Adcom GFP-750 Manual de usuario

>DCOM

details

you

can

hear

GFP-750

Stereo

Preamplifier

OWNER’S

MANUAL

THE

FOLLOWING

PRECAUTIONS

AND

SAFETY

INSTRUCTIONS

ARE

REQUIREMENTS

AND

CSA

SAFETY

REGULATIONS

Warning:

reduce

the

risk

fire

electric

shock,

not

expose

this

unit

rain

moisture.

CAUTION

RISK

ELECTRIC

SHOCK

NOT

OPEN

AVIS:

RISOUE

CHOC

ELECTRICUE-NE

PAS

OUVRIR

The

graphic

symbol

lightning

flash

with

arrow

point

within

triangle

signifies

that

there

dangerous

voltage

within

the

unit

and

poses

hazard

anyone

removing

the

cover

gain

access

the

interior

the

unit.

qualified

service

personnel

should

make

any

such

attempt.

The

graphic

symbol

exclamation

point

within

equilateral

triangle

warns

user

the

device

that

necessary

refer

the

instruction

manual

and

its

warnings

for

proper

operation

the

unit.

not

place

this

unit

unstable

cart,

stand,

tripod,

bracket,

table.

The

unit

may

fall,

causing

serious

injury

child

adult,

and

serious

damage

the

unit.

Use

only

with

cart,

stand,

tripod,

bracket,

table

recommended

the

manufacturer,

sold

with

the

unit.

Any

mounting

the

device

should

the

man¬

ufacturer’s

instructions,

and

should

use

mounting

ac¬

cessory

recommended

the

manufacturer.

Read

all

the

safety

and

operating

instructions

before

connecting

using

this

unit.

Retain

this

notice

and

the

owner’s

manual

for

future

reference.

All

warnings

the

unit

and

its

operating

instructions

should

adhered

to.

All

operating

and

use

instructions

should

followed.

not

use

this

unit

near

water;

for

example,

near

bathtub,

washbowl,

kitchen

sink,

laundry

tub,

wet

basement,

near

swimming

pool.

The

unit

should

installed

that

its

location

position

does

not

interfere

with

its

proper

ventilation.

For

example,

should

not

situated

bed,

sofa,

rug,

similar

surface

that

may

block

the

ventilation

openings;

placed

built-in

installation,

such

bookcase

cabinet,

that

may

impede

the

flow

air

through

its

ventilation

openings.

The

unit

should

situated

away

from

heat

sources

such

radiators,

heat

registers,

stoves,

other

devices

(including

amplifiers)

that

produce

heat.

The

unit

should

connected

power-supply

outlet

only

the

voltage

and

frequency

marked

its

rear

panel.

The

power-supply

cord

should

routed

that

not

likely

walked

pinched,

especially

near

the

plug,

convenience

receptacles,

where

the

cord

exits

from

the

unit.

Clean

unit

only

recommended

its

Instruction

manual.

The

power-supply

cord

the

unit

should

unplugged

from

the

wall

outlet

when

unused

for

long

period

time.

Care

should

taken

that

objects

not

fall,

and

liquids

are

not

spilled,

into

the

enclosure

through

any

openings

This

unit

should

serviced

qualified

service

personnel

when:

The

power

cord

the

plug

has

been

damaged;

Objects

have

fallen,

liquid

has

been

spilled,

into

the

unit;

The

unit

has

been

exposed

rain,

liquids

any

kind;

The

unit

does

not

appear

operate

normally,

exhibits

marked

change

performance;

The

device

has

been

dropped,

the

enclosure

damaged.

NOT

ATTEMPT

SERVICING

THIS

UNIT

YOURSELF.

REFER

SERVICING

QUALIFIED

SERVICE

PERSONNEL.

ATTENTION

POUR

PREVENIR

LES

CHOCS

ELECTRIQUES

PAS

UTILISER

CETTE

FICHE

POLARI3EE

AVEC

PROLONQATEUR,

UNE

PRISE

COURANT

UNE

AUTRE

SORTIE

COURANT,

SAUF

LES

LAMES

PEUVENT

ETRE

INSEREES

FOND

SANS

LAISSER

AU-

CUNE

PARTIE

DECOUVERT.

CAUTION

PREVENT

ELECTRIC

SHOCK

NOT

USE

THIS

POLARIZED

PLUG

WITH

EXTENSION

CORD,

RECEPTACLE

OTHER

OUTLET

UN¬

LESS

THE

BLADES

CAN

FULLY

INSERTED

PREVENT

BLADE

EXPOSURE.

CAUTION

POWER

LINES

Any

outdoor

antenna

must

located

away

from

all

power

lines.

