Teac V-970X Manual de usuario

TEAC

SERVICE

MANUAL

V-970X/R-919X

STEREO

CASSETTE

DECK

V-970X/R-919X

1

SPECIFICATIONS

Track

System

4-Track,

2-Channel

Stereo

Heads

R-919X

4:

2

Erase,

1

Record

and

1

Playback

(Rotary)

V-970X

3:

1

Erase,

1

Record

and

1

Piayback

(Combination)

Type

of

Tape

Cassette

tape

C-60

and

C-90

(Philips

type)

Tape

Speed

4.76

cm/sec.

(1-7/8

ips)

Motors

3:

1

OC

Servo

motor

(for

capstan

drive)

1

DC

motor

(for

reel

drive)

1

DC

motor

(for

ancillary

control)

Wow

and

Flutter

(WRMS)

0.03

%

(R-919X),

0.025

%

(V-970X)

Frequency

Response

(Overatl)

—20

dB

20

—

21,000

Hz

Metal

Tape

(25

—

20,000

Hz

+3

dB)

20

—

20,000

Hz

CrO,

Tape

(25

—

19,000

Hz

+3

dB)

20

—

18,000

Hz

Normal

Tape

(25

—

17,000

Hz

+3

dB)

Signal-to-Noise

Ratio

(Overall)

60

dB

(3%

THD

Level,

Weighted)

70

dB

(Dolby

B

In,

over

5

kHz),

80

dB

(Dolby

C

In,

over

1

kHz),

92

dB

(dbx

In,

at

1

kHz)

Dynamic

Range

110

dB

(dbx

in,

1

kHz

Peak

Level)

Fast

Winding

Time

Approximately

100

seconds

for

C-60

NOTES:

Improvements

may

result

in

SPECIFICATIONS

changes.

Value

of

“dB”

in

the

data

refers

to

0

dB

(0.775

V),

except

where

Specified.

CAUTION

+t.

Parts

marked

with

this

sign

are

safety

critical

components.

They

must

always

be

replaced

with

identical

components

—

refer

to

the

appropriate

parts

list

and

ensure

exact

replace-

ment.

e

Dolby

Noise

Reduction

System

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“Dolby”

and

the

double-D

symbol

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

dbx

Noise

Reduction

system

made

under

license

from

dbx,

Incorporated.

The

name

‘‘dbx”

and

the

dbx

symbol

are

trademarks

of

dbx,

Incorporated.

fi

tk

Inputs

Line:

60

mV,

50k

ohms

Outputs

Line:

0,3

V

for

load

impedance

of

50k

ohms

or

more

Headphones:

8

ohms

Power

Requirements

120/220/240

V

AC,

50/60

Hz

(General

export

models)

120

V

AC,

60

Hz

(U.S.A./Canada)

220

V

AC,

50

Hz

(Europe)

240

V

AC,

50

Hz

(U.K./Australia)

Power

Consumption

27

W

Dimensions

(W

x

H

x

D)

435

x

123.5

x

279.5

mm

(17-1/8"

x

4-7/8"

x

11")

471

x

123.5

x

279.5

mm

(18-9/16"

x

4-7/8"

x

11")

(V-970X,

with

side

panel)

Weight

5.9

kg

(13.01

Ibs)

net,

6.6

kg

(14.55

Ibs)

net

(V-970X,

with

side

panel)

@

Specifications

were

determined

using

metal

tape

except

as

noted.

©

Improvements

may

result

in

specifica-

tions

or

features

changing

without

notice.

@

Photos

and

illustrations

may

differ

slightly

from

production

models.

iz

1.

HHEISKBOED,

PSK

REFSCEMHVUET.

2.

KVIAP

IMO

OGBld0.775V

CHEE

CTOETF.

i=

AMIEL

E

ABI

CH,

IRS

SWAY

SS

4

Py

DHF

EO

MW

ARH

TSC

RA,

eRULE-—U

fT

ZUFFDVSALVVATAlS,

KILE

HR

FED

OE

EHEIC

IRD

ERLE

SNTOES.

eKIVDE—RU

OO1k,

KIDEC

EPR

O

FSR

TT.

