Fujitsu Ten 86271AJ67A, Technical Support Manual

Page: 31 / 125

31
SOUND IS DISCOMFORTING
Is sound noisy for Radio
mode only or ALL modes?
Check antenna system
Ex) Roof antenna
Antenna AMP
Antenna wire harness
In case of the
problem not fixed
Is sound noisy for
Radio mode or All
Check where it hap-
pens.
Mountains or tall
buildings cause
multi-path.
Airport or power line
causes radio noise.
Cell phone or other
wireless device is
close to Navigation
Head Unit?
Problem is
caused by
bad media/
iPod.
Replace or repair
speakers.
Sound output is noisy.
Is the sound noisy for
Radio mode or All
modes?
Is the noise heard even in
area with good radio re-
ception?
Is the noise heard only at
the specific area?
Move to an area with
good reception and
re-check for original
problem.
Replace the media/
iPod with a known-
good media/iPod and
re-check.
Does the problem
persist?
Check all speakers
(shorted, grounded).
All speakers are
good?
Aftermarket product is
installed?
Remove the product
and re-check for
original problem.
ALL modes
No
Yes
No
Yes
Radio
Yes
No
No
Yes
No
Yes
Yes
No
Condition: Sound poor, sound too low, sound
too loud, and sound distorted
Replace Navigation
Head Unit