Pioneer SA-5800 User manual

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1

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In

this

photo

you

can

see

Model

SA-5800

Service

anual

STEREO

AMPLIFIER

A-58S00

A-50&

Q)

PIONEER’

Both

Model

SA-5800

and

Model

SA-508

have

the

same

basic

performance.

The

major

difference

is

in

appearance,

Model

SA-5800

being

fitted

with

wooden

side

cover

and

top

cover,

while

Model

SA-508

employs

metal

cover.

The

following

table

is

displayed

on

the

SA-5800

and

SA-508.

MODEL

SA-5800

KU

120V

only

U.S.A,

model

KC

120V

only

Canada

model

MODEL

SA-508

This

service

manual

is

applicable

to

the

KU

type

of

the

Model

SA-5800

and

the

Model

SA-508.

When

re-

pairing

the

KC

type

of

the

Model

SA-5800

and

the

S

type

of

the

Model

SA-508,

please

see

the

additional

service

manual

(ART-373),

and

for

HE, HB,

HP

types

of

the

SA-508,

please

see

the

additional

service

manual

(ART-374).

CONTENTS

1.

SPECIFICATIONS

.......0.

ccc

cece

eee

ee

3

9.

SCHEMATIC

DIAGRAM,

P.C.

BOARD

2.

FRONT

PANEL

FACILITIES..............

4

PATTERNS

AND

PARTS

LIST

3.

BLOCK

DIAGRAM.................-...

6

9.1

Miscellanea

..

2...

.

ee

ee

14

4.

CIRCUIT

DESCRIPTIONS................

6

O12

“Schematic

Disgaea

awsansie

ks

bis

5.

DISASSEMBLY

.........---c0--ee-

00.

8

9.3.

P.C.

Board

Connection

Diagram..,......

18

6.

ADJUSTMENTS.

.........--00e

cece

cee.

9

9.4

Parts

List

of

P.C.

Board

Assemblies.......

21

PPAR

eNCCRTGN

cacti

,

.

(OAPACKING

3

Daaaue

ecu

cde

kh

nin

ate,

ahem

23

SEVERODED

VIEW

oak

okie:

ye

11.

SUPPLEMENTS

FOR

MODEL

SA-508/KU.....

23

1.

SPECIFICATIONS

Semiconductors

ICS

ci

ieee

he

oS oR

ee

See

en

MA

aa

eae

3

TETANSIStOPS

<4.

8.

eb

oe

BA

els

ee

Ee

eck

24

DIOdES.

wie

ekg

oe

ete

et

in

eed

Cee

ELS

18

Amplifier

Section

Continuous

Power

Output

of

25

watts*

per

channel,

min.,

at

8

ohms

from

20

Hertz

to

20,000

Hertz

with

no

more

than

0.03

%

total

harmonic

distortion

or

25

watts

per

channel

at

4

ohms

from

20

Hertz

to

20,000

Hertz

with

no

more

than

harmonic

distortion.

Total

Harmonic

Distortion

(20

Hertz

to

20,000

Hertz,

8

ohms,

from

AUX)

continuous

rated

power

output

..

No

more

than

0.03%

12.5

watts

per

channel

power

output

Bitrate

ale

senses

Md

hte

suatSs

No

more

than

0.03%

0.05%

_

total

i

hace

te

tee

eto

aes

No

more

than

0.03%

Intermodulation

Distortion

(50

Hertz:

7,000

Hertz

=

4:1,

8

ohms,

from

AUX)

continuous

rated

power

output

..

No

more

than

0.03%

12.5

watts

per

channel

power

output

SEEACRESAE

aa

ae

Baus

S74

No

more

than

0.03%

te

Dad

canoe

inch

ch

noes

No

more

than

0.03%

Output

SPOaken

sescescw

ge

dees

WA

RAG

aden

eee

ae

A,

B,

A+B

4~16

ohms

Headphones..............00055

Low

impedance

Damping

Factor

(1,000

Hertz,

8

ohms)...........

30

Input

(Sensitivity/Impedance)

PHONO?