@dbx

Hk

Udbx

V—Viddbx

1

VI—WHEL—-Fy

FOE

SRE

TSH.

edbx

PAF

Ald

dbx

1

VI-RL—-Fy

KOR

WIECH

DUTHMSNTOEF.

|

V-970X/R-919X

2

REMOVAL

OF

EXTERNAL

COMPONENTS

HEB

OH

LF

V-970X/R-919X

3

PARTS

LOCATION

3B

an

Bc

im

POWER

SW

PCB

Power

transformer

JOINT

PCB

D

DBX

PCB

SELECTOR

PCB

JOINT

PCB

C

MAIN

PCB

(General

export)

70us

sw

METAL

sw

JOINT

PCB

A

DISPLAY

PCB

FWD

Cassette

sw

REV

JOINT

PCB

B

Rec

safety

sw

Rec

safety

sw

(R-9I9X

only)

Fig.

3-1

Topview

tm

V-970X/R-919X

4

MECHANICAL

ADJUSTMENTS

AND

CHECKS

AM

BBO

EE

&

PER

4-1

PINCH

ROLLER

PRESSURE

4-1

EvF-no-FEBHA

1.

Press

the

cassette

switch

(see

Fig.

3-1)

up

to

set

the

deck

to

1.

HtYK+>

R(yF

(

Fig.

3-1

BR)

SEAHLTIL

the

playback

mode.

4*E-KFETS,

The

cassette

switch

should

be

pressed

up

throughout

measure-

WER,

ALYb

+

AY

FULACMLBGSTCE,

ment.

2.

CVF

+O-F*

P-LRNAREHNIS.

2.

Hang

the

spring

scale

from

the

pinch

roller

arm.

3.

RAE

YF

+

O-SOREMILE

SS

CRROAAKEIEOK

3.

Extend

the

spring

in

the

direction

shown

in

the

figure

until

BR,

CYF

+

O-DMBCE

PT

RZSY

YeThicseMess

the

rotation

of

the

pinch

roller

stops,

then

return

it

gradually

FSRBAKCES.

so

that

the

pinch

roller

comes

into

contact

with

the

capsten

4

bys.

O-SHGORHS

LOWER.

shaft

again.

BURIE

V-970X

F4OPYTH

390

9

~

490

9

4,

Read

the

value

at

the

moment

the

pinch

roller

starts

rotating.

HT5-4

HY

170

9

~

230

g

Standard

values

R-919X

FHD/REV

Lf

380

9

~

480

9

V-970X

Take-up

side

:

390g

—490g

(13.8

oz

—

17.3

oz)

Supply

side

170

g

—

230

g

(6.0

oz

—

8.1

02)

R-919X

FWO/REV

play:

380g

—

480

g

(13.4

oz

—

16.9

02)

R-919X

V-970X

left

pinch

roller

right

pinch

rolier

Supply

side

Take-up

side

BEYF-O-5

Bee

aa?

7978

TIIPITM

Measure

when

in

REV

play

Measure

when

in

FWD

play

REV

1

BRIE

FWOT

TL

7

Bett

ae

Fig.

4-1

Pinch

roller

pressure

measurement

E>

+-O—S/PRHBE

4-2

TAPE

PATH

ADJUSTMENT

4-2

7

-PHEO

ME

Note:

The

following

special

tools

and

tapes

are

required

for

this

section,

Head

check

jig

A

(P/N

5736006600)

Head

check

jig

B

(P/N

5736006700)

MTT-150

test

tape

(for

Dolby

level

calibration)

MTT-356

(or

MTT-256)

test

tape

(for

frequency

response

check)

MTT-902

mirror

tape

(C-90

type)

DECK

under

TEST

R

OUTPUT

AC

Voltmeter

Fig.

4-2

Test

setup

for

azimuth

adjustment

PYVYAZMBEBERK

HE.

COMBETSROMAKOBR,

FAK

F—-THYE

CTH.

Av

biBA

(P/N:

5736006600)

Ay

FieSB

(P/N:

5736006700)

MTT-150

FAR+>F-—TD(PILVE—-

VAI:

Py

RA)

MTT-356

(RIAMTT-256)

FAR

+

F—

TC

BR

BAEHE

TAY

56

FA)

MTT-902

=3—->+-—T

(C-90#!)

O°{in

phase)

45°

90°

135°

180°

(out

of

phase)

inte

x04trAB

WADHD

Fig.

4-3.

