Rockford Fosgate RFX Serie Installation Et Fonctionnement page 47

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S
YMPTOM
Radiated Noises No RF suppression
of blower motors
No RF suppression
of switches
CD skips Source unit mounted at
an incorrect angle
excessively
Source unit not secured
properly (Standard
Mount)
Source unit not secured
properly (ISO Mount)
Source unit is not ground-
Engine Noise
ed properly
Noise is radiating into
RCA signal cable
Bad component in the
signal chain
Noise is radiating into the
speaker cables
Multiple grounds in the
audio system
D
IAGNOSIS
Connect filter cap (Radio Shack #272-
1085) in-line on B+ as close to blower
motor as possible
Connect a .1µf – .01µf non-polarized
capacitor across switch contacts
Check mounting angle of source unit
(mount within ±20˚ from horizontal)
and repair as necessary
Check tightness of installation sleeve
and back strap; repair or replace as
necessary
Check tightness of mounting screws
and repair or replace as necessary
Check connections and repair wiring
as necessary
Check connections, run the RCA
cables on a different route away from
sources of high current
Check connections. Bypass all compo-
nents between the Source unit and the
amplifier. Connect one component at a
time to determine the culprit. Repair or
replace components as necessary
Disconnect speakers and connect a
test speaker to the output terminals or
the source unit. If noise is gone,
reroute the speaker cables away from
sources of high current
Check ground connections and
connect amplifiers, signal proces-
sors, and other components to a
central location or try a different
grounding point on the chassis
– 44 –
R
EMEDY