Luxman Cl 35 mk iii User manual

ULTIMATE

HIGH

FIDELITY

STEREO

COMPONENT

[l[]]OOOO[)G[jO

CL35/m

CONTROL CENTER

SERVICE

MANUAL

CIRCUIT

DESCRIPTION

'.

1/2

12AX7

ECC83

1/2

12AX7

ECC83

1/2

12AU7

ECC82

200V

2«JV

l.OK

t------;jw~~::l

Signal

out

put

2",H

non ieverted

in put

fig. -1

Equalizer Amplitier

inverted

input

The

circuit

is

shown

in

the

Fig.

1.

This

amp

has

not

standard

method

of

Feedback,

about

which

special

explanation

is

made

hereunder.

Fig.

2shows

its

concept,

wherein

A-3 means

cathode-follower

with

its

gain

at

OdB.

While

A-2

has

+39dB

and

therefore

the

gain

is

+39dB

thru

A-2 and A-3.

At

A-I

the

output

impedance

is

110K ohms by means

of

electric

feedback

from

the

cathode

side.

Local

feedback

by 2.2M

ohms

can

be

stipulated

as

th~

formula

Beta

=

1/19.8

and amount

of

NF

is

14dB.

Therefore

the

gain

is

+25dB

thru

A-2

and

A-3, and

input

impedance

becoms

210K

ohms.

At

A-I

load

is

120K ohms and

gain

is

+32dB, and

therefore

the

total

gaLn

is

57dB.

Fig.

3shows

R.I.A.A.

complex.

The.

total

NF

shall

not

be

levied

below

the

cut-off

frequency

of

50Hz.

In

the

case

of

triode

it

is

possible

to

suppress

the

distortion

below

the

sensing

level

under

flg.-2

small

signals.

The

present

operation

point

lies

at

the

total

distortion

balance.

~

II

,.

..

330lPF

\~PF

II II

l;~F

rr

220PF

2201<

."

~

phono

position

MlC

position

This

amp.

plays

the

role

of

mic.

amp.

as

well.

fig.-3

1/2

12AX7

ECC83

1/2

12AX7

ECC83

82K

18K

10K

.--------_------Cl

+21OV

fig.-5

output

1/400V

non

inverted

input

0-----11-

inveried

in~ut·

o--~r-1IH

fig.-4

Fig.

4shows

the

circuit,

where

the

2nd

stage

is

constituted

by

dual

amps

of

local

feedback.

The

feedback

circuit

is

shown

in

Fig.

5.

~ow

Frequency

Trimmer

operation

is

done

by

the

feedback

circuit.

At

the

G)

position

roll-off

takes

place

at

100Hz

and

cut-off

takes

place

at

250Hz,

while

at

the

()

position

cut-off

commences

at

100Hz

and

roll-off

starts

at

220Hz.

25lJ<.

B1/2

12AX7

ECC83

Tone

Control

'"

~

§

~

l.

05mA

245V

Made

of

LUX's

exclusive

NF

type.

All

circuits

are

shown

in

Fig.

6.

This

is

standard

tone

control

with

LUX

amps.

Incidentally

operation

of

tubes

at

this

stage

depends

on

distortion

and

level

of

grid

current.

Signal

output

1/400V

140V

10001<

Signol

input

fig.-6

fig.-]

~271'

Signnl ovtp'ut

Low

Cut

Filter

As

per

Fig.

7.

this

is

-12dB/oct.

filter

composed by

2-stage

coupling

of

CR.

This

filter

frequency

depends

on

the

level

set

volume,

and

the

standard

point

lies

at

the

5th

decrement

from

the

max.

position

(-6dB)

."

2

?45V

~':!!2'!!_~~2.:.

Composed by

cathode-follower

as

per

Fig.

8.

The

bias

is

fixed

at

this

stage.

Noise

"

of

zener

is

reduced

down

to

the

aliowable

Signal

level

by

high

cut

filter.

