Yamaha AV-S70 Service Manual

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SERVICE  MANUAL

AV-S70/NX-SW70

AV-S70/NX-SW70

HOME THEATER SYSTEM

NX-SW70 is composed of SW-AVS70 and NX-AVS70s.

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CONTENTS

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

FRONT/REAR PANELS .......................................... 1—2

SPECIFICATIONS ......................................................... 3

DISASSEMBLY PROCEDURES .................................. 4

TEST PROGRAM MODE ........................................ 5—6

DSP DIAG MODE ................................................. 7—13

AV-S70 IC DATA ................................................ 14—20

AV-S70 BLOCK DIAGRAM ................................ 21—22

SW-AVS70 BLOCK DIAGRAM .................................. 23

AV-S70 PRINTED CIRCUIT BOARD ................. 24—33

SW-AVS70 PRINTED CIRCUIT BOARD ........... 34—35

AV-S70 SCHEMATIC DIAGRAM ....................... 36—39

SW-AVS70 SCHEMATIC DIAGRAM .......................... 40

PARTS LIST ........................................................ 41—54

REMOTE CONTROL TRANSMITTER ........................ 55

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 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.

FRONT SPEAKER (AV-S70)

SUBWOOFER

(SW-AVS70)

REAR SPEAKER

(NX-AVS70)

REAR SPEAKER

(NX-AVS70)