6.05

snide

See

tren

hed

Beek

&

2.5mV/47kilohms

TUNER:

2

fn.

ee

a

eee

ete

150mV/S50kilohms

AUX

23.5

Spee

oe

Se

Ee

oes

eek

150mV/50kilohms

TAPE:PLAY

©

os

ecdee

es

dete

tenet

150mV/50kilohms

TARE

PEAY

200.0

ch

oan

ee

a?

150mV/50kilohms

Phono

Overload

Level

(T.H.D.

0.1%

1,000Hz)

PHONO?

0 2

seca

tnaeeu

sete

Ss

oes

140mV

Output

TAPE

RECA.

oug

wie

iat

Srentnscihen

ed

anh

eves

Jeane

150mV

TAPE

REG

2...

ge

tee

ead

ks

kd

ae

150mV

Frequency

Response

PHONO

(RIAA

Equalization)

ot,

ase

ae

Fe

30Hz

to

15,000Hz

+0.5dB

Da

Gua?

Bae

eas

20Hz

to

40,000Hz

+2dB

Tone

Control

BASS

ss

ws

Pace

ee

eds

+7,5dB,

—

7.5dB

(100Hz)

TREBLE

+

-i6

gs

aeeceshess

+8dB,

—8dB

(10kHz)

SA-5800

Subsonic

Filter...

...........0004

15Hz

(—6dB/oct)

Loudness

Contour

(Volume

control

set

at

-40dB

POSITION)

06

pears

Gal

Se

Sle

Kg

Bob

wens

+6dB

(100Hz)

Hum

and

Noise

(IHF,

short-circuited,

A

network)

PHONO)

3.

csv

beso

ee

a

oe

3

ee

a

76dB

TUNER,

AUX,

TAPE

PLAY...............

98dB

Miscellaneous

Power

Requirements

...............65

120V,

60Hz

Power

Consumption

.........

75W

(UL),

180W

(CSA)

Dimensions

..........

451(W)

x

151(H)

x

271(D)mm

17-3/4(W)

x

5-15/16(H)

x

10-11/16(D)

irr

Weight

(without

package)........---

7.3kg

(16lb

20z)

Furnished

parts

Operating

instructions...

2...

0.0...

eee

ee

eee

]

*

Measured

pursuant

to

Federal

Trade

Commission’s

Trade

Regulation

rule

on

Power

Output.

Claims

for

Amplifiers.

NOTE:

Specifications

and

the

design

subject

to

possible

modifi-

cation

without

notice

due

to

improvements.

2.FRONT

PANEL

FACILITIES

@®

POWER

SWITCH

Set

this

switch

to

ON

to

supply

power

to

the

amplifier.

@

SPEAKER

SELECTOR

Use

this

selector

to

select

the

speaker

systems.

OFF:

Sound

not

obtained

from

speakers.

A:

Sound

obtained

from

speakers

connected

to

the

A

speaker

terminals.

B:

Sound

obtained

from

speakers

connected

to

the

B

speaker

terminals.

A+B:

Sound

obtained

from

speakers

connected

to

both

A

and

B

speaker

terminals.

@

POWER

METER

This

meter

allows

you

to

read

out

the

rated

power

level

on

the

fluorescent

display

tube

when

speakers

with

a

nominal

impedance

of

8

ohms

are

connected

to

the

amplifier’s

speaker

terminals.

@

FUNCTION

INDICATORS

The

TUNER,

PHONO,

AUX

function

indicators

light

up

in

accordance

with

the

position

of

the

function

selector.

NOTE:

The

function

indicator

will

not

go

off

even

when

the

tape

monitor

switch

1

or

2

is

set

to

ON.

@

LOUDNESS

SWITCH

When

listening

to

a

performance

with

the

volume

control

turned

down,

set

this

switch

to

ON

and

the

bass

will

be

accentuated.

When

the

volume

is

low,

the

human

ear

finds

it

harder

to

hear

the

bass

than

when

the

volume

is

high.

The

loudness

switch

is

thus

designed

to

compensate

for

this

deficiency.

By

setting

it

to

ON,

the

bass

comes

through

much

more

strongly

and

the

sound

takes

on

a

punch

even

when

the

volume

control

is

turned

down.

:

ae

©

VOLUME

CONTROL

Use

this

control

to

adjust

the

output

level

to

the

speakers

and

headphones.

Turn

it

clockwise

to

increase

the

output

level.

