Panasonic Rs-736us User manual

AIO

ER

NO.

ARD-7007062

MODEL

RS-736US

h

tn

i"

ail

|

ft

wail

ll

lout

Tu

il

hin

4

TRACK

STEREO

TAPE

DECK

WITH

3

HEADS

AND

WIDE

FREQUENCY

RESPONSE

SPECIFICATIONS

Power

Source:

AC

:

120

volts

60

Hz

MODEL

RS-736US

Frequency

Response:

20~32,000

Hz

at

15

ips

Power

Consumption:

Approx.

50

W

Sosa

oo

ae

im

saa

ie

Motor:

4

poles

synchronous

with

center

floating

Wow

&

Flutter:

Below

0.09%

at

15

ips

motor

Recording

System:

AC

bias

200

kHz

Below

0.09%

at

7-1/2

ips

Below

0.13%

at

3-3/4

ips

Erasing

System:

Track

System:

Tape

Speeds:

Maximum

Reel

Size:

Signal-Noise

Ratio:

Fast

Forward

Time:

Rewind

Time:

AC

Inputs:

2

“MIC”

inputs

20KQ

plese

2

"PHONO-1”

inputs

1MQ

4

track

2

channel

system

2

“PHONO-2”

inputs

47

KQ

2 2

:

2

“AUX-1”

inputs

250

KQ

aie

15,

7-1/2

and

3-3/4

ips

2

“AUX-2”

inputs

50KO

7

Outputs:

2

“LINE

OUT-1”

outputs

1V

53

dB

or

mo

2

“LINE

OUT-2”

outputs

lV

ae

7

1

“HEADPHONE”

output

55

mV

Less

than

150

seconds

for

7"

standard

Record/Playback

tape

(1200

ft)

Connector:

CES

standard

Less

than

175

seconds

for

7”

standard

Dimensions:

17”

(W)

x

8-1/2”

(H)

x

18-1/2”

(D)

tape

(1200

ft)

Weight:

33

Ibs

MATSUSHITA

ELECTRIC

CORP.

OF

AMERICA

Pan-Am

Bidg.,

200

Park

Ave.,

New

York,

N.Y.

10017

320

Waiakamilo

Road

Honolulu,

Hawaii

96817

40

Ronson

Drive,

Rexdale,

Ont.

MATSUSHITA

ELECTRIC

OF

HAWAII,

INC.

MATSUSHITA

ELECTRIC

OF

CANADA

LTD.

LOCATION

OF

PARTS

®@®

®®©

©

@®

Supply

Reel

Table

@

Head

Cover

@®

Tape

Speed

Selector

knob

@®

Capstan

®

Takeup

Reel

Table

®

Pressure

Roller

@

Right

Tension

Arm

Cue

Lever

®

Function

knob

Output

Adjustment

Controls

@

NFD

Switch

@

Tape

Selector

@)

Monitor

Changeover

Switches

Power

Switch

@

Echo

Switch

Sound-on-Sound

Channel

Changeover

Switch

@

Sound-on-Sound

Switch

Sound-on-Sound

&

Echo

Adjustment

Control

Equalizer

Changeover

Switch

UX-2

Input

Level

Adjustment

Control

UX-1

Input

Level

Adjustment

Control

IC

(Phono)

Input

Level

Adjustment

ontrol

put

Changeover

Switch

icrophone

Jacks

eadphone

Jack

ecording

Input

Indicator

Lamps

U

Meter

Zero-point

Adjustment

Screws

U

Meters

Recording

Level

Controls

Record

Buttons

6)

Tape

Counter

&

Reset

Button

Guide

Roller

83)

Left

Tension

Arm

6)

Phono-1

(X’TAL)

Input

Jacks

@)

Phono-2

(MAG)

Input

Jacks

AUX-1

Input

Jacks

@)

AUX-2

Input

Jacks

68

Line

Out-1

(FIX)

Jacks

@)

Line

Out-2

(VAR)

Jacks

Record/Playback

Connector

@

Ground

Terminal

@

Power

Socket-A

@

Power

Socket-B

@

Power

Cord

(120

V,

60Hz)

@

Tape

Guides

a)

Tape

Cleaner

4)

Shut-off

Lever

@)

Erase

Head

@

Recording

Head

6)

Tape

Shifter

Fig.

