Yamaha rv 1105

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AV RECEIVER

7 RX-V795IR-V1 1 05
RX-V795RDS

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, certifica-
tion or recognition of any applicable technical capabilities, or establish a principle-agent relationship
1 of any form.

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The rmearch. 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 distributors 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.

/

I CONTENTS

TO SERVICE PERSONNEL .. TUNER ADJUSTMENTS 22-25

1
1 DISPLAY DATA
2

REMOTE CONTROL PANELS. 26
FRONT PANELS IC DATA .27~37
REAR PANELS ................. ......... ........ 3~4 PRINTED CIRCUIT BOARD .. .33~61
SPECIFICATIONS . PIN CONNECTION DIAGRAM ................. . ....... .. 62
INTERNAL VIEW .7 BLOCK DIAGRAM .63~64
DISASSEMBLV PROCEDURES .7 SCHEMATIC DIAGRAM .65~73
SELF DIAGNOSIS FUNCTION PARTS LIST................ .74~92
FACTORY PRESET 20 REMOTE CONTROL TRANSMITTER 93
AMP ADJUSTMENTS ..... 21

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GrOK-95.257 Q5) (DEM Printed in Japan '98.12

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RX-V795IR-V1105IRX-V795RDS

I TO SERVICE PERSONNEL

1. Critical Components information. ' .
Components having special characteristics are marked A and

must be replaced with parts having specifications equal to those AC LEAKAEE
originally installed. WALL EQUIPMENT TESTER R
EQUIVALENT

2. Leakage Current Measurement (For 120V Model only). OUTLET UNDER TEST

When service has been completed, it is imperative that you ® 1) f

verify that all exposed conductive surfaces are properly insu- f

lated from supply circuits. ___
O Meter impedance should be equivalent to 1500 ohm shunted INSULATING

by 0.15 uF. TABLE

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

"CAUTION"
"F821 : FOR CONTINUED PROTECTION AGAINST RISK OF FlRE,REPLACE ONLY WITH SAME TYPE 2.5A,25DV FUSE

(G model)" i
"F822 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ONLY WITH SAME TYPE 4.0A,250V FUSE
(A, L, B, G models)"
"F823: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ONLY WITH SAME TYPE 8.0A,125V FUSE
(U, C, Fl, T models)
"F851 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ONLY WITH SAME TYPE 4.0A,250V FUSE
(R, T models)"

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/ERECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON
WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skinl 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.

I REMOTE CONTROL PANELS
VU, C, RT and L models VA, B and G models
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