Yamaha YST-MS50 Manuel utilisateur

100675

POWERED MULTIMEDIA SPEAKERS

YST-MS50/YST-MS55D

TO SERVICE PERSONNEL ........................................... 1

FRONT AND REAR PANELS..................................... 1~2

SPECIFICATIONS....................................................... 3~4

INTERNAL VIEW ............................................................ 4

DISASSEMBLY PROCEDURES .................................... 5

USB PORT OPERATION CHECK............................ 6~17

■CONTENTS

BLOCK DIAGRAM .................................................. 18~19

PRINTED CIRCUIT BOARD ...................................20~22

IC DATA ........................................................................ 23

SCHEMATIC DIAGRAM ......................................... 24~25

PARTS LIST ............................................................ 26~37

SERVICE MANUAL

IMPORTANT NOTICE

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 already known 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 personal injury, destruction of expensive components, and failure of the

product to perform as specified. For these reasons, we advise all YAMAHA product

owners that any service required should be performed by an authorized YAMAHA

Retailer or the appointed service representative.

IMPORTANT:The presentation or sale of this manual to any individual of firm does not constitute

authorization, certification or recognition of any applicable technical capabilities,

or establish a principle-agent relationship of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research,

engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products.

Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation

to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity

your body may have accumulated by grounding yourself to the ground buss in the unit

(heavy gauge black wires connect to this buss).

IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before

you apply power to the unit.

YST-MS50/YST-MS55D YST-MS50 YST-MS55D

■TO SERVICE PERSONNEL

1. Critical Components information.

Components having special characteristics are marked and

must be replaced with parts having specifications equal to

those originally installed.

2. Leakage Current Measurement (For 120V Model only).

When service has been completed, it is imperative that you

verify that all exposed conductive surfaces are properly insu-

lated from supply circuits.

●Meter impedance should be equivalent to 1500 ohm shunted by

0.15µF.

●Leakage current must not exceed 0.5mA.

●Be sure to test for leakage with the AC plug in both polarities.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where

applicable) components may also contain traces of chemicals found by the California Health and Welfare 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 FOR ANY REASON

WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes

to solder/flux vapor!

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

food.

WALL

OUTLET EQUIPMENT

UNDER TEST

AC LEAKAGE

TESTER OR

EQUIVALENT

INSULATING

TABLE

■FRONT AND REAR PANELS

"CAUTION"

"F1: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ONLY WITH SAME TYPE 1.25A, 250V FUSE."

CAUTION

F1: REPLACE WITH SAME TYPE 1.25A, 250V FUSE.

ATTENTION

F1: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 1.25A, 250V FUSE.

A V

•Satellite Speakers Front Panel •Satellite Speakers Rear Panel

YST-MS55D

Lch Rch Lch Rch

YST-MS50/YST-MS55D

YST-MS50 YST-MS55D

•Subwoofer Front Panel

•Subwoofer Rear Panel

YST-MS55D

R model only

U and C models

U and C models only

R modelA modelB and G models

YST-MS50/YST-MS55D YST-MS50 YST-MS55D

Operating Section

Satellite (Auto Power)Switch

Master Volume control

Subwoofer Volume control

Dimensions (W x H x D)

Satellite 97x159x178mm

(3-13/16"x6-1/4"x7-9/16")

Subwoofer 350x210x321mm

(13-25/32"x8-1/4"x12/5/8")

Weight

Satellite 0.7kg (1Ibls. 9 oz.)x2

Subwoofer 8kg (17Ibls. 10oz.)

Finish

YST-MS50

YST-MS50W Computer white color

YST-MS50B Black color

YST-MS55D

YST-MS55DW Computer white color

YST-MS55DB Black color

Accessories

YST-MS50

3.5mm stereo mini plug cable with black color(1.8m) x1

RCA pin plug cable (1.8m) x1

8 pin plug cable (1.8m) x1

8 pcs of nonskid pads x1set

YST-MS55D

3.5mm stereo mini plug cable with black color(1.8m) x1

RCA pin plug color (1.8m) x1

USB cable (2m) x1

8 pcs of nonskid pads x1set

CD-ROM x1

USB Operating Requirements YST-MS55D

:Windows 98-installed PC equipped with USB port.

