Yamaha RX-V385 Service Manual

P.O.Box 1, Hamamatsu, Japan
SERVICE MANUAL
101407
'18.03
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. Modifi cations 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.
Copyright (c) Yamaha Corporation All rights reserved.
This manual is copyrighted by Yamaha and may not be copied or
redistributed either in print or electronically without permission.
■ CONTENTS
TO SERVICE PERSONNEL ............................................2
FRONT PANELS .............................................................3
REAR PANELS ...............................................................5
REMOTE CONTROL PANEL ........................................ 10
SPECIFICATIONS /
参考仕様
....................................... 11
INTERNAL VIEW .......................................................... 15
SERVICE PRECAUTIONS /
サービス時の注意事項
..... 15
DISASSEMBLY PROCEDURES /
分解手順
................. 16
UPDATING FIRMWARE /
ファームウェアのアップデート
..................................20
SELF-DIAGNOSTIC FUNCTION /
ダイアグ（自己診断機能）
...........................................24
POWER AMPLIFIER ADJUSTMENT /
パワーアンプ調整
.......................................................62
DISPLAY DATA .............................................................63
IC DATA .........................................................................65
BLOCK DIAGRAMS ......................................................79
WIRING DIAGRAMS .....................................................81
PRINTED CIRCUIT BOARDS .......................................84
PIN CONNECTION DIAGRAMS ...................................96
CIRCUIT DIAGRAMS ....................................................97
REPLACEMENT PARTS LIST .................................... 109
REMOTE CONTROL ................................................... 132
RX-V385/HTR-3072
Notes: When the DIGITAL P.C.B. or IC23 on DIGITAL P.C.B. is replaced, this unit will display “Internal Error” and
will not operate properly. The model name, destination and serial number MUST be written to the backup IC
(EEPROM: IC23 on DIGITAL P.C.B.) to have proper operation.
(For detailed procedure, refer to related Service News or Service Bulletin. Or contact your local Yamaha
representative.)
注意： DIGITALP.C.B. または DIGITALP.C.B. の IC23 を交換すると、“InternalError” が表示されて本機が正常に動作し
なくなります。正常に動作させるために、モデル名、仕向け先、シリアル番号をバックアップ IC（EEPROM：
DIGITALP.C.B. の IC23）へ書き込む必要があります。
（詳しい手順は、関連するサービスニュース、または技術報告を参照してください。もしくはヤマハのサービ
スセンターまでご連絡ください。）
AV RECEIVER
RX-V385/HTR-3072

Yamaha RX-V385 Specifications

General

Display	-
HDCP version	2.2
Apple docking	No
Product color	Titanium
Audio decoders	DTS-HD Master Audio, Dolby Digital Plus, Dolby TrueHD
Volume control	Rotary
Bluetooth range	10 m
DSP programs quantity	17
Digital Signal Processing (DSP)	Yes
Receiver type	Surround
Audio output channels	5.1 channels
Dynamic power per channel (2 Ohm)	150 W
Dynamic power per channel (4 Ohm)	130 W
Dynamic power per channel (6 Ohm)	110 W
Power output per channel (1KHz@6 Ohm)	100 W
Power output per channel (20-20KHz@8 Ohm)	- W
Audio formats supported	AAC, MP3, WAV, WMA
Video formats supported	MPEG4
Supported video modes	2160p
Number of HDMI outputs	1
HDMI in	4
Composite video in	3
Digital audio coaxial in	2
Bluetooth version	2.1+EDR
Bluetooth profiles	A2DP
Supported radio bands	AM, FM
Speakers connectivity type	Clamp terminals

Weight and Dimensions

Depth	315 mm
Width	435 mm
Height	161 mm
Weight	7700 g

Summary

Important Notice

To Service Personnel

Critical Components Information

Details on replacing components with identical specifications for safety and performance.

Leakage Current Measurement

Procedure for verifying insulation and measuring leakage current on 120V models.

About Lead-Free Solder

Front Panels

Rear Panels

Remote Control Panel

Specifications

Audio Section Specifications

Covers rated power, dynamic power, damping factor, input sensitivity, and frequency response.

Video Section Specifications

Details video signal types, levels, noise ratio, and monitor output frequency response.

FM Section Specifications

Covers FM tuning range, sensitivity, signal-to-noise ratio, and harmonic distortion.

AM Section

AM Tuning Range and Antenna

Specifies the AM tuning frequency range and antenna type.

General Specifications

Power Supply, Consumption, Dimensions, and Finish

Details power supply voltage, consumption, physical dimensions, and available finishes.

