Sansui P-M7 Manuel utilisateur

oe

OMAT.

ie

1.

BLOCK

DIAGRAM

Terminal

MB884

1-566M)

36

fO3

B

Sensor

1LD2

“=e

K

f06

Isnal

>

al

K

1

C

Sensor

f{LO3

Za

O7

_

i3

2

pb

U

Sensor

uP

=

>

D

Sensor

o-o

DOWN

_

Micro

Switch

Sensor

Sensitivity

Selection

Micro

Computer

f1C3

MB884)

-

566M

aul

i

Computer

+5V

Editing

QL

Ind

fQ

gLDe

”

'

bs

t{

gLDi}/

Music

ty

>

iy

s

Selection

nd

4

fC

107]

7

|

'

gi

De

1

Nay

i

Repeat

Ind

|

fie)

i)

CPU

ind

fO1

gLDIo

Normal

Speed

Select

33%

rpm

50H2

45rpm_)—

67

SHz

|

SSD-1_MOTOR

CONTROL

Driving

Tone

Arm

Vertically

Driving

Tone

Arm

Horizontally

Analog

Switch

TC9I24P

PLL

P-M7

2.

OPERATIONS

(see

Fig.

2-1,

Fig.

2-2,

Fig.

2-3,

Timing

Chart

and

Block

Diagram)

This

fully-automatic

player

is

of

the

linear

tracking

arm

type,

being

provided

with

the

following

various

functions:

1)

automatic

random

music

selection

(seven

musics);

2)

automatic

record

disc

size

selection

(30cm-

25cm-and

17cm-dia.

discs);

3)

automatic

speed

selection

according

to

disc

sizes

(33

1/3

rpm

and

45

rpm);

and

4)

computer

editing

in

cooperation

with

a

cassette

deck

(D-M7,

SC-A33,

D-570,

and

D-370).

2-1.

Fully-automatic

System

Outline

This

fully-automatic

system

player

comprises

1)

an

automatic

mechanism

for

driving

a

tone

arm

horizontally

and

vertically

and

2)

a

control

section

for

electrically

contro!

the

automatic

mechanism.

The

automatic

mechanism

assembly

includes

tone

arm

position

sen-

sors

(A,

B

and

C

sensors),

lifter

position

sensors

(UP

and

DOWN

sen-

sors),

an

arm

servo

sensor,

and

an

automatic

disc

size

selection

sen-

sor

(E

sensor)

and

an

automatic

music

selection

sensor

(F

sensor)

both

mounted

on

the

tip

of

the

cartridge,

in

addition

to

the

auto-

matic

mechanism,

in

order

to

detect

the

conditions

of

the

tone

arm.

The

control

section

includes

a

microcomputer

MB

8841-566M

and

its

peripheral

circuits,

in

order

to

control

1)

start/stop

of

a

DD

motor,

2)

lead-in,

lead-out,

return, repeat,

and

up-and-down

move-

ment

of

the

tone

arm,

and

3)

automatic

disc

size

selection,

auto-

matic

music

selection

and

automatic

disc

speed

selection,

in

re-

sponse

to

each

output

signal

outputted

from

each

sensor.

2-2.

Automatic

Mechanism

Assembly

Operation

1.

Inorder

to

drive

the

automatic

mechanism

assembly,

that

is,

to

drive

the

tone

arm

horizontally

for

tone

arm

lead-in

and

lead-out

operations,

the

revolution

power

of

the

micromotor

(I)

is

trans-

mitted

through

a

belt

(A),

a

warm

gear

(A)

a

drive

gear,

and

a

wire.

2.

In

order

to

drive

the

tone

arm

vertically

for

tone

arm

up-and-

down

movement,

the

revolution

power

of

the

micromotor

(Il)

is

transmitted

through

a

belt

(B),

a

warm

gear

(B),

a

lifter

cam,

and

a

lifter

plate.

The

tone

arm

is

driven

vertically

by

moving

up

and

down

an

arm

holder

weight

mounted

on

an

arm

shaft.

2-3.

Each

Sensor

Function

For

Fully-automatic

Operation

:

A.

A

Sensor,

B

Sensor,

and

C

Sensor

As

shown

in

Fig.

2-2,

the

A,

B,

and

C

sensors

detect

tone

arm

posi-

tions

required

for

automatic

operation

in

such

a

way

that

three

phototransistors

(fQ5,

fQ6

and

fQ7)

are

turned

on

or

off

whenever

a

position

guide

moves

between

three

phototransistors

mounted

on

a

sensor

holder

and

covered

by

a

slit

plate

and

three

LEDs

(fLD1,

fLD2

and

fLD3).

