Teac X-7RMKII Manuale utente

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TEAC.

SERVICE

MANUAL

X-FR

oll

X-Fi

Stereo

Tape

Deck

X-7R

oO

/X-7ucl

1

SPECIFICATIONS

AND

SERVICE

DATA

SPECIFICATIONS

Track

System

%-track,

2-channel

stexeo

Head

System

X-7RMKII:

6

heads:

forward

erase,

forward

record,

reverse

playback,

forward

playback,

reverse

record,

reverse

erase.

X-7MKII:

3

heads:

erase,

record,

playback

Reel

Size

7”

Tape

Speed

19cm/s

(7-%

ips)

and

9.5cm/s

(3-%

ips)

Inputs

(level

and

impedance)

MIC:

Specified

input

level:

—G0dB

(0.775mV)/10kohms

Min.

input

level:

~70dB

(245nV)

LINE

IN:

Specified

input

level:

—12dB

(195mV)/50kohms

Min.

input

level:

—22dB

(61.5mV)

Outputs

(level

and

impedance)

OUTPUT:

Specified

output

level:

—5dB

(436mV)/10kohms

Max.

output

level:

+1dB

(0.869V)

PHONES:

Specified

output

level:

—24dB

(48.9mV)/8o0hms

Playback

Equalization

19em/s:

3,180us

+

50us

(NAB),

3,180us

+

35ys

(EE)

9.5em/s:

3,180us

+

90us

(NAB),

3,180us

+

50us

(EE)

Motors

Capstan

motor:

DC

brush

motor

with

FG

servo

Reel

motor:

2

DC

slotless

motors

Bias

Frequency

100kHz

Operating

Position

Vertical,

horizontal,

angled

Power

Requirements

100/117/220/240V,

AC

50/60Hz,

77W,

72W

for

X-7MKII

(General

export

model)

220V

AC

50Hz,

77W,

72W

for

X-7MKI

(Europe

model)

240V

AC

50Hz,

77W,

72W

for

X-7MKI]

(U.K./Australia

model)

117V

AC

60Hz,

77W,

72W

for

X-7MKII

(U.S.A./Canada

model)

Weight

18kg

(38-11/16

Ibs.)

net

aera

rt

196mm

(7-3/4)

270mm

___|

(10-5/8"')

h———

461mm

(18-3/16'")

—-—

454mm(17-7/8"")

384mm(15-1/8"")

——+]

411mm(16-3/16"")

——

—)

Saad

OO

co

Oe

+-——

369mm(14-9/16"")

=

Dashed

line

indicates

General

Export

Models

for

Limited

Areas.

Fig.

1-1

Dimensions

SERVICE

DATA

MECHANICAL

Tape

Speed

Deviation

3,000Hz

+

30Hz

Tape

Speed

Drift

15Hz

FWD/RED

Tape

Speed

Differential

(X-7RMKII

only)

30Hz

Wow

and

Flutter

Playback:

0.05%

(WRMS),

0.10%

(RMS)

at

19cm/s

0.07%

(WRMS),

0.12%

(RMS)

at

9.5cm/s

Record/Playback:

0.12%

(RMS)

at

19cm/s

0.15%

(RMS)

at

9.5cm/s

Pinch

Roller

Pressure

1.35kg

~

1.9kg

(3.0

Ibs

~

4.2

Ibs)

Reel

Torque

Play

mode:

Take-up

260

+

40g-cm

(3.1

~

4.20z-inch)

Back

tension

180

+

40g-cm

(1.9

~3.10z-inch)

Fast

winding

mode:

Take-up:

1100g-cm

(15.30z-inch)

Back

tension:

50g-cm

(0.70z-inch)

Brake

Torque

Forward

direction:

800

~

1400g-cm

(11

~

190z-inch)

Reverse

direction:

500g-cm

(6.90z-inch)

or

less

Left/right

deviation:

200g-cm

(2.80z-inch)

or

less

Fast

Winding

Time

150

seconds

or

less

for

550m

(1800

feet)

Pitch

Control

Standard

tape

speed

+6%

or

more

FWD/REV

Change

Time

(X-7RMKII

only)

3.5

sec.

+0.5

sec.

TIMER

Activate

Time

4

sec.

+2

sec.

ELECTRICAL

Frequency

Response

Playback:

See

Fig.

