Akai GX-630D Manual de usuario

SEAM

AKAI

STEREO

30D

DEC

moos

(-630

AKAI

STEREO

TAPE

DECK

mopeL

GX-630D

ALSO

APPLICABLE

MODEL

GX-630DB

STEREO

TAPE

DECK

SECTION

SERVICE

MANUAL

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SECTION

PARTS

LIST

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0...

cece

eee

SPECIFICATIONS

0.0.0...

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Il.

DISMANTLING

UNIT

......

0.000

Ill.

ARRANGEMENT

PRINCIPAL

PARTS

........

0.0

eee

ett

ees

IV.

MECHANISM

ADJUSTMENT

........

2.000

eee

ees

POSITION

ADJUSTMENT

BRAKE

SOLENOID

SL-2

...

2...

eee

BRAKE

TENSION

ADJUSTMENT

....

0.00.

POSITION

ADJUSTMENT

PINCH

ROLLER

SOLENOID

SL-1

........---

+++

eee

uee

PINCH

ROLLER

PRESSURE

ADJUSTMENT

.....

0...

eee

tee

CAPSTAN

SHAFT

LOOSE

PLAY

ADJUSTMENT

.......---

eee

ees

IMPEDANCE

ROLLER

LOOSE

PLAY

ADJUSTMENT

.....

16...

eee

ees

TAPE

GUIDE

HEIGHT

ADJUSTMENT

......-

eee

REEL

TABLE

HEIGHT

ADJUSTMENT

.....

0.2.6

eee

INSTALLATION

POSITION

ADJUSTMENT

JOINT

B....

6...

eee

ees

HEAD

ADJUSTMENT

.........

0-0

cee

eee

nee

VI.

AMPLIFIER

SYSTEM

ADJUSTMENT

...... 2.2.2.

eee

tens

D.C

POWER

SUPPLY

VOLTAGE

ADJUSTMENT

......---

eters

TAPE

SPEED

ADJUSTMENT

.....

2...

ip)

RECORDING

AND

PLAYBACK

AMPLIFIER

ADJUSTMENT

(GX-630D)

.........-.----

RECORDING

AND

PLAYBACK

AMPLIFIER

ADJUSTMENT

(GX-630DB)

...........---

DOLBY

NOISE

REDUCTION

ADJUSTMENT

(GX-630DB)

....

6.6...

sere

eee

VII.

D.C

RESISTANCE

VARIOUS

COILS

1...

2...

VIII.

CLASSIFICATIONS

VARIOUS

P.C

BOARDS

.....

2.2...

cece

P.C

BOARD

INTERCHANGEABILITY

CHART

....

0.2...

ees

COMPOSITE

VIEWS

VARIOUS

P.C

BOARD

....

2-6-0

SECTION

SERVICE

MANUAL

TABLE

CONTENTS

For

basic

adjustments,

measuring

methods,

and

operating

principles,

refer

GENERAL

OPERAT-

ING

PRINCIPLES

AND

ADJUSTMENTS.

SPECIFICATIONS

asterisk

figure

indicates

the

minimum

guaranteed

performance.

TRACK

SYSTEM

track

channel

stereo/monaural

system

TEPE

SPEED

7-1/2

and

3-3/4

ips

+0.7%

*7-1/2

and

3-3/4

ips

+1.0/—1.5%

WOW

AND

FLUTTER

Less

than

0.06%

WRMS

7-1/2

ips

Less

than

0.09%

WRMS

3-3/4

ips

*Less

than

0.10%

RMS

7-1/2

ips

*Less

than

0.15%

RMS

3-3/4

ips

TOTAL

WOW

AND

FLUTTER

*Less

than

0.12%

RMS

7-1/2

ips

*Less

than

0.18%

RMS

3-3/4

ips

FREQUENCY

RESPONSE

25,000

7-1/2

ips

19,000

3-3/4

ips

(with

AKAI

LN-150-7

Tape)

*30

22,000

7-1/2

ips

*30

18,000

3-3/4

ips

HARMONIC

DISTORTION

Less

than

0.5%

TOTAL

HARMONIC

DISTORTION

*Less

than

1.5%

SIGNAL

NOISF

RATIO

Better

than

TOTAL

SIGNAL

NOISE

RATIO

*Better

than

*0.775V

dBm

+1.0

dB)

ohm

playback

700

“0”

pre-recorded

test

tape.

