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HOME THEATER SYSTEM
AV-S70/NX-SW70
SERVICE MANUAL
NX-SW70 is composed of SW-AVS70 and NX-AVS70s.
SUBWOOFER
(SW-AVS70)
REAR SPEAKER REAR SPEAKER
(NX-AVS70) (NX-AVS70)
FRONT SPEAKER (AV-S70)
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.
AV-S70/NX-SW70
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.
s CONTENTS
TO SERVICE PERSONNEL ......................................... 1 SW-AVS70 BLOCK DIAGRAM .................................. 23
FRONT/REAR PANELS .......................................... 1--2 AV-S70 PRINTED CIRCUIT BOARD ................. 24--33
SPECIFICATIONS ......................................................... 3 SW-AVS70 PRINTED CIRCUIT BOARD ........... 34--35
DISASSEMBLY PROCEDURES .................................. 4 AV-S70 SCHEMATIC DIAGRAM ....................... 36--39
TEST PROGRAM MODE ........................................ 5--6 SW-AVS70 SCHEMATIC DIAGRAM .......................... 40
DSP DIAG MODE ................................................. 7--13 PARTS LIST ........................................................ 41--54
AV-S70 IC DATA ................................................ 14--20 REMOTE CONTROL TRANSMITTER ........................ 55
AV-S70 BLOCK DIAGRAM ................................ 21--22
100697
AV-S70/NX-SW70
s TO SERVICE PERSONNEL
AC LEAKAGE
Critical Components Information. WALL EQUIPMENT TESTER OR
Components having special characteristics are marked Z OUTLET UNDER TEST EQUIVALENT
and must be replaced with parts having specifications equal
to those originally installed.
INSULATING
TABLE
s FRONT/REAR PANELS
w AV-S70
AV-S70/NX-SW70
(1