© 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER
is a trademark of Linear Power, Inc.
5
If the vehicle is in need of ignition repair or tune up, increased noise will result.
Specifically, check the condition of points and condenser, as well as the spark
plug leads. Don't forget to check for resistor plugs, too.
TROUBLESHOOTING NOISE
Once the type of noise has been determined, the entry method must be isolated.
The easiest place to start is the amplifier. Unplug the RCA jacks and listen for a
change in the noise level. If little or no change occurs, the amplifier's power is
contaminated. If the noise is gone, the possibilities are a ground loop or a noise
problem earlier in the system. If the problem is a ground loop, the best solution is
a better ground for the amp(s). Another solution is to carefully connect a wire
from the shield of the RCA connector, at the amplifier end, to a good ground on
the vehicle. This will effectively short circuit the ground loop.
The next check is for radiated noise. With the deck still electrically connected to
the vehicle, slowly remove it from its installation, and listen for a change in noise
level. Any reduction would indicate that noise was being radiated directly into the
deck while it was in the dash. If you are dealing with radiated noise, the only
solution is isolation. The easiest method is usually to move the contaminated
wiring away from the stereo's wiring.
The best way to eliminate power line noise is to install a filter capacitor across
the noise source. The best capacitors to use are .5mfd 25v bypass capacitors for
the coil, as well as any accessory motors, and .1mfd 100v ceramic disc
capacitors for switches. Another way to suppress power line noise is with noise
filters.
SERVICE OR REPAIR
To obtain service or repair, please contact our authorized
LINEAR POWER™
product service center:
T.I.P.S. INC.
3455 Lanell Lane, Pearl, MS 39208
(601) 932-8477
E-mail: [email protected]
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