1

6)

Playback

Head

PANASDNIG:

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8®

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2 ©

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@

(=

DISASSEMBLY

INSTRUCTIONS

HOW

TO

REMOVE

PANEL

(A)

(G)

(H)

(I)

(B)

(1)

1.

Remove

Tape

Speed

Selector

Knob

(A),

4

Control

and

Function

Knob

(H).

Knobs

(B)

and

6

Knobs

(C).

3.

Remove

8

Pane!

Holding

Screws

(1)

and

take

out

2.

Remove

3

Jack

Holding

Nuts

(D),

Guide

Roller

(E),

2

Panel.

Head

Cover

Holding

Screws

(F),

Pressure

Roller

(G)

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HOW

TO

REMOVE

BODY

CASE

1.

Remove

8

Body

Case

Holding

Screws

(J).

|

2.

Remove

the

Body

Case

slowly

lifting

it.

MECHANICAL

PRESSURE

OF

PRESSURE

ROLLER

As

the

Pressure

Roller

is

pressed

against

the

Capstan,

the

Capstan

rotation

is

transmitted

to

the

Tape

between

Pressure

Roller

and

Capstan.

But

when

pressure

of

the

Pressure

Roller

against

the

Capstan

is

insufficient,

slip-

ping

occurs

and

the

Capstan

rotation

is

not

conveyed

smoothly.

Therefore,

this

pressure

should

always

be

kept

moderate.

Given

hereunder

are

the

measurement

and

adjustment

methods.

Measuring

Method:

Instruments

Required:

Spring

Scale,

Strong

Thread

1.

Thread

the

Tape

and

place

the

set

into

the

Playback

mode.

2.

Make

a

loop

of

the

thread

and

hook

the

Pressure

Roller

Shaft

to

the

Spring

Scale

with

it.

3.

Pull

the

Spring

Scale

slowly

along

the

straight

line

between

the

Pressure

Roller

Shaft

and

the

Capstan

2kg

Full

Scale,

Spring

Scale

NOTE:

Pull

it

along

the

extension

of

a-o

ADJUSTMENTS

Shaft,

and

read

the

value

on

the

Spring

Scale

when

the

Tape

stops

running

or

when

the

Pressure

Roller

moves

away

from

the

Capstan.

4.

The

standard

pressure

(value

on

the

Spring

Scale)

is:

(1.3~1.7

kg)

NOTE:

The

Capstan

and

the

Pressure

Roller

should

be

in

parallel.

If

they

are

not

in

parailel,

the

Tape

moves

up

and

down

between

the

Pressure

Roller

and

the

Capstan,

or

only

a

side

of

the

Tape

is

tensioned.

The

adjustment

is

made

by

correct-

ing

the

bent

Pressure

Roller

Shaft.

Adjusting

Method:

Make

the

adjustment

by

use

of

elongation

and

contrac-

tion

of

the

Pressure

Roller

Lever

Spring.

Measure

pressure

of

the

Pressure

Roller

and

check

if

it

satisfies

the

specified

value.

(Fig.

4)

Pressure

Roller

Fig.

4

Make

the

adjustment

by

use

of

elongation

and

contraction

|

of

the

Pressure

Roller

Lever

Spring.

(Fig.

5)

(Playback

Head)

(Capstan

Shaft)

|

Tape

Shifter

|

L

Pressure

Roller

Lo

|

H

(Record

Head)

(Erase

Head)

—~U

Bend

the

Angle

of

the

Spring

Hook

and

effect

the

adjustment

Record

Pad

(Pressure

Roller

Lever)

Playback

Pad

Fig.

5

(nudaunaneedunsanvensspuaeeneneseenepenussueneasennsauascesnsaenneausnnaeKenasenauneessnnesndunsuWunernsenasenanessaesmmenausuuegenaaneneanNnuORnnnneNuuserennnecusonenursnunennanaenumannannunusenenencuunmnanaunuaarensanKNaaneoneseuaeny

TAKEUP

TENSION

DURING

RECORD/PLAYBACK

OR

FAST

FORWARD

Though

the

Capstan

rotates

and

the

Tape

runs,

the

Tape

3.

