POWERED MULTIMEDIA SPEAKERS YST-MS50(M)sportsbil.com/yamaha/YST-MS50.pdf · service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore,

SERVICE MANUAL

CONTENTS

TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . . 1FRONT AND REAR PANELS . . . . . . . . . . . . . . . 1 – 2SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . . . . 5

1 0 0 7 7 8

SERVICE MANUAL

YST-MS50(M)POWERED MULTIMEDIA SPEAKERS

PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 6 – 8BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . 10PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 – 15PARTS LIST FOR CARBON RESISTORS . . . . . . . . 16

The contents of this Service Manual are applicable to the products with serial numbers of Z200001 and up.

YST-M

S50(M

)

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are alreadyknown and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personalinjury, destruction of expensive components, and failure of the product to perform as specified. For thesereasons, we advise all YAMAHA product owners that any service required should be performed by anauthorized YAMAHA Retailer or the appointed service representative.

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certificationor recognition of any applicable technical capabilities, or establish a principle-agent relationship of anyform.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, andservice departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevita-ble and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, pleasecontact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may haveaccumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to thisbuss).

IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to theunit.

IMPORTANT NOTICE

BASS

010

SPEAKERSMULTIMEDIA

POWERED YST-MS50

POWERED MULTIMEDIA SPEAKERS

VOLUME

YST-MS50(M)Y

ST-M

S50(

M)

TO SERVICE PERSONNEL

1. Critical Components InformationComponents having special characteristics are marked Zand must be replaced with parts having specifications equalto those originally installed.

2. Leakage Current Measurement (For 120V Models Only)When service has been completed, it is imperative to verifythat all exposed conductive surfaces are properly insulatedfrom supply circuits.

Meter impedance should be equivalent to 1500 ohm shuntedby 0.15µF.

AC LEAKAGETESTER OREQUIVALENT

EQUIPMENTUNDER TEST

INSULATINGTABLE

WALLOUTLET

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/orplastic (where applicable) components may also contain traces of chemicals found by the California Health andWelfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FORANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumesor expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your handsbefore handling food.

1

FRONT AND REAR PANELS

Leakage current must not exceed 0.5mA.

Be sure to test for leakage with the AC plug in bothpolarities.

Satellite Speakers Front Panel Satellite Speakers Rear Panel

Lch Rch Lch Rch

“CAUTION”“F1 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2.0A, 250V FUSE.”

CAUTIONF1 : REPLACE WITH SAME TYPE 2.0A, 250V FUSE.

ATTENTIONF1 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.0A, 250V.

A V

YST-MS50(M)Y

ST-MS50

(M)

Subwoofer Front Panel

2

Subwoofer Rear Panel

U and C models A modelB and G models

YST-MS50(M)Y

ST-M

S50(

M)

SPECIFICATIONS

Type ................................. Advanced Active Servo Technology

Output Power

Satellite ................. 20W+20W (1kHz, 4 ohms at T.H.D.=10%)

Subwoofer ................... 40W (100Hz, 5 ohms at T.H.D.=10%)

Input Sensitivity ...................... 200mV (1kHz, 4 ohms at 20W)

Input Impedance ....................................................... 25 kohms

Frequency Response .................................... 32 Hz to 20 kHz

Driver

Satellite

Tweeter ................................... 19mm (3/4") balanced dome

Magnetic shielding type

Midrange ........................................................ 8cm (3") cone

Magnetic shielding type

Subwoofer ................................................. 16cm (6-1/2") cone

Magnetic shielding type

Power Consumption ........................................................ 65 W

Power Supply

U, C models .................................................... AC120V, 60 Hz

A model ........................................................... AC240V, 50 Hz

B, G models .................................................... AC230V, 50 Hz

Dimensions (W X H X D)

Satellite ..................................................... 97 x 159 x 178 mm

(3-13/16" x 6-1/4" x 7")

Subwoofer .............................................. 350 x 210 x 321 mm

(13-3/4" x 8-1/4" x 12-5/8")

Weight

Satellite ................................................ 0.7 kg (1 lbs. 9 oz) x 2

Subwoofer ................................................ 8 kg (17 lbs. 10 oz)

Finish ....................................................................... White color

Black color

Accessories

3.5mm stereo mini plug cable (1.8m) x 1

RCA pin plug cable (1.8m) x 1

8 pin plug cable (1.8m) x 1

8 pcs of nonskid pad x 1set

* Specifications subject to change without notice.

