Nakamichi PS-100, SF-100, LA-100, MB-150 MC, EC-100 Service Manual

Nakamichi

Service

Manual

Nakamichi

BlackBox

PS-100
SF-100
LA-100
BA-150
MB-150
EC-100
MX-100

Power
Sub-sonic Filter
Line
Bridging
MC
Electronic Crossover
Microphone

Supply

Amplifier

Booster Amplifier

Series

Adaptor

Mixer

CONTENTS

1. PS-100 Power Supply ........................................................................................................................................... 1

General,

and

2.

SF·100

General, Specifications, System Diagram, Schematic Diagram,

Mounting

3. LA·100 Line Amplifier ......................................................................................................................................... 8

General, Specifications, System Diagram, Schematic Diagram,

Mounting

4.

BA·

General, Specifications, System
Mounting

5. MB-150

General, Specifications, System
Mounting

6.

EC-100 Electronic Crossover ................................................................................................................................ 17

General, Specifications, System Diagram, Schematic

Mounting

7. MX.100 Microphone

General, Specifications, System
Mounting

Mute

Signal, Specifications, Schematic Diagram,

Parts

List,

Mechanism

Sulnonic

Filter ........................................................................................................................................ 5

Diagram

Diagram

150

Bridging Adaptor .....................................................................................................................................

Diagram

MC

Booster Amplifier ............................................................................................................................. 14

Diagram

Diagram

Diagram

and

and

and

and

and

and

Parts

Parts

Parts

Parts

Parts

Mixer

Parts

Ass'y

and

Parts

List

List,

Mechanism

List,

Mechanism

Diagram,

List,

Mechanism Ass'y

Diagram,

List,

Mechanism Ass'y

List,

Mechanism Ass'y

Ass'y

Ass'y

Schematic Diagram, -

Schematic Diagram,

..................................................................................................................................

Diagram,

List,

Mechanism Ass'y

Schematic Diagram,

Mounting

and

Parts List

and

Parts List

and

Parts List

and

Parts

Diagram,

and

Parts

and

Parts

Diagram

List

List

List

11

20

1.

PS-100 POWER SUPPLY

General

PS-100 Power Supply
PS-100
power

is

a regulated power supply unit designed

supply for the BlackBox Series (the rated

to

be

output
current: ±200 mA).
Although PS-100

nal,

two

input/output terminals

is

provided only with one

on

the other units

output

termi·

of

the

BlackBox Series make multiple connection of PS-100
possible.

To

prevent noise signal generation on switching

the power supply,

output terminals
circuit.

Refer

to

Table 1 showing how many units of the Black·

Box Series can

PS·

100 produces a mute signal, muting

of

each

unit furnished with a muting

be

driven

by

a single PS-100.

ON/OFF

Mute Signal

Mute

signal

is

muted for a certain period

prevent transient noise

Power

ON

Transformer

output

is

when

power

is

rectified through diode

ON

of

or

0403

time to

OFF.

and

smoothed by capacitor C408. Therefore, positive poten·
tial appears at C408 (transistor
0411

is

in

the

cutoff

state. C409 (22 µF)
negative
level
emitter voltage) of

potential through R414

where the voltage across C409 exceeds Vbe (base·

0412,

0412

0411

base). Accordingly,

is

charged with

(1

M.n), therefore at the

turns from

OFF

to

ON.

As a result,
from+ V to

a

(The mute time depends on C409 and R414

0413

turns on and the mute signal

-10

V, releasing the mute state.

is

after

changed

power

is

ON.)

Power OFF

Transformer output becomes zero and

with negative potential through R415.
the

voltage across C408 exceeds Vbe of

OFF

to

ON

from
0412

and C409

is

cut

off and

0413

is

quickly discharged. Thus,

is

the mute signal becomes + V (i.e. mute state).

acts

to

prevent + V from being discharged easily when

power

Specifications

Maximum
Output
Rated
Dimensions

Weight

is

OFF.

Power Consumption . 20

Voltage

Output Current . . . . . . . . ±

.................

............

..............

so

At

0411,

also

cut

VA

± 10 V

:200

mA
7-1/2(W)
3-15/16(0)

190\Wl

x60\Hl

3.5

lb,

1.6

C408

is

charged

the

level

where

0411

turns

off. Therefore

0402

x

2-3/S(H~

inches

kg

x

x 9910) mm

1

Table 1

Combinations

of

Units Driven

by

a single PS-100

~

Roting

'

Combination

Maximum
Drivable

Number

of

Units

Schematic

Diagram

1

2

3

4

5

6

7

PS-100

Power

Supply

4

VA

c±200mAl

POWER

SF-100

Sub-sonic

Filter

0.5

VA

t±25mAl

0
0
0
0

,

8

SUPPLY

P.c.a.

SIR

""

...

-,

I

LA-100

Line

Amplifier

0.5

VA

tt.25

rnAl

0
0
0
0

8

BA-150

Bridging

Adaptor

1 VA

(±50

0

0

0
0

4

mAI

~!

o~

;',~

MB-150

MC

Booster Electronic

Amplifier

2

VA

(±100

mAl

0

0 0
0

0

2 4

..

,

~;

"""'

,.,,

>S<••o

~!

::~

J~

o•o•

Uo2l'

EC-iOO

Crossover

t

VA

(±50

mAl

0

0
0

~~

MX-100

Microphone

Mixer

2

VA

1±100mAl

0
0

0
0

2

+1ov

U.S.A. /CANADA

VERSION

I

rELIROPE

VERs10N-

I

I

- - -

-.::--;:

M)

OP~

,,,,,~,,,,,,,,,

.,,,,.._~

--::-

14V

L

1

1

I

I

__

I I

I I

I I

I I

I

i.;;~'

•••

,~

I

L----------~~-~~J

Notes:

1.

Fuses marked with * 1 are

2. The

type

of spark killer marked

not

incorporated

with

•2

~

..

: .

.......

..

;:.,

in

differs in

Fig. 1.1

the

U.S.A. version.
some

2

<.l~

~~

countries.

;i;~

¥5

'I

.~tg~.

~~

0407

'"~"'

o~o•

2$843'

·~·<)

·~·.

·- .