3-5

to

3-6

Overall:

See

Fig.

3-7

to

3-8

Signal

to

Noise

Ratio

Playback:

50

dB

min.

(19

cm/s,

LH)

52

dB

min.

(19

cm/s,

EE)

49

dB

min.

(9.5

cm/s,

LH)

52

dB

min.

(9.5

cm/s,

EE)

48

dB

min.

(19

cm/s,

LH)

50

dB

min.

(19

cm/s,

EE)

46

dB

min.

(9.5

cm/s,

LH)

50

dB

min.

(9.5

cm/s,

EE)

68dB

min.

at

1kHz

(measured

with

input

10dB

higher

than

the

specified

input

level)

Channel

Separation

50dB

min.

at

1kHz

Adjacent

Track

Crosstalk

40dB

min.

at

125Hz

<

Total

Harmonic

Distortion

0.8%

or

less

at

1kHz

Overall:

Erase

Efficiency

e

Improvements

may

result

in

SPECIFICATIONS

AND

SER-

VICE

DATA

changes.

e

Value

of

“dB”

in

the

data

refers

to

OdB

(0.775V),

except

where

specified.

AParts

marked

with

this

sign

are

safety

critical

components.

They

must

always

be

replaced

with

identical

components

—

refer

to

the

TEAC

Parts

List

and

ensure

exact

replacement.

X-7R

vc

D/X-7ucll

2

MECHANICAL

ADJUSTMENTS

AND

CHECKS

NOTE:

All

the

explanations

are

for

the

X-7RMKII.

But

unless

specified

they

can

also

be

applied

to

the

X-7MKIL

except

for

those

in

relation

to

the

REVERSE

direction.

2-1

CONTROL

PCB

ASSY

CHECK

Hooking

CONTROL

PCB

ass’y

as

shown

facilitates

this

check.

CONTROL

PCB

ass’y

TA-1030

Fig.

2-1

2-2.

BRAKE

ADJUSTMENT

NOTE:

The

explanation

and

figure

in

this

paragraph

are

for

the

left

side

brake,

similar

checks

and

adjustments

are

applicable

for

the

right

side

one.

1.

Adjust

by

moving

the

brake

band

bracket

in

either

direction

(arrow

(A))

so

that

the

reel

motor

chassis

is

in

parallel

with

the

brake

arm,

and

so

that

the

brake

band

makes

proper

clearance

equally

all

around

the

reel

table

base.

2.

Adjust

by

moving

the

brake

solenoid

in

either

direction

(arrow

(D))

so

that

the

stroke

of

the

solenoid

plunger

is

about

2mm.

3.

Adjust

by

moving

the

band

ass’y

retaining

plate

as

shown

in

(B,

C,

E)

so

that,

when

the

plunger

is

pushed

in

the

direction

of

the

solenoid

housing,

the

reel

table

base

is

not

rubbed

by

the

brake

band

and

is

properly

spaced.

solenoid

plunger

reel

motor

chassis

N

:

@

G

zk,

pang

KP

agar

we

brake

arm

brake

band

brake

solenoid

solenoid

mounting

screws

ve

band

ass’y

retaining

plate

TA-103

Fig.

2-2

2-3

BRAKE

TORQUE

MEASUREMENT

1.

Place

an

empty

7”

reel,

connected

to

a

spring

scale

by

a

string,

on

the

reel

table.

2.

Pull

the

scale

away

from

the

reel

and

read

the

scale

indication

only

when

the

reel

table

is

steady

motion.

3.

Do

steps

1

and

2

for

each

measuring

condition,

(A)

through

(D)

in

Fig.

2-3.

4.

The

values

are

as

chart

in

Fig.

2-3.

>

tee]

spring

scale

----

—c—

——

1

'

'

force

Ss

oh

3

X\]

Cham

?

TA-1032

Forward

direction

(B)

(C)

|

800

to

1400g-cm

(11

to

190z-inch)

Reverse

direction

(A)

(D)

|

500g-cm

(6.90z-inch)

or

less

Left/right

deviation

|

200g-cm

(2.802-inch)

or

less

NOTES:

1.

The

reverse

direction

values

are

reference.

2.

The

specification

of

left/right

deviation

only

applies

for

forward

direction

torques.