Satellite Speaker

U . . . . . . . . . . . . . USA modelC . . . . . . . . . Canadian modelA . . . . . . . . Australian modelB . . . . . . . . . . . British modelG . . . . . . . . . European model

3

Unit : mm (inch)

DIMENSIONS

97 (3-13/16") 178 (7")

166(

6-17

/32"

)

159

(6-1

/4")

Subwoofer

210

(8-1

/4")

321

(12-

5/8"

)

350 (13-3/4")

YST-MS50(M)Y

ST-MS50

(M)

INTERNAL VIEW

4

Satellite Speakers

Subwoofer

wq e

r

y u

t

Note: The Satellite Speakers are available by the speaker unit (L ch or R ch).Individual parts of the Satellite Speakers are not available. (See page 14 and 15 of the PARTS LIST.)

Satellite Speaker (L ch)q MAIN (B) P.C.B.

Satellite Speaker (R ch)w MAIN (C) P.C.B.

e MAIN (D) P.C.B.

Lch Rch

Subwooferr MAIN (E) P.C.B.

t MAIN (A) P.C.B.

y SPEAKER UNIT

(Subwoofer)

u MAIN (F) P.C.B.

YST-MS50(M)Y

ST-M

S50(

M)

DISASSEMBLY PROCEDURES(Remove parts in the order as numbered.)

Fig. 2

Fig. 1

Disassemble of the Subwoofer1. Removal of the Rear Panel Ass’y.

a. Remove 8 screws ( q ) in Fig. 1, and remove the

rear panel ass’y.* Arrow marks ( ) are printed to identify the screws to be

removed.

b. Disconnect one connector in Fig. 1.

c. Disconnect the Speaker cord in Fig. 1.* When assembling the Rear Panel Ass'y, check to ensure

that the packing is not damaged so as to prevent air leak-

age from occurring.

2. Removal of the Front Panel Ass’y

The front panel assy is fixed to the cabinet with

dowels at 6 locations.

* As a screwdriver (for slotted head screw) is used

for removal, use special care not to cause damage

to the Cabinet.

a. Using the screwdriver insert in the gaps between the

front panel ass’y and cabinet (bottom side first), push

up the front panel ass’y.

b. Remove the front panel ass’y while taking it out.

(Front panel ass’y can not to remove completely.)

3. Removal of the Speaker

a. Set up the front panel ass’y in the direction of the

arrow, in Fig. 2.

b. Remove 4 screws ( w ) in Fig. 2, and remove the

speaker.

DowelsFront Panel Ass’y

Cabinet

Connector

Gaps

Speaker Cord

Rear Panel Ass’y

Speaker

Front Panel Ass’y

q

w

5

A B C D E F G H

1

2

3

4

5

6

YST-MS50(M)

6 7

MAIN ( A ) P. C. B. TO : SPEAKER (WOOFER)FROM : POWER CORD

WH

BE

FR

OM

: M

AIN

( F

)

FR

OM

: M

AIN

( E

)

TO R

IGH

TS

PE

AK

ER

TO L

EF

TS

PE

AK

ER

RE

WHWH: U, C

BE: A, B, GBL: U, C

BR: A, B, G

MAIN ( E ) P. C. B.

BASS

TO : MAIN ( A )

MAIN ( F ) P. C. B.

POWER

WH

BE

TO :

MA

IN (

A )

MAIN ( B ) P. C. B.

TOSUB Wo.L

+– + –

2.2µ

SPEAKER(MIDRANGE)

SPEAKER(TWEETER)

BL

RE

RE

PRINTED CIRCUIT BOARD (Component side)

Satellite Speaker (L ch)

SubwooferRef. No. LocationD2 B2D3 F3D4 F2D5 E2D6 E3D7 E3D8 E3

Ref. No. LocationIC1 F2IC2 E3IC4 C2IC5 C2IC6 E2IC7 E3

Semiconductor Location

Ref. No. LocationQ3 F3Q4 F2Q5 E2Q6 F2Q7 E2Q8 E2

A B C D E F G H

1

2

3

4

5

6

YST-MS50(M)

BLOCK DIAGRAM

8 9

MAIN ( C ) P. C. B.

TO : MAIN ( D )

VOLUME

(HEADPHONE)(POWER)

217

58

436

MAIN ( D ) P. C. B. TO S

UB

Wo.

