOFER

B +12V

FRONT PCB

MOTOR SOL.

7.2MHZ

V.T

IFT

IC201

FM FRONT-END

FM RF IC101

TUNER PCB UNIT

CD MECHA. UNIT

TUNER PCB UNIT

MAIN PCB/FRONT PCB

IC401

RXD-302/302E/352/352E/372S

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

CD MECHA

(9140-C1)

DECK MECHA

IC01 IC601 IC201

RF AMP/SERVO

(CXA1992BR)

DECK PLAY/REC EQ IC

(TA8189N)

IC02 IC102

MAIN U-COM

DSP

(CXD2589Q)

FM/AM/MPX IC

(LC1833L)

LC867240A-5L36

IC03 IC103

BTL DRIVER

(BA5936S)

PLL IC

(LC72131D)

IC801 IC401

FL CONTROLLER

(M66004SPA)

AUDIO CONTROL IC

(TDA7439)

0.29

0.61

0.99

1.38

1.82

2.3

2.77

1. Main microprocessor LC867240A-5L36(IC601)

1-1 Microprocessor periphery block diagram

RXD-302/302E/352/352E/372S

1-2 VOLTAGE KEY/BAND MATRIX

Pin No. Name I/O Description Active

1 PLL-CE O CE OUTPUT (LC72131) H: DATA L: ADDRESS 2 XRST I RESET (CXD2589Q) L: ON 3 PLL-DO O DATA OUTPUT (LC72131) 4 PLL-DI I PLL DATA INPUT (LC72131) 5 PLL-CLK O CLK OUTPUT (LC72131) 6 SO O DATA OUTPUT (CXD2589Q) 7 SQSO I SUB CODE INPUT(CXD2589Q) 8 SQCK O SUB CODE CLOCK OUTPUT (CXD2589Q) 9 XLAT O LATCH OUTPUT (CXD2589Q)

10 – –

– – –

–

NOT USED 11 SENS1 I SENS1(CXD2589Q) 12 RESET I uCOM RESET H: NORMAL L: RESET 13 POWER DOWN I POWER DOWN INPUT L: POWER DOWN 14 SENS2 I SENS2(CXD2589Q) 15 VSS GND

16,17 X1,2 Xtal 6.0MHz

18 VDD1 +5V

19-21 KEY1-3 I KEY 1-3 INPUT

22 VSS GND 23 L-METER L I LEVEL METER L,R 24 – I NOT USED 25 MODE-SW I DECK MODE SWITCH 26 BAND I BAND SWITCH 27 SCOR I SUB-CODE SYNCH DETECT (CXD2589Q) 28 PROTEC I PROTECTION IN H: PROTECT 29 REMOTE I REMOTE SIGNAL INPUT L: ON

30,31 ENC A,B I VOLUME ENCODER INPUT A,B

32 PIC-UP I PICK UP UP SWITCH 33 PIC-DOWN I PICK UP DOWN SWITCH 34 DISC-COUNT I DISC COUNTER SWITCH 35 T.T-SW I TURNTABLE SWITCH 36 TRAY-OPEN I TRAY OPEN SWITCH 37 TRAY-CLOSE I TRAY CLOSE SWITCH 38 MOTOR+ O T.T./U.D MOTOR + 39 MOTOR- O T.T./U.D MOTOR 40 TRAY-M + O TRAY MOTOR + 41 TRAY-M - O TRAY MOTOR 42 T,T-MSP O TURNTABLE MOTOR SPEED 43 CD-VDD O CD VDD CONTOROL(BA5936S MUTE) H: CD

44-51 –

– –

O NOT USED 52 LED-STBY O LED STANDBY ON/OFF L: ON 53 LED-TIMER O LED TIMER ON/OFF L: ON

54,55 DECK A,B I DECK MECHA MODE SWITCH A,B H: STOP L: PLAY

56 VDD +5V 57 VSS GND

58,59 HALF A,B I DECK MECHA HALF SWITCH A,B L: EXSIT

60 REC-FEW-SW I REC FEW SWITCH L: HOOK EXSIT

1-3 Pin description

Pin No. Name I/O Description Active

61 REC-REV-SW I REC REV SWITCH L: HOOK EXSIT 62 A-PH I A DECK REEL SENSOR 63 B-PH I B DECK REEL SENSOR 64 DECK VCC O DECK MECHA VCC H: PLAY L: STOP 65 A SOL O A DECK SOLENOID CONTROL H: ON L: OFF 66 B SOL. O B DECK SOLENOID CONTROL H: ON L: OFF 67 DUBBING O DUBBING CONTROL H: DUBBING L: NORMAL 68 REC O REC CONTROL H: REC L: OTHER 69 REC-MUTE O REC MUTE H: OTHER L: REC 70 BIAS O BIAS ON/OFF CHANGEOVER CONTROL H: REC L: OTHER 71 A/B O A/B DECK MECHA CHANGEOVER H: A DECK L: B DECK 72 BEET CANCEL O REC BEET CANCEL H: ON L: OFF 73 TAPE-MUTE O DECK PLAY OUTPUT MUTE H: ON L: OFF

