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TEAC

SERVICE

MANUAL

CONTENTS

|

BR

4

SPECIFICATIONS

=<

scccrrecteeccreteeee

eter

es

tere

tees

nec

reece

es

2

ft &R

2

ADJUSTMENT

AND

CHECKS

veers

3

HE

CHES

3

EXPLODED

VIEWS

AND

PARTS

LIST

+------rrrrrrree

12

SARI

EN

-

YU

A

4

PC

BOARDS

AND

PARTS

LIST

rrr

16.

BRM

CN-YUA

5

INCLUDED

ACCESSORIES:

rrrsrsrsrttreresttererererenees:

19

‘tian

Effective

:

November,

1995

D00215700A

W-760R

|

1

SPECIFICATIONS

tt

Track

System

:

4-

Track,

2-Channe!

Stereo

Heads:

3;

Deck

I;

1

Playback

(Rotating)

Deck

I;

1

Erase

and

1

Record/Playback

(Rotating)

Type

of

Tape

:

Cassette

tape

C-60

and

C-90

(Philips

type)

Tape

Speeds

:

4.76

om/sec

(1-7/8

ips)

9.5

cm/sec

(3-3/4

ips)

(High

speed

dubbing)

Motors:

2

DC

servo

motors

(1

ea.

deck)

Wow

and

Flutter

:

0.06

%

(WRMS)

Frequency

response

(Overall,

-

20

dB):

25-19,000

Hz,

Metal

tape

25-18,000

Hz,

CrO,

tape

25-17,000

Hz,

Normal

tape

Signal

-

to

-

Noise

Ratio

(Overall)

:

59

dB

(NR

off,

3

%

THD

Level,

Weighted)

69

dB

(Dolby

B

NR

on,

over

5

kHz)

.

79

dB

(Dolby

C

NR

on,

over

1

kHz)

Fast

Winding

Time

:

:

Approximately

110

seconds

for

C-60

Input

:

Line:

87

mV,

50

k

ohms

Outputs

:

Line:

0.46

V

for

load

impedance

of

50

k

ohms

or

more

:

Headphones

:

8

ohms

Power

Requirements

:

120/230

V

AC,

50-60

Hz

(General

Export

model)

120

V

AC,

60

Hz

(U.S.A./Canada

model)

230

V

AC,

50

Hz

(Europe

model)

240

V

AC,

50

Hz

(Australia

model)

Power

Consumption

:

14

W

Dimensions

(W

x

H

x

D):

435

x

147

x

297.5

mm

(17-1/8"

x

5-13/16"

x

11-3/4"

)

Weight

(net):

4.2

kg

(9-1/4

Ibs.)

Standard

Accessories

:

input-output

connection

cords

@

Specifications

were

determined

using

metal

tape

except

as

noted.

;

@improvements

may

result

in

specification

or

feature

changing

without

notice.

Dolby

noise

reduction

and

HX

Pro

headroom

extension

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

HX

Pro

originated

by

Bang

&

Olufsen.

“DOLBY”,

the

double-

D

symbol

D]

and

“HX

PRO”

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

boy

HEX

AKhDyD2FeURAID

AFUT

A»

KBR

Deck

1:

BHA

Fx

1

Deck

Ll

:

RB/

BEN»

FX

1

HEAy

EX

1

teAsr-7

C-60,

C-90947

Atybr-TF

7>-T#E

4.8cm/sec,

9.5em/sec

(FARE

LV

7H)

E-F7=—

Deck

I

:

DCU-#KRE-9—-*X

1

Deck

I

:

DOH—-#E-9—~x

1

99-7534I—

0.06%(W.

RMS)

+

0.1%

(W.

