Fisher CA-890 Manuel utilisateur

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wll

—

SERVICE

MANUAL

}

WITH

#

WIRELESS

Rt

REMOTE

CONTROL

cick

:

-890

‘Integrated

—

‘Stereo

Amplifier

(EUROPE)

132

301

40

NOTE:

This

model

is

supplied

with

the

Remote

Control

REM-890.

For

details,

refer

to

the

Remote

Contro!

REM-890

of

the

Service

Manual

(WM-17355).

WM-17154

CONTENTS

Functional

Block

Diagram

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5

Explanation

of

Function

(TMP4270N)

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CPU

TMP4270N

Port

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Explanation

of

Functions

(TMP47C400N)

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(TMP47C400N)

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10

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Amplifier

Adjustment

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

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NOTE:

Schematic

Diagram

is

separately

attached

to

this

manual.

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‘OF

SPECIFICATIONS

POWER

AMPLIFIER

SECTION

Minimum

RMS

sine

wave

power

per

channel

within

stated

bandwidth

at

no

more

than

stated

150

Watts

distortion

and

with

8-ohm

load

Power

Bandwidth

20

Hz

—

20

kHz

Total

Harmonic

Distortion

0.02

%

I.M.

Distortion

0.02

%

Speaker

Damping

>20

PREAMPLIFIER

SECTION

Frequency

Response

Phono

(RIAA)

+1

dB

Aux

(20

Hz

—

20

kHz)

+1dB

Input

Sensitivity

and

Impedance

Phono

2.5

mV/50

kQ.

VCR

Tape

Monitor

1,2

150

mV/50

kQ

Tuner/TV/CD/Aux

art

150

mV/50

kQ.

i.

Phono

Max.

Input

Capability

140

mV

Parametric

Equalizer

25

Hz

—

800Hz

+12dB

600

Hz

-

20kHz

+12dB

High

Filter

(Above

10

kHz)

—6dB/Oct.

Subsonic

Filter

(Below

10

Hz)

—12dB/Oct.

Loudness

Contour

(100

Hz/10

kHz)

+8

dB/

+4

dB

Hum

&

Noise

({HF

Short

Circuit,

A

Network)

[

Phono

80

dB

VCR/Tape

Monitor

1,2

95

dB

Tuner/TV/CD/Aux

95

dB

GENERAL

Power

Requirements

(50Hz)

110/220V

AC

Power

Consumption

700

Watts

AC

Outlets

2

Dimensions

(W

x

H

xD)

440

x

140

x

320

mm

Weight

(approx.)

11.8kg

Because

its

products

are

subject

to

continuous

improvement,

Fisher

Corporation

reserves

the

right

to

modify

product

designs

and

specifications

without

notice

and

without

incurring

any

obligation.

CIRCUT

DESCRIPTION

The

CA-890

has

the

following

features:

Full

Remote

Control/Auto

Function

Selection

_

AV-Compatible

High

Output

Power

Amplifier

(150W

x

2)

Built-in

Parametric

Equalizer

Multi-Protection

circuit

aos

1.

Full

Remote

Control/Auto

Function

Selection

The

infrared

remote

control

can

be

used

for

control

of

46

different

audio

system

functions

—

that

is,

practically

ail

functions.

Also,

auto

function

selection

and

synchronized

recording

are

possible

not

only

with

manual

operation

but

also

by

remote

control.

In

order

to

make

this

possible,

two

types

of

microprocessors

have

been

developed;

a

main

microprocessor

{4k-byte

ROM

capacity)

and

a

sub

microprocessor

(1k-byte).

The

main

microprocessor

is

built

into

the

amplifier,

and

sub

microprocessor

are

mounted

in

the

components

(tuner,

CD

player,

turntable,

cassette

deck).

These

microprocessors

exchange

data

mutually.

As

shown

below,

the

main

and

sub

microprocessors

are

connected

by

two-way

data

buses.

When

the

remote

contro!

is

used

and

auto

function

selection

is

performed,

the

function

indicator

flashes

(CD

player,

cassette

deck,

turntable).

Directly

before

access

is

completed

and

sound

is

output,

the

indicator

stops

flashing

and

remains

lit,

thus

allowing

safe

remote

control

even

at

a

distance.

DaTa

CLock

ReaDY

—

REQuest

GND.

Main

Sub

Microprocessor

Microprocessor

Data

is

transferred

in

serial

by

clock

synchronization,

and

the

READY

and

REQ

lines

are

used

for

control

of

interruption

in

order

to

assure

proper

operation.

