Pioneer Bp-780 User manual

Service

anual

GRAPHIC

EQUALIZER/AMPLIFIER

p-7

SPECIFICATIONS

Power

source

..........

14.4V

DC

(10.8—15.6V

allowable)

Grounding

system

..........

006

e

ee

eee

ees

Negative

type

Max.

current

consumption

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

eee

ees

8A

Dimensions

.............+55:

150(W)

X

50(H)

X

150(D)mm

[5-3/8(W)

X

2(H)

X

5-3/8

(D)in.]

Weidhtcic¢sensetecie

erat

ete

ceded

ae

1.3kg

(2.9lbs.)

Continuous

power

output

is

12W

per

channel

min.

into

4

ohms,

both

channels

driven

50

to

20,000Hz

with

no

more

than

5%

THD.

Maximum

power

output

..........

0-0.

eee

20W

X

4

Load

impedance

.............---+-

49

(4—80

allowable)

Frequency

response

...............-.

20—50,000Hz

(+

3dB)

Signal-to-noise

ratio

.........

90dB

(IHF-A

network,

at

1W)

DistOnion:.

osc:

eccecy

et

tan

wet

ees

0.5%

(at

1.5W,

1kHz)

WY)

PIONEER

W19

ORDER

NO.

CRT

-481-0

US,

CA,

ES,

EW

Input

leVel!

ssc.

oereee

eee

wae

Me

COMPO:

7OnV/20k0

LINE

IN:

200m

V/15k.

BOOSTER:

3V/1200

Equalization

frequency

.......

6OHz,

125Hz,

250H:,

500Hz,

1kHz,

3.5kHz,

10kHz

Gall.

6.5.4

eee

con

ees

en

a

ae

Oe

ea

eae

een

a

OdB

Equalization

range

..........

0.6

e

eee

7%,

212dB

These

specifications

were

determined

and

are

presented

in

accordance

with

specification

standards

established

by

the

Ad

Hoc

Committee

of

Car

Stereo

Manufacturers.

Note:

Specifications

and

the

design

are

subject

to

possible

modifi-

cation

without

notice

due

to

improvements.

a

SS

eee

es

re

ng

PIONEER

ELECTRONIC

CORPORATION

4-1,

Meguro

1-Chome,

Meguro-ku,

Tokyo

153,

Japan

PIONEER

ELECTRONICS

[USA]

INC.

P.O.

Box

1760,

Long

Beach,

California

90801

U.S.A.

TEL:

(BOO)

421-1404,

(BOO)

237-0424

PIONEER

ELECTRONIC

[EUROPE]

N.V.

Keetbergiaan

1,2740

Beveren,

Belgium

TEL:

03/775:28:08

PIONEER

ELECTRONICS

AUSTRALIA

PTY.

LTD.

178-184

Boundary

Road,

Braeside,

Victoria

3195,

Australia

TEL:

(O03)

580-9911

ET

©

DEC.

1984

Printe#

in

Japan

CONTENTS

NAME

OF

PARTS

and

THE

IR

FUNCTION

oe

SS

SCHEMATIC

CIRCUIT

DIAGRAM

(BP-700/US,

CA;

ES)

oie

aiciiteitietecs:

1.PARTS

LOCATION

NOTE:

@

Heat

Sink

CNR-256

Power

P.C.

Board

Button

(DEFEAT)

ed

*

CAE-064

PARTS

LOCATION

.................cceceeee

enone

CONNECTION

po.

chowciiety

ness

eycan

ta

conceaes

CIRCUIT

DESCRIPTION

.........

eee.

DISASSEMBLY

csrincocdstespreteehoctae

cds:

phate

ices

1

7.

CONNECTION

DIAGRAM

(BP-780/US,

CA,

ES)

......

14

peleeuenetarse

2

8.

SCHEMATIC

CIRCUIT

DIAGRAM

(BP-780/EW)

......

17

Saati

4

9.

CONNECTION

DIAGRAM

(BP-780/EW)

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

20

BAe

ned

hee

5

10.

EXPLODED

VIEW.

|

side

cdectssacaecauigtusedndeauciatuncehedeys

23

ee

ooeas

es

7

11,

ELECTRICAL

PARTS

LIST...

ec

cseeeeere

eee

20

12.

PACKING

MEHOD

'a

ci

ioe

Sp

essen

eed

seseodececiesareasnaes

29

iieghobeusaes

11

For

your

Parts

Stock

Control,

the

fast

moving

items

are

indicated

with

the

marks

x

ands.

|

*

*:

GENERALLY

MOVES

FASTER

THAN

x.

This

classification

shall

be

adjusted

by

each

distributor

because

it

depends

on

model

number,

temperature,

humidity,

etc.

:

aM...

Cord

(BP-780/US,

CA,

ES)

CDK-247

Heat

Sink

CNR-257

Grille

Assy

CXD-702

QUESTIONNAIRE

MODEL

One

Model

per

questionnaire

Dear

Servicer,

Thank

you

for

your

cooperation

in

the

post-sale

service

of

Pioneer

products.