The

A

sensor

detects

the

lead-in

positions

of

30cm-,

25cm-,

and

17cm-dia.

discs

and

the

lead-out

position

of

a

17cm-dia.

disc.

Fur-

ther,

the

B

sensor

and

the

C

sensor

detect

in

combination

the

disc

size

selection

positions

of

30cm-,

25cm-,

and

17cm-dia.

discs.

The

B

sensor

detects

the

lead-out

positions

of

30cm-

and

25cm-dia.

discs

and

the

positions

required

for

operating

the

automatic

music

selection

sensor

(E2

sensor).

That

is

to

say,

when

the

E2

sensor

detects

some

lead-over

groove

while

the

B

sensor

is

kept

turned

on

(in

this

case

the

input

port

No.

27

of

the

microcomputer

is

at

a

L-voltage

level),

the

tone

arm

stops

and

begins

to

come

down.

The

C

sensor

detects

the

disc

size

selection

position

of

a

17cm-dia.

disc

in

combination

with

the

A

sensor.

B.

UP

(U)

Sensor

and

DOWN

(D)

Sensor

The

U

sensor

and

D

sensor

are

made

up

of

a

lifter

cam

and

two

microswitches.

The

U

sensor

detects

the

up-position

of

the

tone

arm,

and

the

D

sensor

detects

the

down-position

of

the

tone

arm.

When

the

U

sensor

or

D

sensor

detects

the

up-

or

down-position

of

the

tone

arm,

the

terminal

of

each

microswitch

is

grounded.

C.

E

Sensor

and

F

Sensor

Being

mounted

on

the

tip

of

the

cartridge,

the

E

sensor

and

F

sensor

supply

three

signals

required

for

automatic

disc

size

selection

and

automatic

music

selection

to

the

microcomputer,

after

having

di-

vided

the

output

signals

into

E2,

E3

and

F2

signals

through

an

elec-

tric

circuit.

@

£2

signal

The

E2

signal

is

a

music

number

counting

signal

required

for

moving

down

the

tone

arm

at

a

desired

music

position

during

the

automatic

music

selection

operation.

When

the

E

sensor

detects

a

desired

lead-

over

groove

and

the

E2

signal

is

generated

(changes

to

a

H-voltage

level)

(in

this

case,

the

input

port

No.

33

of

the

microcomputer

changes

to

a

L-voltage

level),

the

tone

arm

stops

moving

horizontally

and

coming

down.

Arm

Shaft

Bearing

Fig.

2-1

Wire

=>

¢z=

yr

y

se

=

7

@

©

in}

Drive

Gear

$2

Auto

Mechanism

Ass‘y

Position

Guide

Warm

GearlA)

Belt(A)

a]

|

[

A,B,C

Sensor

$-01

12105106

07)

Sht

Plate

Asia)

|

Guide

$-011

11101

.f102.1103)

Fig.

2-2

Warm

Gear(8)

D

Sensor

Micro

SW.

Lifter

Cam

Sensor

Holder

E,

F

Sensor

LI

P-M7

e@

£3

signal

The

E3

signal

is

a

signal

to

detect

the

size

and

the

presence

or

ab-

sence

of

a

disc.

In

the

tone

arm

lead-in

operation,

if

the

E3

signal

is

generated

(changes

from

a

L-voltage

level

to

a

H-voltage

level)

(in

this

case,

the

input

port

No.

4

of

the

microcomputer

changes

from

a

H-voltage

level

to

a

L-voltage

level)

when

the

A,

B

and

C

sensors

are

generating

the

respective

signals

as

depicted

within

the

zones

(A)

®)

and

©

shown

in

Fig.

2-3,

the

respective

disc

sizes

of

30cm,

25cm

and

17cm

are

selected.

After

the

E3

signal

has

been

generated

within

the

zones@,®)and©

shown

in

Fig.

2-3,

the

tone

arm

stops

moving

horizontally

and

down

when

the

A

sensor

generates

a

L-voltage

level

signal

(in

this

case,

the

input

port

No.

26

of

the

microcomputer

changes

to

a

H-voltage

level)

or

a

H-voltage

jevel

signal

(in

this

case,

the

input

port

No.

26

of

the

microcomputer

changes

to

a

L-voltage

level).

