Custom Autosound Manufacturing USA-630 B-Memory Back-Up-Orange Wire B+, D - Ground Wire - Black

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.

Power and Speaker Connections (Refer to Wiring Diagram on page 5.)

A-Main Power-Red Wire B+

Connect the RED wire (B+) to an accessory fuse that is switched OFF when the key switch is in the OFF position and is switched ON when the key switch is switched to the ON or accessory position. (This does not apply to cars with 6volt system)

B-Memory Back-Up-Orange Wire B+

Connect the orange wire (memory B+) to an accessory fuse that is always ON regardless of the position of the key switch.The lead supplies power to the program memory and the clock circuit when the USA-630 is switched off.(This does not apply to cars with 6volt system)

C-Power Antenna (Auto-Antenna) - Yellow Wire

This wire can be connected to the positive switch terminal of the relay for the auto antenna (if your car is equipped )or to the remote on switch of the ampli- fier or booster (if equipped). NOTE:DO NOT connect this wire to a negative position or to any device that requires high current Otherwise the radio may fail or become "fried". If your car is not equipped with an auto antenna,leave this wire sealed and do not allow it to short to any other positions.

D - Ground Wire - Black

Connect the black ground wire to any clean paint and contaminant free area of vehicle chassis.

NOTE: Proper grounding is essential for optimum performance of your radio.

E - Speaker Wires

Connect the speaker wires as shown in Figure 1.

Low Level Output (Line Out Jacks) Connection

The USA-630 is equipped with low level, high impedance outputs. The low level outputs (RCA type Line Out Jack) will not drive speakers. If you are con- necting an amplifier or plan on it in the future, it is recommended to use these leads. It makes for a cleaner and easier Installation.

AUX Line - Out Line - Out

Input	Rear	Front
R L	L R	L R

CD Changer

iCAMKIT

Input

USB

Input

Antenna	Fuse
	Box
Input

11 4