(Output

Volume

maximum)

OUTPUT

LINE

HEADPHONE

INPUT

MIC

LINE

DIN

INPUT/OUTPUT

RECORDING/PLAYBACK

LEVEL

CROSS

TALK

ERASE

RATIO

RECORDING

BIAS

FREQUENCY

BIAS

LEAK

HIGH

FREQUENCY

DEVIATION

than

0.25

mV/10

ohm

than

mV/150

ohm

“0”

output.

(Recording

Volume

maximum)

0.25

mV/0.5V

*0.775V

dBm

+1.5

dB)

Better

than

dB,

stereo

Better

than

dB,

monaural

Bec

RECORDING

TIME

Better

than

100

kHz

+5%

Better

than

—30

(GX-630D)

Better

than

—50

(GX-630DB)

Within

playback

8,000

3-3/4

ips

pre-recorded

tape

7-1/2

ips

180

min

stereo

recording

7-1/2

ips,

using

3,600

tape.

F.FWD

AND

RWD

TIME

Approximately

min

and

sec

Hz,

using

3,600

tape.

MOTOR

MAIN

MOTOR

REEL

MOTOR

speed

servo

control

outer

rotor

motor

Type:

SCM2-24K]J

pole

Revolutions:

615

rpm

7-1/2

ips

(19

cm/sec)

307.5

rpm

3-3/4

ips

(9.5

cm/sec)

pole

eddy

current

outer-rotor

motor

Type:

24X0-TD

Revolutions:

930

rpm

1,120

rpm

HEAD

ERASE

HEAD

RECORDING

HEAD

PLAYBACK

HEAD

Type:

E4-260

Gap:

double

gap

Impedance:

210

ohm

+10%

100

kHz

D.C

Resistance:

ohm

Type:

R4-200

Gap:

micron

Impedance:

1,870

ohm

100

kHz

D.C

Resistance:

ohm

Type:

P4-202

;

Gap:

1.7

+0.5

micron

Impedance:

1,400

ohm

kHz

D.C

Resistance:

268

ohm

TRANSISTOR

FET

2SA564(Q)(R)

1(5)

2SC1247A(B)(Y)

2(2)

2SC458(C)

0(12)

2SD361(D;)(D2)

...

1(1)

2SC458LG(C)

16(32)

TIP47

...1(1)

2SC711(F)(G)

2(2)

2SK30A(GR)

0(4)

2SC945L(Q)(P)

. .

22(22)

DIODE

1N34A

...

2(6)

10D2...4(4)

1N4001...

4(4)

WZ075

2(2)

1N4004

6(6)

WZ08S5

0(4)

181588...

11)

WZ192...10)

182473...

21(21)

RDSA(M)

1(1)

182473VE

...

16(28)

POWER

REQUIREMENT

AND

CONSUMPTION

100

240V

50/60

Hz,

90W

(Universal

Models)

220V

Hz,

100W

(CEE

Models)

120V

Hz,

90W

(CSA

Models)

100V

50/60

Hz,

70W

(JPN

Models)

DIMENSIONS

465(H)

440(W)

240(D)

(18.3”

17.4”

9.4”)

Dimensions

include

all

protruding

parts.

WEIGHT

GX630D:

(41.8

Ibs)

GX-630DB:

19.5

(42.9

Ibs)

NOTES:

Specifications

determined

with

SCOTCH

#211

Tape

unless

otherwise

noted.

Specifications

subject

change

without

notice.

The

numbers

shown

parentheses

Items

TRANSISTOR

FET

and

DIODE

are

applicable

Model

GX-630DB.

DISMANTLING

UNIT

case

trouble,

etc.

necessitating

disassembly,

please

disassemble

the

order

shown

photographs.

Reassemble

reverse

order.

SCREWS

li!

ARRANGEMENT

PRINCIPAL

PARTS

BRAKE

HOLD

MICRO

SWITCH

SW-8,

SW-9

BRAKE

SOLENOID

SL-2

PINCH

ROLLOR

SOLENOID

SL!

|'MPEDANCE

ROLLER

HEAD

BLOCK

TENSION

MICRO

REEL

SIZE

SW-3

SWITCH

SW-7

TAPE

SPEED

SW-2

PAUSE

MICRO

SWITCH

sw-5

POWER

SW-!

REEL

SIZE

SW-4

PUSH

BUTTON

MONITOR

SW-!

PAUSE

MICRO

SWITCH

Ssw-6

RIGHT

REEL

MOTOR

24X0-TD

LEFT

REEL

MOTOR

24xX0-

srmaseen

SERVO

BOARD

Obes

RELAY

BOARD

TE-2002

MAIN

MOTOR

SCM2-24KJ

SYS-CON

P.C_BOARD

TE-

200!