Confirming

phase

relationship

4c

48

RAHA

V-970X/R-919X

|

V-970X

Note

1:

When

the

record/playback

head

has

been

replaced,

tighten

%&

1.

&°-

HAY

FARRULEL

SI,

Fig.

4-6

ORD

(A),

screws

(A),

(B),

(C)

shown

in

Fig.

4-6

until

they

stop,

then

slacken

them

by

1-1/2

turns

before

starting

align-

ment.

Note

2:

When

the

erase

head

has

been

replaced,

install

itasshown

i

2.

MAAyY

RAMBLE

LRI,

Fig,

4-67

OLIICRAIS.

in

Fig.

4-6.

1.

Attach

head

position

alignment

jigs

A

and

B,

then

set

the

deck

2.

to

the

play

mode.

2.

Fit

jig

B

on

the

tape

guide

of

the

record/playback

head

as

3.

shown

in

Fig.

4-5,

then

align

the

height

with

screw

(A)

as

shown

in

Fig.

4-6.

3.

Fit

jig

B

to

the

head

as

shown

in

Fig.

4-5

to

check

its

tilt

and

4,

align

it

using

screws

(B)

and

(C)

shown

in

Fig.

4-6.

Then

align

the

height

again

with

screw

(A).

5.

4,

Repeat

alignments

in

procedure

2

and

3

two

or

three

times

to

align

height

and

tilt.

(When

adjusted

to

the

standard

height,

the

head

should

be

under

the

tape

guide.)

6.

5.

Fit

jig

B

to

the

tape

guide

of

the

left

pinch

roller

and

align

the

height

with

nut

(E).

(The

standard

height

is

above

the

tape

guide.)

7.

6.

Play

test

tape

MTT-902,

and

adjust

nut

(E)

so

that

the

lower

edge

of

the

tape

guide

of

the

record/playback

head

is

in

contact

with

the

tape

edge,

but

the

tape

is

not

curled.

7.

Adjust

the

azimuth

of

the

playback

head

with

screw

(C)

shown

in

Fig.

4-6

according

to

item

5-3

(on

page

15).

If

the

screw

is

8.

rotated

by

half

a

turn

or

more,

turn

screws

(A)

and

(B)

by

the

same

amount

then

align

again

from

item

6

to

correct

the

height

of

the

tape

guide

of

the

record/playback

head.

9

8.

Adjust

the

azimuth

of

the

record

head

with

screw

(BD)

shown

‘

in

Fig.

4-6

according

to

item

5-5.

(Refer

to

page

18.)

Screw

(D)

should

not

be

turned

more

than

half

a

turn.

9.

After

alignment

is

complete,

check

that

the

tape

does

not

curl

over

the

tape

guide

by

repeating

play

and

stop

operations.

head

check

jig

A

(5736006600)

head

check

jig

B

(5736006

700)

Fig.

4-4

Height

Adj.

Screw

A

REC

Head

Azimuth

Screw

D

S&MRRY

REC

7YVARERY

Kee

Pie

c

Tilt

Adj.

Screw

B

zimu

crew

;

FIL

RB

RY

P/B?

UV

AMBRY

=e

REC

Head

P/B

Head

BEN»

F

Ben

*F

Fig.

46

(B),

(C)

MIEKSE

THO,

TOMB

STNTHORY

&

1.5

GROSOKRRTHBEMOSCE.

Ny

POMBMBIBR

A,

BARY

BLT

+

E-RKETS.

Fig,

4-4

DAKDKRe

BAYROT-T+

HAKKAR

B

#@MT,

Fig.

4-6

ORD

(A)

CHATHETS.

Fig.

4-5

OFSICBRR

ENYRICMTCFVE

CHERL,

Fig.

4-6

ORY

(B),

(C)

TELE,

BRAY

(A)

T

ASeeeTS.

Lic

2,

3

ROMB*

2~3

DRORL,

BS,

FIVE

CIAB

3S.

(BADBELT-TF

>

HL

KFORMETS)

.

ECYVF

+

0-DOF-T*HA

CBR

BMT,

tFyb

(€E)

CTHACMBIS.

(BAOBHAT-T>HTFOEM

tgd).

FAb+F—-T

MIN-92

LEASH,

R+

BAY

kOT-TF

HI

FORRMAA-VUGWRECBKSASHYb

(E)

&

mes

S.

