Yamaha R-70 Manuale utente

I

1

R-70

/

R-70M

•

SPECIFICATIONS

•AUDIO

SECTION

Continuous

Power Per Channel

20Hz

to

20kHz,

0.015%

THO

8n. 45W

Dynamic

Power

1

kHz

I

HF

Signal

4f2

80W

2n.

80W

DIN

Standard

Output

Power Per Channel

1kHz1%THD8f2

55W(A)(B)(G)

Dynamic

Headroom

(IHF)

--

---

-

an.

1.3dB

Power Band

Width

0.02%

THO

22.5W

an

Damping

Factor

1

kHz

an

Input

Sensitivity/Impedance

Phono MC

MM

Aux,

Tape

Input

Sensitivity

(New

IHF)

Phono MC

MM

Aux,

Tape

Maximum

Input

Signal

0.02%

THO

Phono MC

MM

Output

Level/Impedance

1

OHz

to

30kHz

40

1soµv11

oon.

2.

5mV

/47kf2

120mV

/47kf2

24µV

0.37mV

18mV

7mV

110mV

Rec

Out

120mV

/4.7kn.

Headphone Jack Rated

Output/Impedance

0.015%

THO

0.67V/220n.

Frequency Response

20Hz

to

1OOkHz

Aux.

Tape

RIAA

Equalization

Deviation

50Hz

to

20kHz

Phono MC

20Hz

to

20kHz

Phono

MM

Total

Harmonic

Distortion

Phono

MC

to

Rec

Out

(1V)

MM

(1V)

Aux

Tape

to

SP

Out

1W/8n.

Intermodulation

Distortion

-3dB

±o.5dB

0.008%

Aux,

Tape Rated

Output/Sn.

0.008%

Signal

to

Noise

Ratio

UHF

-

A-Network)

Phono MC

(500µV

Input

Shorted)

75dB/73dB

(G)

MM

(5mV

Input

Shorted)

88dB/86dB

(G)

Aux,

Tape,

Tuner

(Input

Shorted)

100dB/98dB

(G)

Signal

to

Noise

Ratio

(New

IHF)

Phono

MC

MM

Aux,

Tape,

Tuner

Residual Noise

(!HF-A-Network)

Channel Separation

74dB/72dB

(G)

72dB/70dB

(G)

81dB/80dB

(G)

140µV

Aux,

Tape

5.1kn.

Shorted

lkHz

60d8

Filter

Characteristics

Low

(Subsonic

Builtin)

ccss

LOUDNESS

BASS

PRESENCE

Preset

MAX.

Preset

MAX.

Preset

MAX.

60Hz

250Hz

1kHz

4kHz

16kHz

60Hz

250Hz

lkHz

4kHz

16kHz

60Hz

250Hz

1kHz

4kHz

16kHz

60Hz

250Hz

lkHz

4kHz

16kHz

60Hz

250Hz

1kHz

4kHz

16kHz

60Hz

250Hz

1kHz

4kHz

16kHz

15Hz

-12d

B/oct

OdB

-2d8

-5dB

-

3dB

-1dB

-5dB

-12dB

-11d8

-

4dB

5dB

3dB

ldB

OdB

10dB

6dB

1dB

OdB

3dB

5dB

3dB

-2dB

OdB

7dB

lOdB

6dB

TREBLE

Preset

60Hz

OdB

250Hz

OdB

1

kHz

OdB

4kHz

3dB

16kHz

6d8

MAX.

60Hz

OdB

250Hz

OdB

lkHz

ldB

4kHz

7dB

16kHz

11dB

HIGH

FILTER

Preset

60Hz

1dB

250Hz

1dB

1kHz

OdB

4kHz

-5d8

16kHz

-6dB

MAX.

60Hz

1dB

250Hz

1dB

1

kHz

-1d8

4kHz

-8d8

-

-----

---~----'-

1

=

6

~

k

~

H

_z

_ _

-~11dBc:__

_

____

~

Output

Level/Impedance

(Fixed)

FM 100%

mod

1kHz

FM

40kHz

mod

AM

30%

mod

400Hz

•FM

SECTION

500mV/5kn.

380mV

/5kn.

(G)

150mV/5kn.