OUTDOOR

ANTENNA

GROUNDING

outside

antenna

connected

your

tuner

tuner-preamplifier,

sure

the

antenna

system

grounded

provide

some

protection

against

voltage

surges

and

built-up

static

charges.

Section

810

the

National

Electrical

Code,

ANSI/NFPA

No.

70-1984,

provides

information

with

respect

proper

grounding

the

mast

and

supporting

structure,

grounding

the

lead-in

wire

antenna

discharge

unit,

size

grounding

conductors,

location

antenna

discharge

unit,

connection

grounding

electrodes,

and

requirements

for

the

grounding

electrode.

Use

No.10

AWG

(5.3

mm^')

copper,

No.8

AWG

(8.4

mm^)

aluminum,

No.

AWG

(1.0

mm")

copper-clad

steel

bronze

wire,

larger,

ground

wire.

Secure

antenna

lead-in

and

ground

wires

house

with

stand-off

insulators

spaced

from

4-6

feet

(1.22-1.83

apart.

Mount

antenna

discharge

unit

possible

where

lead-in

enters

house.

Use

jumper

wire

not

smaller

than

No.6

AWG

(13.3

mm")

copper,

the

equivalent,

when

separate

antenna-grounding

electrode

used.

See

NEC

Section

810-21

(]).

EXAMPLE

ANTENNA

GROUNDING

PER

NATIONAL

ELECTRICAL

CODE

INSTRUCTIONS

CONTAINED

ARTICLE

810

RADIO

AND

TELEVISION

EQUIPMENT.

NOTE

CATV

SYSTEM

INSTALLER

This

reminder

provided

call

the

CATV

system

installer’s

attention

Article

820-22

the

National

Electrical

Code

that

provides

guidelines

for

proper

grounding

and,

particular,

specifies

that

the

cable

ground

shall

connected

the

grounding

system

the

building,

the

point

cable

entry

practical.

PRODUCT

DESCRIPTION

1.1.

GFP-750

Front

Panel

Diagram

Remote

Control

Stereo/Reverse/Mono

Switch

(reverse)

combine

(mono)

channels

Input

Source

Selection

Select

input

source

Passive

Mode

On/Off

Bypass

active

gain

stages

Power

On/Off

Turn

unit

and

off.

External

Processor

Engage

external

processor

Balance

Control

Adjust

balance

level

Infrared

Remote

Control

Sensor

Lens

Receiver

for

remote

control

signal

Volume

Control

Adjust

volume

level

Mute

Engage

Mute

circuitry

1.2.

GFP-750

Rear

Panel

Diagram

Balanced

Inputs

^l)

Gold

Jumpers

Unbalanced

Stereo

Inputs

Tape

Loop

Stereo

In/Out

External

Processor

Loop

Stereo

In/Out

Main

and

Main

Unbalanced

Stereo

Outputs

Main

Balanced

Stereo

Outputs

(T^

Remote

Control

Infrared

repeater

outputs

(18)

Remote

Control

Sensor

Input

Master

On/Off

Switch

Power

Cord

Socket

Switched

Outlet

1.3.

Product

Features

Stereo/Reverse/Mono

Switch

This

switch

used

change

the

polarity

the

input

signal

relation

the

output

signal.

The

stereo

setting

allows

normal

playback

the

input

signal.

The

reverse

setting

Inverts

the

phase

the

input

signal.

The

mono

setting

combines

both

channels

for

monaural

input

signal

where

speaker

placement

does

not

accommodate

stereo

playback.

Input

Selection

The

input

selection

knob

has

digital

interface

that

senses

movement

the

knob.

The

knob

appears

turn

freely

the

interface

detects

the

direction

the

knob

being

turned

and

indexes

through

the

input

sources

accordingly.

from

aux

tuner

from

tuner

aux

you

must

index

back

through

the

other

input

sources.

Passive

This

features

allows

the

active

gain

stages

the

preamp

bypassed.

slight

drop

volume

level

expected

when

this

feature

engaged.)

This

feature

has

effect

when

the

processor

feature

en¬

gaged.

Power

On/Off

The

GFP-750

turned

pressing

either

the

remote

control

power

button

toggling

the

front

panel

power

switch.

The

LED

above

the

power

switch

will

come

indicating

the

unit

on.

(The

power

status

LED

will

glow

slightly

dimmer

when

the

unit

muted.)

Processor

Switch

Engages

the

processor

loop

when

activated.

See

for

further

information.

Balance

Control

The

GFP-750

balance

control

feature

provides

finer

balance

adjustment

allowing

for

greater

balance

accuracy

and

will

not

entirely

mute

either

channel.

Infrared

Remote

Control

Sensor

Lens

This

lens

protects

the

infrared

receiver

which

receives

commands

from

the

remote

control.