BENNY

FOPIVA®

5-3

(1

X-YBik

)

Ktto

T

Fig.4-6

ORD

(C)

CHETS.

1/2

GK

EGIL

ERR

ANY

FOT-T

+

HFRS

EEOtSKH,

RY

(A),

(B)

SABELBES

RCROR

BEPOGHT.

REWY

FOV

IVA

5-5

(18

N-VBM)

KitoT

Fig.

4-6

ORY

(0)

THETS.

2Y

(0)

ORBBHIS

1/2

DRUALTS.

BCORBOR,

TU

+

AhyTEROKRL,

T-Te

tit

ECT

-TRA-NWVULBWC

ERR

S.

head

check

jig

B

(5736006700)

head

check

jig

A

(5736006600)

Erase

head

These

should

touch

EMACSE

R-919X

head

check

jig

B

(5736006700)

head

check

jig

A

(5736006600)

START

|”

Erase

Head

Height

Adjustment

(Using

Jigs)

7

FWD

erase

head

REV

erase

head

1,

Connect

the

deck

to

test

equipment

as

shown

in

Fig.

4-2.

REC*PLAY

2.

Insert

the

head

check

jig

A

into

the

cassette

holder.

head

Close

the

halder

then

push

the

jig

in

firmly.

3,

Check,

in

FWD

play*,

height

of

FWD

erase

head‘s

A

c

E F

Db

B

tape

guide

using

head

check

jig

B.

If

needed,

adjust

by

turning

nut

A.

4.

Similarly,

check

REV

erase

head

in

REV

play*.

If

needed,

adjust

by

turning

nut

B.

5.

Repeat

steps

3

and

4

until

both

requirements

are

satisfied.

Fig.

4-7

Head

height

adjustment

*

Pushing

up

the

cassette

switch

(Fig.

3-2),

place

in

play

mode.

Keep

the

switch

pushed

up

during

adjustments.

REC-PLAY

Head

Height

Adjustment

1.

Check,

in

FWD

play*,

height

of

REC*PLAY

head’s

tape

guide

using

head

check

jig

B.

2.

In

REV

play*,

check

it

also.

Replace

spacers

below

screws

C

and

D

with

thinner

(thicker)

ones.

(For

both

C

and

D,

the

same

num-

ber

of

spacers

having

same

thickness

should

be

added

or

substracted).

F

Spacer

[1mm

_|

5800695000

[Spicer

|

02

mm

|

[Spacer

[0:28

mm

|

5800595200__

REC-PLAY

Head

Spacers

*

In

both

FWD

and

REV,

higher

(lower).

Tape

guide

height?

*

In

both

FWD

and

REV,

the

head

check

jig

B

can

just

Bass

smoothly

between

the

edges

of

the

guide.

or

*

Between

FWD

and

REV,

relative

height

is

reversed

(ex.:

higher

in

FWD,

lower

in

REV).

REC-PLAY

Head

Azimuth

Adjustment

1,

Playing

a

MTT-150

tape

in

the

FWD

or

REV

direc-

tion,

check

that

the

phase

relationship

between

L-ch

and

R-ch

is

within

45°.

2.

Playing

10

kHz

section

of

a

MTT-356

or

MTT-256

tape

in

the

forward

direction,

adjust

screw

E

so

that

phase

relationship

becomes

0°.

3.

In

REV

play,

make

the

same

adjustment

with

screw

F,

How

many

degrees

was

screw(s)

in

steps

2

and

3

More

than

45°

turned?

|

Less

than

45°

Tape

Path

Adjustment

Playing

MTT-902

mirror

tape

in

FWO

and

REV,

check

the

following

contents.

4

+

{s

there

tape

curling

at

each

tape

guide?

+

Is

the

head

core

(silver)

of

the

REC-PLAY

head

visible

from

the

tape

edge?

+

Curling

occurred

*

Visible

+

Not

touching

Erase

Head

Height

Adjustment

(Using

Tape}

Using

MTT-902

tape,

correct

by

repeating

tape

guide

height

adjustments

between

FWD

erase

head

in

FWD

play

and

REV

erase

head

in

REV

play.

Adjust

screw

A

for

FWD

erase

head,

screw

B

for

REV

erase

head.