No

sound

will

be

heard

if

you

set

it

to

“0”.

@

HEADPHONE

JACK

Plug

the

headphones

into

this

jack

when

you

want

to

listen

through

your

stereo

headphones.

NOTE:

Set

the

speaker

selector

to

OFF

when

listening

only

with

headphones.

(8)

BASS

AND

TREBLE

CONTROLS

Use

these

controls

to

adjust

the

bass

and

the

treble.

If

you

turn

the

bass

control

to

the

right

from

its

center

position,

you

will

be

able

to

emphasize

the

sound

in

the

low-frequency

range.

Conversely,

turning

this

control

left

from

the

center

position,

you

will

attenuate

the

sound.

You

can

use

the

treble

control

to

adjust

the

sound

in

the

high-frequency

range.

@

BALANCE

CONTROL

Use

this

control

to

balance

the

volume

of

the

left

and

right

channels.

If

the

sound

appears

to

be

louder

on

the

right,

it

means

that

the

volume

of

the

right

channel

is

higher.

Turn

the

balance

contro!

to

the

left

and

adjust.

Conversely,

if

the

sound

appears

to

be

louder

on

the

left,

it

means

that

the

volume

of

the

left

channel

is

higher.

Therefore,

turn

the

balance

control

to

the

right

and

adjust.

SUBSONIC

FILTER

SWITCH

When

this

switch

is

set

to

the

15Hz

position,

the

subsonic

filter

with

a

cut-off

frequency

of

15Hz

is

actuated.

The

subsonic

filter

serves

to

attenuate

frequencies

lower

than

15Hz

in

a

6dB/oct

slope.

It

is

therefore

effective

in

suppressing

ultra-low-

frequency

noise

which

is

generated

by

record

warp

and

other

causes.

You

cannot

actually

hear

this

noise

but

it

is

a

factor

in

the

generation

of

intermodulation

distortion

and

it

may

damage

your

speaker

system.

Set

this

switch

to

the

15Hz

position

during

record

play

for

the

best

effect.

SA-5800

d)

FUNCTION

SELECTOR

Use

this

selector

to

select

the

program

source.

When

set,

the

function

indicator

above

the

meter

panel

corresponding

to

the

position

of

the

func-

tion

selector

will

light

up.

TUNER:

Set

here

when

listening

to

broadcasts

on

a

tuner

connected

to

the

TUNER

jacks.

(The

TUNER

function

indicator

lights

up.)

PHONO:

Set

here

when

playing

records

on

a

turntable

connected

to

the

PHONO

jacks.

(The

PHONO

function

indicator

lights

up.)

AUX:

Set

here

when

listening

to

a

program

source

which

is

connected

to

the

AUX

jacks.

(The

AUX

function

indicator

lights

up.)

42

TAPE

MONITOR

SWITCHES

(1,

2)

Use

these

switches

to

monitor

recording

or

a

tape

being

played

back

on

a

tape

deck.

1:

Set

this

switch

to

ON

when

you

want

to

monitor

a

recording

or

a

tape

being

played

back

on

a

tape

deck

which

is

connected

to

the

TAPE

1

jacks.

2:

Set

this

switch

to

ON

when

you

want

to

monitor

a

recording

or

a

tape

being

played

back

on

a

tape

deck

which

is

connected

to

the

TAPE

2

jacks.

NOTE:

Set

these

switches

to

the

upper

(OFF)

position

when

playing

records

or

listening

to

broadcasts.

3.

BLOCK

DIAGRAM

fy

ae

PHONO

AUX

TUNER

REC

PLAY

REC

PLAY

TAPE

i

TAPE

2

REC

PLAY

REC

PLAY

R

CHANNEL

RECTIFIER

}

TO

FLHEATER

4.

CIRCUIT

DESCRIPTIONS

Equalizer

Amplifier

The

equalizer

amplifier

is

collector-to-emitter

feed

back

type

2-stage

direct-coupled

amplifier,

designed

with

a

gain

of

35.5dB

(at

1kHz),

a

over-

load

level

of

140mV

(at

1kHz,

THD

0.1%),

and

equalizer

deviation

of

+0.5dB

(30Hz-15kHz).