The

pathway

between

the

lens

and

remote

control

must

free

obstructions

for

the

remote

control

operate

the

GFP-750.

Volume

Control

The

front

panel

volume

control

knob

motorized.

may

adjusted

either

hand

the

volume

buttons

the

remote

control.

The

volume

knob’s

groove

always

indicates

the

present

volume

level.

The

volume

control

knob

may

used

reduce

the

volume

level

while

the

GFP-750

muted

without

deac¬

tivating

the

mute

feature.

Mute

The

GFP-750's

mute

feature

engaged

pressing

the

mute

button

the

remote

control.

This

feature

fully

mutes

the

outputs.

deactivate

the

mute

feature,

press

the

mute

button

again

either

the

two

volume

buttons

the

remote

control.

(Turning

the

front

panel

volume

knob

will

not

deactivate

the

mute

feature.)

Balanced

Inputs

Before

using

the

balanced

inputs,

necessary

remove

the

gold

jumpers

located

between

pins

and

both

connectors.

(See

the

figure

the

right.)

When

switching

from

balanced

inputs

unbalanced

inputs,

you

must

replace

the

jumpers

between

pins

and

shown.

NOT

USE

BOTH

BALANCED

AND

UNBALANCED

INPUTS

THE

SAME

Time.

Gold

Jumpers

When

using

the

unbalanced

inputs,

jumpers

must

installed

short

pins

and

the

balanced

input

jacks.

Unbalanced

Stereo

Inputs

gold

jumpers

Connect

the

various

outputs

from

each

signal

source

these

unbalanced

stereo

inputs.

not

connect

both

the

unbalanced

and

balanced

inputs

the

same

time.

See

the

section

labeled

CONNECTIONS

for

further

information

regarding

these

inputs.

Tapeln/out

The

tape

outputs

are

fixed

level

outputs.

The

signal

selected

the

input

source

knob

input

buttons

the

remote

control.

{The

tape

outputs

are

muted

when

tape

selected

the

input

source

when

the

processor

loop

engaged.)

Processor

The

processor

in/out

connectors

allow

for

convenient

connection

external

processor,

ADCOM’s

GSA-700

surround

sound

processor.

The

connection

diagrams

under

Audio/Home

Theater

and

Multi-

Channel

Audio

detail

basic

connection

methods

that

take

advantage

this

feature.

When

the

processor

feature

activated

the

external

processor

controls

the

volume

and

balance

the

system.

Main

Unbalanced

Stereo

Outputs

Main

unbalanced

line

level

stereo

output

connected

the

amplifier’s

unbalanced

inputs.

Main

accommodates

second

amplifier

for

multi-room

multi-zone

operation.

Main

Balanced

Stereo

Outputs

Main

balanced

line

level

stereo

output

for

use

with

amplifiers

that

utilize

balanced

inputs.

Remote

Control

Infrared

Repeater

Output

Connect

the

ACCOM

IRA-50011

infrared

repeater

control

other

remote

controlled

equipment

via

the

remote

sensor

extension.

Remote

Control

Sensor

Input

Connect

either

the

ACCOM

XR-500II

SPM-500II

extend

the

remote

control

capabilities

the

GFP-

750

via

external

room

zone.

Master

On/Off

Switch

The

rear

panel

Master

On/Off

Switch

allows

the

unit

electrically

disconnected

from

the

power

source

without

having

remove

the

power

cord.

recommend

the

Master

On/Off

switch

pushed

the

“O”

(off)

position

when

the

unit

will

left

unat¬

tended

for

extended

period

time.

THE

GFP-750

DOES

NOT

RESPOND

REMOTE

CONTROL

COM¬

MANDS,

AND

THE

POWER

CORD

INSTALLED,

CHECK

THAT

THE

MASTER

ON/OFF

SWITCH

THE

“I”

POSITION.

2.2.

Adding

External

Processor

Note:

These

diagrams

represent

basic

audio/video

system

using

the

GFP-750

with

various

other

audio

equipment.

Additional

audio

and

video

sources

may

easily

added

the

system

following

similar

connections

shown.

Refer

your

other

owner's

manuals

for

detailed

connection

information.

TROUBLE

SHOOTING

Symptoms

Possible

Causes

Unit

does

not

respond

front

panel

-AC

power

cord

not

connected

power

switch

remote

control

power

-Master

On/Off

switch

off

button.

Power

LED

dimmer

than

the

other

-Preamp

muted.

(Power

LED

dimmed

when

outputs

are

muted.)

status

LED’s.

signal

main

outputs

-Wrong

source

selected

-The

external

processor

feature

activated

{processor

LED

on)

without

the

external

processor

either

being

connected

properly.

(The

main

outputs

are

connected

the

processor

inputs

when

the

external

processor

feature

activated.)