Tuning

Range

87.5

to

108

.

0MHz

50dB

Quieting

Sensitivity

(IHF,

75f2)

Mono

1.6µV

(15.3d8f)

Stereo

22µV

(38.1dBf)

Usable

Sensitivity

30dB Quieting 75!2

Usable

Sensitivity

(DIN,

75f2)

Mono

(S/N

26d8)

Stereo (S/N

46dB)

Image Response

Ratio

IF

Response

Ratio

Spurious Response

Ratio

AM

Suppression

Ratio

Capture

Ratio

Alternate

Channel

Selectivity

(IHF)

Selectivity

(two

signals)

(DIN)

Signal

to

Noise

Ratio

(IHF)

0.

8µV

(9.3dBf)

0.8µV

(9.3dBf)

(G)(B)(A)

25µV

(39.2dBf)

(G)(B)(A)

50d8

90dB

70dB

60dB

1.

5d8

55d8

60dB

(G)

Mono

85d8

Stereo

81d8

Signal

to

Noise

Ratio

(DIN-UNWeighted)

Mono

80dB

(G)(B)(A)

Stereo

76d8

(G)(B)(A)

Harmonic

Distortion

Mono

1

kHz

Stereo 1kHz

Harmonic

Distortion

(40kHz

Dev)

Stereo 1

kHz

Stereo Separation (I

HF)

1kHz

Frequency Response

50Hz

to

10kHz

Sub-carrier

Product

Ratio

(I

HF)

•AM

Section

Tuning

Range

Usable

Sensitivity

Selectivity

Signal

to

Noise

Ratio

Image Response

Ratio

Spurious Response

Ratio

Harmonic

Distortion

(400Hz)

•GENERAL

Power

Supply

US

& Canadian Models

General Model and

R-70M

European Model

British & Australian Models

Power

Consumption

AC

Outlet

Switched

Unswitched

Dimensions (W x H x D)

Weight

(U) .....

U.S.A

. model

(C) ..... Canadian model

(A) ..... Australian model

0.1%

0.15%

0.15% (G)

40d8

±o.3d8

55d8

510

to

1620kHz

(U)(C)

513

to

1620kHz

(G)(A)(B)

510

to

1620kHz

or

513

to

1620kHz

(R)

250µV/m

25dB

52dB

40dB

50d8

0.3%

120V

AC,

60Hz

11

OV, 1

20V,

220V,

240V

AC,

50/60Hz

220V

AC,

50Hz

240V

AC,

50Hz

200W

(U)(C)

320W

(G)(A)(B)

120W

(R)

200W

max.

200W

max.

435

x

122

x

386mm

(17-1/8

x

4-3/4

x

15-1/8)"

8.3kg

(18.3 lbs)

(G)

..

... European model

(B) ..... British model

(R) ..... General model

Specifications

subject

to

change

without

notice.

•

TO

SERVICE

PERSONNEL

(Prepared

in

accordance with

UL

Standard

1270)

Before service

of

this appliance by you, please

carefully read this service manual.

Please make Leakage-current or Resistance

measurements by suitable meter

to

determine

that

exposed parts are acceptably insulated

from

the

supply circui1t before returning the

appliance

to

the

customer.

A PROBE WITH SHIELDED LEAD.

B SEPARATED AND USED

AS

CLIP

WHEN

MEASURING CURRENTS FROM ONE

PART

OF APPLIANCE

TO

ANOTHER.

Confirm

that

the

leakage

current

is

not

more

than

0.5mA

AC.

•

REAR

PANEL

,..

U.S.A. & Canadian models

,..

General

model

(R-70M)

R-70/R-70M

LEAKAGE

CURRENT

MEASUREMENT

CIRCUITS

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GROUNDING

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TABLE

GROUND

SUPPLY

CONDUCTOR

B

Appliance

intended

for

connection

to

a

120

volt

power

supply.

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British & Australian models

,..

European

model

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R-70

/

R-70M

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VIEW

•1NTERNA

TRANSFORMER

.

GA66450

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66470

SA

& Cana .

GA

U· · · del ·

66480

European

mo

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GA

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Australian

m .

GA66460

Bnt1s

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R-70M

.