Further,

in

the

case

where

no

E3

signal

is

generated

within

the

zones@,®

and

©

it

is

determined

that

there

is

no

disc

on

the

turntable.

@

F2

signal

Being

different

from

the

E2

and

E3

signals,

the

F2

signal

is

a

signal

to

indicate

that

the

F

sensor

detects

a

lead-over

groove

when

the

stylus

is

tracing

a

music

ona

record

disc.

The

F2

signal

serves

as

follows:

The

fead-over

groove

of

each

music

is

detected

in

the

automatic

music

selection

operation.

In

the

case

where

the

last

music

ona

re-

cord

disc

is

selected,

the

instant

the

last

lead-over

groove

(lead-out

groove)

is

detected,

the

F2

signal

changes

from

a

L-voltage

level

to

a

H-voltage

level

(in

this

case

the

input

port

No.

33

of

the

micro-

computer

changes

to

a

L-voltage

level,

so

that

the

tone

arm

begins

to

return.

Fig.

2-3

Position

Guide

A

SENSOR

B

SENSOR

C

SENSOR

B

SENSOR

|

27

C

SENSOR

|

28

E3

SENSOR

|

4

Selection

Z

Selection

77cm

Zone Zone

Selection

Zone

17cm

Play

30cm

Play

D.

Arm

Servo

Sensor

While

the

stylus

is

tracing

a

music

on

a

disc,

it

is

necessary

for

the

stylus

to

be

in

contact

with

the

disc

at

a

right

angle

to

the

modu-

lated

glooves

formed

in

the

disc.

The

arm

servo

sensor

detects

stylus

inclination

from

a

right

angle

to

the

modulated

grooves,

while

the

stylus

moves

on

a

disc.

The

incli-

nation

angle

of

the

stylus

is

checked

by

a

photo

interaptor

of

the

arm

shaft

bearling

and

two

photo

couplers

(fQ8

and

fQ9).

When

the

stylus

inclines

from

the

right

angle,

the

photocoupler

fQ8

or

fQ9

is

turned

on

according

to

the

direction

in

which

the

stylus

inclines,

in

order

to

activate

the

analog

switch

f1C6.

In

response

to

the

signals

from

the

photocouplers,

the

micromotor

(il)

rotates

clockwise

or

counterclockwise

in

order

to

control

the

tone

arm

so

as

to

be

in

contact

with

the

modulated

groove

at

a

right

angle.

E.

Music

Selection

Sensitivity

Switching

Circuit

The

automatic

music

selection

operation

must

be

accurate,

without

producing

any

positioning

error

when

moving

down

the

tone

arm

onto

a

disk,

even

if

there

are

various

dimensions

in

the

width

of

lead-over

groove.

This

music

selection

sensitivity

switching

circuit

can

adjust

the

sen-

sitivities

of

the

E2

and

F2

signals

at

the

same

time.

As

shown

in

the

block

diagram,

the

reference

voltage

applied

to

the

comparator

is

adjusted

to

three

stages

by

using

a

sensor

sensitivity

selector

switch.

2-4.

Microcomputer

Output

Peripheral

Circuits

A.

Micromotor

control

circuit

1.

Operation

of

tone

arm

horizontally

driving

micromotor

(1)

The

micromotor

operates

according

to

the

tone

arm

up:

or

down-condition

as

follows:

@

Where

the

tone

arm

is

up;

When

the

No.

22

of

the

microcomputer

becomes

a

L-voltage

level,

the

micromotor

(1)

rotates

counterclockwise

to

perform

the

lead-in

operation.

On

the

other

hand,

when

the

No.

23

of

the

microcomputer

becomes

a

L-voltage

level,

the

micromotor

(I)

rotates

clockwise

to

perform

the

lead-out

operation.

@

Where

the

tone

arm

is

down;

When

the

tone

arm

is

in

a

down-state,

the

micromotor

(1)

rotates

clockwise

or

counterclockwise

in

response

to

the

output

signal

from

the

arm

servo

sensor

(fQ8

and

fQ9)

to

control

the

tone

arm.

Further,

when

the

tone

arm

is

down

(in

playing

a

music),

since

the

pins

No.

6

and

No.

12

of

the

analog

switch

become

a

L-

voltage

level,

the

micromotor

(1)

does

not

rotate

in

response

to

the

output

signal

from

the

pins

No.

22

and

No.

23

of

the

micro-

computer.

2.

Operation

of

tone

arm

vertically

driving

micromotor

(I)

When

the

No.

