Yamaha RX-V1070, Service Manual

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STEREO RECEIVER
RX-V1070/V870/V850
F 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 inherant 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 all 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 reserch,
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 parts replacement. Recheck all work before you
apply power to the unit. i
• CONTENTS ——————
TO SERVICE PERSONNEL........................................... 1
FRONT PANELS ............................................................1
REARPANELS...............................................................2
SPECIFICATIONS ...................................................... 3-4
BLOCK DIAGRAM .....................................................5-7
INTERNAL VIEW............................................................8
DISASSEMBLY PROCEDURES ................................8-9
PROTECTION FUNCTION........................................... 10
ADJUSTMENT IN POWER AMPLIFIER SECTION ....10
ADJUSTMENT IN TUNER SECTION ....................11-14
DIAGNOSTIC OPERATION ...................................15-16
ICDATA..................................................................17-20
DISPLAY DATA............................................................21
PRINTED CIRCUIT BOARD ..................................22-41
WAVEFORM OF TEST POINT..............................42-43
SCHEMATIC DIAGRAM .........................................44-48
PARTS LIST...........................................................49-78
REMOTE CONTROL TRANSMITTER ...................79-80