Pioneer GM-2000A User manual

WM PIONEER.
BRIDGEASLE POWER AMPLIFIER:
SPM POWER SUPPLY
20H Rm ICH

Features
e The pulse width modulation (PWM) is used in the DC/DC convert-
er circuit to give a high-power output of 100 W + 100 W for stereo
and 200 W for mono with low distortion.
e The auto input selector makes it easy to connect the amplifier to a
car stereo with DIN sockets or one with RCA pin jacks.
e The bridgeable function allows switching between two channel
mode (stereo) and single-channel mode (mono) by simply operat-
ing the mode select switch.
e The low boost switch enhances low-frequency sounds.
e The low-pass filter (LPF) switch allows the amplifier to be used as
a power amplifier for sub-woofers.
e The use of oxygen-free copper (OFC) speaker leads and audio
capacitors assures high-quality sound.
e The large aluminum heatsink gives good radiation to help main-
tain stable power for extended periods.

Controls
and
their
Use
@ Gain Control
If the output is low even when the volume of the car stereo is turned
up, turn this control clockwise. If there is distortion when the volume
of the car stereo is turned up, turn this control counter-clockwise.
@ Low Boost Switch
Press this switch to increase the volume of sounds in the low-fre-
quency range if your car audio system does not reproduce enough
bass sounds. This is effective when the amplifier is used to drive a
sub-woofer.
e If there are no low-frequency sounds in the music you are listening to, or if
you are using relatively smail speakers, this switch may not make much
difference.
©
Low
Pass
Filter
(LPF)
Switch
If
this
switch
is
pressed
when
this
amplifier
is
to
be
used
to
drive
a
sub-woofer,
only
sounds
in
the
low-frequency
range
will
be
output.
@ Mode Select Switch
Press
this
switch
to
use
the
amplifier
as
a
mono
amplifier.
e
When
the
amplifier
is
used
in
this
way,
the
speaker
leads
need
to
be
con-
nected
accordingly.
(See
“Connecting
Speaker
Leads”
on
page
5.)
@ Load Impedance Select Switch
Press
this
switch
when
the
impedance
of
the
speaker
or
speakers
connected to this amplifier is less than 4 ohms.
© Power Indicator
The
power
indicator
lights
when
the
power
is
switched
on.
HSIIDNA

Connecting
the
Units
a
a
Connect the components correctly as shown in the diagram.
Test-connect all components before securing them into place.
Test-operate your entire car stereo system to ensure that there are
no faulty wiring connections between this unit and the rest of
your Car stereo system.
The input selector of this amplifier functions automatically.
Therefore, the amplifier may be used with either a Pioneer car
stereo with DIN sockets or a car stereo with RCA pin jacks. For
information about connecting a stereo, see the section entitled
"When combined with a car stereo with DIN sockets" or that
entitled "When combined with a car stereo with RCA pin jacks".
When two channels (stereo) are used, the speakers should have a
minimum rating of 100 W or more. When a single channel
(mono) is used, the speaker should have a minimum rating of 200
W or more. If a speaker whose rating is below that recommend-
ed is used, the speaker may be damaged. The impedance of the
speakers should be between 2 and 8 ohm.
For detailed information concerning connections between differ-
ent components and this unit consult their respective instruction
manuals and follow those recommendations precisely.
When wiring connecting leads into place secure them with clam-
pers and adhesive electrician's tape. Additionally, to prevent any
damage to the insulative coating of the connecting leads, protect
them with adhesive electrician's tape wherever they may come
into contact with any sharp edges.
Wire
all
connecting
leads
so
that
they
stay
well
clear
of
high-tem-
perature
areas
such
as
the
heater
exhaust
port.
To
operate
the
amplifier
and
car
stereo
properly,
install
the
contin-
uous
power
supply
lead
(orange)
and
the
accessory
power
lead
(red)
correctly.
If
the
leads
are
not
installed
correctly
or
are
not
connected
at
ali,
the
amplifier
and
car
stereo
will
not
work.
The
supplied
speaker
lead
with
green
stripes
is
not
used
for
a
sin-
gle
channel
(mono)
arrangement;
keep
it
in
case
you
need
it
in
future.