24

of

the

microcomputer

becomes

a

L-voltage

level,

the

micromotor

(I)

rotates

counterclockwise

to

move

the

tone

arm

up

or

down.

If

the

UP/DOWN

key

is

depressed

while

the

tone

arm

is

moving

up

or

down,

the

No.

25

of

the

micro-

computer

becomes

a

L-voltage

level

and,

therefore,

the

micro-

motor

(II)

rotates

clockwise

to

move

the

tone

arm

up

or

down.

B.

33

1/3

and

45

rpm

Automatic

Selection

Circuit

According

to

the

size

of

a

disc,

the

revolution

speed

(33

1/3

or

45

rpm)

of

the

turntable

is

automatically

determined.

When

the

E3

sensor

detects

a

30cm-

(25cm-}

dia.

disc

and

a

17cm-dia.

disc,

the

No.

20

of

the

microcomputer

outputs

a

L-voltage

level

signal

for

the

30cm-

(25cm-)

dia.

disc,

and

a

H-voltage

level

signal

for

the

17cm-dia.

disc.

This

output

signal

is

inputted

to

the

No.

10

of

the

DD

motor

control

IC

(TC

9142P

:

elC1)

via

the

speed

selector

switch

(fS2).

The

turntable

rotates

at

a

speed

of

33

1/3

rpm

when

the

No.

10

of

elC1

is

at

a

L-voltage

level,

and

at

a

speed

of

45

rpm

when

the

No.

10

of

elC1

is

at

a

H-voltage

level.

The

relationship

between

the

speed

selector

switch,

the

record

disc

size,

and

the

revolution

speed

is

listed

in

the

following

table:

SPEED

SELECTOR

RECORD

SIZE

Sw(fS2)

30,

25cm-dia.

|

17cmrdia.

MB8841

No.

20

H

NORMAL

TC9142P

No.

10

|

H

Speed

(rpm)

|

wB3e4i

No.

20

INVERSE

TC9142P

No.

10

Speed

(rpm)

C.

DD

Motor

Control

Circuit

If

the

START/STOP

switch

is

depressed

when

the

turntable

stops,

a

L-voltage

level

signa!

is

outputted

from

the

No.

19

of

the

micro-

computer

and

is

inputted

to

the

No.

11

of

the

DD

motor

control

IC

(TC9142P),

When

a

L-voltage

level

signal

is

inputted

to

the

No.

11,

the

turntable

rotates.

D.

Music

Selection

Indicator

Circuit

In

the

automatic

music

selection

operation,

the

selected

musics

are

stored

into

the

microcomputer

and

displayed

on

the

indicator.

In

playing

a

music,

the

indicator

light

blinks

as

follows:

When

the

tone

arm

lead-in

operation

stops

in

a

modulated

groove,

the

indicator

light

begins

to

blink

the

instant

a

lead-over

groove

is

detected

(the

F2

signal

changes

from

a

L-voltage

level

to

a

H-voltage

level).

Further,

when

the

tone

arm

stops

in

a

lead-over

groove,

the

indicator

light

begins

to

blink

the

instant

the

micromotor

(II)

stops.

Furthermore,

in

continuously

playing

musics,

the

indicator

light

begins

to

blink

the

instant

a

lead-over

groove

is

detected

(the

F2

signal

changes

from

a

L-voltage

level

to

a

H-voltage

level).

E.

Computer

Operation

Indicator

Circuit

The

output

signal

from

the

No.

17

of

the

microcomputer

turns

on

or

off

the

fQ1,

so

that

the

indicator

light

blinks.

The

indicator

light

blinks

during

the

micromotor

(1)

or

(II)

is

ro-

tating.

However,

in

case

of

such

a

miss-programming

that

only

one

music

number

not

included

in

a

record

disc

is

selected

or

in

case

of

no

record

disc,

the

indicator

blinks

much

faster

then

its

of

normal

operation

after

the

return

operation

begins.

®

MICRO

COMPUTER

Timing

chart

1

AUTO

MUSIC

SELECTION

2-3-5

(30cm,

33

rpm)

MICRO

COMPUTER

MB8841-566M

AUTO

MUSIC

SELECTION

2-3-5(30cm,

33rpm)

MUSIC

SELECTION

(2-3-5)—*LEAD

IN(

1

)—>PLAY2—>

P-M7

F.

Muting

Circuit

The

muting

circuit

is

a

circuit

to

short-circuit

the

output

signal

from

the

player,

where

necessary.

