Luxman CL-35-Mk3 Service Manual

ULTIMATE

HIGH

FIDELITY

STEREO

COMPONENT

[l[]]OOOO[)G[jO

SERVICE

CL35 /m

CONTROL CENTER

MANUAL

CIRCUIT

'.

DESCRIPTION

non ieverted
in put

1/2

1/2

12AX7
ECC83

1/2

12AX7
ECC83

12AU7
ECC82

200V

2«JV

which

A-2

NFis14dB.

side.

special

has

+39dB

Local

2",H

fig. -1

Equalizer Amplitier

The

circuit
explanation

Fig.

2 shows

and

At

A-I
feedback
Therefore
A-I

At

is

therefore

the

output

by 2.2M

load

is

shown

its

the

in

is

made

concept,

the

gain

impedance

ohms

gain

is

120K ohms and

inverted

input

the

Fig.

hereunder.

wherein

is

is
can
+25dB

1.

This

amp

A-3 means

+39dB

be

gain

thru

110K ohms by means

stipulated

thru

is

A-2 and A-3.

as

and

A-2

+32dB, and

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

has

not

cathode-follower

th~

A-3, and

Fig.

standard

of

electric

formula

input

therefore

3 shows

l.OK

method

with

feedback

total

Beta=1/19.8

impedance

the

R.I.A.A.

Signal

out

put

of

Feedback,

its

gain

from

and amount

becoms

gaLnis57dB.

complex.

about

at

OdB.

cathode

ohms.

The.

While

of

the

210K

flg.-2

fig.-3

total

NF

shall
cut-off
of

triode

frequency

distortion

~

,.

..

\~PF

II II

l;~F

2201<

."

330lPF

rr

220PF

II

..

position

position

~

phono

MlC

small
point
balance.

This

amp.

well.

signals.
lies

it

below

at

plays

is

the

not

be

of

possible

the

sensing

The

present

total

the

role

levied

50Hz.

to

distortion

of

below
In

suppress

level

operation

mic.

the

amp.

the

case

under

the

as

non

input

inveried

in~ut·

fig.-4

Fig.
The

feedback
circuit.
while

inverted

0-----11-

o--~r-1IH

4 shows

At

at

the

1/2

12AX7

ECC83

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

the

circuit,
circuit
the

()

G)

position

is
position

where

shown

cut-off

1/2

12AX7

ECC83

in

roll-off

1/400V

the

2nd

Fig.

commences

5.
takes

stage

~ow

+21OV

output

is
Frequency
place

at

constituted

at

100Hz

Trimmer

100Hz

and

by

and

roll-off

82K

fig.-5

dual

operation

cut-off

starts

amps

18K

takes

of

is

at

10K

local

donebythe

220Hz.

place

feedback.

feedback

at

250Hz,

Signol

input

1/2

12AX7

25lJ<.

B

10001<

fig.-6

fig.-]

~271'

ECC83

Signnl ovtp'ut

140V

Signal

1/400V

'"

§

l.

05mA

output

~

~

245V

Low

Cut

As

per
composed by
This
set

volume,

the

5th

(-6dB)

Tone
MadeofLUX's

All
This
with
operation
depends
of

Filter

Fig.

filter

decrement

.

Control

circuits

is
LUX

grid

7.

this
2-stage
frequency
and

the

standard

amps.

of

on

current.

is
coupling

standard

from

exclusive

are

shown
tone

Incidentally

tubes

distortion

-12dB/oct.

depends

the

max.

at

of

point

control

this

and

CR.

on

the

position

NF

in

filter

lies

Fig.

level

type.

stage

level

6.

at

"

2

?45V

"

fig.-S

Signa~

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

input

5.6K

4.7K
4700P

Signal

'Jutp.Jl

92rnH

S~~~pa~t

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

Composed by
The

bias

of

zener

level

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

Shown by
means
decided

(main

by

of

input

cathode-follower
fixed

is

reduced

is
high

cut

Fig.

9,

LC.

The

inview

impedance

of

at

filter.

and

filter
load

this

down

attenuates

and

and

as

stage.

to

the

frequency

lOOK

shield

per

Fig.

Noise

aliowable

-12dB/oct.
is

ohms

wire).

8.

+ 200pF

by

270P

1.2K

470K

fig.-9

~~g~:l

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

p

2.2/22K

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

6.52V

Signol

output

Ql

Q3;2SC1222

Q2

;2SAMO
Q4 ; 25C375
Q5 ;2SA562

Fig.

10

shows whole

which

is

made

direct

coupled
complementary
Q2

retains
load
yields
100rnW

triggered

the

into

by

pure

SEPP

the

fixed

byQ3and
output
8 ohms.

circuit,

whole

stage

configuration.

current

of

about

fig.-lD

3