'Jutp.Jl

fig.-S

4700P

4.7K

5.6K

92rnH

~~~~-g,!!_~~~!~::

Shown by

Fig.

9,

and

attenuates

-12dB/oct.

by

means

of

LC.

The

filter

frequency

is

decided

inview

of

load

and

lOOK

ohms

+200pF

(main

input

impedance

and

shield

wire).

Signa~

o----c)-.M)-----f--------1I------<O

S~~~pa~t

input

270P

470K

fig.-9

6.52V

Fig.

10

shows whole

circuit,

which

is

made

by

whole

stage

direct

coupled

pure

complementary

SEPP

configuration.

Q2

retains

the

fixed

current

load

triggered

by

Q3

and

yields

the

output

of

about

100rnW

into

8ohms.

Ql

Q3;2SC1222

Q2

;2SAMO

Q4 ;25C375

Q5 ;2SA562

Signol

output

~~g~:l

0--II-.Mf'-~-+___I(

p

2.

2/

22K

t---t--N'I--+-:-::C::c-1--lII---r--G

1.2K

fig.-lD

3

r---~--O+6.

52V

fig.-ll

lN4002

" 1

input

6.52V IN4002

rms

0

~

The

circuit

is

shown by

Fig.

11.

Power

supply

section

is

common

to

headphone

amp

and

pilot

lamp.

Q212

is

put

into

operation

the

instant

the

power

is

switched

on.

As

to

Q213

bias

is

gradually

given

on

the

base

through

R231

and

C215.

To

activate

it

some 0.4V

is

needed.

When

the

power

supply

is

100%

0.4V

equals

6%.

To

charge

6%,

T/CR

is

needed

by

6%

which

corresponds

to

24

sec.

(CR

=400uF.Kohms).

Q211

is

activated

when

Q213

is

turned

on,

and

relay

functions

to

break

allowing

the

Pre

Out

terminal

to

be

open

from

short-circuiting.

Q2l2

is

turned

off

the

instant

the

power

is

switched

off,

and

then

Q2l3

and

Q2l1

are

turned

off

to

let

the

relay.contact

make

and

short-circuited.

Thenafter

the

base

current

of

Q2l3

is

supplied

by

D204.

PB-667

"

4

en

,Ai

~g~§~--~~~~~~---~§~~~~~~~~!_~~~!~-~!~!

PB-667

Description

TYPE

QUANTITY

1.

Printed

Circuit

Board PB-667 1

2. Diode SD-lB 4

3. "lN4002 3

4.

"

M4E

2

5.

"lK188 1

6.

Varister

VD-1221

2

7.

Transistor

2SA562Y

3

8.

"

2SA640

2

9.

"

2SC735Y

2

10.

I!

2SC1222E

6

11.

Electrolytic

25V

4.7uF 1

12.

I!

10V

47

uF

4

13.

I!

6.3V 470uF 2

14.

I!

10V

330uF M

(NON

POLAR)

1

IS.

Tantalum

lOY

2.2uF 2

16.

Polyester

Film

SOV

0.047uF 3

17.

Ceramic

SOV

47pF 2

18.

Resistor

10K

~S%

lW

2

19.

I!

2.2K

11

I!

1

20

I!

lK

"

I!

1

21

270K

"

1/2W

1

22

1M;2

"

1/4W

1

23

68K

I!

2

24

47K

""2

25

27K

""2

26

22K

""2

27

15K

"

I!

2

28

12K

""2

29

I

10K

"

'1

3

30

I!

3.3K

I!

"1

31

I!

2.7K "

I!

2

32

"

1.

2K

""2

33

"680 ""2

34

"470 ""2

35

I!

100 " " 1

36

"

47

" " 4

37

"

8.2

""2

38

"1""5

39

Relay

6V

2

circuit

transfer(AE1322}

1

PB-668/'669

----------

1

Resistor

2.2M

~S%

1/2W

4

2"1M

I!

"

14

3"

560K

I!

....

~

4"

470K

I!

II

8

5

I!

220K

I!

"2

6"lS0K

I!

"2

7

I!

lOOK

""8

8"

82K

I! I!

2

9"

68K

,.

I!

4

10

I!

56K

""4

11

"

18K

""2

12

"

10K

""4

13

"6.8K " " 4

14

"5.6K

I!

"2

15

II

4.7K ""2

16

"3.3K " " 4

17

"1.2K

I!

"

~

18

"

IK

" " 4

19

"820 ""2

20

"470 ""2

21

"

47K

"

IW

2

22

"

33K

" " 2

.

23

"

270K

I!

1/2W

low

noise

2

24

Metalised

Film

400V

1

uF

4

25

"

400V

O.luF

2

26

"

400V

0.022uF 4

27

I!

250V

2.2uF 2

28

"

250V

1

uF

2

29

I!

250V

O.luF 2

30

Polyester

Film

SO

VO.lSuF 2

31

I!

SO

V0.068uF 2

32

"

SO

VO,039uF 2

33

I!

50

V0.027uF 2

34

I!

SO

VO.OluF 2

35

I!

SO

V0.OO39uF 2

36

Styrol

l2SV 3300pF 2

37

I!

125V

lOOOpF

2

38

I!

l25V 220pF 2

39

I!

l25V 150pF 2

40

"

50

V4700pF 2

41

"

50

Vl200pF 2

42

"

50

V270pF 2

43

I!

SO

Vl80pF 2

44

Ceramic

50

V47pF 4

45

I!

500V

33pF 2

46

I!

500V

10pF 2

47

Zener Diode

100W

lW

(ZBl-l00)

2

48

Electrolytic

6.3V 100uF

(tubler

type)

10

49

Coil

92mH

(7-1174) 2

SO

I!

2uH

(L-Ol) 4

51

Printed

Circuit

Board PB-668 1

52

"

PB-6U9

1

~.

tJ:j

t'"'

o

()

'"

t:J

H

::r>

~

OUT

PUT

HEAD

PHONE

~

TONE CONT.

AMP

~

CATHODE

FOLLOWER

~~

OUTPUT

LEVEL

SET

BASS FREQUENCY

...

,

-----.....:;,

SELECTOR

....

-----,.

A

B

L.CH.

~N'CONNECTOR

R.CH•

B

A

R.CH.