Peak)

*

FRRUSE

GS)

AFI:

25~20,000Hz

(30~19,000Hz

+

3dB*)

Jo-dL:

25~19,000Hz

(30~18,000Hz

+

3dB*)

J-Vib:

25~18,000Hz

(30~17,000Hz

+

3dB*)

SNES

58dB

(NR

OFF,

MEER

L

NIL)

*

69dB(KJLDE-B

NR

ON,

CCIR-

ARM)

79dB(KJLDE-—C

NR

ON,

CCIR-ARM)

SABE

#)

110#(C-60

5-7)

An

547:

97mV

(ARAL

YVE-FYZR

50k

Q)

hy

54:

0.52V

(BBY

VE-FYZ

50k

QUE)

Ay

E74

:8Q

Bik

100V

AC,

50-60Hz

BREA

14W

WET

435

x

144

x

298mm

(W

XH

x

D)

ge

4.2kg

;

*tigda

AtAI—

F24(1

HB),

RAAB,

Ra

Oc

OPHIR

LIKRBERS,

SRE

—-PEBAL

THELKLOCT.

;

OLS

KOMI,

BEOR

MPH

BETS

CEMEDETS

@*«

His,

ARERR

LES

(EIAJ

CP-2311)

BUBIKED

ON

MEK

ESbOCT

NVE-/4

RUFF

a

YRUUXTONy

BI-LEIA

FUYaVIs

EVE-SRIRU-KRITEYYYTIA—R

L—Y

a

YDS

ORMBICBIOZ

BEEN

THET,

HX

Told

NUTS

Y

EAWICYOBRCS.

RILE-—,

DOLBY,

FFL

D#S

OO

RUHX

FOE

BILE-F

HS

KU-AXSALVVYYII—-RL—-Y

as

VOBRRECS.

|

W-760R

2

ADJUSTMENT

AND

CHECKS

«SS

Ce

2-1

MECHANICAL

ADJUSTMENT

2-1-1

Wow

and

flutter

(playback

method)

Note

:In

both

FWD

and

REV

play

modes,

these

measurements

should

be

made

at

the

beginning,

middie,

and

the

end

of

the

tape.

1.

Connect

a

wow

-and-flutter

meter

to

the

deck

as

shown

in

Fig.

2-1.

2,

Load

and

play

a

TEAC

MTT-ILIN

test

tape.

3.

Check

that

the

readings

on

the

wow~and-flutter

meter

is

within

0.15%

(WRMS).

OUTPUT

2-1-2

Tape

speed

1.

Connect

a

frequency

counter

to

the

deck

as

shown

in

Fig.

2-1.

2,

Load

a

TEAC

MTT-111N

test

tape

and

play

in

FWD

direction

the

beginning

of

the

test

tape.

3.

Adjust

each

variable

resistor

to

get

the

following

values.

CONTROL

PCB

—

Short

|

HIGH

SPEED

|

Open

|

LOW

SPEED

@

2-1

HR

ORE

21419975549

(BAK)

FE:

FWD,

REVESA

I

CF

—

7

OARS,

CH

BK)

SHES.

lL.

Fig.

2-1D

E399

+

FPG

R-V-EERT

SS.

2FALF-TMTT-1LINEBETS.

3.97+75

7

7§820.15

%

(WRMS)

DE

CHSC

LEER

FS.

Frequency

Counter

2-1-2F7-FAE-F

lL.

Fig.

2-LOK3

ICRA

OY

-

ERET

SO

2.FARF-PMTT-1LLUN

OBIS

OME

FWD

AR

CHET

3.

3.

AREBUBA

FT

ROMBA

EZ

KS,

SEAM

VR

(Fig.

2-2)%

ETS.

HIGH

speed

|

check

—y

——

LOW

speed

}

VR2

5,840~6,160Hz

2,995~3,005Hz

pLaysack

I

4

(measured

value

of

Deck

I

high

speed)

+

30Hz

FytLALRZE-K

Qa

+

30Hz

2,995

~3,005Hz

HIGH:

speed

rec/pLay

I

ae

LOW

speed

VR4

|

Fig.

2-2

4.1%

play

mode,

check

that

the

following

values

are

obtained

at

the

beginning

and

end

of

the

tape.

Speed

drifting

:

Within

120Hz

(HIGH

speed)

Within

60Hz

(LOW

speed)

4,

BIBDD

OBR

ECHEL.