INP

UT

2

INP

UT

1

R

+ –+–

2.2µ

SPEAKER(MIDRANGE)

SPEAKER(TWEETER)

RE

BL

RE

FROM : MAIN ( C )Q

2

Q3

Q8

SW1

PO

WE

RS

W2

F1

D2IC

4

GND

IN+ –

OUT

IC5

GND

INO

UT

~

PO

WE

RT

RA

NS

FO

RM

ER

Reg

ula

tor

(PO

WE

R)

Q1

35

VO

LU

ME

VR1

VR2

IR

JK4

INP

UT

1

INP

UT

2

JK3

Rch

SA

TE

LL

ITE

SP

EA

KE

R

Lch

SA

TE

LL

ITE

SP

EA

KE

R

IL

3

1G 4 7

6

JK2

82

5+1

2

+12

+12

PWS

TO SU

B W

o. TO

LE

FT

SP

EA

KE

R

TO R

IGH

TS

PE

AK

ER

OL

17

IC3

(NJM

4556

AL)

OR

RSP–

RSP+

TW

EE

TE

R

MID

RE

NG

E

+ +

JK1

(HE

AD

PH

ON

E)

– –

TW

EE

TE

R

MID

RE

NG

E

+ +– –

SU

BW

OO

FE

R

SP+

SP–

E

–12

3

1G

4

76

82

5

+12

E

OL

PWS

OR

RSP–

RSP+

JK5

–12

–12

35

–12

–12

+12

+12

17

H. P

. F

12dB

/oct

H. P

. F

12dB

/oct

–12

+12

–6dB

/oct

–12

+12

–12d

B/oc

t

EQ

Am

pIC

1,2

(NJM

4558

D)

Mu

te

Po

wer

Am

p.

IC6

(ST

K40

8-04

0E)

IC1

IC2

IC2

IC1

IC7

IC7

(NJM

4558

D)

+12

–12

27

20118

+12

16

–12

6

+12

7

–12

317

SWI

SRI

SLI

PWS1

RSP+

LSP+

PJ1

TO

SU

B W

o.

PJ2

16121498

5 3

1

+B –B

–B+B

BA

SS Rec

tifi

er

Q6

Q7

Q5

Q4

~

A. N

. I. C

ON

OFF

PRINTED CIRCUIT BOARD (Component side)

Satellite Speaker (R ch)

Ref. No. LocationIC3 B2

Q1 B2Q2 B2

Semiconductor Location

A B C D E F G H

1

2

3

4

5

6

I J K

7

8

YST-MS50(M)

SCHEMATIC DIAGRAM

* All voltage are measured with a 10MΩ/V DC electric volt meter.* Components having special characteristics are marked Z and

must be replaced with parts having specifications equal to thoseoriginally installed.

* Schematic diagram is subject to change without notice.

10

IC1, 2, 7 : NJM4558DDual OP-Amp

IC3 : NJM4556ALDual OP-Amp

–IN

1

2

+IN

1

3

–VC

C

4

+IN

2

5

–IN

2

6

OU

T2

7

+V

CC

8

OU

T1

1

–

+

–

+

IC6 : STK408-040E3 Channels AF Power Amp

2019181716151413121110987654321

THERMAL SENSOR

SUB CH.1–+ CH.3

–+

–+

CH.2

SU

B G

ND

N. C

.

CH

.2 –

VC

C

CH

.1 –

VC

C

CH

.1,2

,3 +

VC

C

CH

.1 O

UT

CH

.2 O

UT

PR

E –

VC

C

PR

E +

VC

C

CH

.1 IN

CH

.1 N

F

C. C

. C. B

IAS

CH

.2 N

F

CH

.2 IN

CH

.3 N

F

CH

.3 IN

CH

.2 –

VC

C

CH

.3 O

UTLIMITER

A.N.I.C

POWER AMP

LPF

HPF

PHONE AMP

POWER SUPPLY

0

0

0

0

00

11.7

00

0

-11.5

0

0

0

11.411.7 11.4

10.4

00

0

11.7

00

0

-11.5

0

0

0

-11.5

00

0

11.7

0

-27.

1

-0.2

-0.2

-0.1

-0.1

-24.

3

-0.1

-0.1

25.6

-25.

500

27.1

-27.

1

-27.

10

00

00

00 00

0

0

0

00

11.7

-11.5

-1.50

0

0

0

0

00

00 0

0.2

-11.

5

0.2

0

11.7

11.7

0

27.1

-11.5

0

-27.1

-27.1

AC43.2 27.1

+

–

+

–

SATELLITEMIDRANGEL ch

SATELLITETWEETERL ch

2.2µ

+

–

+

–

SATELLITEMIDRANGER ch

SATELLITETWEETERR ch

2.2µ

REBL

TOSUB Wo.

