Yamaha r 700

Page 1

STEREO RECEIVER

7®7©©/7O©M

SERVICE MANUAL

I FRONT PANEL
if

@i 11:) IE) it; (D

5 POWER (Power Switch)

@ RX MODE (RX Mode Indicators)

(3) FM STEREO (FM Stereo Indicator)

0 STATION LOCK (Station Lock Indicator)

0 SIGNAL OUALITY (Signal Quality Indicator)
(5 AM/FM Indicators

0 Digital Frequency Readout

(I) MEMORY (Memory Button)

(.9 TUNING (Tuning Button)

(It) PRE SET STATION (Pre Set Station Buttons)
i3) FM/AM (Band Select Buttons)

IE VOLUME (Volume Control)

I CONTENTS

REAR PANEL ..........................
INTERNAL VIEW .......................
SPECIFICATIONS .......................
DISASSEMBLY PROCEDURES ..............
ADJUSTMENTS ........................
BLOCK DIAGRAM ......................
WIRING ..............................
SCHEMATIC DIAGRAM ...................

@4425

...................................... 3
...................................... 10
...................................... 12
...................................... 14

(9496302er

1) PHONES (Headphone Jack)

{B SPEAKERS (Speaker Selector)

{9 HIGH (High Filter Switch)

013 BASS (Bass Control)

0]) TREBLE (Treble Control)

® SPATIAL EXPANDER (Spatial Expander Control)
m REC OUT (Rec Out Selector)

a9 INPUT (Input Selector)

a) BALANCE (Balance Control)

@ LOUDNESS (Loudness Control)
(3 MODE (Mode Switch)

@ FM MUTING (FM Muting Switch)

1
1
2

SINCE 1887

NIPPON GAKKI CO, LTD HAMAMATEIJ JAPAN

87 3 2 5K KT Lu .. @ Puma In Jamn

Page 2

R-700/700M

I REAR PANEL

* AUX Input Termlnals
Tape 1 REC/PB Termlnals
a Tape 2 REC.PB Termlnals
Power Cord

AC Outlets

. Speaker Termlnals

- GND (Ground) Termlnal
leno lnput Termlnals
FM Antenna Terminal, 75 ohms Unbal,
FM Antenna Termlnal, 300 ohms Bal.
GND (Ground) Terminal

3 AM Antenna Terminal

I INTERNAL VIEW

1 AM Loop Antenna
Tuner C. Board-1
RF Front End
Fower Switch
Tuner C. Board~2
R7700M: GA6434 Control C. Boardrl

Australian and Britlsh model: GA6428 er Control C. Board-2

N,European and W.Germany model: GA6426 is} Tuner C. Board-3
22* Main C. Boardrl

33" Power Transformer
USA. model. GA6424
Canadian model: GA6425
General model:
R7700: GA6427