The

muting

operation

is

performed

by

using

the

output

signal

from

the

No.

18

of

the

microcomputer.

1)

tn

the

automatic

disc

size

selection

and

the

UP/DOWN

key

de-

pression,

the

muting

is

off

when

the

tone

arm

is

down,

and

is

on

when

the

tone

arm

is

up.

In

the

automatic

music

selection

operation

(See

Timing

Chart),

the

muting

is

off the

moment

the

tone

arm

moves

down

com-

pletely

after

the

lead-in

operation

(the

micromotor

(Il)

stops

rotating

counterclockwise).

Further,

when

the

stylus

moves

down

onto

a

modulated

groove,

the

muting

is

off the

moment

the

F

sensor

detects

a

lead-over

groove

(the

F2

signal

changes

from

a

H-voltage

level

to

a

L-

voltage

level).

2

—

G.

Computer

Editing

Circuit

In

the

same

way

as

in

the

muting

circuit

of

the

player,

the

computer

editing

operation

is

performed

by

connecting

the

output

signal

from

the

No.

18

of

the

microcomputer

to

the

pause

circuit

of

a

cassette

tape

recorder

through

a

AND

circuit.

This

circuit

controls

the

recording

on-or-off

operation

on

the

cassette

tape

recorder

side

in

accordance

with

the

automatic

operation

on

the

player

side.

in

other

words,

when

the

muting

on

the

player

side

is

on

(the

No.

18

of

the

microcomputer

is

at

a

L-voltage

level),

the

pause

on

the

cassette

deck

side

is

on;

when

the

muting

on

the

player

side

is

off

(the

No.

18

is

at

a

H-voltage

level),

the

pause

on

the

cassette

deck

side

is

off.

Tess

Ie

Parmer

eee

ST

ARSENE

|

INPUT/OUTPU

No.

—PLAY3—>CUT

(UP/DOWN)

->PLAYS—>LEAD

OUT

Iga

LTO

FTA

Oo

pat

A

<=

|

ES

Ra

|

26

BS

Rs

27

c

Re

|

28

U

R7

|

29

SENSOR

}|——+——_]

D

|

Re

|

30

is

E2

|

Tc

|

8

—

&

E3

IRQ

4

30cm

Selection

UP/DOWN

SW.

_|

Ris,

K2|

35,

40

}

tL

Ube

Hoown

Ris,

K2|

37,

MUSIC

2."

[Risse

92,40:

_

oa

eae

a

SELECTION}

3

|Ris,

K:|

37,39

|

Sw.

7

5

Ria,

Ko]

36,

38

ey

a

Se

BZ

y

|

a)

MOTOR(I)

|

cow

|

Ro

|

22

||

MICRO.

|

cw

|

R

25

i

MOTOR

(II)

iz

|

(|

(Lifter)

CCW

|}

Ra

24

OOWN

uP uP

DOWN

uP

bb

START

BOWN

5

[DDMOTOR

Jerop

|

Os

|

19

ia

|_|

2

MUTING

Os

|

18

ON

OFF

Fon

[FL

ow

_|

OFF

ON

SPEED

33/45rpm.

|

Or

|

20

L

bet

nee

P|

io)

bee

ss

§@H

Weems

TT

——

ee

2

SELECTION

Pe

|

il

[n/n

i

3

ar)

ERE

P-M7

@

MICRO

COMPUTER

Timing

chart

2

AUTOMATIC

RECORD

SIZE

DETECTOR

(17cm,

45

rpm)

AUTOMATC

RECORD

SIZE

DETECTOR

MICRO

COMPUTER

MB8841-566M

(izem

--45rpne)

St

ta

|

Arm

Rest

INPUT/OUTPUT

PORT

|PIN No.)

17cm

LEAD

IN-PLAY->REPEAT—>CUT—

RETURN

Point

AB

Ra

26

|

27

28

SENSOR

17cm

Selection

17cm

Selection

[

START/STOP

SW

|Ko.

Rial

38,

34

T

REPEAT

SW

Ka,

Ria|

41,

35

Ri

Micro

Motor

(I

)

LEAD

IN

Micro

Motor

(II

)

(Lifter)

SPEED

33/45rpm

REPEAT

IND.

DD

MOTOR

$ct8T

OUTPUT

Lighted

®

MICRO

COMPUTER

Timing

chart

3

MANUAL

RECORD

SIZE

DETECTOR

(17cm,

45

rpm)

MANUAL

RECORD

SIZE

DETECTOR

MICRO

COMPUTER

MB8841-566M

(17em_

45rpm)

INPUT/OUTPUT

PORT

|PINNo.)

