Custom Autosound USA-230 - Manual (Page 5)

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-230 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-230 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.
4 11
Antenna
Input
AUX
Input
Line - Out
Front
Line - Out
Rear
Fuse
Box
R L R L L R
Antenna Noise
A static or crackle heard through the speakers, usually when the car is running, but
sometimes present with the ignition off. If a crackling static if present, follow the steps
outlined below to confirm the antenna as the source of the noise.
1. Start the car engine.
2. Switch on the USA-230.
3. Adjust the volume so that noise is audible.
4. Reduce volume setting of the car stereo but do not switch it off. If noise decreas
. .
es or disappears, the signal is most likely being picked up by the car antenna. If . .
the noise persists after following the steps listed below, proceed to ignition Noise.
Elimination
1. Test or have tested the antenna lead for any breaks or shorts. Signs of crimping,
. .
kinking fraying or rust usually indicates damage to the cable. Replace the
antenna or cable if necessary.
Ignition Noise
A popping or crackling noise heard through the speakers. The noise will vary as the
engine rpm varies. The noise will Only be present with the engine running
Elimination
1. Install an L.C. Filter Network in the power lead of the USA-230. The filter should be
.
rated at a minimum of 3 amps.
2. Inspect spark plug and distributor cable for signs of wear or damage. Replace as
.
necessary using resistor cable only. Metal conductor ignition cables increase
. static interference.
NOTE: Do not use spark plug or distributor noise filters as these can create more prob-
lems than they can solve. They decrease the quality of the spark generated by the
spark plugs and they may create more static than they eliminate.
Electrical Noise
A popping heard when the lights, turn indicators, windshield wipers, cigarette lighter,
etc. are switched on indicate a vehicle wiring deficiency. Most occurrences are minor
and preset no risk to the stereo system other than the annoyance to the listener.
However, severe cases may damage the speakers, minor occurrences can be reme-
died. A professional must attend to severe occurrences, as they present a threat to not
only the stereo system but to the vehicle wiring itself.
Elimination
1. Install an L.C. Filter Network in the power leads of the USA-230. The filter should
be rated at a minimum of 3 amps.
2. If the noise persists, consult a professional automotive service technician.