This

questionnaire

is

used

as

a

tool

to

improve

the

serviceability

of

our

products

and

service

manuals.

Please

evaluate

this

model

and

service

manual

by

answering

the

following

questions.

Your

ideas

may

be

realized

in

our

future

products.

Your

answers

will

be

appreciated.

Thank

you.

PIONEER

ELECTRONIC

CORP.

T.

Nakagawa,

Manager,

Service

Section,

International

Division

SERVICING

EVALUATION

Circle

applicable

number:

Disassembly

/Re-assembly:

.

Circuit

Checks:

Replacement

of

Parts:

d.

Adjustment

(s):

1

2

3

£4*4

¥*§

*

If

(4)

or

(5)

was

circled,

please

be

specific.

e.

Your

advice,

opinion

or

ideas

servicing

this

product.

2.

SERVICE

MANUAL

EVALUATION

a.

Circuit

&

Mechanism

Description

b.

Circuit

Diagram

ae

_

3.

OTHER

|

Please

describe

other

areas

of

servicing

which

you

may

find

difficult.

Completed

by

:

Company

Name

:

Address

:

City/State/Zip

:

Please

send

this

form

filled

to

the

distributor

in

your

country.

Oe

YOU

COUNETY

s.

_

BP-7s0

2.

NAME

OF

PARTS

and

THEIR

FUNCTION

@

Equalizer

Switch

(DEFEAT)

Press

to

activate

the

equalizer

control

function

and

iluminate

the

indicator

on

the

equalizer

control

lever.

©

Lch

Level

Indicator

®

Rch

Level

Indicator

Green,

orange

and

red

indicators

illuminate

corresponding

to

the

left/right

output

levels.

Fig.

2

@

Equalizer

Control

Slides

up

and

down

to

allow

adjustment

to

suit

both

the

music

and

individual

tastes.

Pressing

the

equalizer

switch

causes

each

indicator

to

illuminate.

@

Fader

Control

Raising

the

lever

gradually

decreases

the

volume

of

the

rear

speakers,

while

lowering

it

gradually

decreases

the

volume

of

the

front

speakers.

Adjust

the

volume

of

the

front

and

rear

speakers.

3.CONNECTION

Connect

the

components

correctly

as

shown

in

the

diagram.

@

To

ensure

that

all

components

used

in

combination

with

@

Test-connect

all

components

before

securing

them

into

this

unit

operate

properly,

be

sure

to

wire

the

main

power

place.

Test-operate

your

entire

car

stereo

system

to

supply

cable

(red)

correctly

to

the

respectively

determined

ensure

that

there

are

no

faulty

wiring

connections

be-

points.

Failure

to

do

so

or

errors

in

this

process

will

result

tween

this

unit

and

the

rest

of

your

car

stereo

system.

in

total

inoperation.

@

Be

sure

to

connect

only

a

single

component

as

shown

in

@

Be

sure

to

properly

connect

the

color

coded

leads.

Failure

the

connection

diagram.

If

two

or

more

components

are

to

do

so

can

cause

malfunctions.

connected,

internal

circuitry

may

be

damaged

or

an

acci-

dent

may

occur.

|

Input

Selector

|

@

When

using

this

unit

in

combination

with

a

car

stereo

Be

sure

to

set

the

input

selector

before

wiring.

(Fig.

3)

equipped

with

jacks,

see

the

section

entitled

‘‘When

combined

with

a

car

stereo

with

jacks”.

@

Speakers

connected

to

this

unit

must

be

high

power

type

with

over

20W

maximum

input

power

and

have

impe-

dance

between

4

and

8

ohms.

Be

aware

of

the

fact

that

using

a

speaker

other

than

the

one

specified

can

cause

the

speaker

to

be

damaged.

©

A

special

BPTL

circuit

is

used

to

be

sure

that

you

do

not

connect

the

speaker

directly

to

ground

nor

join

the

left

and

right

speaker

(—)

leads.

@

For

detailed

information

concerning

connections

between

different

components

and

this

unit

consult

their

respective

COMPO:

When

connecting

the

unit

with

a

component

car

instruction

manuals

and

follow

those

recommendations

:

stereo

|

precisely.

BOOSTER:

When

connecting

the

unit

with

a

reguiar

car

@

Be

sure

not

to

remove

the

cap

on

the

red

lead

(female

eteren

plug)

of

this

unit

when

not

in

use

to

prevent

shorting.

JACK:

When

connecting

the

unit

with

a

car

stereo

with

®

Wire

all

connecting

cords

so

that

they

stay

well

clear

of

jacks

high-temperature

areas

such

as

the

heater

exhaust

port.

Fig.

3

ae.

When

Combined

with

a

Component

Car

Stereo

Front

Speaker

Grech

Left

Be

sure

not

to

10

Och

remove

the

cap.

