Akai GX-266D Bedienungsanleitung

SERVICE

MANUAL

PARTS

LIST

worn

GX-266D

G4|

AKAI

STEREO

TAPE

DECK

move.

GX-266D

SECTION

SERVICE

MANUAL

SECTION

PARTS

LIST

TECHNICAL

DATA

TRACK

SYSTEM

track

channel

stereo/monaural

system

REEL

CAPACITY

7”

reel

TAPE

SPEED

____7-1/2

and

3-3/4

ips.

(40.5%)

WOW

FLUTTER

Less

than

0.06%

7-1/2

ips.

Less

than

0.09%

3-3/4

ips.

FREQUENCY

RESPONSE

25,000

7-1/2

ips.

using

tape

19,000

3-3/4

ips.

using

tape

;

26,000

7-1/2

ips.

using

tape

20,000

3-3/4

ips.

using

tape

DISTORTION

(1,000

“0”

VU)

Less

than

0.5%

7-1/2

ips.

Less

than

1.0%

3-3/4

ips.

SIGNAL

NOISE

RATIO

Better

than

(Measured

via

tape

with

peak

recording

level

VU)

ERASE

RATIO

Better

than

BIAS

FREQUENCY

100

kHz

HEADS

(6):

Two

Playback

Heads,

Two

Recording

heads,

Two

Erase

heads

MOTORS

(3):

One

Servo

Capstan

Motor

Two

Eddy

Current

Reel

Motor

F.F

Rewind

Time

sec.

using

1,200

ft.

tape

OUTPUT

JACKS

Line

(2):

0-0.775V

(MAX

VU)

required

load

impedance:

than

ohms

Phone

(1):

0—100

mV/8

ohms

(MAX

VU)

INPUT

JACKS

Microphone

(2):

0.25

mV/2.4

ohms

required

microphone

impedance:

600

ohms

___|__Line

(2):

mV/100

ohms

SEMICONDUCTORS

Transistors:

61,

Diodes:

DIMENSIONS

404

(W)

470

(H)

250

(D)mm,

(15.9

18.5

9.8”)

sells

250(D)mim

With

Wood

Side

Plate

WEIGHT

18.3

(40.4

Ibs.)

:__20.6

(45.5

Ibs.)

With

Wood

Side

Plate

"POWER

REQUIREMENTS

___110/120/220/240V,

50/60

Switchable

For

improvement

purposes,

specification

and

design

are

change

without

notice.

DISMANTLING

UNIT

case

trouble,

etc.

necessitating

disassembly,

please

disassemble

the

order

shown

photographs.

Reassemble

reverse

order.

HEAD

COVER:

PINCH

ROLLER

CAP

SCREWS

CONTROL

KNOB

SWITCH

KNOB

UPPER

PLATE

SIDE

TENSION

PLATE

ARM

PINCH

ROLLER

SCREWS

MACHA

PANEL

BOTTOM

PLATE

SCREWS

AMP

PANEL

OPERATION

PANEL

SCREWS

REAR

PLATE

SCREWS

li.

CONTROLS

Q@O@@®

@®©

QCOOCW!®

INDEX

COUNTER

AND

RESET

BUTTON

PINCH

ROLLER

HEAD

COVER

SUPPLY

REEL

TABLE

REEL

RETAINER

TAPE

GUIDE

(SENSING

POLE:

FORWARD-REVERSE)

TENSION

ARM

PAUSE

LEVER

(PAUSE)/REC

MUTE

OFF

REVERSE

SELECTOR

(REV

SELECTOR)

POWER

SWITCH

(POWER)

RECORDING

MUTE

SWITCH/TIMING

LAMP

METER

(FOR

LEFT

CHANNEL)

METER

(FOR

RIGHT

CHANNEL)

MONITOR

SWITCH

(MONITOR)

HEADPHONE

JACK

(PHONES)

MONITOR

TMeR

BTART

PAL

rare

YAPa

Tape

—AEC-—

armas

tend}

SPHEO

SELECTOR

vary

Alcor

Low

16,

17,

18.

19.

20.

TENSION

ARM

(SENSING

POLE:

REVERSE>FORWARD)

OPERATION

BUTTONS

MEMORY

MARKER

(FOR

LINE-IN)

MEMORY

MARKER

(FOR

MIC-IN)

MICROPHONE

INPUT

CONTROLS

(REC

LEVEL-MiC

LINE

INPUT

CONTROLS

(REC

LEVEL-LINE)

MICROPHONE

JACK

(MIC)

RECORDING

LEVER

(REC)

TAPE

SELECTOR

TAPE

SPEED

SELECTOR

S8SBNSREESKS

COQ

OOO

LINE

OUTPUT/HEADPHONE

OUTPUT

CONTROLS

(LINE

OUT-PHONES)

TIMER

START

SWITCH

(TIMER

START)

REEL

RETAINER

TAKE-UP

REEL

TABLE

TAPE

GUIDE

IV.

