Sharp GF-777H Manuel utilisateur

SHARP

SERVICE

MANUAL

ATSM881115RCS

GF-777H

GF-777E

the

interests

user-safety

the

set

should

restored

its

original

condition

and

only

parts

identical

those

specified

used.

PHOTO:

GF-777H

FEATURES

Multi-Amp

3-Way

6-Speaker

System

Massive

90W

PMPO

Dynamic

Super

Woofer

Sound

16cm

(6%"")

Woofer

with

Rigid

Speaker

Ring

Horn

Tweeter

for

Clear,

Crisp

Highs

Two

Decks

Side

Side,

for

Versatile

Record/Playback

Soft-Touch

Cassette

Controls

Brilliant

Metal

Tape

Sound

APLD

(Auto

Program

Locate

Device)

Sharp Super

Noise

Reduction

System

INDEX

CONTENTS

SPECIFIGATIONS,

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POWER

SUPPLY/AG-SUPPLY.

VOLTAGE.SELECTOR,

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NAMES

PARTS

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3,4

DISASSEMBLY

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MECHANICAL.

ADJUSTMENT

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NOTES

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EQUIVALENT

CIRCUIT

INTEGRATED

CIRCUIT

....................

36,

PACKING

METHOD

(GE-777E

Only)

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REPLACEMENT

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Back

SHARP

CORPORATION

Osaka,

JAPAN

GF-777H

FOR

COMPLETE

DESCRIPTION

THE

OPERATION

THIS

UNIT,

PLEASE

REFER

THE

OPERATION

MANUAL

SPECIFICATIONS

GENERAL

TAPE

RECORDER/PLAYER

Power

source:

110/220/240V

50/60Hz

Tape:

Philips-type

compact

cassette

tape

15V

(UM/SUM-1,

R-20,

HP-2,

Frequency

response:

30Hz

18000Hz

(Metal

tape)

“D’’

battery

10,

external

30Hz

17000Hz

(CrO,

tape)

supply)

30Hz

14000Hz

(normal

tape)

Speakers:

Super

Woofer;

16cm

(6-1/2")

S/N

ratio:

56dB

(SNRS:

ON,

METAL

TAPE)

Woofer;

16cm

(6-1/2")

Wow

and

flutter

(DIN

45511):

Tweeter;

Horn

type

0.14%

Output

power:

(GF-777H)

(DIN

45324)

Input

sensitivity

and

input

impedance:

MPO

28W,

supply

operation,

Ext.

Mic;

600

ohms

with

four

amplifiers

Mixing

mic;

600

ohms

RMS

24W,

supply

operation,

Line

in;

0.1V/100k

ohms

with

four

amplifiers

Output

level

and

loaded

impedance:

(GF-777E)

MPO

45W,

supply

operation,

Headphones;

ohms

with

four

amplifiers

External

speaker;

ohms

RMS

24W,

supply

operation,

Line

out;

0.6V/47k

ohms

with

four

amplifiers

Semiconductors:

17-IC’s

RADIO

52-Transistors

Frequency

range:

LW;

150

—285kHz

1-FET

MW;

520

—

1620kHz

1-SCR

SW;

5,95

—

18MHz

61-Diodes

FM;

87,6

—

108MHz

11-LED’s

Dimensions:

Width;

752mm

Depth;

166mm

Height;

379mm

Weight

(without

batteries):

12.2kg

POWER

SUPPLY

The

GF-777H/E

Unit

will

operate

mains

supply

110

Volts,

220

Volts,

240

Volts

50Hz

6OHz.

For

portable

use

will

operate

its

internal

batteries,

from

external

Volts

supply

(with

adaptor).

SUPPLY

VOLTAGE

ADJUSTMENT

The

Voltage

Selector

setting

should

checked

see

that

conforms

the

local

supply

voltage.

This

must

done

before

plugging

the

supply.

Adjustment

made

turning

the

adjusting

screw

either

direction

with

minus

headed

screwdriver

until

reading

Selector

matches

the

local

supply

voltage.

Caution:

Use

this

unit

only

the

specified

voltages,

otherwise

damage,

fire,

accidents

may

caused.

SHARP

cannot

responsibility

for

any

damage

resulting

from

the

use

this

unit

unspecified

voltages.

aOBWN

16.

17.

18.

19.

20.

32.

33.

34.

35.

36.

37.

38.