General

mod

,OARD

(1)

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CIRC~~I~

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FRONT

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(2)

A

TUNER

CIR

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0 POWER

TK2250Y

(i) POWER IC:

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STK3061

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3~0

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MPX

IC: LA37H (E, F)

•

IF

IC: µPC57

BOARD

(3)

4B

MAIN

CIRCU

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numbered)

: f disassembly

as

ts

in

order

o

tom

cover.

RES (Remove par .

the

top

and bot

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b removing

BLY

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is

possible y

DISASSEM

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circuit

boards in this ·ng Heat Sink

of

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ement

of

the

parts

4

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Lock

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Cover

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Fig. 1

Fig. 2

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board

111

Tuner

c1rcu1

Fig. 3

R-70

1

R-70M

ADJUSTMENTS

<CONFIRMATION

OF

AUDIO

SECTION>

Before

adjustment

Note

1:

After

the

power

switch

is

pushed

on,

wait

for

5

minutes

before

measuring,

to

be

sure

of

the

most

stable

operation.

Step

Confirmation

1

Power

supply

voltage

2 Gain

4 DC

offset

5

PHONO

amp

<TUNER

ADJUSTMENT>

•Before

adjustment

Test

point

+8

-8

+16

-16

+12

+5

+a

-a

IC414,

across

4

and E (Leh)

across

13 and

E (Reh)

IC414,

across

4

and E (Leh)

across

13

and

E (Reh)

PL,PR

Rating

or

standard

Adjustment

method

+43V

±av

-43V

±av

Make sure

that

AC

line

voltage

+16V

±

2V

comes

within

-16V

±

2V

Models AC line voltage

+12.5V

±

1V

+5.5V

±

0.5V

u.c

120V

± 10%

+av±

1v

G

220V

± 10%

-av±

1V

A.

B

240V

± 10%

+10V±1V

Apply

a

1kHz,100mV

sine wave

signal

to

the

points

"BL"

and

"BR"

OV ±

70mV

Apply

a 1

kHz,

2.5mV

sine wave

signal

to

PHONO

INPUT

+120mV

±

20mV

Apply

a

1kHz,

160µV

sine wave

signal

to

PHONO

INPUT

Note

1)

After

the

Power

switch

is

pushed

on,

wait

for

5

minutes

before

measuring,

to

be

sure

of

the

most

stable

operation.

•Measuring

instruments abbreviation

FM

SG

:

FM

signal

generate.

SSG

:

Stereo

signal

generator

AM SG :

AM

signal

generator

Note

2)

Adjust

the

OSC

coil

and

I

FT

with

a

nonferrous

screw

driver.

Note

3)

Do

not

forget

to

keep

the

bottom

cover

on.

1. FM

TUNER

SECTION

OSC

:

Oscilloscope

DIST.

M:

Distortion

meter

FC

:

Frequency

counter

ACVM

: AC

volt

meter

Remark

No

load

----

PHONO

selector

set

"MM"

PHONO

selector

set

"MC"

•Use

200Hz

to

15kHz

bandpass

filter

to

measure

the

REC

OUT.

•Set

the

switches

to

the

following

positions.

•On

step

1

and

2

connect

the

auxiliary

center

meter

(Ji00036

or

similar)

in series

with

the

resistor

1Okr!

between

TP1 (S

OUT)

and

TP2

(NVcc).

Auxiliary

center

meter

Step

Adjustment

item

Connection

Instrument

required

terminal

1

Discriminator

TP1

"'TP2

Aux

iI

iary

center

balance

adjust-

(Sout)(NVcc)

meter

ment

2

Station

center

set 300S1

FM

SG

confirmation

ANT

~98MH'

±1

kH'

l

70d8µ

(75.2dBf)

MONO

1kHz

100%

MOD

TP1

"'TP2

Auxiliary

center

(S

out)

(NV

cc)

meter

3

Monaural

distor-

300S1

FM

SG

tion

adjustment

ANT

[98MH'

± 1

kH'

j

70dBµ

(75.2dBf)

monaural

100Hz

or

400Hz

REC

OUT

100%

MOD

(TP6, TP7)

DIST.

M.

OSC BPF

INPUT

. . . . . . .

