YAMAHA SERVICE MANUAL RX_V677.pdf

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RX-V677/HTR-6067/
RX-A740
SERVICE MANUAL
Note:
When the DIGITAL P.C.B. or IC82 on DIGITAL (1) P.C.B. is replaced, this unit will display Internal Error and will not
operate properly. The model name MUST be written to the backup IC (EEPROM: IC82 on DIGITAL (1) P.C.B.) to
have proper operation. (For detailed procedure, refer to related Service News or Service Bulletin. Or contact your
local Yamaha representative.)
AV RECEIVER
RX-V677/HTR-6067/
RX-A740
■
CONTENTS
TO SERVICE PERSONNEL ........................................... 2
FRONT PANELS ........................................................ 3–4
REAR PANELS .......................................................... 5–8
REMOTE CONTROL PANEL ......................................... 9
SPECIFICATIONS .................................................. 10–15
INTERNAL VIEW ......................................................... 16
SERVICE PRECAUTIONS ........................................... 17
DISASSEMBLY PROCEDURES ............................ 18–27
UPDATING FIRMWARE ......................................... 28–30
SELF-DIAGNOSTIC FUNCTION ........................... 31–70
POWER AMPLIFIER ADJUSTMENT........................... 71
DISPLAY DATA ...................................................... 72–73
IC DATA .................................................................. 74–87
PIN CONNECTION DIAGRAMS ............................ 88–89
BLOCK DIAGRAMS............................................... 90–93
WIRING DIAGRAM ................................................ 94–95
PRINTED CIRCUIT BOARDS ...............................96–118
SCHEMATIC DIAGRAMS ...................................119–133
REPLACEMENT PARTS LIST ........................... 135–155
REMOTE CONTROL.......................................... 156–157
ADVANCED SETUP................................................... 158
FIRMWARE UPDATING PROCEDURE ............. 159–170
1013 0 5
IP
'14.07
RX-V677/HTR-6067/RX-A740
■
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.
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
WALL
OUTLET
EQUIPMENT
UNDER TEST
AC LEAKAGE
TESTER OR
EQUIVALENT
2. Leakage Current Measurement (For 120V Models Only)
INSULATING
TABLE
• Meter impedance should be equivalent to 1500 ohms shunted
by 0.15 μF.
• Leakage current must not exceed 0.5mA.
• Be sure to test for leakage with the AC plug in both polarities.
For U model
“CAUTION”
“F3701: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2A,
250V FUSE.”
“F3702: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A,
125V FUSE.”
For C model
CAUTION
F3701: REPLACE WITH SAME TYPE 2A, 250V FUSE.
F3702: REPLACE WITH SAME TYPE 8A, 125V FUSE.
RX-V677/HTR-6067/
RX-A740
ATTENTION
F3701: UTILISER UN FUSIBLE DE RECHANGE DE MÉME TYPE DE 2A, 250V.
F3702: UTILISER UN FUSIBLE DE RECHANGE DE MÉME TYPE DE 8A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
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.
About lead free solder
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.
2
RX-V677/HTR-6067/RX-A740
■
FRONT PANELS
RX-V677 (U, C, R, T, A, B, G, F, L, S, H models)
RX-V677/HTR-6067/
RX-A740
HTR-6067 (A, G models)
3
RX-V677/HTR-6067/RX-A740
RX-A740 (U, C, A, B, G, L models)
RX-V677/HTR-6067/
RX-A740
4
RX-V677/HTR-6067/RX-A740
■
REAR PANELS
RX-V677 (U, C models)
RX-V677 (R, S models)
RX-V677/HTR-6067/
RX-A740
RX-V677 (T model)
5

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