Accessories

Internal View

Service Precautions

Safety Measures for Servicing

Covers handling high voltages and discharging capacitors before repair work.

Disassembly Procedures

Top Cover Removal

Steps for removing the top cover, including screw and hook details.

Front Panel Unit Removal

Steps for removing the front panel unit, including screws and hooks.

Bluetooth Module Removal

Steps for removing the Bluetooth module and reusing its label.

Disassembly Procedures (Continued)

Digital P.C.B. Removal

Steps for removing the DIGITAL P.C.B., including connectors.

AMP Unit Removal

Steps for removing the AMP unit, including screws and connectors.

Checking DIGITAL P.C.B.

Checking MAIN (1) P.C.B.

Updating Firmware

Firmware Version and Checksum Confirmation

Summarizes checking firmware version and checksum using the self-diagnostic function.

Back-up IC Initialization

Summarizes initializing the backup IC (EEPROM) after firmware update.

Required Tools and Preparation

Covers necessary tools and steps for preparing the firmware on a USB device.

Updating Firmware (Continued)

Firmware Update Operation Procedures

Details the steps for performing the firmware update via USB.

List of Error Messages

Self-Diagnostic Function

Self-Diagnostic Function Operation

Starting Self-Diagnostic Function

Procedure to activate the self-diagnostic mode by pressing specific keys.

Starting Self-Diagnostic Function with Protection Cancelled

Procedure to start diagnostics with protection functions disabled.

Self-Diagnostic Function Operation (Continued)

Canceling Self-Diagnostic Function

Procedure to exit the diagnostic mode, including memory preservation settings.

Display Indications When Self-Diagnostic Function Starts

Describes display messages upon starting or exiting diagnostics based on power state.

Protection Function Information

Protection Function Activated

Explains what happens when protection activates and its display messages.

Protection History Due to Excess Current

Details history logging for excess current protection and its causes.

Protection Function Information (Continued)

Protection Due to Abnormal DC Output

Explains protection triggered by abnormal DC output at speaker terminals.

Protection Due to Abnormal Power Supply Voltage

Explains protection triggered by abnormal voltage in the power supply section.

Protection Function Information (Continued)

Protection Due to Excessive Temperature

Explains protection triggered by excessive heatsink or bridge diode temperature.

Protection Due to Excessive USB Power Voltage

Explains protection triggered by abnormal USB power supply voltage.

Protection Due to Speaker Terminal Short

Explains protection triggered by speaker terminal shorts.

Protection Function History

Self-Diagnostic Function Details

Main and Sub-menu Operation

Explains how to navigate the main and sub-menus of the diagnostic function.

Functions Available in Diagnostic Mode

Lists functions like power control, volume, muting, and input selection usable during diagnostics.

Initial Settings When Diagnostic Function Starts

Describes the default settings for master volume, input, and menu state during diagnostics.

Self-Diagnostic Function Menu Details

A1. DSP AUDIO

Checks audio signal route via DSP, including DSP THROUGH and INVALID ITEM.

Self-Diagnostic Function Menu Details (Continued)

A2. CH AUDIO

Checks audio signal route in DIRECT mode for VH and VL settings.

Self-Diagnostic Function Menu Details (Continued)

A2. CH AUDIO (Continued)

Checks audio signal route for Center, Surround, and Subwoofer channels.

Self-Diagnostic Function Menu Details (Continued)

A3. HDMI AUDIO

Checks audio signal route for HDMI IN/OUT, ARC, and eARC connections.

Self-Diagnostic Function Menu Details (Continued)

A4. AUDIO ROUTE CHECK

Checks speaker output routes, BI-AMP, and FULL MUTE functions.

A5. IMPEDANCE TEST

Indicates that this item is not used for service.

Self-Diagnostic Function Menu Details (Continued)

A6. MIC CHECK

Checks audio signal input to the YPAO MIC jack.

A7. DIR PLL LOCK CHECK

Checks the route of digital audio signal input to various jacks.

Self-Diagnostic Function Menu Details (Continued)

A8. MANUAL TEST

Outputs test noise generated by the built-in noise generator.

A9. AUDIO LOOPBACK TEST

Indicates that this item is not used for service.

Self-Diagnostic Function Menu Details (Continued)

D1. FL CHECK

Checks the operation of the FL display, including segment conditions and shorts.

Self-Diagnostic Function Menu Details (Continued)

U1. USB

Checks the audio signal route from the USB storage device.

U2. USB COMPLIANCE TEST

Indicates that this item is not used for service.

N1. INVALID ITEM

Indicates that this item is not used for service.