Place

the

set

into

the

Playback

mode.

(If

the

Takeup

is

not

taken

up

if

takeup

torque

is

too

small.

Especially

Tension

of

Fast

Forward

is

to

be

measured,

place

the

when

this

torque

is

small,

the

Tape

loosens

and

when

set

into

the

Fast

Forward

mode.)

Allow

the

Gauge

too

big,

the

Tape

is

elongated

or

broken.

Therefore,

to

follow

the

taking

up

force.

When

the

value

on

takeup

torque

should

be

controlled

suitably.

the

Tension

Gauge

becomes

constant,

read

the

graduation.

Repeat

this

procedure

several

times

and

take

an

average.

Measuring

Method:

4.

Conduct

the

measurement

with

the

Tape

fully

wound

Instruments

Required:

Tension

Gauge,

Splicing

tape

on

the

7”

Reel.

The

standard

Takeup

Tension

should

1.

Place

a

full

reel

of

7”

Tape

on

the

Takeup

Reel

Table

be:

and

make

a

loop

of

the

Tape

end

by

using

Splicing

Takeup

Tension

during

Recording/Playback

Tape.

(25~35

gr)

2.

Hook

the

Tension

Gauge

to

the

loop

of

Tape

end

and

Takeup

Tension

during

Fast

Forward

unreel

about

30”

of

Tape.

(more

than

140

gr)

i

In

Normal

Forward

:

Operation

|

Splicing

Tape

Fig.

6

Takeup

Reel

Table)

~—-(Takeup

Reel

Table

Pulley

(2))

Reel

Table

Felt

:

|

(Takeup

Reel

Table

Pulley

(1)

(Friction

Spring

prt

|

Ged

iA

te

pa

YA

Ye

LOT

gg

2

Fig.

7

Friction

Spring

—_—

Fig.

8

Adjusting

Method:

For

Recording/Playback,

adjustment

is

done

by

using

the

Friction

Spring

which

is

under

the

Takeup

Reel

Table

Pulley.

For

too

strong

Takeup

Tension

.........

Turn

the

Friction

Spring

counter-clockwise

(viewed

from

below)

to

de-

crease

the

tension.

For

too

weak

Takeup

Tension

.........

Turn

the

Spring

POPE

CEES

TTL

EE

TELL

LLL

Leet

tite

Oo

ELLE

iE

a

nia

a

iid

BRAKE

POWER

ADJUSTMENT

Left

Reel

Weak

Power

|

Direction

;

Right

Reel

Fig.

9

clockwise

to

increases

the

tension.

The

takeup

tension

may

increase

or

decrease

when

the

Reel

Table

Shaft

is

out

of

oil

or

the

Friction

Washer

gets

stained

with

oil.

In

Fast

Forward

the

Felt

between

the

Reel

Table

Pulleys

may

get

stained

with

oil

or

dust,

lowering

the

takeup

tension.

The

standard

conditions

are

obtained

by

wiping

off

the

stains

completely.

Strong

Power

Direction

Abnormal

tension

may

sometimes

be

applied

to

the

tape

if

the

brake

fails

in

timing.

It

is,

of

cource,

necessary

to

provide

sufficient

brake

power

to

stop

the

tape,

but

it

is

all

the

more

necessary

to

pay

attention

to

the

timing.

Specified

Value:

Strong

Power

Direction

100~250g8

Weak

Power

Direction

40~70¢g

The

difference

in

brake

power

between

the

strong

power

direction

and

weak

power

direction

should

be

more

than

100

g.

(One

side

Strong

Power

Direc-

tion,

and

the

other

side

Weak

Power

Direction)

Measuring

Method:

Instruments

Required:

Tension

Gauge,

Splicing

Tape

Suspend

a

tension

gauge

from

the

end

of

the

7”

Reel

Tape

in

the

stop

mode,

pull

it

and

read

the

average

value

for

a

turn

of

the

Reel.

(Fig.

9)

Brake

power

differs

according

to

the

reel

table

rotating

direction,

viz.,

either

clockwise

or

counter-clockwise.

Therefore,

the

measurement

should

be

taken

in

both

cases.

Left

Reel

Table

Brake

Rod(1)

Fig.