Mounting

Diagram

and

Parts

List

~~~~~~~~~~~~~~~~~~~~~

0

0401

SIRBA

.-

--1

I I I

I

,\

I '1• I •
I

I.-~

I

'(

I I

L--_J

~ ~

0

\.

l>

y

1,i

I
I

I

C.T.

-I~

• 0

or~

0 '

•

0 0 0

AC

0

MUTE

Fig.

1.2

....

0

0

GND

c 0

+

0

Schematic

Ref.

No.

0401,407

408,410
411,412

0402

0403,404

405,409

413
0406
0401

0402,403
Z0401

R401,409

419
R402,408
R403
R404
R405,411
R406
R407

R410,418
R412
R413
R414,416
R415
R417
C401,403

C402,404

Part

No,

I

i

BA03855A

I OB07720A

OB06013A

OB01823A

0801872A

'

I

0806011A

I

0806088A
OB01909A

I OB06063A

OB01781A

OB05824A
OB05673A
OB05664A
OB05746A
OB01793A
OB05826A
OB01833A
OB05596A
0805563A
0805564A
OB05674A
0801921A
0801401A

0B01272A

Description

PS-100 P.C.B. Ass'y

Power Supply P.C.B.

Transistor

Transistor

Transistor

Transistor

Silicon

Diode

Silicon

Diode

Zener Diode

Carbon Resistor

Carbon Resistor

Carbon Resistor
Carbon Resistor
Carbon Resistor 1

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Electrolytic Capacitor

Electrolytic Capacitor

2SA733

250235
2SC945

2SB435
S1RBA

151555
YZ040B

4.7M

5.6K

3.9K

3.3K
11K
10K

220K

56K

820K

330K

470,u

100µ

1K

1M

(YI

ER0-25V

ER0-50T
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V

ER0-25V

25V

25V

Schematic

Ref.

J

J
J

J
J
J
J
J
J
J
J
J
J

No.

C405

C406,407

C408
C409

Part

No.

OB01391A

OB01502A

OB01780A
OB05820A

OJ035978
OE00607A

OE00507A

Description

Electrolytic Capacitor

220µ

Electrolytic Capacitor

330µ

Mylar

Capacitor

Electrolytic Capacitor

0.1µ

22µ

Heat Sink (1 pee.)
Screw

M3x8

Philips

Pan

Head

(3AI

(4

pcs.I

(2

Nut

Hex.

M3

pcs.}

25V

16V
50V

16V
(MS)

J

M

3

Mechanism Ass•y

and

Parts

List

L03

05

L04

07

13

06

Schematic

Ref.

No.

01

02

03
04
05

06
07
08

09

10

Part No.

OH03509A
0M03799A
OM03800A
BA03855A
0808161U
0806567A
0806568A

0808025U

0808355A
OB07172A
0807092A
0808037A

0808351A
0808325A
0808350A

08082198

0808348A

0808149U

11

Description

PS-100 Mechanism

Upper Cover
Caution Label G 1
Caution Label H
PS-100 P.C.B.Ass'y 1

Fuse
Power Transformer 1
Power Transformer
5P

Terminal

4P

DIN

Power Switch
Power Switch 1
Cord Bushing
Cord
Cord Bushing' 1

Power Cord

Power Cord

Power Cord

Power Cord 1

PS

630

mA

Socket 1

Bushing

00-120

220-240

Q'ty

V

V

Fig. 1.3

Schematic

1

,

2
1
1
1

1

1
1

1
1
1

Ref.

L01
L02

L03

L04

LOS

L06
L07

LOB

, 1

12

13

No.

Part

No.

HA03697C

OH03437A

0808361A
0808363A
0808342A

0808240A
0807096U
OE00713A
OE00606A

OE00538A

OEOQ594A

OEOQ714A

OE00651A
OE00593A

OE00157A

Description

Main

Chassis

PS
Rubber Foot
Spark Killer
Spark Killer

Spark Killer
Spark Killer
Spark Kiffer
Screw

M3x6

Screw

M3x6

(3A)

Screw

M4x5
Head
Screw

M3x8
Head
Screw

M2.6x6
Head
Washer 2.6 mm (plastics)
Screw

M3x6
Head
Washer 3

Ass'v

125 V {R+

125V{R+C)
125V{R+C)
250

V {R +

{C)

Philips
Philips

Philips Binding

Philips Binding

Philips Birlding

Philips Binding

mm

(plastics)

Tr.uss
Pan

Cl

C)

Head

Head

Q'ty

1
4
1

,

,

1
1
4
3

2

2

2

2
2

2

Notes: 1. 02, 08, 09 and 10 differ

2.

04

(fuse)

is

not

incorporated

in

versions.

in

the

U.S.A.

version.

4

2. SF-100 SUB-SONIC

FILTER

General

In disc record
tone arm and
Hz

and

dB.

SF-100

The

unit

recorded on disc records
tones

is

To

compensate

frequency

Filter, a Low Boost Switch

signal

approximately

With

both

turned

output

Filter.

The

output

2, while
through

the

range

Further,
load

impedance

of

characteristics can be realized by changing impedance

of

every device.

In

addition,

side

of

reproduction,

rumbling

their

peak level ranges

is

an active filter

is

designed

effected.

the

sound

caused by

of

the

OFF,

the

terminals

of

the

the

output

C2 and

of

to

R2 to

20-50

increase

is

a high pass filter

Amplifier 1

low-frequency resonance

of a turn

table exist at about

approximately

to

eliminate these noises.

so

that

no

low

frequency sound

is

sacrificed and no change

personal feeling

the

by 5 dB at

Filter

Switch

input

signal directly appears on the

without

twin-T

passing through the Sub-sonic

filter

of

the

amplifier

compensate

of

insufficiency

insertion

is

provided which can boost

30

and

is

of

Hz.

Low

amplified

is

positively fed back

the

level

Hz.

the

attenuation

lowered with R

to

ensure an ideal sub-sonic filtering

below 5

and the improvement

,

4

is

incorporated

from 5 to

the Sub-sonic

Boost Switch

by

Amplifier

reduction in

Hz,

in

characteristics.

of

10
15

in

in

low

the filter

the

input

Specifications

0.5

a

Maximum
Current
Total

Frequency

Sub-sonic

Low
Signal-to-Noise

Mute
Dimensions

Weight

System

Input

Power

Consumption

Harmonic

Response

Filter

Boost

.....

Function

..

................

Diagram

Consumption

...

Distortion

...

........

.

Ratio

'>-~4~.+-.-fl-.-'-H

.

.

.

C1

I I

L

______

Twi" T F'olter

VA

25mA

less

than

0.005%

20

kHz, 1 V

40

Hz ­Hz:

100

-50

10

-40

Boost)

30

Hz: + 5 dB

better

than
Network)
Furnished

7-1/21WI x 2·3/81HI x

.

CJ

" I

4-1/16(0}

190IWI

2.7 lb, 1.2

_J

inches

x60IHJ x 1031Dlmm

kg

A,,,...z(>..J..-~~

1

!

I

Mute

Output)

kHz±
dB,
dB

(with

110dB

(50

'"

'"'

Hz -

0.5

dB

Low

(IHF-A

Filter

Switch

Output

Fig. 2.1

Schematic

Ref.

No.

0101,102

201,202

0103,104

203,204

0105,205

0101.102
103,201
202,203

R101,201
R102,202
R103,203
R104.204

R105,205
R106,206
R107,207
R108,109

208,209
A110,210
A111,211
R112,212

R113,213

Part

No.

BA03849A

0807719A
OB06062A

OB06013A

OB01872A
0801909A

OB05700A
0805564A
OB05563A
OB05608A
0B01789A
OB05664A
0B01564A

0B01921A

OB01795A
OB01902A
OB05569A
0B05565A

SF-100

SF

P.C.B.

Transistor

Transistor

Transistor
Silicon

Carbon
Carbon
Carbon
Carbon
Carbon
Carbon
Carbon
Carbon

Carbon
Carbon
Carbon

Carbon

Description

P.C.B. Ass'y

Diode

Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor

Resistor

Resistor
Resistor
Resistor
Resistor

2sc1222

2SA733

2SC945
1S1555

470K ERD-25V J

220
330

3.9K

330K

4.7K

1.2K

121

ILi

1M ERD-25V J

ERD-25V

56K

ERD-25V J
ERD-25V J
ERD-25V
ERD-25V