74-78 – –

––

–

– –

–

NOT USED 79 SP-RLY O SPEAKER RELAY ON/OFF H: ON L: OFF 80 NOT USED 81 MODE-SW4 I MODE SWITCH 4 SHORT WAVE H: EXSIT L: NONE 82 VSS GND

83,84 ENC A,B I JOG ENCODER(MULTI CONTROL) A,B L: ON

85 FOK I FOCUS OK OUTPUT (CXD2589Q) H: ON 86 STEREO I FM STEREO IN H: MONO L: STEREO 87 SDA I/O AUDIO CONTROL IC (TDA7439) DATA 88 SCL O AUDIO CONTROL IC (TDA7439)CLOCK 89 VSS2 GND 90 VDD2 +5V 91 – NOT USED 92 MUTE O SYSTEM MUTE H: OFF L: ON 93 TUNER-MUTE O TUNER MUTE H: ON L: OFF 94 AUDIO-MUTE O LINE (AUDIO) MUTE H: ON L: OFF 95 EX. BASS O EX BASS CONTROL H: ON L: OFF 96 – NOT USED 97 FL-CS O FL CONTROLLER (M66004DP) CS L: ON 98 FL-RESET I FL CONTROLLER (M66004DP) RESET L: ON 99 CLOCK O CLOCK OUTPUT (CXD2589Q)

100 2589Q MUT I MUTING SIGNAL INPUT (CXD2589Q) H: ON

RXD-302/302E/352/352E/372S

CIRCUIT DESCRIPTION

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

AUTO STOP

LEVEL

(A)

98.0 MHz MONO

1kHz, ±40kHz dev

30dBu (ANT input)

AUTO

98.0MHz

SFR101

Adjust SFR101 and

stop at the point

where FLD801( )

goes ON.

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

1. IF

(A)

98 MHz,1 kHz MOD

±75 KHz (DEV)

60 dBu (ANT INPUT)

(B) 98MHz T101

Maximum output

(Minimum distortion

LOW END

TRACKING

(A)

90MHz, 1 kHz MOD

±75 kHz (DEV)

35 dBu ( ANT INPUT)

(B) 90MHz L102 Maximum output

HI END

TRACKING

(A)

106MHz,1 kHz MOD

±75 kHz (DEV)

35 dBu (ANT INPUT)

(B) 106MHz TC101 Maximum output

4. VT –

Connect the DC

voltage meter to

TP2.

87.5 MHz L103 VT=1.0V±0.05V

108 MHz –

Check the

VT=7.0V±1.0V

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

LOW END

TRACKING

(A)

600 kHz or 603 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(B)

600 kHz

603 kHz

T103 Maximum output

HIGH END TRACKING

(A)

1400 kHz or 1404 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(B)

1400 kHz

1404 kHz

TC101 Maximum output

3. VT –

Connect the DC

voltage meter to

TP1.

531 kHz L104 VT=1.2V±0.05V

1602 kHz –

Check the

VT=7.3V±1.0V

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

LOW END

TRACKING

(A)

600 kHz or 603 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(B)

600 kHz

603 kHz

T104 Maximum output

HIGH END TRACKING

(A)

1400 kHz or 1404 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(B)

1400 kHz

1404 kHz

TC102 Maximum output

3. VT –

Connect the DC

voltage meter to

TP2.

531 kHz L105 VT=1.2V±0.05V

1602 kHz –

Check the

VT=7.3V±1.0V

FM SECTION (Except M2 type)

RXD-302/302E/352/352E/372S

ADJUSTMENT

FM SECTION (M2 type)

* Europ version no Adjustment

MW SECTION (Except M2 type)

MW SECTION (M2 type)

RXD-302/302E/352/352E/372S

FM 75 ½

AMFM 75½

ANTENNA

Other countries

Europe and U.K.