+

No

curling

+

Not

visible

-

Touches

COMPLETED

V-970X/R-919X

R-919X

Av

F@AB

wy

KOS

~y

FRSA

(5736006700)

(5736006600

)

AS—b

FWOR

WAS

vy

F

REVAWaS

yy

F

Wika»

FMS

CEA)

1.

Fig.4-204

91

Fy

$

EMTS.

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FE

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bh:

HUTCAY

KAMAN

TATS.

TATE,

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Kit

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Welty

KATHE.

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WD

RRICREV

JL

1

BEY

CRS

BREVIS

:

ee

DHA

KGET

S,

Fig.

4-7

~v

FS

HE

Weitty

KBE.

5.

340M

SSE

TM

RT.

Ay

he

Af

yF

(Fig.

3-28

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FWD,REV

WEY

CAEL)

BG

>

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FiKSLBIIH

Kiki

RITAS.

Kit

+

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Ti

&

DSO

5

Pr

CA

>

FWDRF

ALY,

REVEFEELY)

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ks

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ER

VE

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tk2,340T

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BET

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L

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St

Peeks.

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Y

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(5

—

SH)

MTT-9027

—J@

Liat

T.,

FWDIL

fia

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BAY

FAT

Ra

ARCREV

IL

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RAY

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HAY

FOOD

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ISAM

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ILLEY

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“4S

4-3

PHOTO

SENSOR

ADJUSTMENT

(R-919X)

1.

Connect

DC

voltmeter

as

shown

in

Fig.

4-8.

2.

Playing,

in

REV

direction,

magnetic

tape

portion

of

test

tape

consists

of

elements

in

Fig.

4-9

(MTT-5551

tape,

etc.),

adjust

R84

so

that

a

voltage

of

3.0

V

is

obtained

at

TP.

3.

In

FWD

play,

similarly

adjust

R83

for

obtaining

a

voltage

of

2.8

V,

4.

Re-check

that

voltage

in

REV

play

does

not

change

from

3.0

V.

5.

Set

AUTO

REVERSE

switch

in

C=

position,

then

play

tape

in

FWD

mode

from

point

A

in

Fig.

4-9.

Check

that

tape

motion

changes

in

REV

play

mode

at

point

B,

then

changes

in

FWD

play

mode

at

point

A.

DC

voitmeter

|

V-970X/R-919X

4-3

Fah

+t

>-t+39%

(R-919x)

1.

2.

DC

MBH

Fig.

4-8

DESKCHEITS.

Fig.

4-9

KCARTBROTAK

+

F-T

(MIT-5511

3)

O

HiT

—-TRAS

REV

TA

CHTAKKES,

IP

OBE

DM

Z.0VCGSES

ROA

LHBITS,

laltklc

FU

PU

4

THETA,

TP

OBER

28V

KGS

£D

R83

ABTS,

REV

FL

BFC

TP

OBER

3.0

V

DSORSAWCLABH

Bag

D.

AUTO

REVERSE

R4YF&

CadWRKCtybhl,

F-7e

Fig.

4-9

DO

ApaAkO

FID

TL

7atts,

T-TH

B

ROWMBT

REV

SUVKRERL,

TOB

AR

OWBNSHE

FW

SUBS

SCLAMRITS,

OC}

R84

(REV)

J

R83

(Fwo)

Fig.

4-8

Photo

sensor

adjustment

(1)

7

4

b

-+2

>

4

BBR!)

splicing

tape

AVG4YvYr7-F-7F

leader

tape

t

YF

F—

7

Magnetic

tape

BAT

-T

splicing

tape

AVIA

YA

F-TF

A

leader

tape

YS

-F-T7F

Fig.

4-9

Photo

sensor

adjustment

(2)

7

+

b

-

tz

>

+

3

8K(2)

V-970X/R-919X

|

10

4-4

REEL

TORQUE

CHECKS

AND

ADJUSTMENTS

1.

Using

a

cassette

torque

meter,

check

that

reel

torque

at

each

tape

transport

operation

is

within

the

following

specified

range.

fe

ee

2

V-970X

R-919X

25

~

60

g-cm

25

~

60g-cm

(0.34

~

0.83

oz-inch)

|

(0.34

~

0.83

oz-inch)

Take-up

(FWD/REV)

0.40

~

0.52

*

.

pee

Fast

Forward/

90

~

160

g-cm

Rewind

(1.25

~

2.22

oz-inch)

*Back

Tension

1.