Power

Amplifier

This

all-stage

direct-coupled

pure

complemen-

tary

SEPP

circuit

features

a

current

mirror

load

differential

amplifier

in

the

first

stage,

and

in-

corporates

the

tone

control

circuits

in

the

NFB

loop.

Although

the

incorporation

of

the

tone

control

circuits

in

the

power

amplifier

stage

reduces

the

number

of

elements

that

the

signal

has

to

pass

through,

and

thereby

further

reduces

noise,

distor-

tion,

and

cost,

the

power

stage

does

require

a

higher

gain

and

a

higher

degree

of

stability.

In

the

SA-5800,

this

high

gain

and

high

stability

are

achieved

by

a

current

mirror

load

differential

amplifier

in

the

first

stage

and

by

the

use

of

a

bootstrap

circuit

for

the

load

of

the

pre-driver

stage.

The

power

stage

is

a

Darlington

connection

pure

complementary

SEPP

circuit,

resulting

in

an

output

power

rating

of

25W+25W

(82,

20Hz-

20kHz,

THD

0.03%).

ln

39.548

VOLUME

|

at

IkHz

(

SAME

AS

VOLTAGE

REGULATOR

CONTROL

SUBSONIC

FUNCTION

©

SPEAKER

lL

CHANNEL)

ore

.

©

SPEAKER

B

}

TO

POWER

STAGE

TO

EQ

AMP,

POWER

AMP,

INDICATOR

DRIVE

CIRCUIT

The

tone

controls

(BASS,

TREBLE)

are

operat-

ed

by

changing

the

frequency

response

of

the

power

amplifier

NFB

circuit.

Power

Supply Muting

This

circuit

is

designed

to

eliminate

the

un-

wanted

click

noise

generated

when

the

power

switch

is

turned

on

and

off.

With

reference

to

Fig.

4-1,

when

the

power

switch

is

turned

on,

Q;

will

remain

off

because

of

-B,,

and

then

Q,

emitter

will

become

—0.6V

through

the

minus

voltage

supply

route

(D,,

D3,

and

R,,.).

The

Q,

base

voltage

will

increase,

the

rate

of

increase

being

determined

by

the

R2,

R;,

TO

EQ

AMP,

FIRST

STAGE

OF

POWER

AMP.

POWER

ac

-

LINE

|

:

TO

POWER

STAGE

Fig.

4-1

Power

supply

and

muting

circuit

and

C;

time

constant.

Consequently,

Q,

emitter

voltage

will

rise

by

increase

of

the

base

voltage.

Therefore,

the

muting

action

when

the

power

switch

is

turned

on

is

achieved

by

delaying

the

supply

of

the

+B,

to

the

equalizer

amplifier

and

the

first

stage

of

the

power

amplifier.

When

the

power

switch

is

turned

off,

the

—B,

is

discharged

through

the

route

R,;—>

C,,

and

since

the

residual

voltage

of

C,

is

then

applied

to

the

base

of

Q,

through

R,

and

R;,

Q;

is

immediately

turned

on.

Therefore,

the

base

voltage

of

the

Q,

drops

to

OV,

and

the

+B,

supply

to

the

equalizer

amplifier

and

the

first

stage

of

the

power

amplifier

are

interrupted.

Indicator

Circuit

The

SA-5800

output

power

and

function

indi-

cators

feature

fluorescent

indicator

tube

(FL

tube).

In

this

tube,

thermionic

emissions

from

the

cathode

are

accelerated

into

the

fluorescent

substance

of

the

segmental

anodes,

resulting

in

the

emission

of

light.

This

tube

is

used

to

indicate

numerals,

letters,

and

other

symbols.

IC

(TA73IGP)

172

SIGNAL

INO

FLUORESCENT

FILAMENT

SA-5800

An

outline

of

the

FL

tube

drive

circuit

is

shown

in

Fig.

4-2.

The

output

circuit

signal

is

applied

to

pin

no.

6

(4)

of

the

IC

(TA7318P-A).

The

IC

contains

a

detector

circuit,

compressor

(40dB),

and

peak

hold

circuit

for

both

left

and

right

chan-

nels.

The

dynamic

range

of

the

signal

is

thus

contracted

by

40dB

to

obtain

a

‘‘peak

held”

DC

voltage.

