Pioneer Gm-202 User manual

Y

PIONEER’

The

Art

of

Entertainment

@

GM-202/xX1H/UC

BRIDGEABLE

POWER

AMPLIFIER

GM-20

ORDER

NO.

CRT1643

xXIN/UC

GM-202

XIFV/EW,ES

GM-102

xIH/UC

CONTENTS

1.

SAFETY

INFORMATION(UC

MODEL)

«..-s.sccceucteees

2

2.

DISASSEMBLY

....csscscsuscsnseesctnetetenenscsctienseee

2

3.

ELECTRICAL

PARTS

LIST

cru

sssesssesstsstcesseiesenetet

3

4.

CONNECTION

DIAGRAM

(GM-202/X1H/UC,EW,ES)....5

5.

SCHEMATIC

CIRCUIT

DIAGRAM

(GM-202/X1H/UC,EW,ES)....7

6.

CONNECTION

DIAGRAM(GM-102/X

1H/UC)........

9

SPECIFICATIONS

Power

Source

...........

14.4V

DC

(10.8

—

15.6

V

allowable)

Grounding

System

oo...

eee

eeeceeeeeeeeee

Negative

type

Current

consumption

12.5

A

(at

continuous

power,

49)

Average

current

drawn.........

3.5A

(4Q

for

two

channels)

6A

(4Q

for

one

channel)

BUS

Oca

ce

stecidsetdislctescesiediecdteescsaty

ent

baaa

teenies

By

avi

case

15A

DIMENSIONS

«0...

eee

206(W)

*

50(H)

=

175(D)mm

{8-

1/8{W)

*

2(H}

x

6-7/8(D}in.}

WI

GRE

ecsscevsectscsesciacth

cxcetecniiedtsdedaverrain

wnhccspeeenies

1.9

kg

{2.2

Ibs.)

(Leads

for

wiring

not

included)

Maximum

power

output............

TOW

X

2/160W

*

1

(EIAS)

PIONEER

ELECTRONIC

CORPORAT

jleguro

1+

7,

SCHEMATIC

CIRCUIT

DIAGRAM

(GM-102/X1H/UC)........

11

8.

EXPLODED

VIEW...

9.

PACKING

METHOD

10.

OPERATIONS

AND

CONNECTION

(GM-202/X

TH/UC)........

7

11.

OPERATIONS

AND

CONNECTION

(GM-102/X1H/UC)........

19

Continuous

power

output

sevens

35W

x

2(at

14.4V,

49,

20

—

20,000

Hz,

0.08%

THD)

BOW

x

Tat

14.4V,

2,

20

—

20,000

Hz,

0.8%

THD)

SOW

x

2{at

14.4V,

20,

20

—

20,000

Hz,

0.8%

THD)

25W

X

2{at 12V,

4Q,

20

—

20,000

Hz,

0.08%

THD)

55W

*

tat

12V,

4Q,

20

—

20,000

Hz,

0.8%

THD)

35W

*

2fat

12V,

2Q,

20

—

20,000

Hz,

0.8%

THD)

Load

impedance...

eecceeeeeee

4Q

(2

—

8

allowable)

-.10

—-

50,000

Hz

(+0dB,

-1dB)

105

dB

(INF

—

A

network)

60

dB(1kHz)

RCA:

0.4

—~

2V/22kQ

Frequency

response...

Signal-to-noise

ratio

..

Separation

input

level/impedance

..

Input

level/impedance

(GM-X102)

decervidesnd

saves

sovtsedes

Speaker:

1.6

—

8

V/40kQ

ome,

Meguro-ku,

Tokyo

153,

Japan

PIONEER

ELECTRONICS

SERVICE

INC.

P.O.Box

1760,

Long

Beach,

California

90801

U.S.A.

PIONEER

ELECTRONICS

OF

CANADA,

INC.

300

Allstate

Parkway

Markham,

Ontario

L8R

OP2

Canada

PIONEER

ELECTRONIC

[EUROPE]

N.V.

Haven

1087

Keetberglaan

1,

9120

Melsele,

Beigium

PIONEER

ELECTRONICS

AUSTRALIA

PTY.LTD.