GND

(A)

(C)

(D)

AM-SG

FM-MPX-SG

POLAR SG

Dummy antenna

Oscilloscope

AC voltmeter

(B)

Distortion meter

TO TUNER UNIT CN101, pin 9 (Lch)

pin 7 (Rch) pin 8 (GND)

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

LOW END TRACKING

5.95 MHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(D)

(B) 5.95 MHz L201 Maximum output

HIGH END TRACKING

17.9 MHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(D)

(B) 17.9 MHz TC201 Maximum output

3. VT –

Connect the DC

voltage meter to

TP2.

5.95 MHz L202 VT=1.0V±0.05V

17.9 MHz –

Check the

VT=8.4V±1V

NO. ITEM

INPUT

SETTING

OUTPUT

SETTING

TUNER

SETTING

ALIGNMENT

POINTS

ALIGN FOR FIG.

LOW END TRACKING

162 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(D)

(B) 162 kHz T105 Maximum output

HIGH END TRACKING

270 kHz

1 kHz, 30% MOD

30 dBu (ANT INPUT)

(D)

(B) 270 kHz TC103 Maximum output

3. VT –

Connect the DC

voltage meter to

TP2.

153 kHz T106 VT=1.0V±0.05V

279 kHz –

Check the

VT=5.0V±1.0V

ADJUSTMENT

SW SECTION (M2 type)

LW SECTION (T type)

INSTRUMENTS CONNECTION

Oscilloscope

Frequency counter

AC voltmeter

{

PIN8PIN13

Lch: PIN13(LA08) Rch: PIN8(LA06)

–

IC401

(A)

MAIN UNIT

NO. ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

CASSETTE TAPE

DECK SETTINGS

ALIGNMENT

POINT

ALIGN FOR

FIG.

Unless otherwise specified : each ; switch should be set as follows : 0dBs = 0.775V BEAT SW : OFF I. Cassette mechanism section (REC/PB head adjustment)

[1]

Demagnetization and cleaning

––

Power OFF,

demagnetization,

cleaning play

REC/PB head,

erase head.

capstan, pinch

roller

Demagnetize the REC/PB head by head eraser. Clean the REC/PB head, erase head capstan and pinch roller with a cotton swab immersed in alcohol.

[2]

REC/PB head azimuth

MTT-114,

TCC-153

SCC-1727

10 kHz, -10dB

(A) PLAY

Azimuth

adjustment

screw

In a setting wher the output is maximized, adjust the azimuth adjustment screw so that the Lissajous figure appearing on the oscilloscope screen comes near to a line

slanted45° Note : The head should be installed in such a manner that it approaches the tape face.

II. PC board adjustment

< 1 > Tape speed

MTT-111

TCC-100

SCC-1727

3 kHz, -4 dB

(A) PLAY SFR201

Adjust so that Frequency is 3 kHz at the center of the tape.

< 2 > Playback level

TCC-120

315 Hz 0dB

(A) PLAY

Approx. -5dBm

reference level

< 3 >

Recording level

Put standard

test tape

(TCC-120)

into B deck.

Put standard

blank tape

into A deck.

(A)

Dubbing and

playback.

Approx. -5dBm

reference level

CASSETTE DECK SECTION

RXD-302/302E/352/352E/372S

ADJUSTMENT

INSTRUMENTS CONNECTION

RXD-302/302E/352/352E/372S

ADJUSTMENT

CD SECTION

No. ITEM

1 LASER POWER

Note: Type 4 disc : SONY YEDS-18 Test Disc or equivalent.(KTD-0✽)

INPUT

SETTINGS

(a) Laser power

0.08~0.15 mW

OUTPUT

SETTINGS

Apply the sensor section

of optical power meter

on the pickup lens.

PLAYER

SETTINGS

Press the

PLAY/PAUSE key.

ALIGNMENT

POINTS

when the diffraction

aligned with the RF

ALIGN

FOR

On the power from

0.08 to 0.15 mW,

grating is correctly

level of 0.6 Vp-p or

more.

FIG.

(a)

Pickup

Optical power meter

+ 22 hidden pages

Kenwood LSN-302, LSN-352, RXD-302, RXD-302-E, RXD-352 Service manual

CONTENTS / ACCESSORIES / CAUTIONS

Contents

Accessories

System configuration Cautions

EXTERNAL VIEW

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

1. Main microprocessor LC867240A-5L36(IC601)

FM SECTION (Except M2 type)

ADJUSTMENT

FM SECTION (M2 type)

MW SECTION (Except M2 type)

MW SECTION (M2 type)

SW SECTION (M2 type)

LW SECTION (T type)

CASSETTE DECK SECTION

CD SECTION