-Preamp

muted.

(Power

LED

dimmed

when

outputs

are

muted.)

signal

tape

outputs

Volume

level

reduced

when

going

passive

mode

-The

input

device

tape.

-The

external

processor

feature

activated.

(Processor

LED

on)

{tape

out

disconnected

when

tape

selected

the

source

the

processor

feature

activated.)

-A

slight

reduction

volume

level

expected

the

active

gain

stages

are

bypassed

when

the

passive

feature

engaged.

The

volume

and

balance

controls

not

function.

-The

volume

and

balance

controls

are

bypassed

when

the

processor

feature

engaged.

Either

use

the

controls

the

external

processor

switch

the

processor

feature

off.

CARE

AND

MAINTENANCE

The

GFP-75(Ts

steel

chassis

and

extruded

aluminum

front

panel

are

specially

coated

provided

durable

and

attractive

finish.

remove

dust

and

finger

smudges,

merely

dampen

cloth

and

wipe

off

the

chassis.

not

use

strong

solvents

detergents.

Many

are

very

abrasive

corrosive.

Never

spray

pour

any

liquid

<^to

the

chassis

front

panel.

the

event

any

liquid

getting

Into

the

chassis,

unplug

the

unit

from

the

outlet

immediately.

SERVICING

ACCOM’s

Technical

Service

Department

will

happy

answer

all

questions

pertaining

the

installation

and

operation

your

unit.

the

unlikely

event

difficulty,

please

contact

for

prompt

advice.

cannot

help

you

resolve

the

problem

Immediately,

may

refer

you

authorized

repair

agency,

authorize

the

return

your

unit

our

plant.

All

written

inquiries

should

addressed

to:

ADCOM

Service

Department

Timber

Lane

Marlboro,

07746

USA

(732)

683-2356

Phone

(732)

683-9792

Fax

Telephone

inquiries

are

welcome

from

Monday

through

Friday

between

and

PM,

Eastern

Standard

Time.

will

also

glad

answer

any

FAX

inquiries.

Please

Include

your

phone

and

FAX

numbers

can

respond.

When

inquiring

about

your

unit,

please

include

the

serial

number,

the

name

the

dealer

from

whom

you

pur-

Chased

the

unit,

and

the

date

purchase.

ask

you

return

the

unit

for

service,

will

issue

specific

Return

Authorization

UNDER

CIRCUMSTANCES

SHOULD

THE

UNIT

SHIPPED

WITHOUT

PROPER

AUTHORIZA¬

TION

PACKED

ANYTHING

OTHER

THAN

ITS

ORIGINAL

PACKING.

the

original

packing

has

been

lost,

discarded

damaged,

will

gladly

supply

replacement

packaging

nominal

charge.

Please

mention

your

need

when

you

contact

us.

quid

Always

ship

PREPAID

via

UPS

(United

Parcel

Service)

other

appropriate

earner.

FREIGHT

COLLEO

bMiH-

MENTS

WILL

REFUSED.

♦

NOT

SHIP

VIA

PARCEL

POST

the

packaging

will

not

necessarily

withstand

the

handling

our

h’ostai

Service.

GFP-750

SPECIFICATIONS

Output

Level

(Rated)

.ov

THD+N

Rated

Output

(20Hz

20kHz)

Balanced.<0.025%

Unbalanced.:.<0.095%

THD-t-N

Rated

Output

(1kHz)

Balanced.<0.015%

Unbalanced.<0.017%

Output

Impedance

Balance.<1200Q

Unbalanced

Outputs.

GOOCl

Input

Impedance

Balanced.94kQ

Unbalanced.47kli

Frequency

Response

(Balanced

and

Unbalanced)

20Hz

20kHz.+0,

-0.25dB

Distortions

Rated

Output)

CCIF

from

4kHz

20kHz

(Balanced).

<0.009%

CCIF

from

4kHz

20kHz

(Unbalanced).<0,035%

SMPTE

(Balanced).<

0.05%

SMPTE

(Unbalanced).<

0.05%

Signal

Noise

Ratio

(Ref.

volt)

“A”

Weighted

(Balanced).>102dB

“A”

Weighted

(Unbalanced).>102dB

input

Sensitivity

Rated

Output)

Balanced.183mV

Unbalanced.365mV

GENERAL

SPECIFiCATiONS

Power

(available

230V

special

order)

Power

Consumption.

Chassis

Dimensions.

Maximum

Dimensions.

Weight.

Weight,

Packed.

115VAC-50/60HZ

.30

1/2”

(89mm)

17"

(432mm)

11"

(279mm)

1/8"

(105mm)

17"

(432mm)

12”(305mm)

.15

lbs

(6.8kg)

.17

lbs.

(7.7kg)

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