10

Right

Reel

Table

Pulley(1)

Adjusting

Method:

Make

the

adjustment

by

use

of

elongation

and

contrac-

tion

of

the

Right

and

Left

Brake

Springs.

(Fig.

10)

Brake

Timing:

During

FF

or

PLAY

mode,

brake

should

be

SA

een

ee

a

nee

deen

nme

RGRER

AREA

SORA

RERR

Re

nRHER

AHR

ARN

ON

RON

SRETORNOR

ESE

REN

ARR

ead

eon

Ree

ERRE

NORE

ROSRHOEReEsREAeedEenensonnen:

applied

earlier

on

the

Supply

Ree!

side

than

the

Takeup

Ree!

side.

The

reverse

applies

during

the

REW

or

REVERSE

mode.

non

RonaDa

SE

seRnnenuenennsessenneensasuaunnnESennnennaaesansnaennnnnenenn

eke

nODRGRRGESRRARHAHREOEESEMERMAnannnenneanons

BACK

TENSION

DURING

RECORD/PLAYBACK

OR

FAST

FORWARD

Back

Tension

has

a

relation

to

Tape

Driving

Power

of

the

Capstan.

Too

high

or

too

low

Back

Tension

exerts

bad

effect

on

tape

speed

and

increases

wow

and

flutter,

preventing

the

Tape

from

running

smoothly.

Back

Ten-

sion

should

therefore

be

adjusted

carefully.

Measuring

Method:

Instruments

Required:

Tension

Gauge,

Splicing

Tape

1.

Place

a

full

reel

of

7”

Tape

on

the

Supply

Reel

Table.

While

unreeling

theTape,

make

the

measurement

in

the

same

way

as

for

measurement

of

takeup

tension

during

Recording

Playback.

2.

When

the

Tape

is

fully

wound

on

the

7”

Reel,

the

standard

Back

Tension

is:

Back

Tensien

during

Recording/Playback

:

10~25

ger

Back

Tension

during

Fast

Forward:

10~25

gr

Adjusting

Method:

1.

If

Back

Tension

is

high:

The

Supply

Reel

Table

Shaft

is

dirty

or

is

out

of

oil

or

stain.

2.

|f

Back

Tension

is

low:

The

tension

of

Rewind

Belt

or

of

Counter

Belt

is

too

low.

Therefore,

it

should

be

replaced.

TAKEUP

TENSION

AND

BACK

TENSION

DURING

REWIND

Instruments

Required:

Tension

Gauge,

Splicing

Tape

1.

In

order

to

measure

the

Takeup

Tension,

place

a

Tull

reel

of

7”

Tape

on

the

Supply

Reel

Table

and

place

the

set

into

the

Rewind

mode.

Then

measure

it

in

the

same

way

as

for

measurement

Takeup

Tension

during

Record/Playback.

2.

In

order

to

measure

the

Back

Tension,

place

a

Tull

reel

of

7”

Tape

on

the

Right

Reel

Table

and

place

the

set

into

the

Rewind

mode.

Then

measure

it

in

the

same

way

as

for

measurement

during

Record/Play-

back.

3.

Tekeup

Tension

and

Back

Tension

during

Rewind,

when

the

Tape

is

fully

wound

on

the

7”

Reel,

are

as

follows:

PAD

PRESSURE

An

excess

of

Pad

Pressure

exerts

a

subtle

influence

on

tape

speed

wow

and

flutter,

and

abrasion

of

head.

On

the

contrary,

too

low

pad

pressure

brings

about

bad

Mesuring

Method:

Instrument

Required:

Tension

Gauge

1.

Place

the

set

into

the

Playback

mode

without

loading

the

Tape.

2.

Apply

the

Tension

Gauge

to

the

center

of

the

Pad

and

move

the

Pad

away

from

the

Head

slowly.

Read

the

value

when

it

first

separates.

3.

The

standard

Pad

Pressure

is:

Pad

Pressure

during

Recording/Playback:

20~30

gr

Pad

Pressure

for

Erasing:

15~25

gr

Adjusting

Method:

Adjust

the

Pad

Spring

(in

order

to

increase

the

Pad

Pressure)

Takeup

Tension

during

Rewind:

more

than

100

gr

Back

Tension

during

Rewind:

5~12

gr

As

amatter

of

course,

the

Tape

Reel

must

be

of

the

maximum

diameter

applicable

to

the

set.