TUNER

Band

Select

. . . . FM

TUNING/MODE

AUTO

VOLUME

. . . . . Min

Adjustment

method

Rating

or

Remarks

locations

standard

T102

Adjust

so

that

the

(DISCRI

pointer

of

the

auxil-

CENTER)

iary

center

meter

points

to

0

at

detuned

point.

TUNING

SW

Confirm

that

the

auxil-

~up

or

DOWN

iary

center

meter

deflects

to

0 when

tuned

to

signal

of

FM

SG

VC101 Reduce

distortion

to

Less

than

Confirm

that

(MONO

DIST)

minimum

-64d8

all signal Q

Signal Q

indicators

light

I

4

R-70

/

R-70M

Step

Adjustment

item

Connection

Instrument

required

terminal

4

VCO

adjustment

300!1

FM

SG

I

ANT

[98MH'

±1

kH'

]

70dBµ

(75.2dBf)

Unmodulated

TP4

"'TP5

Resistor

2.2Mn

(19M)

(+12)

TP3

"'GND

FC

(19kHz)

5 Stereo

distortion

300!1

FM FM

SG,

SSG

adjustment

ANT

[98MH'

±1

kH'

]

70dBµ

(75.2dBf)

STEREO

L,

R

1kHz,100%

MOD

REC

OUT

DIST.

M,

OSC

(TP6,

TP7)

BPF

6 Separation

confir-

300!1

FM

SG,

SSG

mat

ion

ANT

r98MHd1kH'

l

70dBµ

(75.2dBf)

STEREO

Lor

R

1kHz,100%

MOD

REC

OUT

OSC,

ACVM,

BPF

(T.P6, TP7)

7

Pi

lot

cancel

300!1

FM

SG,

SSG

adjustment

ANT

[98MHd

1

kH'

]

70d8µ

(75.2d8f)

PILOT9%

MOD

REC

OUT

osc

(TP6, TP7) Disconnect BPF

8

If

offset

adjust-

300!1

FM

SG

ment

ANT

[98MHz

±1

kHz

J

70d8µ

(75.2dBf)

TEST

termi-

Short

nals

(K4,

T6)

9

Auto

search

300!1

FM FM

SG

reception

confir-

ANT

[98MH'

± 1

kH'

]

mat

ion

20d8µ

(25.2dBf)

MONO

1kHz

100%

MOD

2.

AM

TUNER SECTION

•Connect

the

AM

dummy

antenna

for

adjustment.

Step

Adjustment

item

Connection

Instrument

required

terminal

I 1

Sensitivity

confir-

AMANT

AM

dummy

antenna

mat

ion

AM

SG

l

400H,,

30%

MOD

l

50d8µ

630kHz

±0.1

kHz

1440kHz

±0.1

kHz

1080kHz

± 0.

1kHz

REC

OUT

OSC.

(TP6, TP,7)

DST.M

ACVM

2 Signal Q

indica-

AM

ANT

AM

dummy

antenna

tor

confirmation

AMSG

[1080kHz

±

0.1kHzJ

80d8µ

3

Auto

search

AM

ANT

AM

dummy

antenna

reception

confir-

AMSG

mat

ion

[1080kHz

±0.1

kHz

J

60d8µ

5

Adjustment

method

Rating

or

Remarks

locations

standard

VR103

CD

Connect

resistor

19kHz

±

Confirm

that

(VCO)

2.2Mn

between TP4

10Hz

stereo

indi-

(19M)

and

TP5

(+12)

ca

tor

Iights

and

force

the

set in

up.

Stereo indica- stereo

mode.

After

adjust-

tor

®

Adjust

so

that

VCO

ing,

remove

frequency

is

at

19kHz

the

FC

and

the

2.2Mn

resistor.

T101 Same

as

step 3

Less

than

(ST

DIST)

-48dB

G

model

only

Less

than

-33dB

--

~

-

Confirm

that

the

leak-

Less

than

age

level

of

the

26dB

opposite

channel

is

minimum

VR102

Observe

waveform

on

More

than

(PILOT

the

OSC and adjust

so

46dB

CANCEL)

that

carrier

leakage

level reduced

to

minimum

VR106

By

shorting

TEST

After

adjust-

(FM

FINE)

terminals,

the

counter

ing,

open

the

shifts

by

one

digit,

then

TEST

termi-

adjust

so

that

the

nals.

lowest

effective

digit

comes

to

9

or

0.