2.

AV-Compatible

The

CA-890

is

equipped

with

TV

and

VCR

input

jacks

and

output

jacks

for

VCR

recording,

making

it

possible

to

use

the

CA-890

to

construct

a

full

AV

system.

There

are

also

DIN

terminals

for

extracting

information

on

the

status

of

the

audio

components,

which

when

used

permit

the

display

of

the

status

on

the

TV

screen.

3.

High

Output

Power

Amplifier

(1

50W

x

2)

A

triple

cascode

is

used

in

the

first

stage,

preventing

deterioration

of

the

THD

due

to

changes

in

the

signal

source

impedance,

that

is

in

the

volume

position.

Also,

as

each

of

the

three

cascodes

uses

a

1-chip

dual

transistor,

the

structure

is

electrically

and

thermal

well

balanced

and

stable.

For

the

final

stage,

a

large

PC200W

epitaxial

planar

transistor

is

operated

by

single

push,

obtaining

150W

at

20

~

20kHz

with

THD

of

below

0.02%.

Current

mirror

chip

OUT

Vi

converter

chip

Differential

amp

chip

+IN

—IN

Triple

cascode

4.

Parametric

Equalizer

The

CA-890

uses

the

same

highly

successful

parametric

equalizer

as

was

used

on

the

CA-276.

Any

two

frequencies

can

be

varied

independently

by

+12

dB.

The

frequency

range

is

from

20

~

800Hz

in

the

low

band,

and

from

600

~

20kHz

for

the

high

band.

Q

is

fixed

at

1.2.

5.

Protection

Circuits

The

CA-890

is

equipped

with

three

different

protection

circuits,

protecting

against

a

variety

of

problems.

®

DC

detection

(speaker

protection)

The

speaker

jacks

are

cut

off

at

the

relay

if

a

DC

voltage

of

3V

or

greater

is

generated.

@

Temperature

dectection

(amplifier

protection)

If

the

temperature

of

the

radiator

reaches

120°C

(equivalent

to

power

transistor

junction

temperature

of

150°C),

this

is

detected

by

a

posistor

and

the

speaker

jacks

are

cut

off

at

the

relay.

@

Load/short-circuit

protection

(amplifier

protection)

If

the

speaker

jacks

are

short-circuited

or

they

are

connected

to

a

low

impedance

load,

the

ASO

limiter

is

activated

and

the

power

transistor

is

protected.

If

certain

conditions

in

the

relation

of

the

power

transistor

current

and

load

impedance

are

fulfilled,

this

ASO

limiter

interrupts

the

input

signals

using

the

muting

circuit.

+Va

+e

Volt

Amp.

7—a-

OUT

EXPLANATION

OF

FUNCTION

(TMP4270N)

System

Outline

of

TMP4270N

This

program

operates

an

audio

full

remote

control

system

SUB

CPU.

The

system

configuration

is

as

follows.

SUB1

|

es

TUNER

<“—

|

TMP4270N

C’

Main

Unit

aoe

DECK

“—|

1MP4270N

eae:

leses|

Main

Unit

Main

CPU

TMP47C400

ee

anes

CD

PLAYER

TMP4270N

Pees,

Sa

Main

Unit

RECORD

<>

Rae

C)

/)\\

PLAYER

[=

|S

Mainunit

Main

Micro-processor

Control...

Outputs

serial

data

received

from

the

main

micro-processor

to

the

appropriate

mode

key.

Main

Unit

Key

Control...

Transmits

the

main

unit

function

key

and

Mute

inputs

to

the

main

micro-processor.

Transmission/Reception

The

sub

micro-processor

carries

out

8

bit

serial

data

reception

and

transmission

with

the

main

micro-processor.

!t

takes

data

from

the

main

micro-processor

and

emits

a

100ms-wide

pulse

to

the

corresponding

port.

When

the

tact

switches

installed

connected

to

each

port

are

depressed,

the

corresponding

data

are

transmitted

to

the

main

micro-processor.

The

following

ports

are

used

for

data

transmission

and

reception.

DATA

|

CLOCK

READY

|

REQUEST

|

Assignment

Transmission

from

Main

to

Sub

Micro-processors.

1.

Main

micro-processor

emits

a

REQ

signal,

and

waits

approximately

3ms

for

sub

micro-processor

to

receive

REQ

signal.

Sub

micro-processor

enters

data

standby

mode

when

REQ

signal

is

active.

Data

and

clock

signals

are

transmitted

from

the

main

micro-processor.