178-184

Boundary

Road,

Braeside,

Victoria

3195,

Australia

TEL:103}580-9911

©

PIONEER

ELECTRONIC

CORPORATION

1995

K-FFP.

JAN.

1995

Printed

in

Japan

GM-202,102

1.

SAFETY

INFORMATION(UC

MODEL)

CAUTION

This

service

manual

is

intended

for

qualified

service

technicians;

it

is

not

meant

for

the

casual

do-it-yourselfer.

Qualified

technicians

have

the

necessary

test

equipment

and

tools,

and

have been

trained

to

properly

and

safely

repair

complex

products

such

as

those

covered

by

this

manual.

Improperly

performed

repairs

can

adversely

affect

the

safety

and

reliability

of

the

product

and

may

void

the

warranty.

If

you

are

not

qualified

to

perform

the

repair

of

this

product

properly

and

safely;

you

should

not

risk

trying

to

do

sa

and

refer

the

repair

to

a

qualified

service

technician.

WARNING

Lead

in

solder

used

in

this

product

is

listed

by

the

California

Health

and

Welfare

agency

as

a

known

reproductive

toxicant

which

may

cause

birth

defects

or

other

reproductive

harm

(California

Health

&

Safety

Code,

Section

25249.5).

When

servicing

or

handling

circuit

boards

and

other

components

which

contain

lead

in

solder,

avoid

unprotected

skin

contact

with

the

solder.

Also,

when

soldering

do

not

inhale

any

smoke

or

fumes

produced.

2.

DISASSEMBLY

@

Removing

the

Case

and

Panel

1.Remove

four

screws,

and

then

remove

two

cases

2.Remove

two

screws,

and

then

remove

panel.

@

Removing

the

Amp

Unit

1,Remove

eight

screws.

2.Amp

unit

is

unremovable

from

heat

sink

if

pulled

up

ordinarily,

because

silicone

compound

has

been

applied

between

heat

sink

and

subheat

sink.

To

remove

amp

unit,

therefore,

follow

steps

below.

a.

Unfasten

two

arbitrary

screws

securing

power

transistor.

b.

Screw

them

little

by

little

alternately

into

screw

holes

A

to

get

amp

unit

afloat

and

remove

it.

3.Once

amp

unit

has

been

removed,

screws

with

which

Power

transistor

has

been

secured

should

be

returned

to

thier

original

position.

:

qi

Subheat

Sink

Heat

Sink

Fig.2

iy)

GM-202

,102

10.

OPERATIONS

AND

CONNECTION(GM-202/X1H/UC)

iat

xe

[6]

&

7}

(uit

HT

1104

-

1gf

E

(38)

-

Fig.

10

Fig.

11

Setting

of

This

nit

(Fig.

9)

[1]

Power

Indicator

The

power

indicator

lights

when

the

power

is

switched

on.

5

[2]

input

Level

Adjustment

E

if

the

sound

is

too

low,

even

when

the

volume

of

the

car

stereo

used

along

with

this

power

amplifier

is

turned

up,

turn

input

level

control

on

the

back

of

the

power

amplifier

clock-

wise.

If

the

sound

distorts

when

the

volume

is

turned

up,

turn

the

input

level

contro!

counterclockwise

+

Set the

input

fevel

contro!

to

500

mV

when

this

amplifier

is

connected

to

a

Pioneer

car

stereo

with

RCA

output

jacks.

ff

the

sound

is

too

low

or

distorts,

adjust

the

input

level

control,

[3]

BFC

(Beat

Frequency

Control)

Switch

It

you

hear

a

beat

while

listening

to

an

AM

broadcast

with

your

car

stereo,

change

the

BFC

switch

using

a

small

screw-

driver.

17

GM-202,102

Connecting

The

Unit

&

CAUTION

Remove

the

negative

(-)

terminal

of

the

battery

to

avoid

the

risk

of

short-circuit

and

damage

to

the

unit.

