• When accepting a repair order from the user, it is recommended to receive BD-940 and R-840 as a set for the repair
work.
• The MCR-940 consists of the R-840, BD-940 and NS-BP300.
This service manual is for the BD-940. For service manual of the R-840/NS-BP300, please refer to the following
publication number:
R-840/NS-BP300: 101153
• When BD module P.C.B. of this unit is replaced, the serial number and new MAC address MUST be reported to Yamaha
Corporation by e-mail.
E-mail: ycav-keycontrol@gmx.yamaha.com
For more information, refer to “SERVICE PRECAUTIONS”.
BD-940
Copyright © 2009 All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
101154
SERVICE MANUAL
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 specifi cally 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 specifi ed. 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 fi rm does not constitute authorization, certifi cation 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
specifi cations are subject to change without notice or obligation to retrofi t. 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.
■ CONTENTS
TO SERVICE PERSONNEL ........................................2–3
PREVENTION OF ELECTROSTATIC DISCHARGE ......4
REGION MANAGEMENT INFORMATION .....................5
SYSTEM COMPOSITION ................................................6
FRONT PANEL ...............................................................7
REAR PANELS ...............................................................8
REMOTE CONTROL PANEL ..........................................9
SPECIFICATIONS ................................................... 10–12
INTERNAL VIEW .......................................................... 13
SERVICE PRECAUTIONS ...................................... 14–17
DISASSEMBLY PROCEDURES ............................. 18–21
UPDATING FIRMWARE ..........................................22–26
SELF-DIAGNOSTIC FUNCTION ............................27–31
DISPLAY DATA .............................................................32
IC DATA ...................................................................33–35
PIN CONNECTION DIAGRAMS .............................36–37
BLOCK DIAGRAM ........................................................39
PRINTED CIRCUIT BOARDS .................................40–44
SCHEMATIC DIAGRAMS .......................................45–48
REPLACEMENT PARTS LIST ................................49–53
REMOTE CONTROL .....................................................54
SYSTEM CONNECTOR ..........................................55–56
SETTINGS ...............................................................57–59
'09.11
P.O.Box 1, Hamamatsu, Japan
BLU-RAY DISC PLAYER
BD-940
MICRO COMPONENT SYSTEM
MCR-940
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