The

output

power

indicator

segments

of

the

FL

tube

are

driven

by

the

HA12010

ICs

(one

for

each

channel)

equipped

with

12

pairs

of

differen-

tial

amplifiers.

These

amplifiers

are

biased

at

in-

creasing

levels,

so

each

amplifier

will

commence

to

operate

separately

as

the

input

level

increases.

And

since

these

amplifiers

apply

the

voltages

to

the

output

power

indicator

segments,

each

suc-

cessive

segment

will

light

up

in

turn

as

the

input

level

rises.

The

function

indicators

are

lit

up

as

a

result

of

a

voltage

being

applied

to

the

corresponding

func-

tion

indicator

segment

according

to

the

selected

positions

of

the

FUNCTION

switch.

INDICATOR

TUBE

Fig.

4-2

Indicator

circuit

5.

DISASSEMBLY

Side

Covers

and

Top

Cover

1.

Remove

the

four

screws

(A),

and

remove

the

left

and

right-hand

side

covers.

2.

Remove

the

two

screws

(B),

and

remove

the

top

cover.

Bottom

Plate

Remove

the

four

screws

(C).

Front

Panel

Pull

off

all

the

knobs,

and

remove

the

four

nuts

(D).

Side

cover

Front

panel

Side

cover

SA-5800

6.

ADJUSTMENTS

Idie

Current

Adjustment

1.

Tum

the

VOLUME

control

down

to

minimum

level,

turn

the

power

on,

and

wait

about

10

minutes.

2.

Connect

a

DC

voltmeter

to

the

TP

terminals

(L

ch;

TP,

@®

and

TP,

©,

R

ch;

TP;

®

and

TP,

©)

of

the

GWK-128.

3.

Check

that

the

voltage

between

TP,

and

TP,

(L

ch)

lies

within

the

DC

4.4mV-35mV

range.

Then

make

a

similar

check

for

the

R

ch

(be-

tween

TP;

and

TP,

).

If

the

voltage

is

less

than

4.4mV,

cut

jumper

A

(L

ch),

and

jumper

B

(R

ch).

If

the

voltage

exceeds

35mV,

check

for

circuit

failure.

Jumper

A

Jumper

B

Fig.

6-1

Output

Indicator

Adjustment

1.

Set

the

tone

control

to

the

flat

position.

2.

Set

the

SPEAKERS

selector

to

the

A

position,

and

connect

an

82

resistor

and

AC

voltmeter

to

the

speaker

output

terminals.

@—

vr,

3.

Set

the

FUNCTION

switch

to

the

AUX

posi-

©—vr,

tion,

and

apply

a

1kHz,

150mV

signal

to

the

AUX

input

terminals.

4.

Adjust

the

VOLUME

control

so

that

the

volt-

© ©

age

on

the

output

terminals

(SPEAKERS)

reads

9V

(AC).

5.

Adjust

VR,

(Lch)

and

VR,

(R

ch)

of

the

indi-

Cator

assembly

so

that

the

output

power

indi-

Fig.

6-2

cator

reads

10

watts.

Indicator

assembly

Panel

stay

e

The

A\

mark

found

on

some

component

parts

indicates

7.

PARTS

LOCATION

the

importance

of

the

safety

factor

of

the

part.

There-

fore,

when

replacing,

be

sure

to

use

parts

of

identical

Front

Panel

View

designation.

Front

panel

assembly

Lever

knob

ANB-736

AAD-183

Knob

Knob

AAB-204

AAB-202

Lever

knob

AAD-183

Lever

knob

AAD-183

Knob

Knob

AAB-203

AAB-204

Lever

knob

AAD-183

Front

View

with

Panel

Removed

Fluorescent

indicator

tube

Lever

switch

(LOUDNESS)

AAV-004

ASK-155

Variable

resistor

Rotary

switch

(SPEAKERS)

(VOLUME)

2

Lever

switch

Lever

switch

(TAPE

MONITOR

1,

2)

(POWER)

ASK-156

ASK-514

8

Slide

rotary

switch

(FUNCTION)

Pa

(PHONES)

ASE-110

;

Variable

resistor

(BASS)

re

a

{SUBSONIC)

ACT-117

:

Variable

resistor

(TREBLE

Variable

resistor

(BALANCE)

ACT-117

ACT-118

10