Yamaha htr 6270

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AV RECEIVER/AV AMPLIFIER

RX-V765/HTR-6270/
AX-V765

SERVICE MANUAL

IMPORTANT NOTICE

This manual has been provided {or rhe use of aiirhoi-ized YAMAHA Relailers and rheir service personnel,
II has been assumed rhal basic service procedures inhereni ro rhe indusrry. and more specifically YAMAHA Producis. are already known

and understand by Ihe userso and have Iheletore not been reslaled,
WARNING: Failure lo lollow appropriaie service and safely procedures when servicing rhis producr may resull in personal injury.
desrruclion of expensive coiiiporieiiis. and failure of ihe producr to perform as speCIfied. Foi- lhese reasons. we advise
all YAMAHA producr owner-s iliar any service required should be performed by an aurliorized YAMAHA Rerailer or
ihe appoinred sei-vice represeniaiive
IMPORTANT: The presenrarmn or sale of lhls manual in any individual or firm does not consrirllre aulhorlzarlon. cerrificarion or
recngnillon of any applicable lechiiical capabiliiies. oi- esrablish a pl'lncipleeagem relaiionsliip of any form.
The dara provided is believed io be accurale and applicable io lhe iiiiins) iridicared on the cover, The research, engineering. and service
deparimenis oi YAMAHA are conrmiially srriving to improve YAMAHA pi-oducrs, Modlficalions are. iliereloi-e. ineviiable and
specifications are subjecr to change without norice or obligation Io retrofit Should any dlscrepancy appear to exkl, please contacl [he
distribumr's Service Division,

WARN

Slalic discharges can desiroy expensive coniponenis Discharge any sialic eleclriciiy your body may have
acciimulared by grounding yourselrio rlie ground buss in ihe unit (heavy gauge blach wires conneci io ihis buss).

IMPORTANT: Turn rhe unll OFF during disassembly and pan replacemeal. Reclleck all work before you apply power io lhe unir.

I CONTENTS

TO SERVICE PERSONNEL ............................................ 2 CONFIRMATION OF IDLING CURRENT OF AMP UNIT/

FRONT PANELS 7771:; #074 F U Dfimfimfiei

REAR PANELS .. DISPLAY DATA

REMOTE CONTROL PANEL IC DATA ...........

SPECIFICATIONS I afilifi PIN CONNECTION DIAGRAMS

INTERNAL VIEW ................ ....17 BLOCK DIAGRAMS ................. .
SERVICE PRECAUTIONS I fi-EXEUJSIEEIE ..... 17 PRINTED CIRCUIT BOARDS ...94-111
DISASSEMBLY PROCEDURES / gagging .1a-2o SCHEMATIC DIAGRAMS .. 113-124
UPDATING FIRMWARE / REPLACEMENT PARTS LIST . 125-147
77-LU7170)§-��§5A31~ ..................................... 21-31 REMOTE CONTROL .. 148-150
SELF-DIAGNOSTIC FUNCTION/ ADVANCED SETUP 151-152

GM 7'7 (a aéawimag) ....................................... 32-64 $w0§fi§z / IDEAIVii-fia ........................... 153-154

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This Service Manual uses IeCyCled papal.

YAMAHA

1 0 1 1 4 1 Copwlghl © 2009 YAMAHA CORPORATION All rlghls reselved,
This manual is copyrighied by YAMAHA and may not be copied or
ledlsvlbuled eimer in prinr or elecrronicallv vvirhoui peImlSSIon YAMAHA CORPORATION
P.O.Box 1, Hamamatsu, Japan

animate 09.05

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AX-V765

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RX-V765/HTR-6270lAX-V765

I TO SERVICE PERSONNEL

.Critical Components Information

Components having special characteristics are marked A 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.

0 Meter impedance should be equivalent to 1500 ohms shunted
by 0.15 uF.

For U model
IE9 CAUTION

AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT

@ID-

J:

INSULATING
TABLE

- Leakage current must not exceed 0.5mA.
0 Be sure to test for leakage with the AC plug in both polarities.

EALV F3701: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 10A,

125V FUSE."

For C model
CAUTION

F3701: REPLACE WITH SAME TYPE 10A, 125V FUSE.

ATTENTION

F3701: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 10A, 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 l fiflal \DfiIZ'DLT

All of the P.C.l3.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.

0 Sn + Ag + Co (tin + silver + copper)

0 Sn + Cu (tin + copper)

0 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.

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- Sn+Cu (fi +313)

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