17cm

LEAD

IN(MANUAL)—>PLAY—>

CUT

PLAY>LEAD

OUT—

RETURN

Re

28

R7

29

Re

30

SENSOR

IRQ

4

7cm

Selection

START/STOP

SW

|

Ko,

Ri2j

38,

34

UP/DOWN

SW

Ka,

Ris}

40,

35

MANUAL

<4

SW

Ki,

Ri3|

39,

35

MANUAL

®

SW

Ko,

Ri3|

38,

35

Micro

RETURN

Motor

(I

)

Micro

R3

Motor

(II

)

(Lifter)

[oo

moToR

Eis

MUTING

SPEED

33/45rpm

3.

ADJUSTMENTS

Note:

Before

adjustments

of

3-1

and

3-2,

remove

the

arm

rest

only.

3-1.

Adjustment

of

Automatic

Disk

Size

Selection

Operation

(See

Figs.

3-1,

3-3

and

3-4)

1)

By

using

30cm

size

record,

actually

carry

out

the

automatic

disk

size

operation

(lead-in

operation).

Adjust

the

lead-in

adjusting

cam

(See

Fig.

3-4)

by

the

tone

arm

placed

on

the

arm

rest

(the

Position

@

as

shown

in

Fig.

3-3

so

that

the

stylus

tip

may

come

down

to

the

position

(the

lead-in

groove

position)

146

mm

away

from

the

disk

center

(See

Fig.

3-1).

By

using

17cm

size

record,

actually

carry

out

the

automatic

disk

size

operation

(lead-in

operation).

Confirm

that

the

stylus

tip

may

come

down

to

the

lead-in

groove

position.

i)

—

Fig.

3-1

Cartridge

wer

Disc

Pea

es

46mm

3-2.

Adjustment

of

Automatic

Music

Selection

Operation

(See

Figs.

3-2,

3-3

and

3-4)

@

Required

disc

and

measuring

instruments

1)

Tester

(DC

voltmeter)

Input

impedance:

50kohm/V

or

more.

(The

higher,

the

better)

2)

A

vinyl

chloride

record

disc

without

grooves

or

with

wider

lead-

out

spiral

than

usual.

3)

Arule

with

graduation

marks

starting

from

the

edge.

A.

Tone

Arm

Height

Adjustment

Adjust

the

stylus

and

disk

as

shown

in

Fig.

3-2,

by

rotating

the

tone

arm

height

adjusting

screw

(See

Fig.

3-4)

to

the

position

@)

as

shown

in

Fig.

3-3.

(Stop

the

stylus

at

a

position

about

130

mm

away

from

the

disk

center.)

Fig.

3-2

wi

Disc

without

grooves

Disc

with

grooves

!

eceereyeUuN

|

Lead-out

groove

Fig.

3-4

Tension

Adjusting

Screw

Make

two(2)

turns:

around

this

P-M7

B.

Sensitivity

adjustment

of

E

and

F

sensor

1.

Setting

At

the

tone

arm

position,

in

case

of

a

record

disc

without

grooves,

stop

the

stylus

at

a

position

about

10

cm

away

from

the

disc

center.

In

case

of

a

record

disc

having

grooves,

stop

the

stylus

above

the

flat

surface

nears

10

cm

away

from

the

disc

center.

2.

How

to

adjust

(See

Fig.

3-3,

Top

View

on

Page

8)

a)

Connect

the

DC

voltmeter

across

the

test

terminal

E

and

G

(ground)

and

then

adjust

the

voltage

to

DC

1V

by

rotating

the

volume

(fVR1)

<E

sensor

adjustment>

Connect

the

DC

voltmeter

across

the

test

terminal

F

and

G

(ground)

and

then

adjust

the

voltage

to

DC

1V

by

rotating

the

volume

(fVR2)

<F

sensor

adjustment>

Note:

When

adjusting

both

the

sensors

with

the

stylus

stopped

on

a

lead-over

groove

of

an

ordinary

record

disc,

note

that

there

is

a

difference

in

detection

position

between

E

sensor

(leading

sensor)

and

F

sensor.

b

—

C.

Level

adjustment

of

F2

signal

1.

Setting

Set

the

stylus

in

the

same

way

as

described

under

Section

2,

and

then

move

the

tone

arm

downward.

(Check

that

the

stylus

stays

ona

lead-over

groove.)

