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JBR550
10
CARE AND MAINTENANCE
Keep the product dry. If it does get wet, wipe it dry immediately. Liquids might contain
minerals that can corrode the electronic circuits.
Keep the product away from dust and dirt, which can cause premature wear of parts.
Handle the product gently and carefully. Dropping it can damage circuit boards and
cases, and can cause the product to work improperly.
Wipe the product with a dampened cloth occasionally to keep it looking new. Do not use
harsh chemicals, cleaning solvents, or strong detergents to clean the product.
Use and store the product only in normal temperature environments. High temperature
can shorten the life of electronic devices, damage batteries, and distort or melt plastic
parts.
Ignition
The most common source of noise in reception is the ignition system. This is a result of the
radio being placed too close to the ignition system (engine). This type of noise can be easily
detected because it will vary in intensity of pitch with the speed of the engine.
Usually, the ignition noise can be suppressed considerably by using a radio suppression type
high voltage ignition wire and suppressor resistor in the ignition system. (Most vehicles employ
this wire and resistor but it may be necessary to check them for correct operation.) Another
method of suppression is the use of additional noise suppressors. These can be obtained from
most professional mobile electronics retailers.
Interference
Radio reception in a moving environment is very different from reception in a stationary
environment (home). It is very important to understand the difference.
AM reception will deteriorate when passing under a bridge or when passing under high voltage
lines. Although AM is subject to environmental noise, it has the ability to be received at great
distance. This is because broadcasting signals follow the curvature of the earth and are
reflected back by the upper atmosphere.
TROUBLESHOOTING
Symptom Cause Solution
No power The vehicle’s accessory
switch is not on
If the power supply is properly
connected to the vehicle’s acces-
sory terminal, switch the ignition
key to “ACC”.
The fuse is blown Replace the fuse.
Disc cannot be loaded or
ejected
Presence of CD disc inside
the player
Remove the disc in the player and
insert the new one.
Inserting the disc in reverse
direction
Insert the compact disc with the
label facing upward.
Compact disc is extremely
dirty or disc is defective
Clean the disc or try to play a new
one.
Condensation Leave the player off for an hour or
so, then try again.
No sound Volume is too low Adjust volume to audible level.
Wiring is not properly con-
nected.
Check wiring connections.
The operation keys do
not work
Control panel not properly
installed
Reinstall control panel.
The built-in microcomputer
is not operating properly
due to noise
Press the RESET button.
Sound skips The installation angle is
more than 30 degrees.
Adjust the installation angle to
less than 30 degrees.
The disc is dirty or defec-
tive.
Clean the disc and try to play
again or use new disc.
Cannot tune to radio sta-
tion, auto-seek does not
work
The antenna cable is not
connected.
Insert the antenna cable firmly.
The signals are too weak. Select a station manually.
12


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