:CD-ROM drive for device driver installation.

:Intel Pentium processor at least 200 MHz or equivalent.

:At least 10 MB of available hard disk capacity.

* Specifications subject to change without votice.

U ....... U. S. A. model A .......Australian model

C ....... Canadian model B .......British model

R ....... General model G .......European model

Type Active Servo Technology (Advanced Y. S. T)

Output Power

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

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

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

Input Impedance 25 kohms

Frequency Responce 32 Hz to 20 kHz

Crossover Frequency

Satellite Tweeter 12 kHz

Subwoofer fc=200Hz

Headphone Output Level

0.38V/30 ohms (at 200 mV Rated Input)

Speaker Unit

Satellite

Tweeter : 19mm (3/4") balanced dome (JA0262),

Magnetic shielding Type

Midrange : 8cm(3") cone (JA0865),

Magnetic Shielding Type

Subwoofer : 16cm(6-1/2") cone (JA1673),

Magnetic Shielding Type

Input Sction

YST-MS50

Satellite 3.5mm stereo minijack for audio-signal x2

YST-MS55D

Satellite 3.5mm stareo mini jack for audio-signal x2

(USB in use x1)

Subwoofer USB digital x1

Output Sction

YST-MS50

Subwoofer RCA pin jack connected to L ch speaker

8 pin jack connected to R ch speaker

YST-MS55D

Subwoofer RCA pin jack connected to L ch speaker

8 pin jack connected to R ch speaker

3.5mm stereo mini jack for audio-signal x1

(USB in use)

Power Consumption 65W

Power Supply

U, C models AC120V/60Hz

R models AC110/120/220/240V/50/60Hz

A models AC240V/50Hz

B, G models AC230V/50Hz

"Windows 98", are trademarks of Micro Soft Corporation.

YST-MS50/YST-MS55D

YST-MS50 YST-MS55D

•DIMENSIONS

▼Satellite Speaker ▼Subwoofer

97 (3-13/16")

178 (7-9/16")

166(6-17/32")

159 (6-1/4")

210 (8-1/4") 321 (12-5/8")

350 (13-25/32")

■INTERNAL VIEW

•Satellite Speakers

Notes:

The Satellite Speakers are available by the speaker unit (Lch or Rch).

Individual parts of the Satellite Speakers are not available. (See page 31 and 33 of the PARTS LIST for YST-MS50,

page 34 and 36 of the PARTS LIST for YST-MS55D.)

▼L ch ▼R ch

•Satellite Speaker (L ch)

1P. C. B. MAIN (8)

•Satellite Speaker (R ch)

2P. C. B. MAIN (4)

3P. C. B. MAIN (5)

•Subwoofer

8 9 0 A B

5 6 6 7

YST-MS50 YST-MS55D

•Subwoofer

4P. C. B. MAIN (6)

5P. C. B. MAIN (1)

6P. C. B. MAIN (3)

7P. C. B. MAIN (9)

(YST-MS55D only)

8SPEAKER UNIT

(Subwoofer)

9POWER TRANSFORMER

0P. C. B. MAIN (7)

AVOLTAGE SELECTOR (R only)

BP. C. B. MAIN (2)

Units : mm (inch)

YST-MS50/YST-MS55D YST-MS50 YST-MS55D

■DISASSENBLY PROCEDURES

(Remove parts in disassenbly order as numbered.)

•Disassemble of the Subwoofer

1. Removal of the Rear Panel Ass'y.

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

panel ass'y.

b. Disconnect one connector in Fig. 1.

c. Disconnect the Speaker cord in Fig. 1.

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, 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 ( 2) in Fig. 2, and remove the

speaker.