[=]

PON

AHRAWN

PINCH

ROLLER

MICRO

SWITCH

SW-905

PINCH

ROLLER

PLUNGER

SOLENOID

SL-3

PAUSE

MICRO

SWITCH

SW-903

SW-907

TENSION

MICRO

SWITCH

SW-904

MUTE

SWITCH

P.C

BOARD

NE-2228

BRAKE

PLUNGER

SOLENOID

SL-901

BRAKE

MICRO

SWITCH

SW-906

REEL

MOTRO

MICRO

SWITCH

SW-908

HEAD

BLOCK

RIGHT

REEL

MOTOR

24X0-MR

11.

12.

13.

14,

15.

16.

17.

18.

19.

PRINCIPAL

PARTS

LOCATION

Rear

View

OPERATION

P.C

BOARD

NE-2239

MIC

AMP

P.C

BOARD

NE-5223

AMP

P.C

BOARD

NE-5222

POWER

TRANSFORMER

NET-11

LEFT

REEL

MOTOR

24X0-MR

VOLTAGE

SELECTOR

SYSTEM

CONTROL

P.C

BOARD

NE-1213

CAPSTAN

MOTOR

SCM2-24KJ

REV

PLUNGER

SOLENOID

SL-902

MECHANISM

PINCH

ROLLER

MICRO

SWiTCH

SW905

QUICK

PLATE

Fig.

PINCH

ROLLER

POSITION

ADJUSTMENT

STOP

MODE

(Refer

Fig.

Remove

head

block.

Adjust

Stopper

that

the

clearance

between

Pinch

Roller

and

Capstan

Shaft

10mm.

Fig.

POSITION

ADJUSTMENT

PINCH

ROL-

LER

SOLENOID

SL-3

(Refer

Fig.

Remove

head

block.

Insert

4.2

gauge

type

washer

etc.)

between

the

Plunger

Lever

and

Joint

(Refer

Fig.

3).

Set

the

deck

playback

mode

and

fix

Pinch

Roller

Solenoid

position

which

the

pinch

Roller

begins

rotate.

PINCH

ROLLER

PRESSURE

ADJUSTMENT

(Refer

Fig.

Adjust

Pinch

Roller

Pressure

Adjustment

Nut

that

pinch

roller

pressure

1.2

kg.

POSITION

ADJUSTMENT

QUICK

PLATE

(Refer

Fig.

Adjust

Quick

Plate

position

that

stop

mode,

the

Pinch

Roller

Microswitch

operates

properly,

and

the

Quick

Plate

does

not

strongly

hit

against

the

body

the

microswitch.

ADJUSTMENT

PINCH

ROLLER

PRESSURE

ADJUSTMENT

NUT

—

1.3

1.4

PLUNGER

LEVER

POSITION

ADJUSTMENT

BRAKE

SOLENOID

SL-1

(Refer

Fig.

Set

the

deck

playback

mode,

and

fix

Brake

Solenoid

position

which

the

left

and

right

brake

levers

display

180°

angle

relativity.

POSITION

ADJUSTMENT

BRAKE

MICROSWITCH

SW-906

(Refer

Fig.

Set

the

deck

playback

mode,

and

adjust

Brake

Solenoid

Microswitch

position

that

the

micro-

switch

operates

properly.

BRAKE

TENSION

ADJUSTMENT

(Refer

Fig.

Adjust

Spring

Stopper

position

that

the

brake

tension

350

500g.

BRAKE

SOLENID

SL-1

REEL

MOTOR

BRAKE

MICROSWI'cH

Soe

sooe

MICROSWITCH

Sw908

SwoE

PAUSE

MICROSWITCH

SW-903,

SW-307

PAUSE

SUDE

0.3405

PAUSE

ADJUSTMENT

(Refer

Fig.

playback

mode,

lock

Pause

Lever.

Adjust

Pause

Lock

Plate

position

obtain

0.3

0.5

clearance

between

Pinch

Roller

and

Cap-

stan.

When

making

this

adjustment,

careful

that

the

clearance

between

Pinch

Roller

and

Capstan

does

not

exceed

0.5

mm.

Confirm

that

the

Quick

Tension

Microswitch

pushed

when

the

Pause

Lever

depressed

and

not,

adjust

with

Lever

pHs

SUPPORT

ANGLE

O.tmm

CAPSTAN

eal

¥.

{OI}

ADJUSTMENT

WASHER

CAPSTAN

SHAFT:

Fig.

TANSION

MICRO

SWITCH

SW-904

Fig.

FIXATION

SCREW

PIPE

LIL

ORCL

LILEL

(iF

CAPSTAN

SHAFT

LOOSE

PLAY

ADJUST-

MENT

(Refer

Fig.

Adjust

obtain

clearance

about

0.1

between

the

capstan

shaft

and

thrust

support

angle.