BENE

ETERS

4.

ZESIR:

120H2LIN

(4

RE-F)

6OHzLIN

(a—-RE-~

#)

W-760R

2-1-3

Reel

torque

2-1-3

U—JIbR

IVD

1.

Load

the

cassette

torque

meter

on

the

deck

and

read

lL

Aey

KALB

A-FH

IKE

SHED

FILOMAN

CHS

the

pointer

indication

on

the

dial

scale

for

each

tape

CERES

So

transport

operation.

The

measured

torque

should

be

FADFTIAT

ERIM

:35~70g*cm

within

the

following

specified

values.

NyPIFUvYVaybhw7

:2.5~6g*cm

Take-up

:

35

to

70g°*cm

BEY

/ARLRIVZ

=:

80~170g*cm

Supply:

2.5

to

6g+*cem

FF/REW:

80

to

170g+cm

Voltage

Conversion

(General

export

models

only)

Be

sure

to

remove

the

power

cord

from

the

AC

outlet

before

repositioning

the

voltage

converter

switch.

VOLTAGE

1,

Locate

the

voltage

selector

on

the

rear

panel.

.

SELECTOR

2.

Using

a

flat-bladed

screwdriver,

set

to

the

appropriate

aN

230

V

or

120

V

position

according

to

your

area.

2-2

ELECTRICAL

ADJUSTMENT

2-2-1

Precautions

Before

performing

adjustments

and

checks

clean

and

demagnetize

the

entire

tape

path.

In

general,

adjustments

and

checks

are

made

in

the

order

of

Lch

then

Rch.

Double

REF.

Nos.

indicate

Lch

/Rch.

(Example

;

R11/R21)

OdB

is

referenced

to

0.775V.

The

AC

voltmeter

used

in

the

procedures

must

have

an

input

impedance

of

IMQ

or

more.

;

Unless

specified

otherwise,

adjustments

and

checks

are

made

in

FWD

direction.

2-2-2

Adjustment

locations

243£(@/At

|

W-760R

2-2

7YTROWE

2-2-1

j=

@

FY

PRORMS

-

MBO,

F

—~TEAROTM

CRE

oT

<K

HRW.

@

BicSEOR

UBD.

Bla

Lch,

Roh

OMY

CH

oC

KK

SW.

BM

RU/R2DE

DIENT

OZABSS

ld

Leh

Rch®ARULET.

@

0dB=0.775V

@

HEKBATSUAVHOANT

VE-FVAWIMQUED

HOLMER

LT

OR

SW.

@

RIUHEOKUIBA,

BES

EOWIE

FWD

ACTS

2

T

CHEW,

Ey

Grece

L103 L203

Ol

C125

~{Ho

C225

R14

R24

rec/PLay

If

PLAYBACK

J

Ri1

OPO

rea

Fig.

2-3

kK

R13

ec)

@

pos

MAIN

PCB

L101

.

460

wl

C118

a

Us

x

ja

=

C218

5

[|

3

‘L201

W-760R

|

2-2-3

Playback

performance

B44

TEAC

test

tapes:

MTT-150C

:

For

Dolby

level

calibration

MTT-25702:

For

playback

frequency

response

check

NORMAL

tape

Deck

settings:

Mode

:

PLAY

DOLBY

NR

Switch

:

OFF

.

Head

azimuth

adjustment

FUT

ARE

Connection

:

Fig.

2-5

Check

“adjust

in

FWD,

REV

respectively

FWD,

REVEnZn

Hi

.

27)

MTT-5512

MTT-

150C

MTT-25702

(12.5kHz)

:

For

S/N

check

NORMAL

tape

Azimuth

screws

FUT

AREAL

OUTPUT

:

Phase

:

within

45°

{7

#8:

45°

LW

(Fig.

2-6)

OUTPUT

:

Maximum

output

level

at

L

&

R-ch

Leh,

Roch

&

SHARA

FWD

azimuth

REV

azimuth

.

DOLBY

level

RIDE

bAly

Playback

output

level

BEAL

AIL

.