Green/black

Ea

ole

eee

|

Front

Speaker

Gra

Right

fens

|

Red

|

To

@ch

Y

|

es

ed

=

Green

—

J

oo

|

I

|

Black

|

Gray/black

|

Rear

Speaker

|

—_

To

Och

!

|

A

pee

ee

ire

8

|

i

Gray

|

ee

|

eg

aa

aes

ellen

[on

2

—

Green/black

*

Rear

Speaker

To

®ch

Gray

Do

not

connect

anything

to

this

terminal.

Gray/black

;

Fag.

4

Component

car

stereo

oad

Connect

to

the

plus

(+)

circuit

(clock

illmiry

ation,

cassette

deck

I

"

smail

lamp

circuits,

etc.)

of

the

car’s

lighting

wit

ch.

Red

.

i

oo

—}y

Connect

this

lead

to

the

power

terminal

which

is

passed

through

the

ignition

switch.

(DC

12V}

Black

>

(ground)

Black

Connect

to

metal

body

or

chassis.

wie

Connect

to

metal

body

or

chassis.

When

Combined

with

a

Regular

Car

Stereo

e@

Use

a

regular

power

car

stereo

with

a

Front

Speaker

maximum

output

of

6.5W+6.5W

or

To

@©ch

less.

Black

(ground)

Front

Speaker

To

®@ch

Connect

to

metal

body

or

chassis.

;

Regular

power

car

stereo

(Unequipped

with

jacks).

Rear

Speaker

To(@ch

Rear

Speaker

To

®ch

>

(Max.

3A

12V

DC)

Remove

the

cap

and

connect.

Front

Fig.

5

Gray/black

Yellow

ae

p

ae

Connect

to

the

plus

(+)

circuit

(clock

illumination,

Cie

C2

small

lamp

circuits,

etc.)

of

the

car’s

lighting

switch.

Red

Beas

oe

=_

Connect

this

lead

to

the

power

terminal

which

is

passed

through

the

ignition

switch.

(DC

12V)

Black

<C

Connect

to

metal

body

or

chassis.

When

Combined

with

a

Car

Stereo

with

Jacks

Front

Speaker

Black

;

oa

T

h

(ground)

oe

cm

O

Rear

Speaker

ight

To

®ch

Red

Connecting

cords

with

plugs

(sold

separately)

White

Red

Car

stereo

with

jacks.

Red

or

reacertiite

cyas0—

~

ed

Remove

the

cap

and

connect.

(Max.

3A

12V

DC)

Connect

to

metal

body

or

chassis.

Front

Speaker

To

®ch

Do

not

connect

anything

to

this

ae

SaaS

Se

eae

7

:

Green

|

Left

Aba

ti

|

wal

|

Vo

|

=

va

Fig.

6

Gray/black

Yellow

Connect

to

the

plus

(+)

circuit

(clock

illumination,

ceo

Cc

smail

lamp

circuits,

etc.)

of

the

car's

lighting

switch.

Red

Connect

this

lead

to

the

power

terminal

which

is

T

ty

:

[0

passed

through

the

ignition

switch.

(DC

12V)

Black

<@

Connect

to

metal

body

or

chassis.

4.CIRCUIT

DESCRITION

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wm

eH

KKK

5

s

=

;

Isolator

OP

780

US/CA/ES

Model

only

AMP

|

I

{

cee

Equalizer

Ic

302

Booster

IN

ee

"

=

S|

pe,

DIN

IN

88

O60

(dBs)

+

10

Booster

IN

33dBs

Oo

-9dBs

-10

:

-20

Pre

IN

ant

—21dBs

AMP

°

Audio

Signal

path

(Lch)

©

DP

780

1US/CAVES

Model

Only

Booster

IN

DIN

IN

ic

102

6)

(6)

———>

_

REAR

(2——>

_L

ch

explanation

Division

and

synthesis

A

signal

will

be

input

to

12

of

IC

30l

Symbols

and

a

signal

will

be

output

from

13

QIO!

Q102

QIO3

Qi04

Qi0s

Qi0G

1C303

Power

Amp

IC

101

ae

>

FRONT

S2

VRI08

Loh

Ic

102

Pe.

REAR

Lech

+iOdBs

Power

Amp

+44dB

Volume

loss

B

Fig.

8

Fig.

9

5.DISASSEMBLY

e

Removal

of

Case

1.

The

case

can

be

removed

by

removing

the

four

screws

labled

“A.”

Fig.

10

¢

Removal

of

Chassis

1.

The

Chassis

can

be

removed

by

removing

the

five

screws

labeled

“B”

and

the

two

rivets.

Fig.

11

e

Removal

of

Grille

Assembly

e

ICs

and

Transistors

1.

The

grille

assembly

can

be

removed

by

removing

the

three

|

screws

labeled

“C.”

a |

SE

A

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|

s.

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CA,

ES)

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Pioneer BP-780 User manual

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