Fig. 2

Fig. 1

Dowels Front Panel Ass'y

Cabinet

Connector

Gaps

Speaker Cord

Rear Panel Ass'y

Speaker

Front Panel Ass'y

YST-MS55D

■USB PORT OPERATION CHECK

The YST-MS55D have a USB port. This USB port operation is checked be necessary whether or not normal state.

1. BEFORE CHECKING THE USB PORT OPERATION

(1) Measuring Instruments

• Personal Computer (Windows 98)

• CD-ROM (Accessories)

• USB Cable (Accessories)

(2) USB Operating requirements

• Windows 98 installed Personal Computer equipped with USB port.

• CD-ROM drive for device driver installation.

• Intel Pentium processor at least 200MHz or equivqlent.

• At least 10MB of abailable hard disk capacity.

(3) Installing the YST-MS55D speaker device drivers

Please follow these steps to install the Yamaha YST-MS55D speaker device drivers in your Windows 98 system

using the included CD-ROM, and verify that Windows 98 recognizes the installed device drivers and that CD audio,

sound generated while using software, and system sounds from the personal computer will be output via the USB port.

1) Start up Windows 98 on your computer. Insert the included YST-MS55D device driver CD-ROM into the CD-

ROM drive

2) Connect the YST-MS55D speakers using the speciﬁed cables and plug them in to the AC outlet. At this time,

do not connect the subwoofer to the personal computer yet.

3) Make sure that the POWER switch on the rear panel of the subwoofer is turned on.

4) Connect the subwoofer to the USB port on the personal computer using the USB cable.

Notes: Before starting, check the above-mentioned “(2) USB Operating requirements” section to see if your PC

supports YST-MS55D. Also, make sure that no other CD-ROM is loaded in the CD-ROM drive and that you quit all

application programs.

Have your Windows 98 CD-ROM ready when you install the Yamaha YST-MS55D speaker device drivers. You may

need it in some cases.

The installation procedure may differ from the following instructions depending on the system environment. Follow the

instructions that appear in the dialog box.

YST-MS50/YST-MS55D

Message “Windows has found a new hardware and is locating the software for it.” appears, then:

The following “Add New Hardware Wizard” appears to install the USB Composite Device. (See Fig. 1)

1. Click [Next].

The system displays the following panel: (See Fig. 2)

The system displays the following panel: (See Fig. 3)

2. Click [Next] again to display the following

panel.

3. Check “CD-ROM drive” and de-select other

options, then click [Next] to proceed to the fol-

lowing panel:

Fig. 1

Fig. 2

Fig. 3

YST-MS50/YST-MS55D YST-MS55D

4. Make sure that “The updated driver (Recom-

mended)” lists “YAMAHA YST-MS55D USB

Composite Device,” then click [Next].

The system displays the following panel: (See Fig. 5)

The system displays the following panel: (See Fig. 4)

Note: Depending on your system, a path other than “D:\USB.INF” may appear.

5. Click [Next].

The system starts installing the YAMAHA YST-

MS55D USB Composite Device. Please wait

awhile.

The system displays the following panel: (See Fig. 6)

6. Click “Finish” to complete the installation of the

USB Composite Device.

Fig. 4

Fig. 5

Fig. 6

YST-MS50/YST-MS55D

YST-MS55D

The system displays a panel to begin installing a Human Interface Device. (See Fig. 7)

The system displays the following panel: (See Fig. 8)

7. Follow the screen instructions. Make sure that

“The updated driver (Recommended)” panel

lists “Human Interface Devices,” and click the

[Next] button repeatedly as in steps 2–5 until the

following panel appears:

8. Click “Finish” to complete the installation of the

Human Interface Device.

The system displays a panel to begin installing a USB Audio Device. (See Fig. 9)

9. Follow the same screen instructions as steps 2–5.

Make sure that “The updated driver (Recom-

mended)” panel lists “YAMAHA YST-MS55D

USB Audio” in step 4, and click the [Next] but-

ton repeatedly until the following panel

appears:

Fig. 7

Fig. 8

Fig. 9

YST-MS50/YST-MS55D YST-MS55D

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