Custom Autosound USA-630II second series User Manual

Page 8

Receiver Basic Operation

1. Switch the receiver “ON” by depressing the Power ON/OFF Volume control knob (1).
2. Depress the Band Selector( 3) to the desired position. In the AM mode, AM

will be visible in the LCD display (10). In the FM mode, one of FM1, FM2 or FM3

will appear on the LCD Display (10).

3. Depress the MODE button (4) to toggle the functions of the radio .Depending on what
source you have plugged in the sequence displayed will be : Radio—USB—CDC—AUX—
iPOD radio.

Radio Station Tuning

Seek Tuning:

To tune the receiver a slight turn and release will seek the next available radio station. A
clockwise rotation tunes the radio up-wards and counter clockwise tunes the radio down-
wards.

Manual Tuning:

To manually tune the receiver a slight turn and hold (the lcd display will show (MANUAL)
until the desired station is shown on the display. The tuner will stay in manual mode for 5
seconds unless the tuning knob is turned again. After 5 seconds the tuning will revert to
auto seek.

RDS Radio mode
1. Turn radio to an FM station
2. Press and hold the MODE button for 2 seconds to turn TA of or on.
3. Press and HOLD tuning knob (4) for 2 seconds then release to gain access to the
Loudness, Digital EQ, and PTY functions. Each press of the tuning knob will advance to
the next function, use the volume knob to select PTY function such as News / Affairs /
Sports / Info .....etc.

BAND

TUNING/SELECT

PRESS

ON/OFF

VOLUME

MODE

CHANGE BUTTON

fig.3

Noise Suppression
All CAM Systems are designed for maximum electrical noise rejection. In some instal-
lations however, electrical noise may affect the quality of sound reproduction.
If noise is present after installing the USA-630, identify the source of the noise using
the descriptions under Sources Of Electrical Noise. To eliminate the noise follow the
procedures described under Elimination of the specific noise source.

Noise Suppression
1-Check all ground connections. Remove paint from painted surfaces to secure a

good electrical ground.

2-Check battery posts. If contacts are corroded or loose, clean and tighten both

terminals.

3-Check battery or add fluid.
4-Check condition of spark plug and distributor leads. Worn or damaged leads will

generate noise than can be very difficult to eliminate.

5-Check installation of factory noise suppressor(s). Verify that the connections are

. .

solid. Refer to the vehicles service manual for nose suppressor location or allow a

qualified mechanic to inspect the device(s) for you.

6-(Optional) Some professional installers will install a simple L.C. noise filter even if

. .

there is no noise present in the system. This is a simple and relatively inexpensive

device available at your nearest Autosound dealer or electronic supply store. Most

filters designed for car stereos carry a current rating of 3 amps or more. Follow the

manufacturers installation instructions. This filter is installed in the power lines of the

car stereo.

Sources Of Electrical Noise

Alternator Noise
This noise is generally a high pitch whine present with the engine running.The pitch of
the whine will vary as engine RPM varies. Alternator noise usually becomes more
apparent with an electrical load to the system. Switching the headlights on usually
increases the noise.
Elimination
1. Install an L.C.noise filter (available from your Autosound dealer or your nearby

electronic or automotive supply store) in the power lines of your USA-630. This filter

. .

should be rated at 3 amps minimum.
2. Start the car’ s engine.switch on the lights (to accentuate the noise) and switch

. .

on the USA-630. If noise is still present, proceed to step 3.
3. Install an alternator noise filter (available from your Autosound dealer or your

. . .

nearby electronic or automotive supply store). Follow manufacturer’ s installation

instructions.