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Yamaha RX-V671 AV RECEIVER Service Manual
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101214
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 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
FRONT PANELS ......................................................... 3–4
REAR PANELS ........................................................... 5–8
REMOTE CONTROL PANELS ....................................... 9
SPECIFICATIONS ................................................... 10–15
INTERNAL VIEW .......................................................... 16
SERVICE PRECAUTIONS ............................................ 17
DISASSEMBLY PROCEDURES ............................. 18–23
UPDATING FIRMWARE .......................................... 24–25
SELF-DIAGNOSTIC FUNCTION ............................ 26–67
CONFIRMATION OF
IDLING CURRENT OF AMP UNIT .................... 68
DISPLAY DATA ....................................................... 69–70
IC DATA ................................................................... 71–83
PIN CONNECTION DIAGRAMS ............................. 84–86
BLOCK DIAGRAMS ................................................ 87–91
PRINTED CIRCUIT BOARDS ............................... 92–125
SCHEMATIC DIAGRAMS ................................... 127–146
REPLACEMENT PARTS LIST ............................ 147–167
REMOTE CONTROL ........................................... 168–170
ADVANCED SETUP ............................................ 171–172
AV RECEIVER
'11.06
P.O.Box 1, Hamamatsu, Japan
RX-V671/HTR-6064/
RX-A710
RX-V671/HTR-6064/
RX-A710
Note: When the DIGITAL P.C.B. or IC83 on DIGITAL P.C.B. is replaced, the network function of this unit will not operate
properly without additional setting.
In such a case, report the serial number of this unit to the following e-mail address.
Yamaha Corporation will reply providing the setting procedure to make the network function of this unit operate
properly.
E-mail: ycav-ysiss@gmx.yamaha.com
Copyright © 2011 All rights reserved.
This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.
DRAFT

This product contains chemicals known to the State of California to cause cancer, 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 solder 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.
1. Critical Components Information
Components having special characteristics are marked ⚠ and
must be replaced with parts having specifications equal to those
originally installed.
2. 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 ohms shunted
by 0.15 μF.
■ TO SERVICE PERSONNEL
• Leakage current must not exceed 0.5mA.
• Be sure to test for leakage with the AC plug in both polarities.
WARNING: CHEMICAL CONTENT NOTICE!
For U model
“CAUTION”
“F3702: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A,
125V FUSE.”
For C model
CAUTION
F3702: REPLACE WITH SAME TYPE 8A, 125V FUSE.
ATTENTION
F3702: UTILISER UN FUSIBLE DE RECHANGE DE MÉME TYPE DE 8A, 125V.
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
INSULATING
TABLE
All of the P.C.B.s installed in this unit and solder joints are soldered using the lead free solder.
Among some types of lead free solder currently available, it is recommended to use one of the following types for the
repair work.
• Sn + Ag + Cu (tin + silver + copper)
• Sn + Cu (tin + copper)
• Sn + Zn + Bi (tin + zinc + bismuth)
Caution:
As the melting point temperature of the lead free solder is about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.
About lead free solder
2
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

■ FRONT PANELS
RX-V671 (U model)
RX-V671 (C, R, T, A, B, G, F, L, S models)
HTR-6064 (A, F models)
3
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

RX-A710 (A model)
RX-A710 (U, C models)
4
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

■ REAR PANELS
RX-V671 (U model)
RX-V671 (C model)
RX-V671 (R, S models)
5
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

RX-V671 (T model)
RX-V671 (A model)
RX-V671 (B, G, F models)
6
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

RX-V671 (L model)
HTR-6064 (A model)
HTR-6064 (B, G, F models)
7
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

RX-A710 (U model)
RX-A710 (C model)
RX-A710 (A model)
8
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

■ REMOTE CONTROL PANELS
RAV436
(U model)
RAV437
(C model)
RAV438
(R, T, A, B, G, F, L, S models)
9
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT

■ Audio Section
Rated Output Power (Power Amp. Section)
– 1 channel driven –
(1 kHz, 0.9 % THD)
U, C, R, T, A, B, G, F, L, S models (8 ohms)
FRONT L/R ................................................................ 125 W/ch
CENTER .......................................................................... 125 W
SURROUND L/R ........................................................ 125 W/ch
SURROUND BACK L/R ............................................. 125 W/ch
B, G, F models (4 ohms)
FRONT L/R ................................................................ 150 W/ch
– 2 channel driven simultaneously –
(20 Hz to 20 kHz, 0.09 % THD, 8 ohms)
FRONT L/R ..............................................................90 W + 90 W
(1 kHz, 0.9 % THD, 8 ohms)
FRONT L/R ..........................................................105 W + 105 W
CENTER ............................................................................ 105 W
SURROUND L/R ..................................................105 W + 105 W
SURROUND BACK L/R .......................................105 W + 105 W
Maximum Effective Output Power (JEITA) [R, T, L, S models]
(1 channel driven, 1 kHz, 10 % THD, 8 ohms)
FRONT L/R ......................................................................... 150 W/ch
CENTER .................................................................................. 150 W
SURROUND L/R ................................................................ 150 W/ch
SURROUND BACK L/R ..................................................... 150 W/ch
Dynamic Power Per Channel (IHF)
FRONT L/R (1 channel driven)
(8 / 6 / 4 / 2 ohms) ..................................... 130 / 170 / 200 / 240 W
Damping Factor (20 Hz to 20 kHz, 8 ohms)
FRONT L/R to SPEAKER-A ............................................ 100 or more
Input Sensitivity/Input Impedance (1 kHz, 100 W/8 ohms)
U, C models
AV5 etc. .......................................................... 200 mV / 47 k-ohms
R, T, A, B, G, F, L, S models
PHONO (MM) .................................................. 3.5 mV / 47 k-ohms
AV5 etc. .......................................................... 200 mV / 47 k-ohms
Maximum Input Signal (1 kHz)
U, C models (0.5 % THD)
AV5 etc. (EFFECT ON) ........................................................... 2.3 V
R, T, A, B, G, F, L, S models (0.1 % THD)
PHONO (MM) ....................................................................... 60 mV
(0.5 % THD)
AV5 etc. (EFFECT ON) ........................................................... 2.3 V
Output Level/Output Impedance
REC OUT ......................................................... 200 mV / 1.2 k-ohms
SUBWOOFER (2 ch stereo and FRONT SP: small)
.............................................................................. 1 V / 1.2 k-ohms
ZONE2 OUT ..................................................... 200 mV / 1.2 k-ohms
Headphone Jack Rated Output/Output Impedance
(1 kHz, 50 mV, 8 ohms)
AV5 etc. input ..................................................... 100 mV / 560 ohms
Frequency Response (10 Hz to 100 kHz)
AV5 etc., FRONT ..................................................................0 / -3 dB
RIAA Equalization Deviation [R, T, A, B, G, F, L, S models]
PHONO (MM) ................................................................... 0 ±0.5 dB
Total Harmonic Distortion (20 Hz to 20 kHz)
U, C models (50 W/8 ohms)
AV5 etc. (PURE DIRECT) to FRONT SP OUT ......................... 2.3 V
R, T, A, B, G, F, L, S models (1 V)
PHONO (MM) to REC OUT ......................................0.02 % or less
(50 W/8 ohms)
AV5 etc. (PURE DIRECT) to FRONT SP OUT ......................... 2.3 V
Signal to Noise Ratio (IHF-A Network)
U, C models (Input shorted 250 mV)
AV5 etc. (PURE DIRECT) to SP OUT .................... 100 dB or more
R, T, A, B, G, F, L, S models (Input shorted 5 mV)
PHONO (MM) to REC OUT ..................................... 81 dB or more
(Input shorted 250 mV)
AV5 etc. (PURE DIRECT) to SP OUT .................... 100 dB or more
Residual Noise (IHF-A Network)
FRONT L/R to SP OUT ................................................150 μV or less
Channel Separation (1 kHz / 10 kHz)
PHONO (MM) (Input shorted) .......... 60 dB or more / 55 dB or more
AV5 etc. (Input 5.1 k-ohms shorted)
...................................................... 60 dB or more / 45 dB or more
Volume Control/Step
......................................... MUTE / -80 dB to +16.5 dB / 0.5 dB step
Tone Control Characteristics
Bass
Boost/Cut ........................................ ±6 dB / 0.5 dB step, at 50 Hz
Turnover frequency ............................................................. 350 Hz
Treble
Boost/Cut .......................................±6 dB / 0.5 dB step, at 20 kHz
Turnover frequency ............................................................ 3.5 kHz
Filter Characteristics
FRONT, CENTER, SURROUND, SURROUND BACK small (H.P.F.)
.................... fc=40/60/80/90/100/110/120/160/200 Hz, 12 dB/oct.
SUBWOOFER small (L.P.F.)
.................... fc=40/60/80/90/100/110/120/160/200 Hz, 24 dB/oct.
■ Video Section
Video Signal Type
Monitor out (Wall paper)
U, C, R models ...................................................................... NTSC
T, A, B, G, F, L, S models ......................................................... PAL
Video conversion
.......................................................................................NTSC/PAL
Composite Video Signal Level
............................................................................... 1 Vp-p / 75 ohms
S-Video Signal Level [B, G, F models]
Y ............................................................................. 1 Vp-p / 75 ohms
C ..................................................................... 0.286 Vp-p / 75 ohms
Component Video Signal Level
Y ............................................................................. 1 Vp-p / 75 ohms
Video Maximum Input Level (VIDEO Conversion Off)
................................................................................ 1.5 Vp-p or more
Video Signal to Noise Ratio
................................................................................... 50 dB or more
Monitor Out Frequency Response (VIDEO Conversion Off)
Component video signal level ....................... 5 Hz to 60 MHz, -3 dB
■ SPECIFICATIONS
10
RX-V671/HTR-6064/RX-A710
RX-V671/HTR-6064/
RX-A710
DRAFT
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This service manual for the Yamaha RX-V671 AV RECEIVER is an essential resource for both professional mechanics and DIY enthusiasts. It provides detailed information on the front panels, rear panels, remote control panels, internal view, and specifications of the receiver. Additionally, it includes service precautions, disassembly procedures, firmware updating, self-diagnostic function, confirmation of idling current of the amp unit, display data, IC data, pin connection diagrams, block diagrams, printed circuit boards, schematic diagrams, and a replacement parts list. The manual is available in English and consists of 171 pages. It is compatible with Windows and Mac platforms.