Yamaha HTR-5940 Service Manual

SERVICE MANUAL
100998
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.
■ CONTENTS
TO SERVICE PERSONNEL ...................................... 2–3
FRONT PANELS ........................................................ 3–5
REAR PANELS .......................................................... 5–9
REMOTE CONTROL PANELS .................................... 10
SPECIFICATIONS / 参考仕様 ................................ 11–12
INTERNAL VIEW ......................................................... 13
DISASSEMBLY PROCEDURES/分解手順 ......... 14–15
SELF DIAGNOSIS FUNCTION (DIAG)/
自己診断機能（ダイアグ）........................................ 16–37
AMP ADJUSTMENT/アンプ部調整 ........................... 38
DISPLAY DATA ..................................................... 39–40
IC DATA ................................................................. 41–50
PIN CONNECTION DIAGRAM .............................. 51–52
BLOCK DIAGRAMS .............................................. 53–55
PRINTED CIRCUIT BOARDS................................ 56–68
SCHEMATIC DIAGRAMS ...................................... 69–75
REPLACEMENT PARTS LIST .............................. 77–95
REMOTE CONTROL.............................................. 96–97
ADVANCED SETUP .................................................... 98
REPLACEMENT PARTS LIST FOR CARBON RESISTORS .... 99
P.O.Box 1, Hamamatsu, Japan
AV RECEIVER/AV AMPLIFIER
RX-V459/HTR-5940/DSP-AX459
HTR-5935
RX-V459/HTR-5940/DSP-AX459
HTR-5935
2006 All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
'06.02

Yamaha HTR-5940 Specifications

General

Channels	5.1
Total Harmonic Distortion (THD)	0.06%
Frequency Response	10 Hz - 100 kHz
Input Sensitivity	200 mV
Signal-to-Noise Ratio	100 dB
HDMI Inputs	2
Component Video Inputs	3
Response Bandwidth	10 Hz - 100 kHz
Audio D/A Converter	192 kHz / 24-bit
Built-in Decoders	Dolby Digital, DTS
DSP Presets	17
Tuner Presets	40
Power Output (per channel)	100 W
Input Impedance	47 kΩ
Tuning Range	FM: 87.5 - 108 MHz
Connector Type	RCA

Summary

Important Notices and Warnings

To Service Personnel Guidelines

Essential information and guidelines for authorized service personnel.

Service Personnel Guidelines - Critical Information

Critical Component Handling and Leakage Testing

Information on critical components and the procedure for measuring leakage current.

Chemical Content and Solder Information

Notices regarding chemical content and details on lead-free solder usage.

Front Panel Layouts

Rear Panel Connections

Remote Control Panels

Technical Specifications

Audio, Video, and General Specifications

Detailed specs for audio output, video signals, power consumption, and general unit characteristics.

FM/AM Tuner, Dimensions, and Accessories

Tuner specs, physical dimensions, and included accessories.

Set Menu Configuration Details

Internal Component Layout Diagram

Disassembly Procedures - Initial Steps

Printed Circuit Board Removal and Checks

Self Diagnosis Function (DIAG) Overview

BYPASS Function

DIAG menu item for selecting analog or DSP bypass output.

RAM THROUGH Function

DIAG menu item for RAM margin or full-bit output selection.

PRO LOGIC Function

DIAG menu item for Pro Logic settings.

SPEAKERS SET Function

DIAG menu item for speaker configuration and settings.

XCH-INPUT Function

DIAG menu item for multi-channel input selection.

MIC CHECK Function

DIAG menu item for microphone check (not applied to all models).

DISPLAY CHECK Function

DIAG menu item for checking the FL display section.

MANUAL TEST Function

DIAG menu item for manual testing of audio channels.

FACTORY PRESET Function

DIAG menu item for factory preset initialization or inhibition.

AD DATA CHECK Function

DIAG menu item for checking A/D conversion values and protection status.

VIDEO Function

DIAG menu item related to video functions (not applied to all models).

XM STATUS Function

DIAG menu item for checking XM radio antenna output.

IF STATUS Function

DIAG menu item to display signal processing status information.

DSP BUS CHECK Function

DIAG menu item for checking DSP bus connection integrity.

SWFR CUT OFF Function

DIAG menu item for setting the LFE cutoff frequency.

PROTECTION SETTING Function

DIAG menu item for protection settings (not applied to all models).

PROTECTION HISTORY Function

DIAG menu item to display past protection events.

SOFT SW Function

DIAG menu item for changing software-based function settings.

ROM VER/SUM/PORT Function

DIAG menu item to display firmware versions and checksums.

TI (DSP) BOOT Function

DIAG menu item for TI (DSP) software rewriting mode (not applied to all models).