Torque

calculating

formulas:

(1)

Torque

(in

g-cm

or

02-inch)

=

Force

or

Weight

(in

g

or

oz)

x

Radius

(in

cm

or

inch)

(2)

Conversion

of

g-cm

to

oz-inch:

g-cm

x

0.0139

=

oz-inch

Fig.

2-3

X=7R

uD

X-7ux

2-4

REEL

MOTOR

TORQUE

MEASUREMENT

1.

Hold

both

left

and

right

tension

arms

in

the

upper

position

using

rubber bands.

2.

See

Fig.

2-4,

Measure

torques

for

each

operating

mode

with

the

conditions

specified

in

the

chart.

3.

Since

all

the

torque

values

are

reference

values,

it

is

allowable

that

the

take-up

torque

during

the

fast

forward

or

rewind

mode

is

tkg-cm

or

more,

and

that

the

back

tension

torque

during

these

mode

is

good

unless

the

left

or

right

tension

arm

are

shut-

off.

4,

There

is

no

specially

provided

adjustment,

so

if

any

torque

cor-

rection

are

needed,

repair

or

replace

defective

part(s)

and/or

circuit(s).

i

Cc

D

q

:

t

spring

scale

|

—_—~

>

——_—_

ow

radius

TA-1033

Reel

torque

reference

value

Play

mode

Mode

Torque

Take-up:

(B)

in

REV

260

+

40g-cm

(3.1

~

4.20z-inch)

(D)

in

FWD

Back

tension:

(A)

in

FWD

180

+

40g-cm

(1.9

~

3.10z-inch)

L

(C)

in

REV

Fast

winding

mode

Mode

|

Torque

Take-up:

(B)

in

REW,

(D)

in

F.F.

1100g-cm

(15.30z-inch)

Back

tension:

(A)

in

F.F.,

(C)

in

REW

|

50g-cm

(0.70z-inch)

NOTE:

For

torque

calculation,

refer

Fig.

2-3.

Fig.

2-4

2-5

PINCH

ROLLER

PRESSURE

STROKE

ADJUSTMENT

1.

Set

the

deck

in

the

forward

or

reverse

play

mode.

2.

Adjust

by

turning

the

pressure

storke

adj.

nut

(Fig.

2-5)

so

that

the

clearance

between

the

pin

and

the

stopper

cushion

is

about

1.0mm.

3.

Since

the

clearance

is

produced

at

one

side

(left

or

right),

ad-

justment

for

this

side

only

is

permissible.

=

d

_

P

=

se

7

Top

Panel

Fig.

2-5

Pinch

roller

pressure

stroke

adjustments

left

capstan

right

capstan

teft

right

pinch

roller

pinch

roller

if

m

@

©

AS

7

ue

TA-1035

stopper

cushions

about

1.0

mm

Either

the

left

or

right

should

have

a

clearance

of

about

1.0mm.

Fig.

2-6

2-6

PINCH

ROLLER

PRESSURE

MEASUREMENT

NOTES:

1.

The

explanation

below

applies

to

both

the

left

and

right

pinch

rollers,

2.

Both

pinch

roller

pressures

are

automatically

set

with

equal

value.

1.

Hold

both

the

left

and

right

tension

arms

in

the

upper

positions

using

rubber

bands,

string

etc.

2.

Set

the

deck

in

either

play

mode

with

no

tape

loaded.

3.

Attach

the

spring

scale

to

the

pinch

roller

as

shown

in

the

figure.

4.

Draw

the

pinch

roller

away

from

the

capstan

shaft

(in

the

direction

of

a

line

intersecting

the

centers

of

the

capstan

shaft

and

the

pinch

roller)

until

the

capstan

shaft

and

the

pinch

roller

are

separated.

5.

Return

the

scale

back

until

the

pinch

roller

just

begins

to

turn.

The

scale

should

then

be

reading

as

follow.

Reference

value:

1.35kg

to

1.9kg.

(3.0

Ibs

to

4.2

Ibs)

6.

If

the

reading

is

out

of

specification,

replace

defective

part(s).

There

are

no

adjustable

parts.

spring

scale

TA-1036

Fig.

2-7

2-7

TENSION

ARM

HEIGHT

ADJUSTMENT

1.

Thread

any

standard

tape

on

the

deck

using

a

standard

empty

reels

such

as

TEAC

RE-702.