(HEADPHONE)

TO RIGHTSPEAKER

TO LEFTSPEAKER

MAIN (C)

VOLUME

(POWER)

INPUT 2

INPUT 1

WOOFER

+

–

MAIN ( D )

RE

BL

MAIN ( B )

TOSUB Wo.

MAIN ( F )

POWER MAIN ( E )

BASS

MAIN ( A )

WH

RE

BE

WH

BLWH

BRBE

ONOFF

NJM4556AL

NJM4558D

1SS133

Anode

Cathode

BCE

2SA1015 (O, Y)2SC1815 (Y, GR)2SC2878 (A, B)

RBV-402

DG

S

NJM78M12FA

STK408-040E

PIN CONNECTION DIAGRAM OF TRAN-

SISTORS, DIODES AND ICS.

+

–

2SK304 (E)

1

20

1: OUTPUT2: COMMON3: INPUT 3 2 1

NJM79M12FA

1:COMMON2:INPUT3:OUTPUT 3 2 1

1

48

1

8

–+

OUT1

–IN1

–VCC

+VCC

OUT2

1

2

3

4 5

+IN1 –IN2

+IN2

–+

6

7

8

YST-MS50(M)Y

ST-MS50

(M)

11

ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS :

C.A.EL.CHP : CHIP ALUMI. ELECTROLYTIC CAPC.CE : CERAMIC CAPC.CE.ARRAY : CERAMIC CAP ARRAYC.CE.CHP : CHIP CERAMIC CAPC.CE.ML : MULTILAYER CERAMIC CAPC.CE.M.CHP : CHIP MULTILAYER CERAMIC CAPC.CE.SAFTY : RECOGNIZED CERAMIC CAPC.CE.TUBLR : CERAMIC TUBULAR CAPC.CE.SMI : SEMI CONDUCTIVE CERAMIC CAPC.EL : ELECTROLYTIC CAPC.MICA : MICA CAPC.ML.FLM : MULTILAYER FILM CAPC.MP : METALLIZED PAPER CAPC.MYLAR : MYLAR FILM CAPC.MYLAR.ML : MULTILAYER MYLAR FILM CAPC.PAPER : PAPER CAPACITORC.PLS : POLYSTYRENE FILM CAPC.POL : POLYESTER FILM CAPC.POLY : POLYETHYLENE FILM CAPC.PP : POLYPROPYLENE FILM CAPC.TNTL : TANTALUM CAPC.TNTL.CHP : CHIP TANTALUM CAPC.TRIM : TRIMMER CAPCN : CONNECTORCN.BS.PIN : CONNECTOR, BASE PINCN.CANNON : CONNECTOR, CANNONCN.DIN : CONNECTOR, DINCN.FLAT : CONNECTOR, FLAT CABLECN.POST : CONNECTOR, BASE POSTCOIL.MX.AM : COIL, AM MIXCOIL.AT.FM : COIL, FM ANTENNACOIL.DT.FM : COIL, FM DETECTCOIL.MX.FM : COIL, FM MIXCOIL.OUTPT : OUTPUT COILDIOD.ARRAY : DIODE ARRAYDIODE.BRG : DIODE BRIDGEDIODE.CHP : CHIP DIODEDIODE.VAR : VARACTOR DIODEDIOD.Z.CHP : CHIP ZENER DIODEDIODE.ZENR : ZENER DIODEDSCR.CE : CERAMIC DISCRIMINATORFER.BEAD : FERRITE BEADSFER.CORE : FERRITE COREFET.CHP : CHIP FETFL.DSPLY : FLUORESCENT DISPLAYFLTR.CE : CERAMIC FILTERFLTR.COMB : COMB FILTER MODULEFLTR.LC.RF : LC FILTER ,EMIGND.MTL : GROUND PLATEGND.TERM : GROUND TERMINALHOLDER.FUS : FUSE HOLDERIC.PRTCT : IC PROTECTORJUMPER.CN : JUMPER CONNECTORJUMPER.TST : JUMPER, TEST POINTL.DTCT : LIGHT DETECTING MODULE

Note) Those parts marked with “#” are not included in the P.C.B. ass'y.