This

figure

98.0MHz-c~g.·~

When

shifting

TUNING

SW

Confirm

that

auto

Confirm

-+UP

or

search

reception

is

that

muting

DOWN possible

with

the

tun-

is

performed

ing

button.

at

auto

recep- I

ti

on.

•When

once the test terminals

are

shorted in adjusting

FM, the frequency

of

630kHz,

1440kHz,

and

1080

kHz

is

memoried at

each

AM

preset position 1, 2 and 3.

Adjustment

method

Rating

or

Remarks

locations

standard

Confirm

the

maximum

less

than

sensitivity

55d8µ

PRESET

P1

P2

P3

Confirm

that

all signal

Confirm

that

PRESET

Q

indicators

light

all

signal 0

P3

indicators

Signal Q go

out

at

detuned

point

TUNING

SW

Confirm

that

auto

-+UP

or

search

reception

is

DOWN possible

with

the

tunning

button.

I

3.

DIGITAL

CONTROL

SECTION

Step

Adjustment

item

Connection

Instrument

required

Adjustment

terminal

locations

1 Preset

memory

300D

FM FM

SG

FM/AM

SW

confirmation

ANT

[98MH'

±1

kH'

l

70dBµ

(75.2dBf)

MONO

1kHz

TUNING

SW

100%

MOD

MEMORY

SW

AM

ANT

AM

dummy

antenna

PRESET

SW

AM

SG

[1080kH' ±0.1kH']

80dBµ

400Hz,

30%

MOD

2

Last

channel

POWER

SW

memory

confir-

mat

ion

•TEST

POINT

Main

circuit

board (1)

D

DD

D420 J

490

,.},_

o~

@---@..

l..:!EJ

u

DD

~

J497 -

DD

~

J499

DD

~

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~

A R528

~

IC415

IC414

1sloooooooooooooooo

I,

R503

R501

~

-c:J-~

R-70,/R-70M

Adjustment

method

Rating

or

Remarks

standard

CD

Memorige

the

PRE-

CD

Press

the

FM

button

SET

P1

at

FM

SG

and

tuned

the

98MHz

frequency.

with

AUTO

seach

®

Memorige

the

PRE-

+

SET

P2

at

AM

SG

fre-

Press

the

Memory

quency.

button.

@Confirm

that

the

fre-

t

quency

memorized

is

The

Memory

indicator

recalled.

lights

about

3 seconds

t

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during

the

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t

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of

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the

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with

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the

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t

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the

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of

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t

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the

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out

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the

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of

P2

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CD

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the

PRESET

P1

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the

power

switch

off.

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about

5

seconds,

turn

the

power

switch

on.

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that

the

@

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P1

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SET

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not

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(2)

CONNECTION

DIAGRAM

OF

TRANSISTORS,

DIODS

AND

ICS.

25A777

25A970

(GR,

BL)

25A999

(E,

F)

25A

1127

(R, 5, T)

25C1923

25C2320

(E,

F)

2.SC2634 (R,

5,

Tl

250786

(Q,

R,

5l

250656

(D,

E,

Fl

2SD1012

(G, H)

2501302

(R,

S)

~

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15584

HZ9A-1

25C982

151555

HZ12B2

2SC1509

(P,

0,

R,

5l

152473

HZ18-IL

2SC2878

~

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ECB

Cathode

40481

RB402

(LFD)

S4VB20

@

258507

25C1983

2SD313

(E,

F)

SIRBA

NJM4558DV

.P

E

~~

µPC577H

(E,

Fl

~

M54459L

M5219L

M521~L

M5220L

8

I

LC4066B

.µPD4066BB

L109.110

L107, 108

R283,284

R285,286

R129

R131

SW101

R132

J161

J163

C103,104

R282

TUNER

(3)

J240, 243 -·- -

-·

-

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-

5TK3061

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~

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CE

I

LA3380

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.

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.

650

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...

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10

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. /

2 / "

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5TK2250Y

Yamaha R-70 Manuale utente

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