2.

Set

the

deck

in

the

forward

or

reverse

play

mode.

3.

Stop

left

(right)

guide

roller’s

rotation

by

hand.

Adjust

by

turning

the

left

(right)

tension

arm

adjusting

nut

(refer

Fig.

2-8)

so

that

the

tape

moves

in

the

center

of

the

guide

roller.

right

tension

arm

spring

spring

hook

capstan

motor

X=7RcO/X-7vcll

4.

Release

the

guide

roller.

Fine-adjust

the

adjusting

nut

again

until

there

is

no

tape

curling

at

the

tape

guide

pin

between

the

erase

head

and

the

left

(right)

guide

roller.

5,

After

adjusting

the

height

of

both

left

and

right

tension

arms,

check

that

the

tape

running

condition

is

good

by

repetition

of

fast

forward

and

rewind

modes.

6.

If

the

tape

running

position

is

different

when

the

guide

roller

stops

and

when

it

turns,

the

condition

when

the

guide

roller

is

rotating

has

priority.

2-8

TENSION

ARM

FORCE

ADJUSTMENT

NOTE:

The

description

below

applies

to

both

left

and

right

sides.

1.

Check

the

shut-off

switch

operates

correctly

with

the

deck

in

the

horizontal

and

vertical

positions.

2.

Adjustment

can

be

done

by

changing

the

hooking

position

of

the

tension

arm

spring

against

the

spring

hook.

2-9

DAMPER

FUNCTION

CHECK

NOTE:

The

explanation

below

applies

to

both

left

and

right

sides.

1,

Check

that

the

damper

string

begins

to

function

after

the

tension

arm

has

moved

10

to

15mm

from

the

lowest

position,

while

the

damping

function

is

working,

there

is

a

feeling

of

resistance,

2.

Check

that

the

tension

arm

returns

freely

from

the

above

posi-

tion

to

the

lowest

position.

left

tension

arm

spring

shut-off

switch

spring

Deo

damper

string

right

tension

arm

right

tension

arm

adj.

nut

TA-1037

damper

string

a

left

tension

arm

ZY

secre

aster

slower

left

tension

arm

adj.

nut

Fig.

2-8

Tension

arm

height,

tension

arm

force,

damper

function,

and

tape

speed

2-10

REEL

TABLE

HEIGHT

ADJUSTMENT

1.

Adjust

the

tension

arm

height

beforehand.

(See

2-7)

2.

Check

each

reel

table

height

using

a

TEAC

RE-702

empty

reel

and

letting

the

tape

run

in

each

tape

operating

mode.

3.

If

the

tape

rubs

against

the

ree!

flanges,

adjust

the

reel

table

height

by

means

of

the

two

reel

table

mounting

screws.

standard

empty

reel

&

=

Seas

\

Glyn

reel

table

Ta-

1038

Fig.

2-9

X-7RuW/

X-7ucll

2-11

REVERSE

SOLENOID

ADJUSTMENT

(X-7RMKII

ONLY)

1.

When

the

reverse

solenoid

releases,

if

the

slide

plate

hits

the

stopper

screw/s

noisily,

the

solenoid

stopper

plate

may

be

ad-

justed

in

the

direction

of

the

solenoid

housing.

See

illustration.

Parts

below

are

accesible

from

the

rear

of

the

amplifier

chassis.

Loosen

slide

plate

solenoid

stopper

plate

stopper

screws

BEFORE

reverse

solenoid

Fix

after

adjustment

TA-1039

—_

0.5

mm

max.

Adjustment

range

is

0.5mm

max.

in

solenoid-off

condition.

Fig.

2-10

2-12

ROTATING

PART

THRUST

CLEARANCE

CHECKS

Reference

values

Capstan

shaft:

0.1mm

to

0.25mm

(magnefloat

type)

Guide

roller:

0.05mm

to

0.3mm

Tension

arm

guide

roller:

0.05mm

to

0.3mm

Reel

motor:

0

(spring

type)

Tension

arm:

0

(spring

type)

NOTE:

Since

the

capstan

shaft

is

a

magnefloat

type,

check

that

it is

forced

towards

the

rear

of

the

deck

while

rotating.

2-13

CAPSTAN

MOTOR

REPLACEMENT

7.