Connect

a

DC

voltmeter

between

TP.4

and

TP.GND

on

the

main

PC

board.

2.

Play

the

middle

part

of

test

tape

MTT-5511

and

adjust

the

follawing

so

that

the

voltmeter

shows

the

values

in

the

above

table.

V-970X:

R42

R-919X:

R42

(FWD),

R74

(REV)

(Since

R42

and

R74

are

interlocked,

after

adjusting

one,

check

the

other.)

4-5

TAPE

SPEED

ADJUSTMENT

1.

Connect

a

frequency

counter

to

the

deck

as

shown

in

Fig.

4-10.

2.

Playing

the

mid

portion

of

an

MTT-111

test

tape

in

FWD

and

REV

directions,

adjust

the

semi-fixed

resistor

on

capstan

motor

so

that

tape

speed

becomes

3,000

Hz

+5

Hz.

An

insu-

lated

and

non-metallic

flat-head

screwdriver

should

be

used

for

this

adjustment,

3.

In

both

FWD

and

REV

play

modes,

check

that

the

following

values

are

obtained

at

the

beginning

and

at

the

end

of

the

tape.

Deviation:

3,000

Hz

+45

Hz

Width

of

deviation:

Within

30

Hz

4-6

WOW

AND

FLUTTER

CHECKS

Note:

tn

both

FWD

and

REV

play

modes,

these

measurements

should

be

made

at

the

beginning,

middie

and

the

end

of

the

tape.

4-6-1

PLAYBACK

METHOD

1.

Connect

a

wow

and

flutter

meter

to

the

deck

as

shown

in

Fig.

411.

2.

Loada

TEAC

MTT-111

test

tape

or

equivalent

and,

in

FWD

and

REV

directions,

play

it

to

measure

the

wow

and

flutter

value.

3.

Specifications

are

shown

below.

0.05%

WRMS

(V-970X)

0.055%

WRMS

(R-919X)

4-4

YW

hb

ORRRORE

lL

ARy

hE

RIL

-

A-—FICKSMEMAT

HO

MAINT

HDOELLCSHERSS.

25~60

g

>

cm

FAGLEF

eRe

(FHD/REV)

25~60

g

+

cm

0.40~0.

52V

(FHD/REV)

90~1609

-

cm

|

90~~160g

-

cm

enKy

DeFvYary

1.

DC

@BGERt4%

HAIN

PCB

®

TP.4

&

TP.GND

KCeMRTS.

2.

FAb+F—T

HIT-5511

OPRAAEBEL,

BHO

0.

40~0.

56V

FRO

(F.F.,REWSE

)

DEROECSOLA

RBIS.

V-970X

R42

V-919X

R42

(FWD),

R74

(REV)

(

R42

&

R74

SMBHLTTWSOCHASMBLERAI

HHFTOHBITSce.

)

4-5

F-TPREWE

1.

Fig.

4-l0OD

KK

DITIMKRADUY

SET

y

FICS

B.

20

MTT-S

Ab

F—IO

WE

MEFWD.REVENENT

FEEL,

KE

D3,

000Hz

PSHzIC

OK

DIC

Fp

DAPY

>

EC-IO

FEM

IETS

S.

TAMIA

HARK

SNEFTEGBR

VY

IFA

KBSCNEWHNTSCK,

3.

FWD,REVENENICRT,

F-ID

BME

SRUICT

POH

DEESNS

CEMA

S,

fi:

=

3,000Hz

*

45Hz

ZH.

30H2

LWA

4-6

D9

-7>v7T7RER

its

FWD,REV#H,

FTO

BH,

4A,

BRU

CEA

ENMET

SB.

4-6-1

BAK

1

Fig4-lIDkDICDD-DIOyvI

+

A-—-

Fay

FICHE

B.

2.

TEAC

MTT-HIF

Ah»

F~

TRIGA

MER

TAR,

FWDAUREVO

ii

i

CHELID

-

D

Oy

BG

WE

tS.

3.

BUS

0.05%

WRMS

(Re

HUE)

V-970X

0.055%

WRMS

(HBRe

HIE)

creo

R-919X

Teac V-970X Manual de usuario

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