DIAG Mode Operation Procedures

Starting DIAG Mode

Procedures to start the DIAG mode using front panel keys.

Protection Cancel Mode Operation

Procedure to start DIAG mode with protection functions disabled.

DIAG Mode Display Information

DIAG Menu Navigation and Operation

DIAG Mode Functions and Initial Settings

DIAG Menu Details: 1. BYPASS

DIAG Menu Details: 2. RAM THROUGH

DIAG Menu Details: 3. PRO LOGIC

DIAG Menu Details: 4. SPEAKERS SET

DIAG Menu Details: 5. XCH INPUT

DIAG Menu Details: 6. MIC CHECK

DIAG Menu Details: 7. DISPLAY CHECK

DIAG Menu Details: 8. MANUAL TEST

DIAG Menu Details: 9. FACTORY PRESET

Preset Station Data

DIAG Menu Details: 10. AD DATA CHECK

IMP SW/POWER LIMIT and PANEL KEY Functions

DIAG Menu Details: 11. VIDEO and 12. XM STATUS

DIAG Menu Details: XM/DT Power and iPod Settings

DIAG Menu Details: 16. IF STATUS

DIAG Menu Details: DGI, DSP BUS CHECK, SWFR CUT OFF, Protection

DIAG Menu Details: 21. SOFT SW

SOFT SW Configuration Options

DIAG Menu Details: 22. SOFTWARE VERSION and 23. TI (DSP) BOOT

Amplifier Adjustment Procedures

Idling Current Confirmation

Procedure to measure and confirm idling current voltages on the MAIN (1) PCB.

Display Data Details

Display Component Connections

Diagrams and tables for anode connections and pinouts of display components.

IC Data - Microprocessor

IC2: Microprocessor Pinout and Functions

Detailed pinout and internal peripheral functions of the M30625MHP-A98GP microprocessor.

IC56: Digital Audio Interface Transceiver Pinout

IC60: Decoder/Post Processor Block Diagram

Pin Connection Diagrams

IC Pin Connections

Pin connection diagrams for various integrated circuits used in the unit.

Diodes and Transistors

Block Diagrams - Core Sections

Audio, Operation, Function, and Main Block Diagrams

Block diagrams detailing audio signal paths and core unit sections.

Video Block Diagram

Control and Power Block Diagram

Printed Circuit Board Layouts - DSP

DSP P.C.B. (Side A) Layout

Component layout for the DSP Printed Circuit Board (Side A).

FUNCTION (1) P.C.B. (Side A) Layout

FUNCTION (2) P.C.B. (Side A) Layout

OPERATION (1) P.C.B. (Side A) Layout

OPERATION (2) P.C.B. (Side A) Layout

OPERATION (4) P.C.B. (Side A) Layout

MAIN (1) P.C.B. (Side A) Layout

MAIN (2) P.C.B. (Side A) Layout

YST P.C.B. (Side A) Layout

Schematic Diagrams - DSP Section

DSP Schematic Diagram (1/3)

Schematic diagram for the DSP section, part 1 of 3.

DSP Schematic Diagram (2/3)

DSP Schematic Diagram (3/3)

FUNCTION Schematic Diagram

OPERATION Schematic Diagram

MAIN Schematic Diagram

YST Schematic Diagram

Replacement Parts List - Electrical Components

Electrical Component Parts List

List of electrical components with part numbers, descriptions, and abbreviations.

P.C.B. DSP Replacement Parts

P.C.B. DSP Replacement Parts (Continued)

P.C.B. FUNCTION Replacement Parts

P.C.B. FUNCTION Replacement Parts (Continued)

P.C.B. FUNCTION Replacement Parts (Further)

P.C.B. FUNCTION & OPERATION Replacement Parts

P.C.B. OPERATION Replacement Parts

P.C.B. OPERATION Replacement Parts (Continued)

P.C.B. OPERATION & MAIN Replacement Parts

P.C.B. MAIN Replacement Parts

P.C.B. MAIN Replacement Parts (Continued)

P.C.B. MAIN Replacement Parts (Further)

P.C.B. MAIN & YST Replacement Parts

Overall Assembly Diagram

Overall Assembly Part Number List

List of part numbers for major assemblies like PCBs and panels.

Overall Assembly Part Number List (Continued)

Front Panel Unit Parts List

Amplifier Unit Parts List

Remote Control Details

Remote Control Key Code Mappings

Detailed mapping of remote control buttons to their corresponding functions and codes.

Advanced Setup Procedures

Speaker Impedance and Factory Presets

Features for setting speaker impedance and restoring factory default configurations.

Replacement Parts List for Carbon Resistors