When

the

capstan

motor

is

replaced,

install

it

with

its

lead

wires

and

washers

as

shown.

2.

Check

that,

when

the

deck

is

operated

by

repeating

the

forward

and

reverse

play

modes,

the

capstan

drive

belt

changes

position

on

the

flywheels

smoothy.

Fig.

2-11

2-14

TAPE

SPEED

ADJUSTMENT

FREQUENCY

COUNTER

OSCILLATOR

DECK

under

TEST

LINE

IN

iw

T.403

Fig.

2-12

NOTES:

1.

Conduct

all

the

following

in

both

forwar

and

reverse

play

modes.

2.

When

ordering

test

tapes,

allow

for

the

longer

delivery

time

that

is

required

for

them.

1.

Connect

a

frequency

counter

to

either

OUTPUT

terminal.

2.

Load

a

TEAC

YTT-2003

test

tape.

Set

the

SPEED

switch—

HIGH,

and

PITCH

CONT

knob-OFF.

3.

Play

the

tape.

Adjust

R18

(see

Fig.

2-8)

for

a

reading

of

3,000

Hz

+5Hz,

4,

Check

the

following

at

the

beginning

and

the

end

of

the

tape.

Specifications:

Tape

Speed

deviation.............0.

3,000Hz

+30Hz

Tape

speed

drift...

.

0...

0...

ee

eee

ee

eee

15Hz

FWD/REV

tape

speed

differential

.

.30Hz(X-7RMKII

only)

5.

Change

the

test

tape

toa

TEAC

YTT-2002,

and

SPEED

switch

setting

to

LOW.

6.

Repeat

steps

3

through

4.

Adjust

R17

if

necessary.

7.

Pull

the

PITCH

CONT

knob

out.

Set

SPEED

switch

HIGH.

Play

a

YTT-2003

tape.

8.

Check

if

the

speed

variation

of

at

least

3,000Hz

+180Hz

is

ob-

tained

when

the

PITCH

CONT

knob

is

rotated

fully

in

both

directions.

9.

Change

the

test

tape

to

YTT-2002,

SPEED

switch

setting

to

LOW.

Repeat

step

8.

2-15

WOW

AND

FLUTTER

CHECKS

NOTES:

1.

All

the

following

apply

to

both

forward

and

reverse

play

modes.

2.

The

following

measurements

should

be

made

at

the

beginning

and

the

end

of

the

tape.

3.

When

ordering

test

tapes,

allow

for

the

longer

delivery

time

that

is

required

for

them.

Playback

1.

Connect

the

test

equipment

to

the

deck

as

shown

in

Fig.

2-12.

2.

Load

and

play

a

TEAC

YTT-2003

test

tape

for

HIGH

speed

(19cm/s

or

7-%

ips),

or

a

TEAC

YTT-2002

test

tape

for

LOW

speed

(9.5cm/s

or

3-%

ips).

3.

Read

the

indication

on

the

wow

and

flutter

meter.

Specifications:

HIGH

speed:

0.05%

WRMS

0.10%

RMS

LOW

speed:

0.07%

WRMS

0.12%

RMS

Overall

4.

Load

a

TEAC

YTT-8013

test

tape

(blank).

Apply

and

record

a

3,000Hz

signal.

‘

5.

During

simultaneous

tape

monitoring

(playing)

the

recorded

signal,

read

the

wow

and

flutter

meter

display.

Specifications:

HIGH

speed:

0.12%

RMS

LOW

speed:

0.15%

RMS

X=7R

vx

D/

X-Fi

2-16

VOLTAGE

CONVERSION

(FOR

GENERAL

EXPORT

MODELS)

Always

disconnect

the

power

line

cord

before

making

these

adjust-

ments,

Frequency

Conversion

Since

the

X

series

uses

DC

motors,

frequency

conversion

is

not

necessary.

Voltage

Conversion

1.

First

remove

the

two

feet

by

removing

the

screws

in

each

one.

2.

Unscrew

the

left

and

right

sides

of

the

cabinet.

3.

Locate

the

voltage

selector

to

the

right

of

the

power

trans-

former

as

seen

from

the

rear

of

the

deck.

4,

Turn

the

slotted

center

post

of

the

selector

with

a

screw-driver

until

the

desired

voltage

numerals

appear

in

the

cut-out

section

of

the

selector.