The

Sub

micro-processor

matches

the

clock

signal

and

reads

the

data.

:

Main

micro-processor

clears

the

REQ

and

moves

on

to

the

next

assignment.

Sub

micro-processor

checks

data

_

received

after

°

acknowledging

the

REQ

CLEAR

and

emits

100ms-wide

pulses

to

the

port

corresponding

to

the

data

code.

If

the

data

is

invalid

or

incomplete,

the

sub

micro-

processor

moves

on

to

the

next

assignment

without

doing

anything.

Checks

only

signals

received

from

the

main

micro-

processor

during

generation

of

the

100ms-wide

pulses.

In

the

event

that

valid

data

is

once

again

received

during

pulse

generation,

the

sub

micro-processor

shuts

the

pulse

off

for

a

30ms

period

and

emits

100ms-wide

pulses

corresponding

to

the

new

data

code.

Reception

check

at

this

time

also.

Transmission

from

Sub

to

Main

Micro-processors.

(DECK,

PLAYER,

etc.,

switches

depressed,

or

MUTE

at

low)

Sub

micro-processor

emits

a

REQ

signal

and

waits

2ms

for

the

unit

to

enter

the

READY

mode;

if

the

unit

does

not

enter

the

READY

mode

within

the

designated

time

period,

the

sub

micro-processor

clears

the

REQ

and

proceeds

to

the

next

assignment.

When

the

Main

micro-processor

detects

the

REQ

signai,

it

emits

a

READY

signal

within

2ms

and

enters

data

standby

mode.

If

after

the

sub

micro-processor

has

detected

a

READY

signal

it

does

not

detect

data

within

a

certain

period

of

time

(designated

differently

for

each

mode),

it

transmits

data

with

the

clock

signal

off.

After

this,

it

transmits

both

data

and

clock

signals,

waits

for

the

READY

signal

to

go

off

once

data

transmission

has

been

completed,

and

clears

REQ.

If

the

main

micro-processor

picks

up

the

data,

a

READY

signal

is

cleared.

Main

micro-processor

checks

the

data

and

switches

the

corresponding

function,

transmitting

a

code

to

the

sub

micro-processor

if

necesary.

1.

Transmission

and

Reception

Timing

1.

Transmission

from

Main

to

Sub

Micro-processors

2.

There

is

no

transmission

during

reception

from

the

main

micro-processor

or

during

output

of

received

data

to

ports.

3. In

the

event

that

new

data

is

received

from

the

main

micro-processor

during

output

of

received

data

to

ports,

the

Main

new

data

is

processed

by

shutting

off

port

output

for

30ms.

REQ.

Tuner

Key

ON

AK

[

|

DATA

=

OFF

:

i

!

I

!

1

|

|

I !

CLOCK

LULL

LA

B

Key

ON

OFF

i

I

(SUB

picks

up

data

at

signa!

low)

!

I

!

\

'aAKey!

'BkKey,

Input

count

input

count

2.

Transmission

from

Sub

to

Main

Micro-processors

|

!

|

A

Key

B

Key

Transmission

Transmission

Sup

®

Input

countis

30ms.

REQ.

app.

800ms

1.

FM/MW

key

functions

even

during

other

key

inputs.

2.

!f

two

or

more

keys

are

pressed

at

the

same

time,

the

port

DATA

with

the

smaller

port

number

takes

precedence.

one

Key

CLOCK

Key

input

is

received

at

decks

1

and

2

separately.

Z

The

timing

of

two

different

key

inputs

is

the

same

for

the

Tuner.

However,

this

is

not

the

case

for

the

REC-

PLAY

Tere

mode.

BEADY

3.

STOP

KEY

input

is

transmitted

if

2

or

more

different

keys

are

pressed

at

the

same

time

(excluding

REC-PLAY).

<>

4.

Only

the

REC

key

input

is

not

transmitted.

within

2ms

CD

Player

Key

Akey

ON

eae

OFF

j

(SUB

DATA)

!

I

TUNER

|

l

!

a

@

Transmission

sub-

B

Key

al

ied

gy

DECK

!

mode

is

determined

'

y

|

I

by

the

data

signal.

|

A

key

|

i

Data

signals

already

1

count

CD

PLAYER

=]

|

at

low

are

transmitted

-—

directly.

#

PLAYER

|

A

Key

Be

Transmission

®@

No

acknowledgement

if

all

key

inputs

are

not

turned

off.

Sub

Micro-processor

Transception

and

Key

Read

1.