~~~

.Thisdiagram

is

for

the

LEFT

CHANNEL.

•Power source section

omitted.

I

,

'I

I ,

INPUT SELECTOR

r------------------r-,

I I I

I

AUX·2

AUX·'

MIC.

11NPUT IMPEDANCE

SELECTOR

AUX·3

PHONO·2

PHONO·1

MIC.

J.ACK

rr:::::

-J

SPECIFICATIONS

Tubes:

Frequency

Response:

T.H.O.:

Output

Voltage:

Output

Impedance:

I

nput

Sensitivity:

(output;

1

V,

output

level max.)

Input Impedance:

SIN Ratio:

Equalizer:

Tone Control:

Bass:

Treble:

Filter:

Low Frequency

Trimmer:

Attenuator:

Accessories:

Dimensions:

Weight:

12AX7 (6),

12AU7

(1)

15Hz-40,OOOHz

(-ldB)

no more than 0.06% (rated

output:

2V)

Max. 15V (distortion 0.3%)

550-ohms

phono-1

l.4m

V

phono-2

l.4mV

aux-l 140mV (variable)

aux-2 140mV

aux-3 140mV (variable)

microphone

0.7mV

phono~

1lOOK ohms, 50K ohms, 30K ohms

phone-2 50Kohms

aux-l lOOK ohms

aux-2 150K ohms

aux-3 lOOK ohms

microphone 50K ohms

better than 64dB (phono-l &2)

better than 77dB (aux-l & 2 & 3)

better than 60dB (microphone)

R.I.A.A. (strandard deviation ±0.3%)

LU

Xtype NF system

with

defeat position

150Hz, 300Hz, 600Hz

1.5KHz, 3KHz,

6KHz

Low cut 25Hz, 60Hz

High cut 7KHz, 12KHz

100Hz -800Hz

(±

0.8dB, 250Hz)

-20dB

Tape

Monitor

Circuit, Phono Input

Impedance Selector, Socket

for

step-up

transformer, Headphone

Ci

rcu

it

476

(19-1/25")W

x

275(11")0

x190

(7-3/5")Hmm

Net 12Kgs (26.40

Ibs)

Gross

14Kgs (30.8

Ibs)

Specifications and appearance design subject

to

possible

change

without

notice.

8

LUX CORPORATION, JAPAN

HEAD OFFICE

81

FACTORY

1-8-31 NAGAHASHI, NISHINARI-KU OSAKA

PHONE:632 0031 CABlE:lUXELECT OSAKA

TElEX:J63694

LUX

AUDIO

OF AMERICA

LTD.

200

Aerial

Way.

Syosset.

New

York

11791.

U.S.A.

PHONE:

(516)

822-7070

Printed

in

Japan

~.

---

-

----

------

PIE

OUT

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Luxman CL 35 mk III User manual

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