5.

Replace

the

cabinet

and

feed.

Om

Fig.

2-13

NN

2-17,

LUBRICATION

Oiling

is

needed

after

every

1,000

hours

of

operation

or

once

a

year

if

the

deck

is

infrequently

used.

For

this

purpose,

TEAC

spindle

oil

(from

TEAC

TZ-255

oil

kit),

Mobil

D.T.E.

Oil

Light,

etc

are

re-

commended.

Lubrication

is

normally

not

necessary

except

at

the

points

shown.

1.

Place

the

deck

in

the

horizontal

position.

2.

Apply

a

few

drops

of

oil

to

the

respective

spindles

shown,

ex-

cluding

capstans,

then

spread

the

oil

evenly

on

the

spindle

sur-

faces

using

a

cotton

cloth,

etc.

3.

For

capstans,

apply

a

few

drops

to

the

indicated

position.

4.

After

oiling

all

the

points,

leave

the

deck

for

1

to

2

hours

until

the

oil

is

thoroughly

absorbed.

Figure

shows

left

side.

Do

also

for

right

side.

tension

roller

guide

roller

pinch

roller

S

oP

capstan

X=7R

vc

/

X-Fi

2-18

HEAD

AND

TAPE

PATH

ALIGNMENTS

NOTES:

1.

Head

and

tape

path

alignment

are

the

same

for

the

Head

adjustment

screws

X-7RMKLI.

and

X-7MKII.

The

procedure

for

the

X-

7RMKIL

is

given

below

Erase

Record

and

playback

2.

For

detailed

alignment

principles,

refer

to

the

book

Fixed

screws

@

Azimuth

“Audio

Fundamental

-TAPE

DECK-,

8.

Mechanical

(not

adjustable)

©

Height

and

tilt

Adjustments”

published

by

the

TEAC

CORPORA-

®

Tangency

TION.

2-18-1

HEAD

ARRANGEMENT

(for

X-7RMKI)

eS

oo

28

58S

Oo

Oo

eo

Q

Tape

guide

pin

adjustment

nut

Forward

Forward

Reverse

Forward

Reverse

Reverse

Erase

Record

mp.

Playback

Playback

_9

Record

Erase

Tape

guide

pins

Fig.

2-15

Head

arrangement

2-18-2

HEAD

REGULATION

ELEMENTS

2-18-3

ALIGNMENT

PROCEDURE

(for

X-7RMKII)

1.

Visually

adjust

the

tilt

of

each

record

and

playback

head

so

that

the

head

surface

is

parallel

to

the

nearest

tape

guide

pin.

2.

Make

coarse

azimuth

adjustments

for

the

record

and

playback

heads

by

viewing

each

head

from

in

front

(without

tape).

3.

Running

a

TEAC

YTT-8013

test

tape

(thickness

=

35

wm)

in

the

forward

direction,

fine-adjust

the

height

of

the

left

tention

Adjust

each

head

to

satisfy

each

of

the

following:

TILT

The

head

surface

should

be

parallel

to

the

tape

guide

pin

surface.

za

AZIMUTH

roller

so

that

the

lower

edge

a

the

tape

is

just

touching

ie

.

Parar

Gittins

lower

edge

of

the

tape

guide

pin

(1),

See

Fig.

2-17,

then

adjust

The

gap

of

the

head

core

should

be

perpendicular

«=z

|

:

eee

to

the

tape

travel

:

Cl

the

height

of

the

tape

guide

pin

(2)

so

that

the

upper

edge

of

;

the

tape

is

in

contact

with

the

upper

edge

of

the

tape

guide.

HEIGHT

Confirm

that

the

adjustments

do

not

cause

the

tape

to

curl.

—!

—

4.

Confirm

that

the

forward

erase

head

core

protrudes

0.1

mm

The

upper

(lower)

core

of

the

head

should

be

level

Bae

. :

:

—

above

the

moving

tape.

if

not,

replace

the

head

with

another

with

the

upper

(lower)

edge

of

the

tape.

L_

|

one

and

recheck.

TENOENE

Te

ou

yyee

a

me

fag

nae

The

dotted

line

should

be

perpendicular

to

the

ae:

ore

aad

a

clade

pay

:

surface

of

the

tape.

Fig.

2-16

Head

regulation

elements

X=7RvcD/

X-7vcll

8.