N2. INVALID ITEM

Indicates that this item is not used for service.

Self-Diagnostic Function Menu Details (Continued)

N3. BLUETOOTH

Displays Bluetooth information such as version, address, and line status.

Self-Diagnostic Function Menu Details (Continued)

C1. ACCESS CHECK

Checks communication and bus line connections on the DIGITAL P.C.B.

Self-Diagnostic Function Menu Details (Continued)

C1. ACCESS CHECK (Continued)

Checks I2C, DIR BUS, and DSP BUS connections for communication.

Self-Diagnostic Function Menu Details (Continued)

C1. ACCESS CHECK (Continued)

Checks EEPROM reading, CEC, and Bluetooth module communication.

Self-Diagnostic Function Menu Details (Continued)

C2. INVALID ITEM

Indicates that this item is not used for service.

C3. INVALID ITEM

Indicates that this item is not used for service.

V1. ANALOG VIDEO CHECK

Checks the analog video signal route.

Self-Diagnostic Function Menu Details (Continued)

V1. ANALOG VIDEO CHECK (Continued)

Checks the mute status of the video signal.

Self-Diagnostic Function Menu Details (Continued)

V2. DIGITAL VIDEO CHECK

Checks the digital video signal route, including HDMI repeat and OSD output.

Self-Diagnostic Function Menu Details (Continued)

R1. INVALID ITEM

Indicates that this item is not used for service.

V2. DIGITAL VIDEO CHECK (Continued)

Description of invalid items for digital video check.

T1. TROUBLESHOOTING INFORMATION

Displays operating time and frequency of the unit.

Troubleshooting Information

T1. Troubleshooting Information Details

Covers power amp B, output level, power off time-out, microprocessor operation, reset, and protection lock.

Troubleshooting Information (Continued)

T2. USAGE ENVIRONMENT

Displays main zone volume and temperature readings.

T2-5. EEPROM ERROR

Reports errors occurring in EEPROM backup contents.

External Event Information

T3. EXTERNAL EVENT History

Displays the history of key operations performed on the unit.

Protection Detection Information

T4. PROTECTION DETECTION History

Displays the history of protection function activations.

AD Data Check

P1. AD Data Check Menu

Displays AD conversion values for panel keys and protection functions.

AD Data Check (Continued)

P1. AD Data Check (Continued)

Covers THM temperature, Output Level, Limiter Control, and USB voltage checks.

AD Data Check (Continued)

P1. AD Data Check (Continued)

Covers invalid items and panel key detection data.

Protection History

P2. Protection History

Displays the history of protection function activations and allows clearing.

Miscellaneous Invalid Items

E1. INVALID ITEM

Indicates that this item is not used for service.

S1. INVALID ITEM

Indicates that this item is not used for service.

System and Version Information

S2. SET INFORMATION

Displays model name, destination, and serial number.

S3. FACTORY PRESET

Manages backup IC initialization, allowing reservation or inhibition.

System and Version Information (Continued)

S4. ROM VERSION/CHECKSUM

Displays firmware version and checksums for microprocessor, flash ROM, and DSP.

Power Amplifier Adjustment

Power Amplifier Adjustment Procedures

Details voltage adjustment steps for power amplifier output across terminals.

Display Data

Pin Connection Details

Provides pin assignments for various ICs and connectors.

Grid Assignment Details

Defines grid assignments for segments on the display panel.

IC Data

IC1: MN864788A (DIGITAL P.C.B.)

Describes the MN864788A IC, functioning as HDMI port processors.

IC Data (Continued)

IC41: D80YK113DPTP400 (DIGITAL P.C.B.)

Describes the D80YK113DPTP400 IC, functioning as a decoder/post processor.

IC Data (Continued)

IC22: TMPM462F15FG (DIGITAL P.C.B.)

Describes the TMPM462F15FG IC, functioning as a microprocessor.

Block Diagrams

DIGITAL Section Block Diagram

Visual representation of the digital section's components and connections.

Power Supply Section Block Diagram

Visual representation of the power supply section's components and connections.

Wiring Diagrams

Overall Assembly Wiring

Illustrates the wiring connections for the overall assembly of the unit.

Printed Circuit Boards

DIGITAL (Side A) PCB Layout

Shows the component layout for the DIGITAL PCB (Side A).

Printed Circuit Boards (Continued)

DIGITAL (Side B) PCB Layout

Shows the component layout for the DIGITAL PCB (Side B).

Printed Circuit Boards (Continued)

OPERATION (1) (Side A) PCB Layout

Shows the component layout for the OPERATION (1) PCB (Side A).