10.

OPERATING

POSITION

ADJUSTMENT

TENSION

MICROSWITCH

SW-904

(Refer

Fig.

Adjust

Tension

Microswitch

position

that

when

the

Tension

Arm

drops,

the

microswitch

operates

perfectly

effect

stop

mode.

TAPE

GUIDE

te,

TAPE

TENSION

ARM

ADJUSTMENT

WASHER

LOWER

THE

GUIDE

DOWN

LITTLE

ADJUSTMENT

WASHER

XLFT

THE

GUIDE

UPA

LITTLE

Fig.

11.

TAPE

GUIDE

HEIGHT

ADJUSTMENT

(Refer

Fig.

Adjust

Tape

Guide

height

that

the

tape

does

not

curl

between

tape

guides

Head

Base.

case

the

tape

guide

low,

adjust

inserting

Type

Washer

the

right

side

Fig.

and

case

high,

adjust

inserting

washer

the

left

side.

12.

REEL

TABLE

HEIGHT

ADJUSTMENT

(Refer

Fig.

Load

tape

and

sét

the

deck

F.FWD

and

REV

modes.

Adjust

Reel

Table

height

that

the

tape

winds

the

center

the

reels

both

modes.

Tape

should

wind

center

reel

regardless

type

reel

used.

Vi.

HEAD

ADJUSTMENT

TAPE

GUIDE

HEIGHT

ADJUSTMENT

NUT REV

PLAYBACK

RECORDING

ERASE

HEAD

HEAL

Fie

clis

sta

tar260

Re-240

(pazeo

Fig.

Test.

Tape

Adjustment

Step

Adjustment

Supply

Signal

Mode

Point

Remarks

——

Tape

Guide

Adjust

that

tape

travels

Tape

Guide

Optional

FWD

Height

smoothly

and

does

not

twist.

Height

Adjustment

not

thread

tape

over

tension

Nut

arm.

Upper

edge

channel

head

core

FWD

Erase

‘ .

Optional

FWD

A\(B\C

0.1mm

higher

than

upper

edge

Head

Height

(ABYC)

tape.

FWD

Recording

Upper

edges

channel

head

core

Head

Height

Optional

(DXE)(F)

and

tape

are

the

same

height.

FWD

Playback

;

Upper

edges

channel

head

core

Head

Height

Optional

(GH)

and

tape

are

the

same

height.

FWD

Playback

8,000

Head

Azimuth

3-3/4

ips

FWD

qd)

Maximum

output,

both

channels,

Alignment

Test

Tape

Adjust

head

gap

surface

that

FWD

Playback

8,000

there

change

output

level

Head

Gap

3-3/4

ips

FWD

(K)

when

tension

applied

the

sup-

Alignment

Test

Tape

ply

reel

side

‘|

FWD

Recording

Scotch

#211

Tape,

Head

Azimuth

15,000

REC

(F)

Maximum

output,

both

channels,

Alignment

—20

dBm

;

Adjust

head

that

FWD

Recording

Scotch

#211

Tape,

sles.

ree

sid

eel

Head

Gap

15,000

REC

when

tension

applied

the

sup-

Alignment

—20

dBm

ply

reel

side,

Chart

NOTES:

perfect

head

adjustments

are

vital

tape

deck

performance,

sure

that

these

adjustments

are

carried

out

properly.

careful

not

use

magnetized

driver

other

magnetized

tools

the

vicinity

the

heads.

Use

only

new

tape

level

variation

likely

occur

when

using

old

tape.

Demagnetize

heads

with

head

demagnetizer

before

and

after

head

adjustment.

Set

tape

speed

7-1/2

ips

except.

Adjustments

outlined

Chart

are

only

for

FWD

side

heads.

However,

adjustments

for

REV

side

heads

are

exactly

the

same.

Vit.

ELECTRICAL

ADJUSTMENT

POWER

SUPPLY

AND

TAPE

SPEED

ADJUSTMENT

Seika

Mian

SP:

Sat

sah

tise

iia

Saha

Pinte

cairo

12%

VR-1

1kB_

Voltage

Adj.

VR-2

50kB

3-3/4

ips

Tape

Speed

Adj.

VR-3

10kB

7-1/2

ips

Tape

Speed

Adj.

VRI

VR3

VR2

Fig.

Adjustment

Step

Item

Mode

Adjustment

Point

Result

Remarks

Voltage

Stop

VR-11kB

24.0V

Measured

TP-1

Sys.

Con

P.C

Board

3-3/4

ips

500

1,000

Hz,

7-1/2

ips

Test

Tape.

Tape

Speed

FWD

VR-2

£0.5%

Tape

Speed

3-3/4

ips.

7-1/2

ips

1,000Hz

1,000

Hz,

7-1/2

ips

Test

Tape.

Tape

Speed

FWD

VR:3

40.5%

Tape

Speed

7-1/2

ips.

Chart

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