Meter

level

A-F-VAIP

.

PHONES

output

level

PHONES

HAVAIL

.

Playback

frequency

response

BER

Ree

Connection

:

Fig.

2-7

FWD

PLAY

Connection

:

Fig.

2-4

FWD/REV

PLAY

Connection

:

Fig.

2-8

Connection

:

Fig.

2-4

MTT-

150C

MTT-

150C

MTT-

1500

MTT-

150C

MTT-25702

R1I1/R21

R12/R22

TP

;C118O,/C2180

:

-6dB

(388mV)

OUTPUT

:

-

454

1dB

(411mV~518mvV)

PEAK

LEVEL

METER:

Cl

mark

+

1dot

PHONES

:

-19+3dB_

(61.6mV~

123mV)

Ref.

output

level

AEWA

L

AIL

8

Q

load

8

Q

Bis

—4dB

12.5k(Hz)

.

Playback

S/N

ratio

RES/NEE

Attenuator

Connection

:

Fig.

2-4

Oscillator

LINE

IN

YF

Be

Distorion

Analyzer

MTT-5512

Playback

the

leader

tape

portion

Check

OUTPUT

FTE

Oscilloscope

Fig.

2-4

Basic

test

setup

1kHz

Filter

AC

voltmeter

Ratio

of

ref.

level

to

noise

REWALANIVE

J4

KOK

|

W-760R

2-2-4

Monitor

performance

£24

—H%

Deck

settings:

Mode

:

REC-

PAUSE

DOLBY

NR

Switch

:

OFF

8.

Min.

LINE

.

Connection

:

Fig.

2-4

|

LINE

IN:

OUTPUT

:

input

level

REC

LEVEL

Control!

:MAX

400Hz/—

19dB

—45

+

3dB

So

UR)

:

Be

RHI

BALANCE

Control

:Center

(87mV)

(327mV~652mV)

9.

Specified

After

adjusting,

LINE

input

LINE

IN:

REC

LEVEL

OUTPUT

:

do

not

move

level

Connection

:

Fig.

2-4

400Hz/—

9dB

—

4.5dB

(Specific

position)

54

URE

(275mV)

BALANCE

(462mV)

WELD

DA

RADA

;

ar

Wo

&

GREK)

—+-

10.

Monitor

Ratio

of

ref.

level

LINE

IN:

'

S/N

ratio

E-5—

Connection

:

Fig.

2-4

ie

signal

60dB

min.

BALL

ULE

S/N

ft

=

JAZOL“E

Oscilloscope

AC

voltmeter

MAIN

PCB

C1184

e

cais

t.

AC

voltmeter

OUTPUT

Fig.

2-5

Test

setup

for

azimuth

check

:

Fig.

2-7

Test

setup

for

DOLBY

level

adjustment

AC

voltmeter

O°(in

phase)

45°

90°

135°

180

°(out

of

phase)

(

falizte

)

;

(Be24B

)

W-760R

PHONES

©|

<=

CID

DES

Test

load

resistors

Fig.

2-6

Confirming

phase

relationship

Fig.

2-8

Test

setup

for

PHONES

check

W-760R

|

1

am

2-2-5

Recording

performance

&a*%

Deck

settings:

Mode

:

REC/PLAY

DOLBY

NR

Switch

»

OFF

REC

LEVEL

Control

:

Specified

position

#7E(Zia

(Item

9)

BALANCE

Control

:

Specified

position

#3E

Zia

(Item

9)

TEAC

recording

test

tapes:

MTT-5512

:

For

NORMAL

MTT-5562

:

For

CrO,

MTT-5571

:

For

METAL

.

Bias

osc

frequency

NAFTA

Essind

pees

Connection

:

Fig.

2-9

TAPE:

MTT-5512

Mode

:

REC

LINE

IN:

No

signal

Ries

P303-2:

100kHz

.

Step

up

coil

ATITP

v7

a4)b

.

Record

bias

REINA

PA

.

MPX

filter

MPX

J4/b9—

.