Deck

Cassette

Compartment

Deck

Cassette

Compartment

Super

Woofer

Sound

Control

(Left)

Super

Woofer

Sound

Control

(Right)

Tweeter

(Left)

Deck

Cassette

Ejection

Key

Deck

Playback

Key

Deck

Stop

Key

Deck

Rewind/Review

Key

Deck

Cut

Key

Deck

Tape

Counter

Deck

Tape

Counter

Reset

Button

—

SOMND

NAMES

PARTS

Woofer

(Left)

Super

Woofer

(Left)

Deck

Monitoring

Socket

Mixing

Microphone

Socket

Headphones

Socket

11.

12.

13.

14.

15.

Super

Woofer

(Right)

Woofer

(Right)

Tweeter

(Right)

Built-in

Microphone

For

Left

Channel

Recording

Built-in

Microphone

For

Right

Channel

_Recording

Double

Cassette

2A:

22.

23.

24.

25;

Stereo

Recording

Level

Control

(Left)

Stereo

Recording

Level

Control

(Right)

Recording

Mode

Switch

Dubbing

Switch

Meter/Battery

Indicator

839

Figure

3-1

Were

uble

‘cassette

Deck

Fast

Forward

Wind/Cue

Key

26.

Deck

Playback

Key

Deck

Pause

Key

Deck

Editing

Key

Deck

Pause

Key

Deck

Record

Key

22 23

Figure

3-2

27.

Deck

Stop

Key

28.

Deck

Rewind/Review

Key

29.

Deck

Cut

Key

30.

Deck

Fast

Forward

Wind/Cue

Key

31.

Deck

Ejection

Key

27°

«28

39.

VU/Meter/Tuning

Indicator

40.

Deck

Tape

Selector

Switch

41.

Deck

Tape

Selector

Switch

42.

SNRS

Switch

43.

Meter

Selector/Dial

Light

Switch

44.

Mode/FM

Muting

Switch

45.

Wave

Band

Selector

Switch

46.

Radio

Echo

Indicator

47.

Dubbing

Indicator

48.

Stereo

Broadcast

Indicator

49,

Fine

Tuning

Control

50.

Tuning

Control

51.

APLD

Input

Buttons

ave

Figure

3-3

52.

APLD

Indicators

56.

Echo

Control

60.

Treble

Tone

Control

53.

Function

Switch

57.

Microphone

Fader

Control

61.

Channel

Balance

Control

54.

Deck

Mode

Selector

Switch

58.

Tape

Fading

Control

62.

Cutput

Volume

Control!

55.

Mixing

Switch

59.

Bass

Tone

Control

63.

Loudness

Switch

Figure

4-1

64.

Power

Switch

70.

Grounding

Terminal

76.

Battery

Compartment

65.

Power

Indicator

71.

Remote

Start/Stop

Control

Socket

77.

Beat

Interference

Cancelling

Switch

66.

Antenna

Terminals

72.

External

Microphone

Socket

78.

External

Super

Woofer

Sockets

67.

Input

Selector

Switch

73.

Supply

Voltage

Selector

79.

External

Main

Speaker

Sockets

68.

Line

Output

Sockets

74.

Volt

Terminal

80.

Telescopic

Antenna

69.

Record

Player

Input

and

75.

Supply

Input

Terminal

Line

Input

Sockets

68 67

6970

«7574

76 79

7778

Figure

4-2

DISASSEMBLY

Caution:

Prior

the

disassembly,

sure

draw

the

mains

lead

cassette

compartment

with

cassette

tape.

plug

from

the

mains

socket

the

unit

and

unload

the

Removal

Front

Cabinet

and

Back

Cabinet

Remove

one

tuning

control

knob,

one

fine

tuning

control

knob,

one

volume

control

knob,

two

record

control

knobs,

six

other

control

knobs,

one

deck

mode

selector

knob,

one

wave

band

selector

knob

and

other

ten

selector

knobs.

Then

remove

two

punching

metals

and

two

super

woofer

sound

control

knobs.

See

Fig.

4-3.

Remove

nine

screws

the

front

cabinet

and

back

cabinet.

See

Fig.

5-1.

Open

the

back

cabinet,

and

withdraw

two

antenna

lead

tips

(white,

black)

from

the

cabinet

inside.

See

Fig.

5-2.

Remove

one

socket

from

the

power

P.W.B.

located

the

——

lower

the

back

cabinet.

See

Fig.

5-3.

Figure

4-3

Figure

5-2

Removal

Main

Frame

Remove

five

sockets

the

power

amplifier

P.W.B.

See

Fig.

5-4.

Remove

three

screws

the

main

frame,

two

screws

the

power

switch

holder,

one

screw

the

power

amplifier

P.W.B.,

three

screws

the

headphone/microphone

P.W.B.

and

one

socket

the

echo

P.W.B.

Then

hold

the

main

frame

remove.

See

Fig.

5-5.