If

two

or

more

keys

are

pressed

at

the

same

time,

the

port

Transception

1.

Key

inputs

are

not

acknowledged

during

main

micro-

processor

transception.

Key

inputs

are

also

not

acknowledged

during

output

of

received

data

to

ports

(i.

e.,

during

emission

of

100ms-

or

2.

30ms-wide

pulses).

3.

with

the

smaller

port

number

takes

precedence.

Eee

Player

Key

The

timing

of

two

different

key

inputs

is

the

same

for

the

CD

Player.

The

STOP

KEY

functions

even

during

other

key

input.

lf

two

or

more

keys

are

pressed

at

the

same

time,

the

port

with

the

smaller

port

number

takes

precedence.

SUB CPU

TMP

4270N

ASSIGNMENT

COMMON

DaTa

DaTa

DaTa

DaTa

DaTa

CLockK

CLock CLock

CLock

CLock

ReaDY

ReaDY

ReaDY

ReaDY ReaDY

REQuest

REQuest

REQuest

REQuest

RE

Quest

ee

=

STOP

STOP

1

STOP/PAUSE

Pt

=

START

FF

1

START

=

CUE

UP/DOWN

FR

1

-

i

/

PAUSE

1

7

P2o

MUTE

IN

MUTEIN

.

MUTE

IN

MUTE

IN

P21

DO04

Low

High High

P22

DO6

Low

High

Low

P30

REC

1

P31

PLAY

F

1

P32

PLAY

R

1

P33

DECK

1

P4o

STOP

2

P4;

FF

2

P42

FR2

P43

PAUSE

2

con

ies

———E

24

P50

REC

2

25

P51

PLAY

F2

PROGRAM

26

P52

PLAY

R2

FF

(Continuous)

27

P53

_

DECK

2

FB

(Continuous)

MUTE

ON

1

(H)

MUTE

IN

—

DC

MUTE

OFF

0

(L)

Nothing

MUTE

OFF

MUTE

OFF

MUTE

OFF

EXPLANATION

OF

FUNCTION

(TMP47C400N)

System

Outline

of

TMP47C400

This

program

operates

an

audio

full

remote

control

system

MAIN

GPU.

The

system

configuration

is

as

follows.

TUNER

TMP4270N

Remote

Control

Device

[ee

)

I]

wainccpu

DECK

TMP4270N

TMP47C400

vA

a»

=

Laeeay

emo

emo

TMP4270N

Amplifier

Keys

System

Configuration

Remote

Contro

Device

Control

...

The

remote

contro

device

uses

infrared

rays

to

signal

commands

that

are

picked

up

by

the

main

unit

and

displayed

on

the

CRT.

Main

Unit

Key

Control...

Carries

out

control

via

the

main

unit

function

keys

and

Mute

(key

inputs),

transmitting

the

contents

to

the

CRT.

Individual

Component

Key

Control

...

The

TMP4270N

SUB

CPUs

installed

on

each

component

provide

serial

transmission,

control,

and

transmission

of

contents

to

the

CRT.

The

Auto-function

Function...

With

this

function,

all

Tuner

key

operation,

Phono

and

CD

Start,

and

Deck

Play

can

be

initiated

from

the

remote

contro!

device;

also,

the

Function

switch

can

be

changed

and

a

PLAY

signal

can

be

output

to

the

designated

component

and

a

STOP

signal

to

all

other

components

upon

serial

reception

from

one

of

the

SUB

CPUs.

:

Synchro

RECORD

Function...

Using

either

the

remote

control

device

or

the

deck

main

unit

to

put

deck

1

on

REC-PLAY

with

the

Synchro

switch

in

the

ON

position

automatically

puts

the

unit

in

the

REC-

PAUSE

mode.

If

the

CD

or

phonograph

record

is

then

played,

a

PAUSE

command

is

output

to

deck

1

and

the

unit

enters

the

record

mode

whenever

the

MUTE

signal

is

low.

MAIN

CPU

PORT

DESIGNATIONS

(TMP47C400N)

TMP47C400N

Vpp

Electrical

Volume

Analog

Switch

Function

Data

Clock

Clock

Sub-seriaj

Strobe

Data

Input

Sub-serial

MUTE

Data

Output

Sub-serial

Requesi

Sub-serial

REP

Output

Remote

Control

Signal

Input

Ready

Output

Sub-serial

VCR

MUTE

Output

POWER

Output

Strobe

CRT

Serial

Output

Matrix

Output

Clock

CRT

Serial

Output

Data

CRT

Serial

Output

—10-