Record

level

BELA

Connection

:

Fig.

2- 10

TAPE

:

MTT-5571

Mode:

REC

~

Connection

:

Fig.

2-4

TAPE

:

MTT-5512

Connection

:

Fig.

2-4

Mode

:

REC

Connection

:

Fig.

2-4

TAPE

:

MTT-5862

MTT-5571

LINE

IN:

No

signal

ES

L103/L203

LINE

IN:

250Hz/

10kHz

—

42dB

(6.16mV)

R14/R24

LINE

IN:

19kHz/—-

12dB

(195mV)

L101/L201

LINE

IN:

RI3/R23

400Hz/-

12dB

(195mV)

TP;

C125/C225

:

Min.

DC

voltage

DC

SE

ax/)\

OUTPUT

:

Nearly

equal

level

at

both

frequencies

MA

RRORS

YAN

fl

SIL)

(+

0.5dB)

30dB

min.

OUTPUT

:

-7.5dB

(327mvV)

—7.5

+

1dB

(291mV~367mvV)

Ratio

of

ref.

level

to

signal

REM

AL

AIC

IT

Slt

.

Total

harmonic

distortion

Connection

:

Fig.

2-4

TAPE

:

MTT-5512

MTT-5562

MTT-5571

LINE

IN:

A00Hz/-

12dB

(195mvV)

NORMAL

:

2.0%

or

less

CrQ,

:

25%

or

less

METAL

:

3.0

%

OF

less

.

Overall

frequency

response

Pees

Goad

Connection

:

Fig.

2-4

TAPE

:

MTT-5512

MTT-5562

MTT-5571

LINE

IN:

A0Hz~

12.5kHz

—

42dB

(6.16mV)

~-6dB

12.5k(Hz)

.

Overall

S/N

ratio

MSS/NEL

Connection

:

Fig.

2-4

TAPE

:

MTT-5512

MTT-5562

MTT-5571

LINE

IN:

No

signal

RIES

NORMAL

:

45dB

min.

CrOQ.

:

46dB

min.

METAL

:

46dB

min.

Ratio

of

ref.

level

to

noise

EMAL

AIVE

JI

AOE

.

Erase

efficiency

ARS

Connection

:

Fig.

2-4

TAPE

:

MTT-5571

1kHz

B.P.F

in

LINE

IN:

1kHz/+

1dB

(870mV)

|

W-760R

Ratio

of

the

1kHz

recorded

portion

to

the

erased

portion.

HIHABS

CRABS

OL

.

REC

MUTE

function

REC

MUTE

sR

Connection

:

Fig.

2-4

TAPE

:

MTT-5571

kHz

B.P.F

in

LINE

JIN:

1kHz/+

1dB

(870mV)

Ratio

of

the

1kHz

recorded

portion

to

the

“REC

MUTE

“portion.

SREB

C*

REC

MUTE”

BAO

Lk.

.

Channel

seperation

FeUAlb

tiNy-Yyay

Connection

:

Fig.

2-4

TAPE

:

MTT-5562

1kHz

B.P.F

in

LINE

IN

:

Leh

1kHz/—

9dB

(275mV)

Rch

No

signal

RES

Ratio

of

Leh

(1kHz)

to

Reh

(no

signal).

Loh(1kHz)

&

Roh

HES)

Okt

.

Adjacent

track

crosstalk

bow

fil

JOAK-F

Connection

:

Fig.

2-4

TAPE

:

MTT-5571

LINE

IN:

Lch

No

signal

ES

Rech

125Hz/-9dB

(275mV)

Frequency

Counter

MAIN

PCB

Fig.

2-9

Test

setup

for

bias

OSC

adjustment

Invert

tape

and

play

Rech

track.

Check

leckage

level

against

the

output

reference

of

previously

recorded

portion.

>-JSeRe.CBELE

PFO

Roh

HAL

AILO

LE

DC

voltmeter

MAIN

PCB

tb

4b

C125

C225

Fig.

2-10

Test

setup

for

step

up

coil

adjustment

W-760R

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