Figure

5-1

Figure

5-5

alias

Figure

5-3

Removal

Mechanism

Block

Remove

three

sockets

the

mechanism

P.W.B.,

two

sockets

the

record/playback

P.W.B.

and

one

socket

the

bias

current

P.W.B.

See

Fig.

6-1

and

6-2.

Detach

the

tape

counter

drive

belt

from

the

tape

take-up

reel

disk.

Remove

four

screws

the

mechanism

block,

and

shift

the

mechanism

block

forwards

and

detach.

See

Fig.

6-3.

Figure

6-1

Figure

6-2

Figure

6-3

Removal

Tuner

Frame

Remove

one

socket

the

tuner

P.W.B.

See

Fig.

6-4.

Loosen

three

tabs

securing

the

dial

scale

plate,

and

detach

the

plate

while

shifting

down.

See

Fig.

6-5.

Remove

three

screws

the

tuner

frame,

and

detach

the

frame

while

shifting

right.

See

Fig.

6-6.

RARBERBAE

ao.

Amar

weeeeeter

Figure

6-5

Removal

Power

Amplifier

P.W.B.

Remove

one

screw

and

two

tabs

the

super

woofer

sound

control

P.W.B.,

and

one

screw

the

power

amplifier

P.W.B.

Then

hold

the

power

amplifier

P.W.B.

remove.

See

Fig.

6-7.

Figure

6-7

Figure

7-1

Figure

7-2

Figure

7-3

Removal

Record/Playback

P.W.B.

Remove

two

screws

the

APLD

P.W.B.

and

four

tabs

the

indicator

P.W.B.

holder.

See

Fig.

7-1.

Remove

three

tabs

the

bias

current

P.W.B.

See

Fig.

7-2.

Remove

two

screws

the

input/output

terminal

board.

See

Fig.

7-1.

Remove

one

nut

and

one

screw

the

record/playback

P.W.B.

See

Fig.

7-3.

Withdraw

the

record/playback

P.W.B.,

and

remove

two

screws

and

two

tabs

the

angle

supporting

the

volume

P.W.B.

See

Fig.

7-4.

Remove

two

tabs

the

APLD

switch

P.W.B.

Thus

Figure

7-4

possible

detach

the

record/playback

P.W.B.

and

volume

P.W.B.

from

the

main

frame.

See

Fig.

7-4.

Removal

Power

P.W.B.

Remove

four

screws

the

power

transformer

and

two

screws

the

socket.

Then

detach

the

power

P.W.B.

See

Fig.

7-5.

Figure

7-5

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Figure9

BLOCK

DIAGRAM

MECHANICAL

ADJUSTMENT

Pinch

Roller

Pressure

Check

Set

the

unit

play

mode.

Push

tension

gauge

500

into

the

pinch

roller

lever

make

the

pinch

roller

off

the

capstan,

and

release

the

gauge

applied

force

gently

that

the

pinch

roller

sets

back

the

capstan

(the

pinch

roller

again

rotates).

the

time,

the

tension

gauge

reading

must

300

380

the

step

unsatisfied,

bend

the

pinch

roller

pressure

spring

properly,

renew

it.

TORQUE

CHECK

PLAY,

FAST

FORWARD

AND

REWIND

MODES

Put

torque

meter

cassette

the

cassette

compartment

the

set,

and

see

that

the

measured

torque

each

mode

normal

follows:

Mode

Torque

meter

cassette

Measured

torque

Playback

TW-2111

gram-cm

Fast-forward

TW-2231

135

gram-cm

TW-2231

135

gram-cm

Tw-2231

TwW-2111

Figure

10-2

GAP

CHECK

PINCH

ROLLER

LEVER

Place

the

set

play

mode,

and

see

that

the

pinch

roller

lever

moves

create

the

gaps

(A),

(B)

and

shown

Fig.

10-3.

Play

Release

Lever

Pinch

Roller

Lever

Figure

10-3

Tape

Speed

Adjustment

Reproduce

test

tape

(TEAC,

MTT—111,

kHz-

prerecorded)

—

the

playback

must

the

middle

the

tape

but

not

either

the

beginning

the

end.

Connect

wow/flutter

meter,

across

100K

ohm

resistor,

the

line

output

socket.

Adjust

the

semi-variable

resistor,

using

plastic

screwdriver

via

the

hole

the

motor

unit

bottom,

that

the

playback

frequency

will

2,985

3,015

(Deck

and

2,970

3,000

(Deck

2).

Note:

The

motor

pulley,

flywheel

drive

belt,

flywheel,

take-up

pulley,

take-up

idler

and

take-up

turntable,

etc.

must

free

any

contamination.

Figure

10-4

~10—

Ce manuel convient aux modèles suivants

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