Adjusting

Method:

If

the

Takeup

Tension

is

too

low,

the

causes

might

be

either

low

Rewind

Belt

tension

insufficient

Rewind

Pulley

pressure,

lack

of

oil

on

the

Supply

Reel

Table

Shaft,

oil

on

the

Belt

and

the

Motor

Pulley,

etc.

It

the

Back

Tension

is

abnormal,

the

causes

might

be

either

that

the

Spring

under

the

Takeup

Reel

Table

Shaft

is

dirty

or

needs

oil.

A

nPaneneneeeu

penne

Deennennanssanepas

ee ne

nnnHeauananansrsounsneueuneuesunonsnanasaunRERaaDan

Denn

xUnuuaueraeesernanenens

contact

between

Head

and

Tape,

and

also

deteriorates

sensitivity

and

frequency

response.

Attention

should

therefore

be

paid

to

this

Pad

Pressure.

(Tape

Pad)

Pad

Pull

it

t

upward

ay

Bend

it

\

Pad

Spring

(In

order

to

lower

the

Pad

Pressure)

Pull

it

downward

Fig.

13

HEAD

ADJUSTMENTS

ADJUSTING

ORDER

Head

Height

|

Sus

|

Playback

Head

Azimath

|

4

|

Record

Head

Azimath

HEAD

HEIGHT

Erase

Record/Playback

Head

Slit

for

;

0.015~0.24

(0~0.01)

+0

6.25

——»

(6.22)

Tape

Guide

3

(HET)

@

o

Fig.

15

1.

Regarding

the

rerative

positions

of

Head

and

Tape,

the

Record

and

Playback

Heads

so

that

they

become

the

Erase

Head

Core

should

be

so

adjusted

as

to

ca.

O~0.01

interior

from

the

tape.

come

out

about

0.015~0.24mm

from

the

Tape.

2.

The

adjustments

are

effected

with

Screws

@~®@.

This

is

usually

conducted

by

use

of

transparent

tape

The

Screw

@

should

be

mainly

used

for

the

purpose.

and

observing

with

the

named

eye.

Likewise

adjust

AZIMATH

ADJUSTMENT

PLAYBACK

HEAD

1;

Connect

a

VTVM

to

the

LINE

OUT

terminal

of

each

channel.

.

By

using

an

Angle

Adjusting

Standard

Tape

(7-1/2

ips,

7

kHz),

playback

7

KHz

signals

at

7-1/2

ips

tape

speed

and

turn

the

Adjusting

Screws

@

and

@

shown

in

Fig.

15

so

that

the

max.

output

is

obtained

at

both

channels.

In

case

it

is

difficult

to

adjust

the

slit

angle

between

CH-1

and

CH-2,

seek

for

the

middle

point.

(The

measuring

circuit

is

shown

in

Fig.

16)

RECORD

HEAD

AS

Adjust

its

angle

after

adjusting

the

Playback

Head

Angle.

.

Connect

a

Standard

Oscillator

to

the

AUX

IN

terminal

of

each

channel

and

a

VTVM

to

the

LINE

OUT

terminal.

.

Keep

the

oscillation

frequency

at

15~20kHz

and

the

recording

level

lower

by

10

dB

than

the

standard

recording

level,

and

place

the

unit

in

the

RECORD

mode.

.

Record

the

specified

signal

with

the

Record

Head

while

playing

it

back

with

the

Playback

Head,

and

Playback

Amplifier

adjust

the

Record

Head

Adjusting

Screws

©

and

©

so

that

each

output

becomes

maximum.

NOTE:

At

this

time,

do

not

adjust

the

Playback

Head.

(The

measuring

circuit

is

shown

in

Fig.

17)

Cautions

in

Measurement:

Move

finely

the

Adjustment

Screws

@

and

©,

@®

and

@

alternately.

*

After

the

adjustment,

lock

the

screw

heads

with

lacquer.

Recording

Amplifier

Playback

\

b-—=

Amplifier}

(VTVM

Panasonic RS-736US User manual

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