AMP

BOARD

REC

AMP

P.C

BOARD

-5016

MY-

5017

MECHANISM

ADJUSTMENT

SPRING

RACK

MICRO

SWITCH

SW-8,

SW-9

BRAKE

LEVER

SPRING

BRAKE

BAND

LEVER

ced

“a

BRAKE

LEVER

Gaal

Sealy

BRAKE

SOLENOID

SL~-2

BRAKE

BAND

LEVER

BRAKE

BAND

SUPPORT

BRAKE

BAND

SUPPORT

BRAKE

LEVER

Fig.

BRAKE

DRUM

BRAKE

BAND

GUIDE

BRAKE

LEVER

CLOTH

TAPE

BRAKE

BAND

BRAKE

BAND

GUIDE

Fig.

POSITION

ADJUSTMENT

BRAKE

SOLENOID

SL-2

(Refer

Figs.

Adjust

left/right

Brake

Band

Support

positions

that

stop

mode,

Brake

Lever

and

Brake

Lever

display

180°

angle

relativity.

Under

the

conditions

described

above,

adjust

installation

angle

position

Microswitches

SW-8

and

SW-9

that

the

clearance

between

the

brake

lever

and

brake

band

lever

1.5

mm.

Adjust

installation

position

the

Brake

Solenoid

that

playback

mode,

the

brake

band

sepa-

rates

from

the

brake

drum.

BRAKE

TENSION

ADJUSTMENT

(Refer

Figs.

Adjust

installation

position

the

Spring

Rack

that

brake

tension

500g.

After

brake

tension

adjustment,

adjust

installation

position

the

Brake

Band

Guide

that

all

modes

except

stop

mode,

the

brake

band

com-

pletely

separates

from

the

cloth

tape

the

brake

drum.

PINCH

ROLLER

SOLENOID

SL—I

PLUNGER

PULL

BAR

PINCH

ROLLER

PRESSURE

ADJUSTMENT

NUT

1.4Kg

PINCH

ROLLER

Fig.

POSITION

ADJUSTMENT

PINCH

ROLLER

SOLENOID

SL-!

(Refer

Fig.

Insert

thickness

gauge

type

washer

can

substituted)

between

the

Pull

Bar

and

Pinch

Roller

Arm.

Set

the

deck

playback

mode,

and

fix

Pinch

Roller

Solenoid

position

which

pinch

roller

begins

rotate.

THRUST

SUPPORT

ANGLE

4.PINCH

ROLLER

PRESSURE

ADJUST-

MENT

(Refer

Fig.

Adjust

Pinch

Roller

Pressure

Adjustment

Nut

that

pinch

roller

pressure

1.4

kg.

NOTE:

measure

pinch

roller

pressure,

pull

the

pinch

roller

away

from

capstan

with

spring

gauge

and

gently

return.

Spring

Gauge

indi-

cation,

the

time

the

pinch

roller

contacts

the

capstan

and

the

capstan

begins

rotate,

should

1.4

kg.

CAPSTAN

SHAFT

Fig.

CAPSTAN

SHAFT

LOOSE

PLAY

ADJUST-

MENT

(Refer

Fig.

Adjust

obtain

clearance

0.1

between

the

Capstan

Shaft

and

Thrust

Support

Angle.

IMPEDANCE

ROLLER

IMPEDANCE

ROLLER

LOOSE

PLAY

AD-

Fig.

JUSTMENT

(Refer

Fig.

Adjust

Screws

and

that

impedance

roller

loose

play

0.1

mm.

NOTE:

Confirm

that

the

screws

are

tight

following

this

adjustment.

TAPE

GUIDE

TAPE

TENSION

ARM

ADJUSTMENT

WASHER

ADJUSTMENT

WASHER

Wy)

LOWER

THE

GUIDE

DOWN

LITTLE

LIFT

THE

GUIDE

LITTLE

Fig.

TAPE

GUIDE

ADJUSTMENT

WASHER

0.!/t

hndkiddficlhih

(LL

Lhe

Fig.

TAPE

GUIDE

HEIGHT

ADJUSTMENT

(Refer

Figs.

;

Adjust

tape

guide

height

that

the

tape

does

not

curl

between

the

tape

guide

and

guides

head

base.

NOTE:

left

and

right

tape

guide

height

adjust-

ment

methods

are

different.

sure

refer

Figs.

and

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