L.EMIT : LIGHT EMITTING MODULELED.DSPLY : LED DISPLAYLED.INFRD : LED, INFRAREDMODUL.RF : MODULATOR, RFPHOT.CPL : PHOTO COUPLERPHOT.INTR : PHOTO INTERRUPTERPHOT.RFLCT : PHOTO REFLECTORPIN.TEST : PIN, TEST POINTPLST.RIVET : PLASTIC RIVETR.ARRAY : RESISTOR ARRAYR.CAR : CARBON RESISTORR.CAR.CHP : CHIP RESISTORR.CAR.FP : FLAME PROOF CARBON RESISTORR.FUS : FUSABLE RESISTORR.MTL.CHP : CHIP METAL FILM RESISTORR.MTL.FLM : METAL FILM RESISTORR.MTL.OXD : METAL OXIDE FILM RESISTORR.MTL.PLAT : METAL PLATE RESISTORRSNR.CE : CERAMIC RESONATORRSNR.CRYS : CRYSTAL RESONATORR.TW.CEM : TWIN CEMENT FIXED RESISTORR.WW : WIRE WOUND RESISTORSCR.BND.HD : BIND HEAD B-TITE SCREWSCR.BW.HD : BW HEAD TAPPING SCREWSCR.CUP : CUP TITE SCREWSCR.TERM : SCREW TERMINALSCR.TR : SCREW, TRANSISTORSUPRT.PCB : SUPPORT, P.C.B.SURG.PRTCT : SURGE PROTECTORSW.TACT : TACT SWITCHSW.LEAF : LEAF SWITCHSW.LEVER : LEVER SWITCHSW.MICRO : MICRO SWITCHSW.PUSH : PUSH SWITCHSW.RT.ENC : ROTARY ENCODERSW.RT.MTR : ROTARY SWITCH WITH MOTORSW.RT : ROTARY SWITCHSW.SLIDE : SLIDE SWITCHTERM.SP : SPEAKER TERMINALTERM.WRAP : WRAPPING TERMINALTHRMST.CHP : CHIP THERMISTORTR.CHP : CHIP TRANSISTORTR.DGT : DIGITAL TRANSISTORTR.DGT.CHP : CHIP DIGITAL TRANSISTORTRANS : TRANSFORMERTRANS.PULS : PULSE TRANSFORMERTRANS.PWR : POWER TRANSFORMER ASS’yTUNER.AM : TUNER PACK, AMTUNER.FM : TUNER PACK, FMTUNER.PK : FRONT-END TUNER PACKVR : ROTARY POTENTIOMETERVR.MTR : POTENTIOMETER WITH MOTORVR.SW : POTENTIOMETER WITH ROTARY SWVR.SLIDE : SLIDE POTENTIOMETERVR.TRIM : TRIMMER POTENTIOMETER

ELECTRICAL PARTS

PARTS LIST WARNING

Components having special characteristics are marked Z and must be replacedwith parts having specifications equal to those originally installed.

Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTSList. For the parts No. of the carbon resistors, refer to last page.

YST-MS50(M)Y

ST-M

S50(

M)

12

P.C.B. MAIN

SchmRef. PART NO. Description Remarks

New Parts*

SchmRef. PART NO. Description Remarks

New Parts*

* AAX31030 P.C.B. MAIN (UC) 353086* AAX31040 P.C.B. MAIN (ABG) 353090CB1 VB858700 CN.BS.PIN 8PCB4 VD004600 CN.BS.PIN 3PCB5 VP206500 HOLDER.FUS EYF-52BCCB6 VP206500 HOLDER.FUS EYF-52BCC1 VJ836900 C.EL 10uF 16VC2 VV020100 C.EL 220uF 10VC3 FG211470 C.CE 47pF 50VC4 VJ836900 C.EL 10uF 16VC5 VV020100 C.EL 220uF 10VC6 FG211470 C.CE 47pF 50VC7 VJ836900 C.EL 10uF 16VC8 VJ836900 C.EL 10uF 16V

Z C9 VS741700 C.CE.SAFTY 0.01uF 275VC10 VF964800 C.EL 100uF 16VC11 UA654330 C.MYLAR 0.033uF 50VC12 UA654330 C.MYLAR 0.033uF 50VC13 VJ836900 C.EL 10uF 16VC14 UA654330 C.MYLAR 0.033uF 50VC15 UA654330 C.MYLAR 0.033uF 50VC16 VJ836900 C.EL 10uF 16VC17 UR759470 C.EL 4700uF 35VC18 UR857470 C.EL 47uF 35VC19 UR759470 C.EL 4700uF 35VC20 UR857470 C.EL 47uF 35VC21 FG212470 C.CE 470pF 50VC22 FG212470 C.CE 470pF 50VC23 UA655100 C.MYLAR 0.1uF 50VC24 VJ836900 C.EL 10uF 16VC25 UR866220 C.EL 2.2uF 50VC26 UR867100 C.EL 10uF 50VC27 UR866220 C.EL 2.2uF 50VC28 VJ836900 C.EL 10uF 16VC29 UR867100 C.EL 10uF 50VC30 UA655100 C.MYLAR 0.1uF 50VC31 UM397330 C.EL 33uF 16VC32 UA655150 C.MYLAR 0.15uF 50VC33 UA655390 C.MYLAR 0.39uF 50VC34 UJ668100 C.EL 100uF 50VC35 UJ668100 C.EL 100uF 50VC36 UM397330 C.EL 33uF 16VC37 FG211150 C.CE 15pF 50VC38 FG211150 C.CE 15pF 50VC39 UA655100 C.MYLAR 0.1uF 50VC40 VJ837200 C.EL 47uF 16VC41 VJ837200 C.EL 47uF 16VC42 UM397330 C.EL 33uF 16VC43 UA653390 C.MYLAR 3900pF 50VC44 UA655180 C.MYLAR 0.18uF 50VC45 UA653470 C.MYLAR 4700pF 50VC46 VD916400 C.EL 2.2uF 50VC47 VD916400 C.EL 2.2uF 50V