2.

How

to

adjust

(See

Fig.

3-3,

Top

View

on

Page

8)

a)

Connect

the

DC

voltmeter

across

test

terminal

Fz

and

G

(ground)

and

then

adjust

the

voltage

to

DC

1V

by

rotating

the

volume

(fVR3).

Fig.

3-3

Tone

Arm

Height

Adjusting

Screw

Lead-In

Adjusting

Screw

Test

Terminal

Arm

Servo

Adjusting

Cam

Sensor

Holder

Fastening

Bolt

‘Tone

Arm

Height

Adjusting

Screw

Lead-In

Adjusting

Cam

P-M7

D.

Delay

adjustment

of

E,

signal

1.

Setting

Use

the

record

disk

in

which

many

musics

(about

seven

music

tracks)

are

recorded,

and

select

three

music

tracks

having

lead-over

grooves,

respectively,

near

positions

70mm,

100mm,

and

130mm

away

from

the

disc

center.

2.

Adjustment

(See

Fig.

3-5,

Top

View

on

Page

8)

Perform

the

respective

lead-in

operations

for

three

selected

music

tracks,

and

adjust

the

operations

by

rotating

the

volume

(fVR4)

as

shown

in

Fig.

3-3

so

that

the

stylus

comes

down

on

or

a

little

before

the

lead-over

grooves

for the

three

music

tracks.

If

the

volume

(fVR4)

is

rotated

clockwise,

the

lift-down

position

of

the

stylus

is

shifted

inward.

Note:

In

the

lead-over

grooves

existing

on

a

70mm-or-less

from

the

center,

the

misplacing

of

the

arm

in

detection

position

occurs

inevitably.

Fig.

3-5

Cartridge

Disc

5/4

3

2)

!

7,6

Jom

——--|

10cm

13cm

Note:

Remove

the

cabinet

before

adjustments

of

3-3

and

3-4.

How

to

remove

the

cabinet.

(See

Top

View

on

Page

8)

Unscrew

seven

cabinet-mounting

screws

on

the

bottom

of

the

chassis,

Remove

the

E-ring

fixing

the

turntable

to

the

spindle

of

the

motor.

3)

Remove

the

player

case

cover.

4)

Move

the

tone

arm

to

the

player

case

cover

Position

by

depress-

ing

the

MANUAL

key

(

4

),

before

removing

the

cabinet.

3-3.

Arm

Servo

Adjustment

(See

Fig.

3-4,

Fig.

3-6)

A.

Setting

1)

Move

the

tone

arm

leftward

and

stop

it

within

the

record-play-

able

range

by

depressing

the

MANUAL

key

(

>

).

2)

Move

the

tone

arm

downward

by

depressing

the

UP/DOWN

key.

B.

Adjustment

1)

Loosen

the

sensor

holder

fastening

bolt,

and

adjust

the

arm

servo

adjusting

cam

so

that

the

tone

arm

does

not

move

in

either

direc-

tion,

in

the

state

where

the

tone

arm

is

in

the

down

position.

-e@

—

2

—

2)

After

adjustment,

check

that

the

voltage

across

the

connector

terminals

No.

9

or

TP6

and

GND

of

S-0107

(across

the

terminals

of

the

micromotor

(I)

is

within

OV

+1V

when

the

sensor

holder

fastening

hexagon

bolt

is

fastened.

3)

Check

that

the

tone

arm

will

not

move

in

either

direction

when

the

UP/DOWN

key

is

depressed

repeatedly.

Fig.

3-6

Arm

Servo

Adjusting

Cam

Sensor

Holder

Fastening

Bolt

3-4.

Tension

Adjustment

of

Tone

Arm

Horizontally

Driving

Wire

(See

Fig.

3-4)

Move

the

tone

arm

by

depressing

the

MANUAL

key

and

adjust

the

tension

adjusting

screw

so

that

the

wire

does

not

slip

along

the

driv-

ing

gear.

Note:

Care

must

be

taken

not

to

fasten

the

tension

adjusting

screw

too

tightly.

®

Variable

resistors

in

the

DD

motor

control

circuit

The

variable

resistors

(eVR1,

eVR2

and

eVR3)

in

the

DD

motor

control

circuit

are

used

for

adjusting

wow

and

flutter.

These

variable

resistors

have

already

been

adjusted

accurately

before

shipped,

be-

cause

a

special

measuring

instrument

is

required

for

adjustment.