82K

ERD-25V J

ERD-25V
ERD-25V

68K

ERD-25V

47

ERD-25V

Schematic

Ref.

No.

R114,115

119,214

215,219

R116,216

R117,118

217,218
C101,201
C102,202

C103,105

203.205
C104.204
C106,206

Part

OB05562A

OB05678A
OB05567A

OB05682A
OB01863A

OB05844A

OB05832A
OB05639A

J

C107,108

J

207,208

J

CN1
CN2 OB08236A

J

OB05884A

OB07167A
OB08182A

J
J
J

No.

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Mylar

Capacitor

Electrolytic

Mylar

Capacitor

Mylar

Capacitor

Electrolytic

Electrolytic

Push

Switch

6P-T

Post

4P-T

Post

Description

560

0.068µ

Capacitor

3.3µ

0.33µ

0.018µ

Capacitor

Capacitor

470µ

11

47K

33

1.5µ

pee.>

ERD-25V J

ERD-25V
ERD-25V J

50V

J

16V
50V

J

sov

J

35V

M

IMS)

10V

J

5

Schematic Diagram

m

Zl•50KJ1'

ILN'UT

"'

LEFT

l

"'"'

OUTPUT

Zo•560.n

Rl•10KQ

Zl•!50Kfl

ILN'UT

"'

ow

'"

RIGHT

l-··

OUTPUT
Zo•!560n

Rl~10Kfl

v16

S.f.

CN-1

-"

oO

_,

..

CN-1

CN•1

'

(

I
I

-1-2.,

~1a=

(/}I~;;:

,.

I

CN·h

I -

10

,~

'

CN-h

I

I

I

I

I
I

I

CN·f1

u'

'

,

P.C.B.

cio1

0.06SJ

o•

""

""

R102

'"

L

J,

":i 8

~I~

I~

I

lc201

~

"

"

Rl04

"'

,,

;:;~

~

"

'"

"

~

(;<i

C103

0.33J

e~

RIOS
330K

~

RZOS

.

•

u

N

"

N~
~~

oo

CIOS

1.5~

35V

•

RH

'"

;!:~

".

R117

"

>

,,

0

u;

Rn5

.,,

T

•o

=·

""

1

2SC945

>

••

oO

·~

:;:

;1jS

l;i119

"ru

1S15!S

"'

9.av
R2•7

CN-2

C

C

N·Z

N-2

'

"°

''"

MUTE

POWER

INPUT

POWER

OUTPUT

3t

•

2

u

C205

'~'

~

.

I

•9.SV

"

~

""~

R2•9

0203

Mounting Diagram and Parts List

Fig.

2.2

Fig.

2.3

6

Mechanism Ass'y and Parts List

LOl

L04

L05

03

05

08

Schematic

Ref. No.

01
02
03

04
05

06
07
08
09

10

L01
L02

Part No.

OH03507A
8A03849A
OJ036548
JA03061A
OJ03440A
08082908
OJ03277A
0808355A
OH03508B
OH03437A
OE00713A
OE00593A

09----j

10--~:1

L03~/

L02

Description

SF-100

Mechanism

Upper

Cover SF

SF-100

P.C.B. Ass'y

Front

Chassis

Push

Button

Ass'y
Switch E Block Base
6P Pin

Jack
Metal Seat Nut
4P DIN Socket
Main Chassis SF

Rubber
Screw M3x6 Philips Truss Head
Screw M3x6 Philips Binding

Head

Foot

Fig. 2.4

Schematic

O'ty

Ref. No.

L03

L04 OE00606A
1
1

1

2

1

1

2 Head
2

1 Head

4

4

2

LOS

LOG

L07
LOB

L09

LIO

M-------10

Part No. Description

OE00157A

OE00612A

OE00507A
OE00037A
OE00594A

OE00714A

OE00651A Washer

L10

Washer 3 mm (plastics)
Screw M3x6 Philips Pan Head

l3AI

Screw M3x6 Philips Pan Head

l2AI

Nut Hex.
Earth Lug B-5

Screw M3x8 Philips Binding

Screw M2.6x6 Philips Binding

M3

2.6

mm (plastics)

O'ty

7

2

5

1

1

5

4

4

7

3.

LA·lOO LINE AMPLIFIER

General
LA-100

is

an

amplifier with a

flat

frequency

may be inserted between amplifiers

output

amplifiers

The

dB
dB and 12 dB.

The

switches

of a tape

is

gain

is

by

combination

voltage

is

as follows:

S

1

S

1

S1:

S

1

deck

or

the

like

insufficient.

selectable

amplification

:

open,

Au11>

:

close, S

Aui2l

open,

Au13> = 4

close, S2:

:

at

four

levels,

of

IN/OUT

of

LA-100

:

S

close;

2

9.1 k //27

=

6.8 k

:

close;

2

9.1 k

//27

= 6.8 k II 6.8 k

S2: open;

(1M+9.1

k)//27

6.8 k

9pen;

of

k

k

(1M+9.1k)//27k

Aui4I = 6.8 k II 6.8 k

connected

when

the

0,

+6,

two

gain switches

at

each

[OdB]

(6

2

k'

~

response

to

input

gain

+12,

and

status

dB]

[12

8 [l8

of

of

dB]

dB]

that

Or

the

+18

of

6

the

Specifications

Maximum

Current

Total

Frequency

Signal-to-Noise

Reference

Input

Output

Mute
Dimensions

Weight

System

Input

Power

Consumption

Harmonic

Response .

Level

Impedance

Level/Output

Function

............

......•

Diagram

Consumption

...

Distortion

Ratio

.......

Impedance.

.

1

VA

50mA

0.005%

1 V

10

Hz -

-0.5
better
Gain)

Gain

.

50

kn

1

V/560

Furnished

.

7-1/2(W) x 2-3/SIHl
4-1/16(0)

190(W) x

2.7

(20

Hz -20

Output)

75

kHz+

dB

than

100

Switch 0 dB:

6dB'

12dBo

18

n

inches

60(Hl x 103(01

lb,

1.2

kg

12d8

dB

dB'

kHz,

0,

I+

1 V

0.5

0.25V

0.126

x

18

dB

V

V

mm

CW>._

I c I

I

R11a

I

••

I

.,.

~I~

Fig. 3.2

10P

'~'

C201

'

-

C•O•

10~

16V

0~8

----

Fig.

3.1

'"

I

_J

POWER

~PUT

8

Mounting Diagram

and

Parts List

I .

--~··:_-_.~

.J<

R101470K
R10Z 56K-

R105

'

o->./lfv-Q

-

.~

0-W.-001016

680

1S1555

o+f-

~~

-

~Q~

'-'iri

,i·

l.TJ

R103

- ·

·-----

220

~2K

~

'Zsc1222x2

:-··

-·-

..

~

'-:::--.,~

R201

•HOK , '"'

~

R202

o-->#v-0 u .., ' 22K '

R205

680

o--JWv-o

> 1

-j;_

~i('.

2b"?

D2011S1555

~

--~

R203

~

2SC1222•2

,........£~1-,

l"

o"

o'

! I

L.

___

....J

. •
R

,

210

~

Schematic

Ref.

No.

0101,102

104,105
201,202
204,205

0103,109

110,203
209,210

0106,107

108,206
207,208

0101,102

103,104
105,201
202,203

204,205

A101,201
R102,202
R103,203
R104,115

204,215

R105,114

205,214

R106,107

206,207

R108,109

120,208

209,220

~1

.

~a

r----,

I I I ~ - I

I o o I

I o o I

I I r

0 0 I

I

___

r

I b o-{t-o

L--------~-----------_J

_J

c§:

~1

LJ....

- SW1

~1

~ ~

•

f"'

:g~

QE

f

2SC94!h2

~-7'_.

\021'0\p11o

R220_

560

o-"Ny-o

______

r--:--,

I o o I

:1~

I o o I

; I . I ;

-.

I 0 0

J

·-

..,!

::1~

IN.

'--~-,

.

R~

R120

,o,

R1~.

o---

~G

R107

'R

~

117

~

'l9.1~~

I I

·t~

R1~-

-.J

R11<1680

~.103

113

R'

~sissi'

121<

~

0109~-

ZS~45

. .

I C1()8

10Jl16V"'

560

C106

.;-

Go-(~

4-ro;r1ov~~t

--,-'--·

0

Fig. 3.3

Part

No

8A03859A

0807721 A
0806062A

OB01872A

OB06013A

OB01909A

OB05700A
OB05563A
OB05608A
OB05569A

OB05559A

0805933A

OB05678A

..

LA-100

LA

Transistor

Transistor

Transistor

Silicon

Carbon
Carbon
Carbon
Carbon

Carbon

Metal Film Resistor 6.BK

Carbon

Description

P.C.B. Ass'y

P,C_8,

Diode

Resistor
Resistor
Resistor
Resistor

Resistor

Resistor

2SC1222

2SC945

2SA733

151555

ERD-14V

470K

ERD-14V

56K

ERD-14V

220

ERD-14V

47

ERD-14V

680

ER0-25VK

G

ERD-14V

560

121

Schematic

Ref.

R110,210
R111,211

R112,212
R113,213
R116,216

R117,217

R118,218

R119,219
R121,122

221
R123,223
R124,224
C101 ,201 OB01863A

C102,202

J C103,203

C104,108

J

204,208

J

C105,106

J

205,206

C107,207

J

SW1
CN1
CN2

J