C48 UA654470 C.MYLAR 0.047uF 50VC49 UA654470 C.MYLAR 0.047uF 50VC50 FG214100 C.CE 0.01uF 50VC51 FG214100 C.CE 0.01uF 50VC52 UA653100 C.MYLAR 1000pF 50VC53 UA653100 C.MYLAR 1000pF 50VC54 VJ839100 C.EL 1uF 50VC55 VJ839100 C.EL 1uF 50VC56 UA655100 C.MYLAR 0.1uF 50VC57 UA655100 C.MYLAR 0.1uF 50VC58 UA655470 C.MYLAR 0.47uF 50VC59 UA655100 C.MYLAR 0.1uF 50VC60 VJ836900 C.EL 10uF 16VC61 VJ836900 C.EL 10uF 16VD1 VY660300 LED(gr) SLP-277B-51

Z D2 VC971500 DIODE.BRG RBV-402 4.0A 200V 069612D3 iF004600 DIODE 1SS133D4 iF004600 DIODE 1SS133D5 iF004600 DIODE 1SS133D6 iF004600 DIODE 1SS133D7 iF004600 DIODE 1SS133D8 iF004600 DIODE 1SS133

Z F1 KB000660 FUSE 400mA 250V(ABG)Z F1 VT951300 FUSE 2A 250V (UC)

IC1 XN324A00 IC NJM4558DVIC2 XN324A00 IC NJM4558DVIC3 XP844A00 IC NJM4556ALIC4 XJ602A00 IC NJM78M12FAIC5 XD343A00 IC NJM79M12FA

Z IC6 XV809A00 IC STK408-040E 25WIC7 XN324A00 IC NJM4558DVJK1 V3666400 JACK.MNI HTJ-035-27AJK2 V3317500 JACK.DIN 8PJK3 V3317400 JACK.MNI 1PJK4 V3317400 JACK.MNI 1PJK5 VV881000 CN.DIN 8P CMS5008-0101PJ1 V3407500 JACK.PIN 1PPJ2 VU581900 JACK.PIN 1PQ1 iC287820 TR 2SC2878 A,BQ2 iC287820 TR 2SC2878 A,BQ3 iA101590 TR 2SA1015 O,YQ4 iC1815M0 TR 2SC1815 Y,GRQ5 iA101590 TR 2SA1015 O,YQ6 iC1815M0 TR 2SC1815 Y,GRQ7 iA101590 TR 2SA1015 O,YQ8 V3028000 FET 2SK304 E

Z R37 HV455100 R.CAR.FP 100Ω 1/4WZ R38 HV455100 R.CAR.FP 100Ω 1/4W

R39 HV453470 R.CAR.FP 4.7Ω 1/4WR46 HV453470 R.CAR.FP 4.7Ω 1/4WR55 HV456100 R.CAR.FP 1KΩ 1/4WR57 HV454820 R.CAR.FP 82Ω 1/4WR58 HV453470 R.CAR.FP 4.7Ω 1/4W

YST-MS50(M)Y

ST-MS50

(M)

13

P.C.B. MAIN

SchmRef. PART NO. Description Remarks

New Parts*

SchmRef. PART NO. Description Remarks

New Parts*

R59 VE869300 R.MTL.OXD 0.1 2WZ R60 HV453100 R.CAR.FP 1Ω 1/4WZ R61 HV453100 R.CAR.FP 1Ω 1/4W

SW1 VS066500 SW.PUSH SPPH13-WZ* SW2 V8377400 SW.POWER SY16-52-4 354986

VR1 V2261700 VR A50KΩVR2 VZ496100 VR A5KΩ

BB070700 GND.MTLV4097600 HOLDER.LED LH-5-14Ei030086 SCR.BND.HD 3x8 MFZN2YEi330166 SCR.BND.HD 3x16 MFC2BL

A B C D E

1

2

3

4

5

6

7

YST-MS50(M)

