Custom Autosound USA-1 - 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 pro-
gram memory and the clock circuit when the USA-1 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 amplifier
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-1 is equipped with low level, high impedance outputs. The low level
outputs (RCA type Line Out Jack) will not drive speakers. If you are connecting
an amplifier or plan on it in the future, it is recommended to use these leads. It
makes for a cleaner and easier Installation.
Auxiliary Input
This feature is for connecting optional portable audio devices such as:
CD/MP3/TV/DVD/iPod, Satellite Radio etc. An extension lead for quick con-
nect/disconnect is included (connect to RCA’s “CD-IN” at rear of radio).
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Maintenance
It is recommended that the tape head and capstan be cleaned after every 10-15 hours
of play. Liquid tape head cleaners may be used following manufacturer’s instructions or
you may use denatured alcohol applied with a cotton swab. Most tape head cleaning
cassettes should not be used as they may damage the tape head due to the abrasive
textured coating they employ. Use of such tapes may void your warranty.
The tape head should also be demagnetized after every forty hours of play. Tape
demagnetizing cassettes should be used Do not open the unit to use discrete demag-
netizes. Either use the special cassette or let your Autosound dealer perform this serv-
ice .The tape head is delicate and easily damaged if you don’t know what you are
doing.
Noise Suppression
All CAM Systems are designed for maximum electrical noise rejection. In some installa-
tions however, electrical noise may affect the quality of sound reproduction.
The procedures described under Noise is present after installing the USA-1, identify the
source of the noise using the descriptions under Sources Of Electrical Noise. To elimi-
nate 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 when 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-1. 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-1. 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.