Yamaha dsp a1000

Page 1

DIGITAL SOUND FIELD PROCESSING

AMPLIFIER

, DSP-A1000

SERVICE MANUAL

WW mm mmmmw mm

I CONTENTS

TO SERVICE PERSONNEL
REAR PANELS .
SPECIFICATIONS .
BLOCK DIAGRAM
INTERNAL VIEW .......................
DISASSEMBLY PROCEDURES
ADJUSTMENTS.
TEST SIGNAL PROGRAM

This manual has been pnovided for the use or authoxizcd YAMAHA Retailers and their service petsonneL
It has been assumed that basic sewice pxoecdunes inherant w the indush'y, and more specifically YAMAHA
Products, are already known and undustuod by the usets. and have therefore not been restated.

WARNING: Failure to follow ippmpriate service and safety pxowduxcs when servicing this product
may result in petsonal injury, destnwdon of expensive mements and failule 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 Retailcx or Ihe
appointed service representative.

IMPORTANT: The pxesemation or sale of this manual to any individual or Eum does not constitute
anthofization, certification in recognition of my applicable technical capabilities. or
establish a pnnciplrzagmt relationship of any form.

The data pmvided is believed to be aocunto and applicable to the nnifis) indicated on the cover. The resctch,

engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products.

Modifications ate, therefore, itwvitable and specifications are subject to change without notice or obligation to

rctmflt. Should my 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 gmund buss in the unit (heavy
gauge black wires connect to this buss).

IMPORTANT: Tum the unit OFF dun'ng disassembly and pans replacement. Recheck all walk before you

k apply power to the unit. /

IMPORTANT NOTICE \

PROTECTION FUNCTION
PRINTED CIRCUIT BOARD
IC DATA
SCHEMATIC DIAGRAM
INTERCONNECT WIRING DIAGRAM ..
LCD UNIT DATA .
PARTS LIST
REMOTE CONTROL TRANSMITTE

YAMAHA

YAMAHA CORPORATION
PO. Box 1, Hamamatsu, Japan

0.29K~126|fll©ltinted in Japan 91.1

000 I-VdSG

Page 2

DS P-A1 000

DSP-A 1 000

I TO SERVICE PERSONNEL

1.

Critical Components information.

Components having special characteristics are marked and
must be replaced with parts having specifications equal to
those originally installed. .

. Leakage Current Measurement (For 120V Models Only).

When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.

Meter impedance should be equivalent to 1500 ohm shunted
by 0.15m?

Leakage current must not exceed 0.5mA.

Be sure to test for leakage with the AC plug in both
polarities.

AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
INSULATING =
TABLE

POLARIZATION (U, 0 models)

This amplifier product is equipped with a polarized alternat»
ing-current line plug (a plug having one blade wider than the
other). This plug will fit into the power outlet only one way.
This is a safety feature.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic
and/or plastic (where applicable) components may also contain traces of chemicals found by the
California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects
or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR
MOUTH FOR ANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale sol-
der fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash
your hands before handling food.

I REAR PANELS

V USA & Canadian models