Connecting Leads (Supplied)
Commectna
the
Continuous
Power
Supply
Lead
(Orange)
Route
the
continuous
power
supply
lead
from
the
engine
com-
partment
to
the
passenger
compartment
and
connect
it
to
the
amplifier.
To
prevent
short-circuits,
make
sure
you
connect
all
the
other
leads
first,
then
connect
the
end
of
the
continuous
power
supply
lead
to
the
positive
(+)
terminal
of
the
battery.
Fusjble link
Passenger compartment —| —~»> Engine compartment
| : Cc ll th
Continuous
power
/
Fit
the
rubber
ether
iiss
ead
supply
lead
finally
connect
this
terminal
to
the
positive
(+)
termi-
nal
of
the
battery.
grommet into
the hole in
the car body.
Drill a hole in
the car body.
CAUTION
e The fusible link is a safety device
DO NOT DEFEAT ITS PURPOSE
e Should the fusible link blow
1)
Check
the
continuous
power
supply
lead
for
possible
cause
of
short
circuit.
2)
DO
NOT
replace
the
fusible
link
with
any
other
similar
fuse
available
on
the
market
or
bypass
the
fusible
link,
as
it
may
cause
damage
to
the
unit
or
to
the
car
electrical
system.
Contact
your
dealer
or
the
nearest
authorized
PIONEER
Service
Station
immediately.
Be
sure
to
bring
the
continuous
power
supply
lead
when
taking
the
unit
for
repair.
am
2.
Q.
oe
ED
4
Connecting Speaker Leads
This amplifier has a mode select switch to select two-channel out-
put (stereo) or one-channel output (mono). The speaker leads
must be connected to suit the mode selected. Connect the speak-
er jeads to the output terminals of the amplifier as shown in Fig. 1
and 2, paying attention to the polarities (+ and -) and lead colors.
When two channels (stereo) are used
e Set the mode select switch to the 2CH position.
Black,cover
Fig. 1

rocedure for Connecting Speaker Leads
Loosen the four output terminal screws at the rear of the amplifi-
er in the middle.
2. Insert each speaker lead terminal into an output terminal accord-
ing to the selected mode. (Fig. 1)
3. Tighten each output terminal screw.
4. Fit the large terminal cover. (Fig. 2)
When one channel (mono) is used P
e Set the mode select switch to the 1CH position. 1.
e The speaker lead with green stripes is not used; keep it in case
you need it in future.
Terminal
screw
Speaker
lead
terminal
pus
2
out
oe
Gray
cover
le
ee
ye
@
Output
terminal
8
Fig.
1
Fig. 2
Large terminal cover
e Pass the speaker
leads through the
large terminal cover,
then fit the cover.
Fig. 2

Procedure for Connecting Continuous Power
Supply Lead (Orange) and Grounding Lead
(Black)
1. Pass the continuous power supply lead (orange) and the ground-
ing lead (black) through the small terminal cover. (Fig. 3)
2. Remove the screws of the continuous power supply terminal and
the grounding terminal at the rear of the amplifier on the left.
3. Replace the screws removed in step 2 in the terminals and tight-
en them. (Fig. 4)
4. Fit the small terminal cover. (Fig. 5)
Terminals
Continuous power
supply lead (orange)
Fusible link
Small terminal cover
Grounding lead
(black)
Fig.
3
ta
Zz
Q
24
a
=
Continuous power
supply terminal
Grounding
Terminal
screw
terminal
Continuous power
ISS supply lead (orange)
Grounding lead (black)
a
Small
terminal
cover
Fig. 4
Fig. 5