~~~~

-o

2SC945

R116 27K G

~~'c1~p

6.8KG

47J16.3V

0!-1

. -

~1~15~5

,JfJ912~

.-~'

~

~~~~~3

0

')g~~~

~-

~

2!!

g~

-~!~

,._i

.,.

"'I"'

~ -~~';_

. 6 ~ C105

1"1111:.~

No.

,222

'.~ · R21~~5s5i'J"¢s1

107

1

2SA733

::r

oJ'.Nv--Q

0,..,

R112

> o-JWv-o ' .

'\-R111820·

,

c-[l--o,

470)11DV

--:·

-

--

·:-+:

- N 0

Part

No.

0805661A
0805511A
0805663A
0805650A
0805935A

OB05934A Metal Film Resistor

OB05564A

0805591A

OB05567A

0801920A
0805562A

OB01404A

0805744A
0801412A

0805884A

OB05798A

OB07170A Push
0808236A
OB08182A

1

R2~

o---

-o

re

R1oe.~:

-...._

.J

~

10

~

f « ' ' .

~

~-

R2~

R207 6 8KG

1

'.

RZl7~,

9_;1K~

R21915K ,

.

R21<16~:

3

! ,

o~

' j 12K·

~~~33

r

,,i,

':/.(/

-

~...

Q2~-

.....

ZSC

l•,

. ' . .-

,,

,C208

,._!

o:-(~

-

·10,.1sv"'

,,,,

;~-t' ' -~

',

~i\o--[._

,IE~

,•,,

r·

Carbon
Carbon
Carbon

Carbon

Metal Film Resistor

Ciirbon Resistor
Carbon
Carbon

Carbon
Carbon

Electrolytic

Electrolytic

Ceramic

Electrolytic

Electrolytic

Ceramic

4P-T
6P-T

.,.

· .

C206

...

~;\,..,~!-

470)11~:-~~i°

:

--:-

Resistor
Resistor
Resistor
Resistor

Resistor
Resistor

Resistor
Resistor

Capacitor

Capacitor

Switch

Post
Post

~~~01

~~~5

R216 27K 6

;..j.:o

c:ft'7op

47}16.3V

o::.{J-'.O

0~20~1~15~5.

~'z~

·,

')~205\·

2~

c(h

"!"'

'~'?:'?.,

..__

·

- .

Description

Capacitor

Capacitor

~

....

f-c.~s

~

222

~o

Q207

!I:

2SA733,J

1<1

~

i:3

~

~

u..,

R212· 10 ,

> '

~

\R21t820

-.

~

.C205

,

o-{...._.,'

470)110V J

22K

820

10
12K
27K

9.1K ER0-25VK

1M
15K ERD-14V J
33

100K

47K

3_3µ

-.

'

2

ff

,

33

I

0208

2'!iA733

o-wr0

R221

33

--.~

~

ERD-14V
ERD-14V J
ERD-14V J
ERD-14V
ER0-25VK

G

G

ERD-14V J

ERD-14V J

EAD-14V J
ERD-14V

16V

J

J

J

47µ 6.3V

33P

Capacitor

Capacitor

10µ

16V

470µ 10V

10P

SUE22

9

Mechanism Ass'y

and

Parts List

L01--ra,.

L04---~

L05

L05

05

02

08

03

L09

09

Schematic

Ref. No.

01
02
03

04

05
06
07
08

09

10

L01
L02

Part No.

LA·

100

OH03518A

8A03859A
OJ036548
JA03061A
OJ03440A
08082908
OJ03277A
0808355A
OH03519A
OH03437A
OE00713A Screw
OE00593A Screw

Upper Cover
LA·lOO P.C.B. Ass'y

Front
Push
Switch E Block
6P

Pin
Metal Seat
4P

DIN
Main
Rubber Foot

Head

Description

Mechanism

LA

Chassis

Button Ass'y

Base

Jack

Nut

Socket

Chassis

LA

M3x6

Philips Truss Head

M3x6

Philips Binding

10

Fig. 3.4

Schematic

O'ty

1
1
1

2

1
1
2

2

1

4

4

2

10

Ref. No.

L03 OE00157A
L04

LOS

L06

L07
LOB

L09
L10

Part

OE00606A

OE00612A

OE00594A

OE00037A
OE00714A

OE00651A
OE00507A

No.

Description

Washer 3 mm (plastics)
Screw

M3x6

Philips

(3A)

Screw

M3x6

12AI

Screw

M3x8
Head
Earth Lug

Screw

M2.6x6

Head
Washer

2.6

Nut

Hex.

B·S

mm (plastics)

M3

Pan

Philips

Pan

Philips Binding

Philips Binding.

Head

Head

O'ty

7
2

5

5

1
4

4
1

4.

BA-150

BRIDGING

ADAPTOR

General

Except

BA-150

Connection
power

for

the

exclusion

is

identical

of

BA~

150

amplifiers allows

fiers in monaural use,

output

The
the
and

Transistors

emitter

respectively. Q 104

amplifier,

circuit.
the
that
a non-inverted

permits

amplifiers

Schematic

twice

use

power

thus

output

is,

this

I'""'

LEFT

the

output

of

Nakamichi

output

the

follower

sound

0101

increase

quality is expected

and

and a

and Q 105

and

0103

0106

and

0107

of

0107

is

unit,

receives

output

bridging of the left and right

to

form a monaural power amplifier.

Diagram

P.C.B.

I

B.A.

Rl01

'"

"'

Si'i

,,

we•

of

power

to

supply

the

BA-100 presently available.

from

BA-150,

across a preamplifier and stereo

the

usage of stereo power ampli-

and

delivers the power amplifier

in

the

stereophonic configuration.

420

or

620

power amplifier permits

to

120W or 350W, respectively,

to

be improved.

0102

in

the first stage constitute

constant

current

power supply

constitute a differential

and

0101

provide a

constitute

current

mirror

a phase inverter

a phase-inverted signal of the input;

an

input signal and outputs it

and

a phase-inverted

C101

'\()»

16V

~~

outputs

C103

47,iiG.3V

11109

10~GI

output,

oj

the power

an

and

and

as

Specifications

Maximum

Current

Reference
Input
Reference

Output

Maximum
Maximum
Phase-symmetry
Dimensions

Weight

System

Input

Power

Consumption

Input

Impedance

Output

Impedance

Input

Output

.•....

........•........

Diagram

Consumption

..

Voltage

..•...

Voltage

Degree

.

Voltage

..

Voltage

Fig. 4.1

0.5

VA

25mA

1 v

10

k!l

1 v

500

!1

4V
4V
within

1°

7-1

/2(W) x

3·13/16(0)

190(W) x

2.4

lb, 1.1

!5

Hz -50

2-3/B(H)

inches

60(H)

kg

kHz)

x

x 9710)

""

t-~-+------..----+-~"o,c'~

POWER

INPUT

mm

l,,

..

,,

+

I'""'

RIGiiT

l'"""'

+

""

'"'

"'

we•

""

'"'

~~

11201

"

•

!

'::~

..

~

C201

~

i~

c102

11107

4.1 iGV

'"

11116

c;C~

4.1...,tGV

"'

no1

czoz

R21G c

O~

C20J

~~

li2

"'~

.