Secure

the

wiring

with

cable

clamps

or

adhesive

tape,

To

protect

the

wiring,

wrap

adhesive

tape

around

them

where

they

lie

against

metal

parts.

ff

you

drill

a

hole

in

the

engine

compart-

ment

to

directly

connect

the

special

red

battery

lead

to

the

car

battery,

plug

the

hole

with

a

rubber

bushing

to

protect

the

wire.

f

a

rubber

bushing

is

not

used,

the

insulation

may

be

damaged

and

a

short

circuit

may

result

due

to

the

vibrations

of

the

car.

Do

not

route

wires

where

they

will

get

hot,

for

example

where

the

heater

will

blow

over

them.

If

the

insulation

heats

up,

it

may

become

damaged,

resulting

in

4

short-circuit

through

the

vehicle

body.

Make

sure

that

wires

will

not

interfere

with

moving

parts

of

the

vehicle,

such

as

the

gearshift,

handbrake

or

seat

stiding

mechanism.

Do

not

shorten

any

leads.

Otherwise

the

protection

circuit

may

fail

ta

work

when

it

should.

Never

feed

power

to

other

equipment

by

cutting

the

insulation

of

the

power

supply

wire

to

tap

from

the

wire.

The

current

capacity

of

the

wire

will

be

exceeded,

causing

overheating.

(Fig.

11)

(6]

(7)

{8}

{9}

Special

red

battery

wire

Connect

to

unswitched

source

greater

than

15

A.

Ground

wire

(black)

Connect

ta

metal

body

or

chassis

Fuse

(15

A)

Car

stereo

with

RCA

output

jacks

{10}

Externat

output

(11]

White

(12)

Red

(13]

Connecting

wires

with

RCA

plugs.

{sold

separately)

{14]

RCA

input

jack

{15}

Blue

Connect

the

rnaie

terminal

of

this

wire

fo

the

blue

wire

of

the

car

stereo

{system

control

terminal}.

The

female

terminal

can

be

connected

te

the

auto:

antenna

relay

control

terminal

if

the

car

stereo

does

not

have

a

system

remote

control

terminal,

connect

the

male

terminal

to

the

power

terminal

through

the

ignition

switch.

[16]

Speaker

output

terminal

See

the

“Connecting

the

Speakers”

section

for

speaker

connection

instructions

+

Be

sure

to

use

the

special

red

battery

wire

suppiied

with

the

amplifier

and

connect

unswitched

source

greater

than

15

A.

Use

the

supplied

black

ground

wire

and

connect

to

the

vehicle

body.

{The

sup-

plied

special

red

battery

and

ground

wires

are

designed

so

that

the

amplifier

can

be

connected

safely.}

OQ

To

prevent

damage

+

Do

not

ground

the

speaker

wire

directly

or

connect

a

negative

{-)

wire

for

several

speakers.

Speakers

to

be

connected

to

the

amplifier

should

conform

with

the

standards

listed

below.

Otherwise

damage

will

be

caused

to

the

speaker.

The

speaker

impedance

must

be

2

to

8

ohms.

Speaker

.

me

+

Power

_Channvel

|

Type

Nominal

input:

Sub-woofer

|

Min

sey

Two-channel

pt

|

Other

than

|

Max.

input

sub-woofer

|

Min.

70W

Nominal

input

Sub-woofer

|

Min.

80

Ww

One-channel

ANG

CEAEaE

Other

than

|

Max.

input

i

sub-woofer

|

Min.

160

W_

Connecting

the

Power

Terminal

Be

sure

to

use

the

special

red

battery

wire

supplied

with

the

amplifier

and

connect

unswitched

source

greater

than

15

A.

Use

the

supplied

black

ground

wire

and

connect

to

the

vehicle

body.

(The

sup:

plied

special

red

battery

and

ground

wires

are

designed

so

that

the

amplifier

can

be

connected

safely.)

Connect

the

special

red

battery

wire

to

the

POWER

terminal

(+),

and

the

black

ground

wire

to

the

GND

terminal

(~).

POWER

terminal

Terminal

screw

Terminal

screw

ae

x

GND.

terminal

fee)

‘|

Ground

wire

\

(black?

Special

red

battery

wire

Fig.

12

Fig.