Loosen

the

two

screws

holding

the

reinforcement

plate,

then

adjust

using

the

correction

jig

(TEAC

P/N

5736000100)

as

shown

in

Fig.

2-19.

Note:

(1)

Use

the

jig

as

near

as

possible

to

the

pinch

roller

spindle.

(2)

Do

not

touch

the

surface

of

spindle.

(3)

Use

no

other

tool

for

this

adjustment!

Fig.

shows

the

forward

erase

head.

Slight

space

Correction

jig

(TEAC

P/N

5736000100)

«<

*

y|

im

Correction

jig

Reinforcement

plate

screws

Tape

guide

pin

(1)

Forward

erase

head

intor

p

NOTE:

In

the

case

of

the

reverse

erase

head,

the

tape

should

be

in

contact

with

the

lower

surface

of

the

Reinforcement

plate

tape

guide

pin

(4).

Fig.

2-17

Erase

head

height

Pinch

roller

spindle

6.

Check

for

any

tape

curling

at

either

tape

guide

pin

in

the

closed

loop

portion

of

the

tape

(i.e.,

between

the

capstans).

7.

If

there

is

any

tape

curling

at

tape

guide

pin

(2)

during

forward

play,

do

the

following:

Unthread

the

tape

from

the

front

of

the

head

assembly.

Remove

both

pinch

rollers.

Set the

deck

in

the

play

mode.

Then

visually

align

the

pinch

rofler

spindle

with

the

capstan

as

described

below.

Fig.

2-19

Pinch

roller/capstan

alignment

Fig.

shows

left

side.

9.

If

the

tape

curls

at

tape

guide

pin

(3)

in

reverse

play,

correct

in

the

same

way

(steps

7

and

8).

.

10.

After

it

is

entirely

corrected

that

there

is

no

tape

curling

condi-

tion

in

the

head

assembly,

fine-adjust

each

record

and

playback

height

so

that

the

brass-colored

spacer

of

forward

(reverse)

Pinch

roller

spindle

is

tilted

to

the

left

Left

pinch

roller

+

Tape

curling

direction

purpose

head

will

show

above

(below)

the

moving

spindle

Left

capstan

: .

—

.

observed

here

tape.

(About

as

thick

as

a

thin

pencil

line).

Adjustment

should

in

the

forward

be

done

by

equally

turning

three

screws

required

correction

Tape

|

|

|

|

play

mode.

not

to

disturb

tilt

and

azimuth

regulation

conducted

before.

11.

Finally,

if

necessary,

make

rough

tangency

adjustment

of

re-

spective

head

with

tape

running.

Forward

record

head

Tape

guide

pin

(2)

If

the

pinch

roller

spindle

is

tilted

to

the

left

(right)

with

respect

to

the

capstan

shaft,

tape

curling

may

occur

at

the

upper

(lower)

edge

of

the

tape

guide

pin

(2).

Fig.

2-18

Example

of

improperly

aligned

pinch

roller

and

capstan

X=-7R

oc

O/X-Aucll

3

ELECTRICAL

ADJUSTMENTS

AND

CHECKS

ADJUSTMENT

AND

TEST

POINT

LOCATIONS

tours

of

9

@0te8

;

9

|

*

o,

+

+

>

bo)

*

eed

4

Ee.

8

:

*

Le

ssve®

@e

g

E

R501/R601

Playback

level

(FWD)

R514/R614

Record

level

(FWD)

R502/R602

Play

back

level

(REV)

R513/R613

Record

level

(REV)

R503/R603

Playback

EQ

(HIGH

FWD)

|

R516/R616

Record

Bias

EE

(FWD)

4

R504/R604

Playback

EQ

(HIGH

REV)

R515/R615

Record

Bias

EE

(REV)

|

R505/R605

Playback

EQ

(LOW

FWD)

|

R517/R617

Record

Bias

LHI

(FWD)

R506/R606

Playback

EQ

(LOW

REV)

R518/R618

Record

Bias

LHI

(REV)

R507/R607

Output

level

L102/L202

Bias

trap

(record)

R508/R608

VU

meter

(playback)

L

£103/L203

Record

EQ

(FWD)

i

R509/R609

|___VU

meter

(monitor)

j___

£104/L204

Record

EQ

(REV)

_|