~

'i·0.59vl

oro•

Fig.

4.2

~

0

~

·7.8V

RZt9

'"

DIN JACK

POWER

OUTPUT

11

Mounting Diagram and Parts List

0

0 0

0

0

0

0

2SC1222f2l

~Q002

ROOl

""""

2~

271<

,,.--,

,,.

... , COO!

I

~)

\')

(I

BLU

RED

BLK

r

! I ,

,~J

~-------~--~------~

z

er

"

_,

-. ;

')

~:;.'

~ l

3

R217

1001<

~

R208

>

0

•

~1

8

~

0

C004

470JL10V

";"{~

470µ

10V

0:-..}-o

0

0

..

J

~

g~

~~~

•

R207

81e..f.,

~~

.,.

~21'/

2.71<

.

·~fl~~~

~g

ii:l"'

,

~

R202 560K

~

R20356K

100K

~

o----J

,f

~..,I

0201

2221211°k,.-P

~IR205

560

q_...:g;i;IJ/.to

<'.1'NU)

R210

-tu~f

~0201

;f

0203

2SA7~ I ~0204

..

.,~/

0

('

/2SC1222~2>

J

~~

~o~

2SA

a:~~

o-11-o'

C204

C206

470.utOV

o-<}-o

I.SOP

0------------o

Fig.

4.3

~o

R117

~

0

y-

N

L.,-JS

u 6 -

Q202

.J2Sc1222c21!2L..,..J~

1

~l:o

~~S!

:!.209

)~·

25<:!222<21

I~~

. .

33

~

~~'.

~ ~ ~~

~

C207

470J;!,10V

......

_]-<>

R2l9

33

OW«>

100K R102 5601<

0--W.0

- R103

£ R108 100K

a:

o-Wv-o

o----~

Ni~

o.Y'--,..

-"'-oQtOil

0

6 ~ 2SC122:2!2ll

~~Kl

R107

560

'

,_

Rt10

8~~

~0101•J~

G~

;f

03

.,.

2s2i~-I ~Q104

Rn1/.

(!)

•

2.71<

iY~·QlOst,

hJ~3~·-

~£

~of

a:ltl

1

~

C106

470.LL

IOV •

o-<}-o

',

R118

..

33,

.,.,,,..,,.

. J

-'

w

>-

-iw

!2L.-J°i

0 6 g a:

""1

.J2Sc1222c21

~

R105

.£llS,

1

-nr-o

RI09

2SC1222(2l

~

-

f-o

.'

:t

Ii: ,ii:

..

Ct07

470,1.1

0-i~

~~

>

I<)

-

~

Q102

:gfo

it:

g

,OC!l

~~

~

~~·

-~~

lOV

Q.-Wro

561<

OJo{\/1,-<J

o._:gi::;l

~

... ·-•

"\,1..>~f

-

l5~555/

(".

/2sc1222f.~

d

·'-.J<>~

2SA733~\'

~

·o-1

'C104

._

tSOP

Schematic

Ref.

No.

0001,101

102,104
105,201

202.204
205

0002,103

106,107
203,206
207

0101,201

R001,002

105,205

R101,113

201,213

R102,202
R103,203
R104,204
R106.206

R107,116

207,216

R10B,117

208,217

R109,115

209,215

R110,111

210,211
R112,212
R114,214

Part

No.

BA03863A

06076988
0806062A

OB06013A

OB01909A
OB05538A

OB01789A

OB05665A
OB05563A
OB05596A
0B0555BA
OB0567BA

OB01920A

0805895A

OB01782A

OB05661A
OB01793A

BA-150

P.C.B.

BA

P.C.B.

Transistor

Transistor

Silicon

Diode

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Metal Film

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Description

Ass'y

Resistor

2SC1222

2SA733

151555

27K

ERD-14V

ERD-14V

330

ERD-14V

560K

56K

ERD-14V

220K

ERD-14V

100

ERD-14V

560

ERD·14V

ERD-14V

100K

ER0-25VK

10K

G

2.7K

ERD-14V

22K

ERD-14V

3.3K

ERD·14V

l21

J

J

J

J
J
J
J

J

J

J
J

Schematic

Ref.

No.

R118,119

218,219

C003,004

106,107
206,207

C101,201

C102,105

202,205

C103,203

C104,204

Part

No.

OB05567A

0805884A

OB01412A

OB01389A

OB01404A

OB05599A

OE00037A

Carbon

Resistor

Electrolytic

Electrolytic

Electrolytic

Electrolytic

Ceramic

Earth

Capacitor

Lug B-5

Description

33

Capacitor

470µ

Capacitor

Capacitor

4.7µ

Capacitor

41µ

150P

(1

10µ

pee.)

ERD-14V

10V

16V

16V

6.3V

50V

J

12

Mechanism Ass'y and Parts List

L01~

02

05

Schematic

Ref.

No.

01
02
03

04

05
06

07

L01

L02

Part

No.

OH03523A

8A03863A
08082908
OJ03277A
0808355A

HA03709A

OH03437A

OE00713A

OE00606A

06

Description

BA-150

Mechanism

Upper

Cover

BA-150
BA-15.0 P.C.B. Ass'y
6P Pin Jack
Metal

Seat

Nut

4P

DIN

Socket

Main

Chassis

BA
Rubber
Screw
Screw

(3A)

Foot

M3x6

Philips Truss Head

M3x6

Philips

07r

O'ty

Ass'y 1

Pan

Head

Fig.

1
1
1
2
2

4
4
4

4.4

Schematic

Ref.

No.

L03
L04
LOS

L06
L07

LOS

Part

No.

OE00037A
OE00507A
OE00594A

OE00157A Washer 3
OE00714A

OE00651A Washer

Earth
Nut

Hex.
Screw
Head

Screw
Head

Lug

M3x8

M2.6x6

Description

B-5

M3

Philips

Binding

mm

(plastics) 5

Philips

2.6

mm

(plastics)

Binding

Q'ty

2

1
5

4

4

13

5. MB-150

MC

BOOSTER

AMPLIFIER

General

MB-150
MC

The gain

switching the Gain Switch

set

ered

Complementary
duce
The

NPN transistors, with low noise figures

source impedance, which are

tively
The
configuration

410,

input

Network).

is

a booster amplifier used

type

to

0.N, the

as

cartridge

can

the

be

input

output

at

low

output

selected

at

from the cartridge

without

circuits used

distortion.

first stage

is

composed

to ensure low noise figures.

second stage

and 630 Equalizing

noise figure

adopts

as

used in the first stage of Nakamichi

is

less

than

to

increase gain for

level.

two

levels

of

38

dB/22

dB

ON/OFF.

With the

is

directly deliv-

Pass

Switch

passing through the amplifier.

in

all

stages

of

MB-150 re-

of

10 PNP transistors and 10

at

small signal

connected

the particular triple

in

parallel respec-

transistor

610,

Amplifiers,

-158

and its

dB

(with R IAA I HF-A

equivalent

an

by

The first-stage transistors have the combination of NPN
and

PNP. Theoretically 1 if

types

are the same,

the

sistors are equal, and their base currents are

the

current amplification
voltage across the
values

of + and - power supply voltage.

input

circuits, However, a + or - voltage slightly remains

to

various factors and

the

characteristics

collector currents of these

the

hf

e's

are equal;

terminals vanishes

the

voltage should be adjusted

therefore

at

the identical

of

same if

In

actual

both
tran-

d.c.

due

to

zero by offset voltage adjustment.

Offset Voltage

1.

Insert shorted pin plugs

2.

Connect a PS-100
and

3. Connect an amplifier

to

4.

Adjust

that
operaton

Adjustment

into

power

supply

turn

the power

sound with

switch

to

headphones

the

semi-fixed volumes VR101 and

switching noises generated

of

the pass switch reduce

level.

Specifications

Maximum
Current
Total

Frequency Response . . . .

Equivalent

Ref.

Impedance . . . . . . . . . 5

Ref.

Maximum

Dimensions . . . . . .

Weight

Power

Consumption

Harmonic

Input

Output

Level/Output

Input

Level/Input

Input

.................

Consumption

. . .

Distortion

Noise . .

Impedance . 0.4

Level

. 2

input

jacks

of

unit

to

the

of

the PS-100 ON.

output

or

jacks

a speaker.

VR201

at

the

to

a inaudible

VA

100

mA

0.005%

0.3 V Output)
20

(+
10

-0.5

-158
Network)

63

200
30

7-1/2(W) x 2-3/8(H)
3·15/16(0)
190(W)

2.9

(20

Hz -20

Hz -100

38

Hz -100

mV/5.6

mV/56
µ.V/56

mV

mV

lb, 1.3 kg

kHz+

dB

Gain)

kHz+

dB

(+

22

dB

(RIAA,

n

n

n (+

(+

22

(+

38

dB

inches

x601HI x 100(Dlmm

dB

(+

dB

22

38

Gain)

MB-150.

MB-150

and

listen

ON/OFF

kHz,

0,

-1

0,

Gain)

IHF-A

dB

Gain)

dB

Gain)

Gain)

x

so

dB

System

Input

Diagram

r-----------------------------------..,

I I

I I

JPass

Pass I

3Bd8

22d8

Gain

Fig.

5.1

I

I

I

I

Output

14

Mechanism Ass'y and Parts List

L01---@..__..----

L04----,.,.

L05

03

04

09

Schematic

No.

Ref.

01
02
03
04
05
06
07
08
09

10

11

L01

Part

No,

OH03521A

BA03860A
OJ03654B
OJ03440A
JA03061A
OB03920B
OJ03277A

OB08394A

OB08355A

OH03522C

OH03437A

OE00713A

11

L03~

L02