EXPLODED VIEW

14

6-3

6-3-1

(E)5-1

8

202 x 1204 x 1

201 x 1203 x 1

6-12

6-4

6-6

1

5-6

302

301

5-75-33

5-31

5-8

5-20

5-12

5-17

5-17

5-1

5-14

5-31

5-15

5-15

5-16

5-16

5-32

5-34

5-11

6-12

5-5

5-1

6-1

6-2

6-11

2

2020

(A)

(F)

Ref.No. PART NO. Description Remarks Markets

New Parts*

YST-MS50(M)Y

ST-MS50

(M)

MECHANICAL PARTS

15

* 1 AAX31070 CABINET ASS'Y WH 353458* 1 AAX31060 CABINET ASS'Y BL 353457* 2 X2009A00 DRIVER, WOOFER 16cm JA1687 353214* 5-1 AAX31030 P.C.B. ASS'Y MAIN 353086 UC* 5-1 AAX31040 P.C.B. ASS'Y MAIN 353090 ABG

Z* 5-5 X2113A00 POWER TRANSFORMER 353131 UCZ* 5-5 X2114A00 POWER TRANSFORMER 353132 AZ* 5-5 X2115A00 POWER TRANSFORMER 353133 BGZ* 5-6 V8366300 POWER CORD 353587 UCZ* 5-6 V8366500 POWER CORD 355104 AZ* 5-6 V8366600 POWER CORD 355105 BZ* 5-6 V8366400 POWER CORD 355106 G5-7 CB072750 CORD STOPPER SR-4N-4 0785695-8 CB069250 BINDING TIE BK-1 080558

* 5-11 AAX31170 REAR PANEL 353582 UC* 5-11 AAX31180 REAR PANEL 353583 A* 5-11 AAX31190 REAR PANEL 353584 BG* 5-12 AAX31050 COVER 352528* 5-14 AAX31020 BUTTON POWER 3525295-15 V2583100 PACKING, A 0444145-16 V2583200 PACKING, B 044415

* 5-17 AAX31130 PACKING, MOLD 5x55 3354315-20 VZ655300 BUSH 0848495-31 EN335030 BIND HEAD BONDING TAP. SCREW 3x10 MFC2BL 0753215-32 EX601360 BIND HEAD P-TITE SCREW 3x10 MFC2BL5-33 ED330086 BIND HEAD SCREW 3x8 MFC2BL 0755735-34 EK396010 BIND HEAD S-TITE SCREW 4x8 MFC2BL 0751806-1 V3370900 FRONT PANEL WH 0496226-1 V3371000 FRONT PANEL BL 0496236-2 V3374600 PORT 050337

* 6-3 AAX31150 FRONT GRILLE ASS'Y WH 353371* 6-3 AAX31160 FRONT GRILLE ASS'Y BL 3533726-3-1 V3371600 EMBLEM6-4 V3374700 KNOB, VOLUME WH 0496566-4 V3374800 KNOB, VOLUME BL 0496776-6 V2490000 PORT RING 0443596-11 EK093030 BIND HEAD P-TITE SCREW 3x10 MFZN2Y6-12 EP600280 BIND HEAD P-TITE SCREW 3x8 MFZN2Y 0180798 VZ655300 BUSH 08484920 Ei340206 BIND HEAD TAPPING SCREW 4x20 MFZN2BL

ACCESSORIES201 VS494400 CABLE, MINI PLUG 1.8m 1pc 040878202 VT309500 RCA PIN CABLE 1.8m 1pc 019086203 VZ663800 DIN PLUG CABLE 8P 1.8m 1pc 354879204 VS104300 NON SKID PAD 8pcs/set 011716

* 301 AAX31080 SATELLITE SPEAKER UNIT L WH 351937L* 301 AAX31100 SATELLITE SPEAKER UNIT L BL 351942L* 302 AAX31090 SATELLITE SPEAKER UNIT R WH 351937R* 302 AAX31110 SATELLITE SPEAKER UNIT R BL 351942R

Parts List for Carbon Resistors1/6W Type Part No.

