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Yamaha YST-RSW300 Service Manual

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3 7 63 1515 0
YST-RSW300
TE
L 13942296513
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.
I CONTENTS
TO SERVICE PERSONNEL .......................................... 2
REAR PANELS .......................................................... 3-4
SPECIFICATIONS ...................................................... 4-5
DISASSEMBLY PROCEDURES ............................... 6-7
CHECKS AND ADJUSTMENTS ................................ 8-9
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IMPORTANT NOTICE
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This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
http://www.xiaoyu163.com
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SUBWOOFER SYSTEM

SERVICE MANUAL
Status indicator
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BLOCK DIAGRAM ....................................................... 10
PRINTED CIRCUIT BOARDS ................................ 11-12
SCHEMATIC DIAGRAM .............................................. 13
REPLACEMENT PARTS LIST .............................. 15-19
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All rights reserved.
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P.O.Box 1, Hamamatsu, Japan
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Summary of Contents for Yamaha YST-RSW300

  • 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-RSW300 3 7 63 1515 0 I TO SERVICE PERSONNEL AC LEAKAGE WALL EQUIPMENT TESTER OR 1. Critical Components Information OUTLET UNDER TEST EQUIVALENT Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed.
  • Page 3 YST-RSW300 3 7 63 1515 0 I REAR PANELS U, C models R model K model A model L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 4: Rear Panels

    B, G models L model I SPECIFICATIONS L 13942296513 Type ..Advanced Yamaha Active Servo Technology II Power Supply U, C models ........AC 120 V, 60 Hz Output Power (100 Hz, 5 ohms, 10% T.H.D.) ..250 W R, L models ..AC 110/120/220/230-240 V, 50/60 Hz Dynamic Power (5 ohms) ........

  • Page 5: Internal View

    372 (14-5/8") 428.2 (16-7/8") Unit: mm (inch) Advanced YST II Advanced Yamaha Active Servo Technology II is a unique system to let the speaker unit have a perfectly linear motion by the speaker and amplifier combination. L 13942296513 I INTERNAL VIEW MAIN (8) P.C.B.

  • Page 6: Disassembly Procedures

    YST-RSW300 3 7 63 1515 0 I DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet. Spread a rubber sheet and cloth, then place the main unit upside down on it.
  • Page 7 YST-RSW300 3 7 6 3 1 5 1 5 0 3. Removal of Rear Panel Ass'y Front panel a. Remove 8 screws (2). (Fig. 2) d. Remove 2 screws (3). (Fig. 2) Knob hole * Screws (2) are identified with arrow marks ( ).
  • Page 8 YST-RSW300 3 7 6 3 1 5 1 5 0 I CHECKS AND ADJUSTMENTS G Confirmation of power amplifier operation G Idling adjustment For the power amplifier which has been repaired, it is absolutely necessary to confirm that a correct waveform is obtained To stabilize operation of the amplifier, turn ON the power with no input signal and wait for 2 to 3 minutes in non loaded at points indicated by A and B in the schematic diagram according to the following procedure.
  • Page 9 YST-RSW300 3 7 6 3 1 5 1 5 0 G Confirmation of AUTO STANDBY operation setting 1) Turn off the “POWER ON/OFF” key located on the rear panel. 2) In order to shorten the time required for operation check; connect a 10 k-ohms resistor at both ends of R45 on the MAIN (2) P.C.B..

  • Page 10: Block Diagram

    YST-RSW300 3 7 6 3 1 5 1 5 0 I BLOCK DIAGRAM PHASE VOLUME IC11A SELECT POWER DRIVE PRE DRIVE DRIVER IC11B IC10A NORM Q3-15 Q17A, Q17C PS AMP Q22C, Q24A IC7A – WOOFER IC7B – INPUT 1 –...

  • Page 11: Printed Circuit Boards

    YST-RSW300 3 7 6 3 1 5 1 5 0 I PRINTED CIRCUIT BOARDS MAIN (3) P.C.B. MAIN (10) P.C.B. MAIN (4) MAIN (2) (CB4) (W1) IC10 IC10 Ref no. Location W6A1 W6A2 COM OUT W6A3 MAIN (6) (W6B1, W6B2, W6B3)
  • Page 12 YST-RSW300 3 7 6 3 1 5 1 5 0 MAIN (2) P.C.B. MAIN (4) P.C.B. MAIN (5) P.C.B. R, L models MAIN (10) (CB9) POWER • Semiconductor Location ON/OFF Ref no. Location Ref no. Location IC202 D201 W12B...

  • Page 13: Schematic Diagram

    YST-RSW300 SCHEMATIC DIAGRAM MAIN MAIN (3) MAIN (1) IC1: NJM79M12FA Voltage regulator 67.6 COMMON 11.9 67.6 OUTPUT/ IC11 INPUT 1 67.0 67.0 OUTPUT -11.9 66.9 66.4 POWER IC10 67.6 66.4 DRIVE 67.3 67.3 67.3 PHASE MAIN (10) INPUT 67.6 11.9...

  • Page 14: Replacement Parts List

    YST-RSW300 3 7 63 1515 0 I REPLACEMENT PARTS LIST • ELECTRICAL COMPONENT PARTS WARNING G Components having special characteristics are marked s and must be replaced with parts having specifications equal to those originally installed. G The chip resistor is not supplied as a replacement part.
  • Page 15 YST-RSW300 3 7 63 1515 0 P.C.B. MAIN Ref. No. Part No. Description Markets Ref. No. Part No. Description Markets WK224400 P.C.B. MAIN FG644100 C.CE 0.01uF WK224500 P.C.B. MAIN UA653680 C.MYLAR 6800pF 50V J WK224600 P.C.B. MAIN KABG UA653220 C.MYLAR...
  • Page 16 YST-RSW300 3 7 6 3 1 5 1 5 0 P.C.B. MAIN Carbon Resistors Ref. No. Part No. Description Markets Ref. No. Part No. Description Markets Value 1/4W Type Part No. 1/6W Type Part No. Value 1/4W Type Part No. 1/6W Type Part No.
  • Page 17 YST-RSW300 3 7 6 3 1 5 1 5 0 • OVERALL ASS’Y 5 (3) 4-32 4-35 4-22 5 (10) 5 (8) 4-35 5 (4) 4-37 4-38 5 (1) 4-32 4-33 4-29 4-34 4-31 4-35 4-33 4-32 4-23 4-32...
  • Page 18 YST-RSW300 3 7 6 3 1 5 1 5 0 Ref. No. Part No. Description Remarks Markets Ref. No. Part No. Description Remarks Markets WK217100 CABINET ASS'Y WC736000 BUSH WK217000 CABINET ASS'Y WG405400 BIND HEAD TAPPING SCREW 4x35 MFZN2B3...
  • Page 19 3 7 6 3 1 5 1 5 0 YST-RSW300 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...

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