Pioneer GM-X404 Manual de serviço - Página 12

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GM-X404,X304

10. OPERATIONS AND CONNECTION(GM-X404/X1H/UC)

(2)

(4)

(5)

(6)

(7)

(4)

[8]

Setting of this Unit

(Fig. 9)

{1} Power indicator

The power indicator lights when the

power is switched on.

{2] RCA Input Select Switch

Fortwo-channel input, slide this switch

to the left. For four-channel input, slide

this switch to the right.

[3] BFC (Beat Frequency Control) Switch

If you hear a beat while listening to an

AM broadcast with your car stereo,

change the BFC switch using a small

screwdriver.

[4] Input Level Adjustment

Adjusting the input fevel controls A and

B will help match the output of the car

stereo to the Pioneer amplifier. Input

level control A is used to adjust the

volume of speaker output A; Input level

contro! B is used to adjust the volume of

speaker ouput B. Normally, set the

switch to the "500 mV" position. If the

Output is low even when the volume of

the car stereo is turned up, turn these

controls clockwise. If there is distortion

when the volume of the car stereo is

turned up, turn these controls clockwise.

* Ifyou only use one input pin plug, set

the input level controls for speaker

outputs A and B to the same position.

(3]

(12}

Fig. 9

ipo

fas a

ae i

¢ Set the input level control to 500 mV

when this amplifier is connected to a

Pioneer car stereo with RCA output

jacks. If the sound is too low or dis-

torts, adjust the input level control.

[5] Speaker Out A: LPF (Low-Pass Filter)/

HPF (High-Pass Fitter) Select Switch

Set the LPF/HPF select switch as follows

according to the type of the speaker that

is connected to the speaker output

connector and the car stereo system:

Audio frequency

range tobe output

LPF | Very-low-frequency

(left)

Sub-woofer

OFF

Very-low-frequency

range to high-

frequency range

Speaker Type

Other than

(center)

sub-woofer

HPF

Low-frequency

Other than

range to high-

suib:wootor

(right)

frequency range

Set the LPF/HPF select switch to the HPF

(right) position if you want to cut the very-

low-frequency range because it is not

necessary for the speaker you use.

[6] Speaker Out A: Bass Boost Level

Control

Bass boost level control can boost the

level around the frequency selected by

the bass boost frequency control to 0 to

12 dB.

[11}

(17}

CTia4]

OOS

(20)

O@—!18)

Fig. 10

[7] Speaker Out A: Bass Boost Frequency

Control

You can select a bass boost frequency

from 40 to 120 Hz with the bass boost

control.

* [6] (7) can be adjusted only when the

LPF/HPF select switch is set to a position

other than HPF .

(8) Speaker Out 8: HPF (High-Pass Filter)

Select Switch

Set the HPF select switch as follows

according to the car stereo system and

the type of speaker connected to the

speaker output:

Audio frequency

range to be output

Speaker The

Very-low-frequency

range to high-

frequency range

Sub-woofir

HPF

Low-frequency

(right) | range to high-

frequency range

Other than

sub-woofe

Set the LPF/HPF select switch to the HPF

(right) position if you want to cut the ver;

low-frequency range because it is not

necessary for the speaker you use.