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Yamaha YST-MS201 Service Manual
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Yamaha YST-MS201 Service Manual

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POWERED MULTIMEDIA SPEAKERS
YST-MS201
L
FROM
SUBWOOFER
POWERED MULTIMEDIA SPEAKERS
YST-MS201
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 or 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.
CONTENTS
TO SERVICE PERSONNEL .......................................... 1
SPECIFICATIONS .......................................................... 1
REAR PANELS .............................................................. 2
DISASSEMBLY PROCEDURES ................................... 3
PRINTED CIRCUIT BOARD .......................................... 4
1 0 0 7 2 5
SERVICE MANUAL
IMPORTANT NOTICE
IC BLOCK DIAGRAM .................................................... 5
SCHEMATIC DIAGRAM ................................................ 6
PARTS LIST ............................................................. 7~11
YST-MS201
R
FROM
SUBWOOFER
VOLUME
P.O.Box 1, Hamamatsu, Japan

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Summary of Contents for Yamaha YST-MS201

  • Page 1: Table Of Contents

    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.

  • Page 2: To Service Personnel

    YST-MS201 TO SERVICE PERSONNEL 1. Critical Components Information Components having special characteristics are marked s and must be replaced with parts having specifications equal AC LEAKAGE to those originally installed. WALL EQUIPMENT TESTER OR 2. Leakage Current Measurement (For 120V Models Only)

  • Page 3: Rear Panels

    YST-MS201 Dimensions POWERED MULTIMEDIA SPEAKERS YST-MS201 VOLUME 128 (5-1/16") 60 (2-3/8") 60 (2-3/8") 145 (5-11/16") 70 (2-3/4") 193 (7-5/8") 70 (2-3/4") 214 (8-7/16") REAR PANELS (Subwoofer) U, C models A model B, G models J model...

  • Page 4: Disassembly Procedures

    YST-MS201 DISASSEMBLY PROCEDURES (Subwoofer) (Remove parts in disassembly order as numbered.) 1. Removal of Rear Panel Ass'y Remove 8 screws (1) and then remove the Rear Panel Ass'y. 2. Removal of Front Grille Ass'y a. Insert the tip of flat tip (-) screwdriver to slot located at bottom side of the Front Grille Ass'y.

  • Page 5: Ic Block Diagram

    YST-MS201 PRINTED CIRCUIT BOARD (Parts side) IC BLOCK DIAGRAM PC4570HA TDA7370BV Dual OP-Amp. Quad Power Amp. OUT1 – Subwoofer INPUT1 A2 INV. STAND-BY OUT2 – INPUT2 OUT3 – INPUT3 A4 INV. OUT4 – CLIP DET INPUT4 PW-GND S-GND NJM78L06A Regulator...

  • Page 6: Schematic Diagram

    YST-MS201 SCHEMATIC DIAGRAM All voltage are measured with a 10M /V DC electric volt meter. Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. Schematic diagram is subject to...

  • Page 7: Parts List

    WARNING YST-MS201 PARTS LIST Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally in- stalled. ELECTRICAL PARTS Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS List. For the parts No. of the carbon resistors, refer to last page.
  • Page 8 YST-MS201 ELECTRICAL PARTS New Parts...
  • Page 9 YST-MS201 New Parts...
  • Page 10 YST-MS201 EXPLODED VIEW 9-10 9-10...
  • Page 11 YST-MS201 MECHANICAL PARTS New Parts...

  • Page 12: Parts List For Carbon Resistors

    YST-MS201 Parts List for Carbon Resistors Value 1/4W Type Part No. 1/6W Type Part No. Value 1/4W Type Part No. 1/6W Type Part No. 3100 3100 10 k 7100 7100 HJ35 HF85 HF45 HF45 3180 11 k 7110 7110 HJ35...