Yamaha R-50 - Service Manual

--
STEREO RECEIVER
R-50
I
FRONT PANEL
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CONTENTS
TOSERVICEPERSONNEL
......1
SPECIFICATIONS. ._....1
REAR
PANEL
.
..
. ......,
2
INTERNALVIEW.
......3
DISASSEMBLYPROCEDURES.
,.. 3
ADJUSTMENTS
4-6
PRINTED
CIRCUIT BOARD
7,8
SCHEMATICDIAGRAM
....9
BLOCKDIAGRAM
......9
PARTSLTST.
..10-19
SINCEI8'7
@YAMAHA
NIPPON
GAKKI
CO.,
LTD. HAMAMATSU, JAPAN
Printed
in
Japan
83.3.
2.5k
474
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Summary

Front Panel Controls

Service Personnel Guidance

Technical Specifications Overview

Detailed technical data for the receiver's audio, FM, AM, and general features.

Rear Panel Layout

Internal Component View

Disassembly Procedures

Step-by-step instructions for disassembling the unit.

Performance Adjustments

FM Tuner Section Adjustments

Adjustment steps for the FM tuner sensitivity, stereo separation, etc.

AM Tuner Section Adjustments

Adjustment steps for the AM tuner sensitivity and auto-search features.

Digital Control Section Adjustments

Procedures for confirming preset memory and channel memory functions.

Printed Circuit Board Layout

Electrical Parts List

Exploded View (All-over Assembly)

Mechanism Parts List (All-over)

Exploded View (Keyboard Unit)

Mechanism Parts List (Keyboard Unit)

List of mechanical parts specifically for the keyboard unit.

Electrical Components List

Yamaha R-50 Specifications

General

Tuning Range	FM, MW
Input Sensitivity	2.5mV (MM), 150mV (line)
Frequency Response	20Hz to 20kHz
Damping Factor	40
Channel Separation	50dB (1kHz)
Speaker Load Impedance	8 ohms