Description

MB-150

Upper Cover MB 1
MB-150
Front

Switch E Block

Push
Grourid Terminal 1

Metal Seat
SP Pin Jack 1
4P

Main

Rubber Foot

Screw

Mechanism

P.C.B.

Ass'y

Chassis

Base

Button

Ass'y

Nut

DIN

Socket 2

Chassis

MB 1

M3x6

Philips Truss 4

Head

O'ty

Fig.

1
1
1
2

2

4

5.2

Schematic

Ref.

No.

L02

L03

L04

L05

L06
L07

LOS

L09

L10

L11

~--11

Part

No.

Screw

OE00593A

OE00157A
OE00606A

OE00612A

OE00732A Washer 3 mm
OE00037A

OE00507A
OE00594A

OE00714A

OE00651A

M3x6

Head

Washer 3 mm

Screw

M3x6

13AI

Screw

M3x6

(2A)

Earth

Lug

B-5 1

Nut

Hex.
Screw
Head
Screw

Head
Washer 2.6 mm

M3

M3x8

M2.6x6

Description

Philips Binding

(plastics)

Philips

Pan

Head 2

Philips

Pan

Head

Philips Binding 4

Philips Binding 4

(plasf1cs)

Q'ty

2

6

5

1

1

4

15

Schematic

Diagram

Schematic

Ref. No.

Part

No.

BA03860A

Description

MB-150 P.C.B. Ass'y

I

I

I
I
I

I

-:I:

I

~"

I

I
I

I

I

I

Rl<lHT I

lDUTPUT

@-'""'°C..:Hl~~::::r:~-1

""

Mounting Diagram and

I
I

.I•

,..1-;:;

..

,

..

,.

:

020•

0210

l,....,i

t::L~,....,,....,,,...,,..,...,,..,,..

.--':-t~~H~*"l-1.!:>~tf!C

i

~

x.:

I

0

I

I
I

'

~2•""---

I

"-'-1{1'

"-''t(,~H,~l-~,tf!C

0

66V

,-tf"-'r'J

~

' !

§ g

Fig. 5.3

_Parts

List

-

e.•v

..

[

"!

"'"

"

~221

DIN

JACK

(TR

P.C.B.)

2SC1B44

Q12:?

2SA991

0123

•!5

•!5

0124

Q121

0106 0107 0108 0109 0110

0206 0207 0208 0209

Fig 5.5

QZlO

012!5

0101-113

201-213
0114,214
0115,215
0116-128

216-228
0129,229
VR101.201 OB07159A Semi-fixed

R101.201 OB05587A
R102,202
R103,104

203.204

R105,106

205,206

R107,108

207.208

R109,110

209,210

R111,112

211.212

Rl

13,213

Rl

14,214

Rl

15,215

R116,216
R117,217

R118,218
Rl

19,219
R120.220
R121.122

221.222

R123,124

223,224
c101.201
C102,103

202,203

C104,105

106.107

110.111

113,114

204,205
206,207
210,211
213,214

C108, 109

208,209
C112,212
SW1
CN1

OB07722A
OB06120A

OB06062A
OB01872A
OB06119A

OB06121A

OB01885A
OB05511A

OB01793A

OB05649A

0805558A

0805545A

0B05661A
0801879A
OB05818A
0805562A
0B05952A

0805746A
0805854A
0B01920A
0805567A

OB01833A

OB01914A
OB01289A

0B05884A

0B01288A

0B01290A
0B07167A
0B08236A
0B08366A
0807738A

MB P.C.B.

Transistor

Transistor
Transistor

Transistor

Transistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

C~rbon

Resistor

Metal Film

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Carbon

Resistor

Mylar

Capacitor

Ceramic

Capacitor

Electrolytic

Ceramic

Ceramic

Push

Capacitor

Capacitor

Switch
4P-T Post
Shield Case

TR

P.C.B.

Volume

Resistor

Capacitor

MB

2SA991 126 pcs.I

2SC1222
2SC945
2SC1844 126pcs.)

2SA990
500

56

39K

820

3.3K

150

100

18

22K
33K

5.6
47K
91

6.8

100K

33

10K

3300P

220P sov

470µ

100P sov

0.01µ
SVE

ERD-25V
ERD-25V
ERD-25V

ERD-25V

ERD-25V

ERD-25V

ERD-25V

ERD-25V
ERD·25V
ERD-25V

ERD-25V

ER0-25VK
F
ERD-25V

1

ERD-25V
ERD-25V
ERD-25V

ERD-25V

50V

10V

50V

12)

(2 pcs.)
(2

pcs.)

J
J
J

J

J

J

J

J
J
J
J

J
J
J
J

J

Fig, 5.4

16

..•

I

6. EC-100

ELECTRONIC

CROSSOVER

General

EC-100, a

and

output

Each
power
A

combination

to

drive- a

The

by

combination

an adder,

and

a low-passed

of

the

two

amplifier

3-way

transfer

function

the formula:

separates

output

for

driving a 2-way

of

two

or

4-way

52

G H

Is)

transfer

The

as:

Gp(s) = -

Further, the added

GH

(s)

The transfer

pass filter circuit.

signal

of

The

crossover

from

66

Frequency

The

Frequency
positions
Frequency

These frequencies are
370,

440, 530,

5.4

k, 7 k,

the filters

EC-100 has
band

filter
switching
nal

systems

tance

simultaneously

resistance.

Note:

Resistors

accurate
positions.

The

-+-'-w-

= -

-

5

1

0

function

S-wo

S+wo

output

+ Gp(s) = (S

function

Therefore

lower

frequency

frequency

Hz

to

7.4

Control VR001.

Control·

in

total,

including

Control

and 9 positions

660,

and 7.4 kHz. The

is

12

dB/oct.

the

same

circuits;

system

that

of

have

and

crossover

standard

of

a high-pass filter, a phase

an

input

signal

output.

signals

is

delivered

speaker

or

more

EC-100's makes

speaker

GH

(s)

~)

2-

. . . . . • . . . . . . . . . . .

GP

(s)

....................

system.

of

a high

of

a phase

(Eq. 1 +

Eq.

w 2

+owol'

of

Eq. 3 accords

the

output

range.

setting

kHz

is

of

is

possible by adjusting the

interlocked

10

positions

at

66. 68,

and

78, 95, 120, 170, 250, 320,

880

Hz and

attenuation

characteristics

however,

EC-100

to

change

to

the

capacitors

as conventional

in

the

is

improved from

the

resistance

system

marked

frequencies

value

of

these

resistors

into

a high-passed

to

a respective

system.

it

pass

filter

..

• 1

shifter

is

expressed

2)

of

the adder

with

that

of

the

adder

EC-100

at

at

19

frequency

marked

the

middle of

1.4

k, 2.4

characteristic

crossover

frequency

conventio·

and

changing only

with *

will

when

frequency

and

capacitors

shifter

possible

is

given

2

is:

3

of a low

is

a

19

steps

or1

the

them.

k,

3.9

k,

of

multi·

capaci·

the

be adjusted

volume

Specifications

Maximum

Current

Attenuation

Crossover Frequencies .

Distortion

Signal-to-Noise

Ref.

Input

Ref.

Output

Impedance
Maximum
Mute

Function

Dimensions

Weight

in

order

is

interlocked

are shown

in

Power

Consumption

Consumption

. .

. . . less

Level/Input

Level/Output

.......

Input

.....

..........•.•....

Ratio

Level

.

. . . . . .

Impedance . 1

.

.

Schematic Diagram

INPUT

,

..

INPUT

·~

to

achieve

at

19

the

figure.

. . 2

VA

100

mA

12

dB/act.

66,

68,

78,

250.320,370,440,530,
660,

880

3.9

k,

5.4

than

0.005%

20

kH,)

better

than

Network)

V/50

kn

1

V/560n

4V

Furnished

7-1/2IWI x
3·15/16(0)
190(W)

x60(H)

2.41b,1.1

P.C.B.

IE

c

I

C101

CN·3

§i?

..

CN·3

CN-3

CN·3

10,. 16V

C20t

~

"'

'"

'"

'"

95,

120,

H,,

1.4

k,

7 k, 7

110

dB ( HF-A

2-3/81H)x

inches I

x

kg

,170,

k. :i.4

.4

kHz

(2 Hz -

I

System

Input

(cit--lAmp.1

k,

Diagram

>-..--+H-+-i

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

I I

I - I

(

I

I I

- I

1

--l

>-4-+--.---------i

I

v~)~~e

r---.,.--(<))

I I

J I

I L

I

I

I

I

I

-----,

. I

_____

Adder

I

I

I

Low

Volume

I

*"~--;--1())

I

I

J

I v I

I I

I I I I

L

__

l

_________

><

I High

~"'1

g.~1

.o,

Poss

Filter

,~.::_1---P~~s~~--.--,

I I I I

I

"'

t.lu!e

High Poss

.Output

I

LO~r~~~s

I

100(D)mm

I

I I

I I

I I I

I I

L

'"

"'

2SC900d

111011

"

>

~!~

w •

~e

Rto9

C<04

0.012J

______

R110

,-

1

C105

I

0.01V

1.8K

_:_

_____

Fig.

J

6.1

Ot02

1$1555

11'11

'"

c

..

C>1·2

.z

""

=tE:;

Lchl

High

Rchj

Pou

Output

"

c ..

(

I

,_

g~il

R<o9

0201

0202

0203

~!

~

·8.?V

~

~

1, IV

11209

i--.J--..l-_.J_~===-1--...:'.1''~,fi'l

0

il

§~I~

I

I

I

I N

r:-,,"Y"'-' • •

I
I

I

I

'

'