Printed Circuit Boards (Continued)

OPERATION (5) (Side A) PCB Layout

Shows the component layout for the OPERATION (5) PCB (Side A).

OPERATION (13) (Side A) PCB Layout

Shows the component layout for the OPERATION (13) PCB (Side A).

Printed Circuit Boards (Continued)

OPERATION (1) (Side B) PCB Layout

Shows the component layout for the OPERATION (1) PCB (Side B).

Printed Circuit Boards (Continued)

MAIN (1) (Side A) PCB Layout

Shows the component layout for the MAIN (1) PCB (Side A).

Printed Circuit Boards (Continued)

MAIN (1) (Side B) PCB Layout

Shows the component layout for the MAIN (1) PCB (Side B).

Printed Circuit Boards (Continued)

MAIN (2) (Side A) PCB Layout

Shows the component layout for the MAIN (2) PCB (Side A).

MAIN (3) (Side A) PCB Layout

Shows the component layout for the MAIN (3) PCB (Side A).

Printed Circuit Boards (Continued)

MAIN (2) (Side B) PCB Layout

Shows the component layout for the MAIN (2) PCB (Side B).

MAIN (3) (Side B) PCB Layout

Shows the component layout for the MAIN (3) PCB (Side B).

Pin Connection Diagrams

IC Pin Connections

Diagrams showing pin assignments for various ICs.

Diode and Transistor Pin Connections

Diagrams showing pin assignments for diodes and transistors.

Circuit Diagrams

DIGITAL Section (1/6)

Circuit diagram for the DIGITAL section, covering HDMI and ARC.

Circuit Diagrams (Continued)

DIGITAL Section (2/6)

Circuit diagram for the DIGITAL section, detailing microprocessor and protection signals.

Circuit Diagrams (Continued)

DIGITAL Section (3/6)

Circuit diagram for the DIGITAL section, detailing DSP and audio DAC connections.

Circuit Diagrams (Continued)

DIGITAL Section (4/6)

Circuit diagram for the DIGITAL section, showing DACs and Bluetooth/USB interfaces.

Circuit Diagrams (Continued)

DIGITAL Section (5/6)

Circuit diagram showing power supply distribution for various digital components.

Circuit Diagrams (Continued)

DIGITAL Section (6/6)

Circuit diagram detailing USB and Bluetooth module connections.

Circuit Diagrams (Continued)

OPERATION Section (1/2)

Circuit diagram for the operation section, showing power and remote control circuits.

Circuit Diagrams (Continued)

OPERATION Section (2/2)

Circuit diagram for the operation section, detailing power supply and analog circuits.

Circuit Diagrams (Continued)

MAIN Section (1/3)

Circuit diagram for the main section, showing analog input and speaker output stages.

Circuit Diagrams (Continued)

MAIN Section (2/3)

Circuit diagram for the main section, detailing power supply and protection circuits.

Circuit Diagrams (Continued)

MAIN Section (3/3)

Circuit diagram for the main section, showing various analog and digital interfaces.

Replacement Parts List

DIGITAL Section Parts

List of replacement parts for the DIGITAL section, including capacitors and connectors.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including capacitors and connectors.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including capacitors and diodes.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including capacitors, diodes, and ICs.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including ICs and resistors.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including resistors.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including resistors.

Replacement Parts List (Continued)

DIGITAL Section Parts (Continued)

List of replacement parts for the DIGITAL section, including resistors.

Replacement Parts List (Continued)

OPERATION Section Parts

List of replacement parts for the OPERATION section, including connectors, capacitors, and diodes.

Replacement Parts List (Continued)

OPERATION Section Parts (Continued)

List of replacement parts for the OPERATION section, including diodes and fuses.

Replacement Parts List (Continued)

OPERATION Section Parts (Continued)

List of replacement parts for the OPERATION section, including transistors and resistors.

Replacement Parts List (Continued)

OPERATION Section Parts (Continued)

List of replacement parts for the OPERATION section, including resistors.

Replacement Parts List (Continued)

MAIN Section Parts

List of replacement parts for the MAIN section, including transistors and connectors.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including capacitors and diodes.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including transistors and ICs.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including transistors and resistors.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including transistors and resistors.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including resistors.

Replacement Parts List (Continued)

MAIN Section Parts (Continued)

List of replacement parts for the MAIN section, including transistors and connectors.

Overall Assembly

Remote Control

Remote Control Circuit Diagram and Panel Layout

Diagrams showing the circuit and component layout of the remote control.

Remote Control (Continued)

Key Layout and Key Codes

Describes the remote control's button layout and corresponding key codes.