HF45 7100HF45 7110HF85 7120HF45 7130HF45 7150HF45 7180HF45 7220HF45 7240HF85 7270HF45 7300HF45 7330HF45 7360HF45 7390HF45 7470HF45 7510HF45 7560HF45 7620HF45 7680HF45 7820HF45 7910HF45 8100HF45 8110HF45 8120HF45 8150HF45 8180HF85 8220HF45 8270HF45 8300HF45 8330HF85 8390HF45 8470HF85 8560HF85 8680HF85 8820HF45 9100

HF85 9150HF85 9180HF85 9220HF85 9330

HF85 9470

1/4W Type Part No.HF45 7100HF45 7110HJ35 7120HF45 7130HF45 7150HF45 7180HF45 7220HF45 7240HJ35 7270HF45 7300HF45 7330HF45 7360HF45 7390HF45 7470HF45 7510HF45 7560HF45 7620HF45 7680HF45 7820HF45 7910HF45 8100HF45 8110HF45 8120HF45 8150HF45 8180HJ35 8220HF45 8270HF45 8300HF45 8330HJ35 8390HF45 8470HJ35 8560HJ35 8680HJ35 8820HF45 9100HJ35 9120HJ35 9150HJ35 9180HJ35 9220HJ35 9330HJ35 9390HJ35 9470

Value10 kΩ11 kΩ12 kΩ13 kΩ15 kΩ18 kΩ22 kΩ24 kΩ27 kΩ30 kΩ33 kΩ36 kΩ39 kΩ47 kΩ51 kΩ56 kΩ62 kΩ68 kΩ82 kΩ91 kΩ

100 kΩ110 kΩ120 kΩ150 kΩ180 kΩ220 kΩ270 kΩ300 kΩ330 kΩ390 kΩ470 kΩ560 kΩ680 kΩ820 kΩ1.0 MΩ1.2 MΩ1.5 MΩ1.8 MΩ2.2 MΩ3.3 MΩ3.9 MΩ4.7 MΩ

1/6W Type Part No.HF85 3100

HF85 3220HF85 3330HF85 3470HF85 3560HF45 4100HF85 4150HF45 4220HF85 4270HF45 4330HF85 4390HF45 4470HF45 4560HF45 4680HF45 4750HF45 4820HF45 4910HF45 5100HF85 5110HF45 5120HF45 5150

HF45 5180HF45 5200HF45 5220HF45 5270HF45 5330HF45 5390HF45 5430HF45 5470HF45 5510HF45 5560HF45 5680HF45 5820HF45 5910HF45 6100HF45 6120HF45 6150HF45 6180HF85 6200HF45 6220HF85 6240HF45 6270HF45 6300HF45 6330HF85 6360HF45 6390HF45 6470HF45 6510HF45 6560HF45 6680HF45 6820HF45 6910

1/4W Type Part No.HJ35 3100HJ35 3180HJ35 3220HJ35 3330HJ35 3470HJ35 3560HF45 4100HJ35 4150HF45 4220HJ35 4270HF45 4330HJ35 4470HF45 4470HF45 4560HF45 4680HF45 4750HF45 4820HF45 4910HF45 5100HJ35 5110HF45 5120HF45 5150HJ35 5160HF45 5180HF45 5200HF45 5220HF45 5270HF45 5330HF45 5390HF45 5430HF45 5470HF45 5510HF45 5560HF45 5680HF45 5820HF45 5910HF45 6100HF45 6120HF45 6150HF45 6180HJ35 6200HF45 6220HJ35 6240HF45 6270HF45 6300HF45 6330HJ35 6360HF45 6390HF45 6470HF45 6510HF45 6560HF45 6680HF45 6820HF45 6910

Value1.0 Ω1.8 Ω2.2 Ω3.3 Ω4.7 Ω5.6 Ω10 Ω15 Ω22 Ω27 Ω33 Ω39 Ω47 Ω56 Ω68 Ω75 Ω82 Ω91 Ω

100 Ω110 Ω120 Ω150 Ω160 Ω180 Ω200 Ω220 Ω270 Ω330 Ω390 Ω430 Ω470 Ω510 Ω560 Ω680 Ω820 Ω910 Ω1.0 kΩ1.2 kΩ1.5 kΩ1.8 kΩ2.0 kΩ2.2 kΩ2.4 kΩ2.7 kΩ3.0 kΩ3.3 kΩ3.6 kΩ3.9 kΩ4.7 kΩ5.1 kΩ5.6 kΩ6.8 kΩ8.2 kΩ9.1 kΩ

1992

1/4W TypeHF45

1/6W TypeHF85

1/4W TypeHJ35

10mm5mm

YST

-MS5

0 (M

)YST-MS50(M)

16