~~~

::>'c,..;"---...,----(1~,

~.+-::W:C-i--r---,-,-,,+'

0103

•S•555

0202

-2 ! •E:.

•,r , __

'"•)-"""'"-«>

Lchl

Low

J Reh J

Pou

Output

"l

R2•3

0203

\.

Fig.

6.2

17

( -

Mounting Diagram and Parts List

•

Fig. 6.3

Schematic

No.

Ref.

ICOOl, 101

201

0101,102

103,201

202,203
0104,204
0105,106

205,206

0101,

102
103,201
202,203

VROOl
VR002,003
RlOl,201
R102,202
R103,203
R104,204
R105,205
R106,206
R107,117

121,207
217,221

RlOS,109

208,209
301,302

Rll0,112

210,212

Rlll,113

211,213

Part

No.

BA03868A

08077398
0806124A

OB01910A

0806066A
0801872A

0801909A

0807182A
0807181A
0805700A
0801564A
0805608A
0805593A
OB05606A
0805688A
0801833A

0805663A

0801830A

0805641A

Description

EC-100 P.C.B. Ass'y

EC

P.C.8.

IC

Transistor

Transistor
Transistor

Silicon Diode

Volume
Volume lOK
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor
Carbon Resistor lOK

Carbon Resistor

Carbon Resistor 1.8K

Carbon Resistor

4558

25C900

250471
25C945

151555

200K

470K

82K

220

150K

22

390

10

47K

(El

(Cl
181

ERD-25V

ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V
ER0-25V

ER0-25V

ER0-25V

ER0-25V

J

J
J
J
J
J
J

J

J

J

Schematic

Ref.

No.

R114,115

118,119
214,215
218,219

Rl

16,120
122,216
220,222

Rl

23,

124

223,224

ClOl,107

201,207

C102,103

202,203
301,302

C104,105

204,205
C106.206
C108,208

C109,209
CNl,2,3

Part

No.

OB05955A

0805566A

0805678A

0801412A

0805884A

0805843A

0805681A
0801862A

0801913A
0808236A

Description

Metal

Film

Resistor lOK

Carbon Resistor

Carbon Resistor

Electrolytic

Electrolytic

Mylar

Mylar

Electrolytic

Mylar
4P-T

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Post

2.2k

560

10µ 16V

470µ

0.012µ

0.01µ

22µ

1800P

ER0-25VK
D

ERD-25V

ER0-25V

lOV

J

J

16V
J

J

J

18

:~·····)

Mechanism Ass'y

and

Parts List

-01

07

03

04

Schematic

Ref.

No.

01

02
03
04
05
06

07
08
09 OH03437A

LOl

I

Part

No.

OH03528A

HA03714A
8A03868A
OJ036898
08082908

OJ03277A
0808355A
HA03713A

OE00713A

EC-100

Upper
VR

Knob

EC-100

VA

Holder

GP

Pin Jack

Metal

4P

DIN

Main

Rubber

Screw

Description

Mechanism

Cover EC

Ass'y

P .C.B. Ass'y

MX

Seat

Nut

Socket

Chassis

EC

Foot

M3x6

Philips Truss Head

L03

L02

Ass'y

Fig. 6.4

O'ty

1

3

1
1
1
2
2

1
4
4

Schematic

Ref. No.

L02

L03
L04

LOS
L06
L07

LOB

L09

~09

Part

No.

OE00593A

OE00157A
OE00606A

OE00507A
OE00037A
OE00594A

OE00714A

OE00651A

L08

Description

Screw

M3x6

Philips Binding

Head

Washer 3 mm (plastics)

Screw

M3x6

Philips Pan

(3A)

Nut

Hex.

M3

Earth Lug B-5

Screw

M3x8

Philips Binding

Head

Screw

Head

Washer

I

M2.6x6

2.6

mm

Philips

(plastics)

Head

Binding

Q'ty

2

7
3

.

1
1
5

4

4

19

7.