13

Securely

fasten

the

special

red

battery

wire

and

the

ground

wires

with

terminal

screws.

+

This

unit

is

for

vehicles

with

a

12-volt

battery

and

negative

grounding.

Before

installing

it

in

a

recreational

vehicle,

truck,

or

bus,

check

the

battery

voitage.

install

and

route

the

special

red

battery

wire

supplied

with

the

amplifier

as

faraway

as

possible

from

the

speaker

wires.

Install

and

route

the

battery

wire,

ground

wire,

speaker

wires,

and

the

amplifier

as

faraway

as

possible

from

the

antenna,

antenna

cable

and

tuner.

Connecting

the

Speakers

The

speaker

output

mode

can

be

two

channel

(stereo),

one-channel

(mono),

or

three-channel

(stereo

+

mono).

To

connect

the

speaker

wires

to

suit

the

mode.

Connect

the

speakers

according

to

the

figure

below.

Two-channel

mode

(stereo)

Green

cover

Spesk

Green

stripe

peaker

(left)

Speaker

right)

prea

One-channal

mode

{mano}

Black

cover

Fig.

14

>

Grean

cover

No

CONNectign

—

Green

stripe

peaker

ronal

Biack

stripe

Black

cover

Fig.

15

Three-channel

mode

{stereo

+

mono}

The

power

amplifier

ig

basically

a

two-

channel/one-channet

bridgeabie

amplifier,

but

three

channels

can

be

achieved

by

combining

the

stereo

and

mono

modes

using

inductors

and

capacitors.

See

Figs.

16

and

17

for

details

of

wiring.

+

The

foliowing

Figs.

16

and

17

require

advanced

understanding

of

electronics.

#

you

do

not

understand

the

diagram,

please

have

the

work

done

by

your

nearest

authorized

Pioneer

installation

specialist.

Three-channel

mode,

two-way

system

Green

cover

Mid-high.

Green

stripe

fid-hig

eft)

Woofer

{mono}

Mid-high

(right)

Biack

cover

Fig.

16

Three-channel

mode.

three-way

system

High

Ps

md.

von)

D

tet

Nadi

mid

owes)

SY

det

Wooler!

sub

woofer

imono}

Migs

Pe

Laghsdeat

Green

cover

mid-bass:

(right

Highy

rae

mid-high

fright)

Fig.

17

»

The

inductor

(L7

or

L2

in

the

diagram)

acts

as

a

low-pass

filter.

The

capacitor

(C1

or

C2

in

the

diagram)

acts

as

a

high-pass

filter.

The

inductor

(L)

shail

be

used

on

the

woofer/sub-woofer,

and

capacitor

(C)

shall

be

used

on

the

high/mid-high

Remember

when

bridging

an

amplifier

it

will

see

only

half

of

the

original

speaker

impedance.

Therefore,

you

must

use

speakers

that

have

ratings

of

4

ohms

or

higher.

If

you

use

speakers

that

have

lower

impedance

ratings

it

may

cause

damage

fo

the

amplifier.

When

the

inductors

and

capacitors

are

connected

to

the

speaker

wires,

secure

or

solder

them

so

they

cannot

be

pulled

loose.

Tape

or

use

heat

shrink

on

the

joints

to

prevent

short

circuits.

a

y

=.

Black

stripe.

ao

Black

cover

GM-202

,102

Setting

the

Filter

Constant

Low

pass

filter

(for

sub-woofer/

woofer

6

dB/octave

(Fig

18)

Fig.

18

High-pass

fitter

(for

mid/mid-high}:

6

dB/octave

(Fig.

19)

OaB

ap

-

6dB

cr

P——ib,

o~

aed

|

eG

2

Fig.

19

Band-pass

fitter

(combination

of

low-pass

fitter

and

high-pass

filter

for

mid-bass/mid):

6

dB/octave

(Fig.

20)

L2

C2

ib

|

11.

OPERATIONS

AND

CONNECTION(GM-102/X1H/UC)

iy

12}

{6}

(5)

{17}

Fig.

21

{2}

{16}

Fig.

22

Pioneer GM-202 User manual

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