When
Combined
with
a
Car
Stereo
with
DIN
Sockets
@ See Note 1.
=
*
Car
stereo
with
S)
reen
stripes
DIN
sockets
Left-side speaker
©
Black stripes
Fuse for continuous
Right-side speaker
power supply
Connect to metal body or chassis.
Fusible link
Connect all the other leads, and
finally connect this terminal to
the positive (+) terminal of the
battery.
=
a
oe
zi
|
|
|
|
Do not connect anything
To electric terminal controlled by
to this terminal.
ignition switch (12 V DC) ON/OFF.
Note 1:
e
Connection
of
the
speaker
leads
for
two
channels
(stereo)
minal
(clock
illumination,
small
is
different
from
connection
of
the
speaker
leads
for
one
lamp
circuits,
etc.)
of
the
car's
channel
(mono).
(See
“Connecting
Speaker
Leads”
on
lighting
switch.
Fuse
holder
page
5.)
Connect to the positive (+) ter-
Yellow lead

When
Combined
with
a
Car
Stereo
with
RCA
Pin
Jacks
@ See Note 1.
reen stripes
_-Biack stripes
Left-side speaker
Fuse for continuous
Right-side speaker
power supply
Connect to metal body or chassis.
Fusible link
Connect
all
the
other
leads,
and
finally
connect
this
terminal
to
the
positive
(+)
terminal
of
the
battery.
6x
To
electric
terminal
controlled
by
Red
lead
ignition
switch
(12
V
DC)
ON/OFF.
Do not connect anything to this
lead
(connect
the
yellow
lead
of
a car stereo equipped with pin
jacks to the proper lead desig-
nated locations).
Yellow lead
Fuse holder
io] Red White
e When connecting connecting leads with RCA pin
plugs (sold separately) to the auxiliary input jacks
(red and white) of this unit, connect the right channel!
to the red jack and connect the left channel to the
white jack.
-HSITDNa
Car stereo with
RCA pin jacks
Red
White
Connecting leads with RCA
pin piugs (sold separately)
Blue lead
Blue lead
Connect the male terminal of this lead to the blue lead of the
car stereo (system control terminal). The female terminal
can be connected to auto-antenna relay control terminal.
Note 1:
e Connection of the speaker leads for two channels (stereo)
is different from connection of the speaker leads for one
channel (mono). (See “Connecting Speaker Leads” on
page 5.)

Installation
¢
Be
sure
to
use
the
parts
supplied
and
install
the
unit
securely.
If
parts
other
than
those
supplied
(specified)
are
used,
they
may
loosen
or
cause
damage
to
internal
Parts.
e
Be
sure
to
install
the
unit
ina
places
where
the
driver
is
not
both-
ered
and
where
there
is
no
danger
of
passengers
being
injured
in
case
of
sudden
stops.
Be
sure
to
consult
your
dealer
before
making
any
holes
in
the
car.
Cooling
efficiency
is
degraded
by
making
installations
in
hot
places
such
as
near
the
heater
outlet,
in
the
glove
compartment
and
under
floor
mats
that
are
tightly
closed.
¢
To
prevent
short-circuits,
be
sure
to
disconnect
the
negative
bat-
tery
terminal
before
wiring
the
system
up.
When
you
finish
the
installation,
be
sure
to
make
one
more
check
to
be
sure
everything
is
done
correctly.
Reinstall
all
car
parts
that
were
removed.
Reconnect
the
negative
battery
lead.
Example
of
Positions
of
Installation
Under
the
front
seat
Inside the trunk
(Drill
a
hole
into
the
Passenger
compartment
and
pass
the
leads
through
it.)
10
@
Attaching
the
Brackets
Using
the
5
x
6
mm
screws
supplied,
attach
the
supplied
pair
of
brackets
to
the
bottom
face
of
the
unit
as
shown
in
Fig.
1.
If
the
unit
is
installed
directly
on
the
car
floor
without
using
the
supplied
brack-
ets
it
may
overheat,
causing
the
protection
circuitry
to
operate.
Screw
(5 x 6 mm)
Bracket
Fig. 1
@
For
Installationon
the
Floor
Mat
or
Chassis
Install
the
unit
on
the
floor
mat
or
the
chassis
using
the
supplied
tap-
ping
screws
(5
x
16
mm).
(Fig.
2)
Tapping screw 4
(5
x
16
mm)
Y
Bracket
Drill 3 mm
diameter holes.
Fig. 2