Therefore,

when

the

motor

is

required

to

be

replaced

by

a

new

one

because

of

irreqular

rotation,

replace

the

motor

assembly

and

all

(Stock

No.

18022201).

4.

OTHER

PARTS

Parts

List

<Front

View>

Parts

No.

Stock

No.

Description

=

18026401

Tone

Arm

Ass’y

with

Cartridge

SV-S303

2

13110600

Stylus,

SN-S303

3

13103900

Arm

Rest

4

13105000

Control

Plate

5

18025401

Push

Knob

Ass‘y

(1)

5-1

Mounting

Plate,

push

knob

5-2

13099700

Push

Knob,

START/STOP

5-3

13099800

Push

Knob,

MANUAL,

UP/

DOWN,

REPEAT

6

13100000

Slide

Knob,

SPEED,

SENSITIVITY

7

18025501

Push

Knob

Ass’y

(2)

7-1

Mounting

Plate,

push

knob

7-2

13089800

Push

Knob,

CLEAR,

music

selection

1

~

7

8

13099900

Push

Knob,

POWER

8-1

Knob

Holder

9

13099210

Turntable

Platter

10

13099110

Turntable

Sheet

41

13012300

EP

Adaptor

12

13112000

Dust

Cover

Ass’y

13

13113600

Side

Hinge

(L)

14

13113700

Side

Hinge

(R)

15

13113800

Hinge

Cap

16

13115100

Screw,

M2.6

x

8

13097300

Insulator

Note:

Parts

without

Stock

Nos.

are

not

supplied

even

parts

names

are

listed

in

the

parts

list.

Parts

List

<Top

View>

Parts

No.

Stock

No.

Description

1

38004700

Power

Supply

Cord

2

39106000

Strain

Relief

3

13062500

Output

Cord

4

39105700

Strain Relief

5

46170400

Jack,

computer

editing

6

13097910

Wire

7

13097400

Pipe

(S)

8

13088300

Pulley

(B)

9

13106000

Pipe

(L)

10

13106200

Pipe

Holder

11

18022201

SSD-1

DD

Motor

Ass‘y

with

control

circuit

board

S-0097

12

15005801

Power

Transformer

07204700

Slide

Switch,

voltage

selector

ome

orem

4-1.

Front

View

a

>

pa

f

‘\

oe

Auto

Moe

Guide

6)

®

8)

Auto

Mechanism

Ass

(II

(See

of

Exploded

View

Auto

Mechanism

Ass’

y)

Auto

Mechanism

Ass

y(1)

(See

of

Exploded

View

Auto

Mechanism

Ass

y)

P-M7

5.

EXPLODED

VIEW

OF

MECHANISM

Ass’y

&

PARTS

LIST

5-1.

Auto

Mechanism

Ass’y

(I)

Mechanism

Chassis

Parts

List

<®~@0>

Parts

No.

Stock

No.

Description

1

46176300

Micro

Motor

2

55029810

Rubber

Cushion

3

13103800

Beit

(B)

4

00436500

Pan

Head

Screw,

M2

x

4

5

13098100

Shaft

Guide

(B)

6

13134200

Warm

Shaft

Ass‘y

(B)

7

13122300

Binding

Head

Deltite

Screw,

M3

x

6

8

11602700

Micro

Switch

9

13127800

Binding

Head

Tapping

Screw,

M2

x

12

10

13103700

Lifter

Cam

1

13098910

Lifter

Plate

12

13115200

Slot

Type

Set

Screw,

M3

x

10

13

51825000

Thrust

Washer,

FT3

14

00489000

E

Type

Washer,

D2

Parts

No

Stock

No.

Description

15

13111600

Compression

Spring

16

13097800

Sensor

Holder

17

Sensor

Circuit

Board,

S-0113

18

00421300

Pan

Head

Screw

M2.6

x

6

19

13111500

Tension

Spring

(2)

20

51830000

CS-Type

Washer,

M2

21

00466500

Plane

Washer,

M4

22

00469700

Spring

Washer,

M3

23

51626500

Hexagon

Head

Screw,

M3

x

6

24

00466700

Plane

Washer,

M4

25

00469800

Spring

Washer,

M4

26

00463800

Hexagon

Nut,

M4

27

13096810

Position

Guide

28

51625100

Pan

Head

Tapping

Screw,

M3

x8

29

13111400

Tension

Spring

(1)

30

51830000

CS-Type

Washer,

M2

Sansui P-M7 Manuel utilisateur

Manuels Platine populaires d'autres marques