MX-100 MICROPHONE

MIXER

General

MX-100

for

use as a simple
terminals
to

an

Further,

cassette

michi

In

system, such

is a mixing

unit

L-channel, A-channel,

microphone

on a tape

a

PA

(public address) amplifier

Aux.

input

deck,

of

a

preamplifier,

connection

console)

600

possible.

addition,

makes

connection

as

Nakamichi

having three

and

mixer

the

of

this

microphone

to

the

70011, 100011

unit

recording using six microphones.

In Fig.

7.1,

is

given

Au(L)

and

Au( BI =

The

the

gains

the gain

by

the

-R~,-+-"-R~x-

gain

-,,.--R"oy0-

of

of

the L-channel

formula:

Ry,

-+~R~y-,~

1

of

blend

microphone

2

R 2

the

--=c-

+Rx,+

mixing amplifier:

Ry

2

Blend.

connected

unit

allows

directly

etc.

to

recording

line

microphone

.............

amplifier:

.............

microphone

In

addition

to

line

the

application

connected

Nakamichi

by

input

of

a ca.ssette

or

500,

.

inputs

to

the

input

to

600

(a

Naka-

allows

amplifier

2

Therefore

the

Au(LO) = Au(L)

Similar

is

to

mixed in

the

the

Specifications

Maximum
Current
Total

Input
Input
Output
Maximum
Mute
Dimensions

Weight

Power

Consumption

Harmonic

Sensitivity
Impedance

Level/Output

Input

Function

....

............

output

of

R R

R:

L-channel,

A-channel.

Consumption

....

Distortion

..
..

Impedance.

Level .

the

L-channel

+ Au(B)

the

signal

.

.

is

expressed

as:

R:

of

blend

microphone

1

VA

50mA

0.05%

( 10.

kHz,

1 V

1 V

Input)

0.2

mV

10

kn

lOOmV/560!1

1

VI+

74

dBi

Furnished
7·1/21W)
4-5(16(0)

190(W) x 60(H) x 110(D)mm

2.7

lb,

1.2

x 3-3/B(HJ x

inches

kg

Output,

Au(ML)
Au(MBI

System Diagram

Left

Blend

Rs

/R3 (for

R

/R

5

L-channel mic. amp.

(for

Blend

4

Mic.

R1

Volume

Rx1

Blend Mic.

R2

Volume

Mic.

Volume

mic.

l

Ry1

R

amp.

output),

output).

R3

R4

R5

>--''--~c-----~O)

Mute

Mute

L Chonnel

Output

R Channel

Output

Fig. 7.1

20

Schematic Diagram

rl

""•"'x--;;Pc;c'Ca>lr-

I

-,

Ir

R204

Fig.

'

''

0204

_G

~

·0.0811

~fl

A21~

A2<6

-------

7.2

020~

r.;;

~

-

R2<8

,

~

~206

~

L---------

------

L,

.l

'"

'

OUTPUT

100mV

""

I

OUTPUT

''"

100mV

""

'"

l

.J,.'2YE~

- OUTPU

~~===~:·;":

-

----

•

I

0

:""c,1=+i==

~

'==::!J~

POWEii

21

Mounting Diagram and Parts List

.,..,_

;~-

= 771< 5

Mechanism Ass'y and

-'

.9-!'1

I

Parts List

•

LOl--

01

•

Fig. 7.3

Schematic

No.

Ref.

0101,104

201,204

301

0102,105

202,205
302

0103,106

107,203
206,207
303

D10T,T02 OBOT909A

20T,202 2T5,2T6

VR101,201 OB07175A

30T

R10T,20T

301

R102,123

T24,202
223,224
302

R103,203

303

R104,204

304

R105,205

305

R106,206

306

RT07,207

307

R108,208 OB0566TA

308

No.

Part

BA03866A

OB07724A
OB06062A

0806013A

OB01872A

0805563A

OB05558A

OB0559TA

OBOT564A

OB05847A

0801878A

080566911

MX-100

MX

Transistor

Transistor 2SA733

Transistor 2SC945 R112,212 OB05673A

Silicon Diode

Volume

Carbon Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Metal Film Resistor

Carbon Resistor

Carbon Resistor

Carbon Resistor

Description

P.C.B.

Au'y

P.C.B. R110,120 OB05562A

2SC1222

TST555

10K

(CJ

56K

ERD-T4V

TOO

ERD-14V

15K

ERD-T4V

82K

ERD-14V

ST

ER0-25VK

F

8.2K

ERD-T4V

TSOK

ERD-T4V

22K

ERD-T4V

(21

Schematic

Ref. No.

R109,209 OB01792A

309

122,126
210,220
222,226
310

R111,211

311,312

R113,1T4 OB05645A

213,2T4
313,314

RT15,1T6 OB05B95A

R117,217 OB05650A
R118,2T8 OB05538A

J

R119,2T9
RT2T,22T OB01793A

J

R125,225
C10T,104

107,108

201,204

J

207,208
30T

J

c102.202

302

C103,203

303

J

C105, 106 OB05885A

205,206

J

305,306 07 080835511

C109, T

J

209,210 330µ

CN1

Part

OB01795A

OBOT789A

OB05678A

OBOT4T2A

,304

OBOT288A

OBOT394A

TO

0805841A

OB08236A 4P-T Post

No.

Carbon Resistor 470

Carbon Resistor 47K

Carbon Resistor 4.7K

Carbon Resistor 5.6K

Carbon Resistor

Metal Film Resistor

Carbon Resistor
Carbon Resistor
Carbon Resistor 330
Carbon Resistor
Carbon Resistor 560
r:1ectrolytic Capacitor

Ceramic Capacitor 100P

Electrolytic Capacitor

Electrolytic Capacitor

Electrolytic Capacitor

Description

ERD-14V J

ERD-14V

ERD-14V

ERD-14V
ERD-T4T

270

TOK

ER0·25VK

G

12K

ERD-T4V J

27K ERD-T4V J

ERD-14V J
ERD-T4V J

3.3K
ERD-T4V J

TOµ

T6V

6.3V

220µ

10V

100µ

10V

)

J

J

J

J

Schematic

Ref. No.

OT
02
03
04 OJ036898
05
06 OB08362A

08 HA03711A

09 OH03437A

LOT

Part

No.

OH035261\

HA03714A

BA03866A

OB03882A

OE00713A

08

02~

I

09~

Description

MX-100 Mechanism L02 OE00593A Screw M3x6 Philips Binding

Upper Cover

VR Knob Ass'y 3
MX-100 P.C.B. Ass'y (3AJ
VR Holder
Headphone Jack 3

2P

Pin

4P DIN Socket 2

Main
Rubber

Screw M3x6 Philips Truss 4

Head

Jack

Chassis

Foot

MX

MX

MX

Ass'y

I:L03

L02

Fig. 7.4

Schematic

O'ty

Ref. No.

T

T

4

Part

No.

L03
L04 OE00606A

LOS

LOG

L07 OE0065TA

OE00157A

OE00766A Screw M3x8 Philips Binding

OE00714A

Description

Head
Washer 3 mm (plastics)
Screw

M3x6

Philips

Pan

Head

Head

TP
Screw M2.6x6 Philips Binding
Head
Washer

2.6

mm (plastics)

Cl'ty

2

4
3

2

4

4

22

Service Manual

Nakamichi

BlackBox

Series

I

I

Nakamichi

1-153 Suzukicho, Kodaira,

Phone' (0423) 42·1111
Tele"

2832610

Cable:

NAKAMICHI

Nakamichi

220

Westbury Avenue,

Carle

Place,

Phone' (516)

Tele"

144513

1101 Colorado Avenue,
Santa Monica, Calif.

Phone' 1213) 451 ·5901

Tele"

652429

Research

(NAKREI

KOKUBUNJI

Research ( U.S.A.l.lnc.

N.Y.

11514

333·5440

(NAKREI

90401

(NAKREI

Inc.

Tokyo

J)

CAPU

SNM)