Yamaha RX V750

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AV RECEIVER/AV AMPLIFIER

RX-V750/DSP-AX750/DSP-AX75OSE

RX-V650/HTR-5760

SERVICE MAN UAL

IMPORTANT NOTICE \

This tnanual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
II has been assumed that basic service procedures inherent to the Illduslly, and more specifically YAMAHA Products. are already
known and understood by the users. and have therefore not been restated.

WARNING: Failure to follow appropriate seryice and satety procedures when Serwcmg this product tuay result tn personal
injury. destruction of expensive components. and failure of the product to perform as specified. For these reasons.
we advtse 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 authortzation, certification or
recognition of any applicable technical capabilities. or establish a principleoagem relationship of any form.

The data provided is believed to be accurate and applicable to the linms) indicated on the cover. The research, engineering, and service
departments of YAMAHA are continually striving Io ituproye YAMAHA products. Modifications are. therefore inevitable and
specificalmm are subyect to change without notice or obligalion to retrofit. Should any discrepancy appear to exist. please contact the

distributors Servxce 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: Tum the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.

I CONTENTS

TO SERVICE PERSONNEL .................... 2 AMP CHECK / D D |] J] D D J] .................... 47
MPEDANCE SELECTOR ...................... 3 DISPLAY DATA .......................... 43-49
FRONT PANELS ........................... 4-5 C DATA ................................ 50-60
REMOTE CONTROL PANELS .................. 6 BLOCK DIAGRAM ........................ 61-62
REAR PANELS ........................... 7-13 PRINTED CIRCUIT BOARD ................ 63-77
SPECIFICATIONS / D D J] [J ................. 14-18 PIN CONNECTION DIAGRAM ................. 78
NTERNAL VIEW ............................ 19 SCHEMATIC DIAGRAM ................... 79-88
DISASSEMBLY PROCEDURES / [J D D J] . .20-24 PARTS LIST ........... . . . . . 89-125
SELF DIAGNOSIS FUNCTION (DIAG) / REMOTE CONTROL RAV270, RAV271 . . . . 126-127

D J] D J] D J] J] [J J] D J] .................... 25-46 REMOTE CONTROL RAV248, RAV249 ........ 128

:mv- Ex72171m. III V-Qflimfiifibfiéfifi unlit
This Service Manual uses recycled paper.

fiYAMAHA

YAMAHA CORPORATION
PO. Box 1. Hamamaisu. Japan

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RX-V750/DSP-AX750/DS P-AX7505E
RX-V650/HTR-5760

I TO SERVICE PERSONNEL

. . . AC LEAKAGE
1. Critical Components Information WALL EQUIPMENT TESTER OR
Components having special characteristics are marked A OUTLET UNDER TEST EQUIVALENT
and must be replaced with parts having specifications equal
to those originally installed. ® :3-
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 INSULATING
from supply circuits. TABLE
0 Meter impedance should be equivalent to 1500 ohm shunted 0 Leakage current must 0t exceed 0.5mA.
.15 F.
by 0 I1 0 Be sure to test for leakage with the AC plug in both
polarities.
CAUTION
Ea F1, F2 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 10A, 125V FUSE."
A v
T CAUTION
F1, F2 : REPLACE WITH SAME TYPE 10A, 125V FUSE.
ATI'ENTION

F1, F2 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 10A, 125V.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or
plastic (where applicable) components may also contain traces of chemicals found by the California Health and
Welfare Agency (and possibly other entities) to cause cancer and/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/D D I] D D I] D D I]

The P.C.Bs installed in this unit are soldered using the fol- D D I] D I] I] I] I] D D I] D I] D I] I] [I I] I] [I I] I] I] I] [I I]
lowingsolder. DDDDDUDDDDDD
ComponentSide/D D I] Foil Side/D D D I]

DSP P.C.B. Lead Solder/D D I] I] [I D Lead Free Solder/D I] [I D D

FUNCTION P.C.B. - Lead Free Solder/D I] [I D D

OPERATION P.C.B. - Lead Free Solder/D I] [I D D

MAIN P.C.B. - Lead Free Solder/D I] [I D D

POWER P.C.B. - Lead Free Solder/D I] [I D D

SUB TRANS P.C.B. - Lead Free Solder/D I] [I D D

CONVERSION P.C.B. Lead Solder/D D I] I] [I D Lead Free Solder/D I] [I D D

Among some types of lead free solder currently available, it D D D D D D D D D D D D D D D D D D D D D I] [I I] I] I]

is recommended to use one of the following types for the D D D D D D D D D D D D D D D D D D D D D
repair work. U Sn-lAg-ICufl D +D +I:| I]

- Sn + Ag + Cu (tin + silver + copper) I] Sn-iCuI] [I +3 I]

- Sn + Cu (tin + copper) [I Sn-l-Zn-IBI [I I] +D D +D D U D U

- Sn + Zn + Bi (tin + zinc + bismuth)