Care And Maintenance; Troubleshooting - Jensen MS40BT Installation And Operation Manual

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 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 vessels 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 CB/A radio or electronic supply shops.
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
No power The vessel's accessory
switch is not on
Fuse is blown
No sound Volume too slow
Wiring is not properly
connected
The operation keys do The built-in
not work microprocessor is not
operating properly due to
noise
Cannot tune to radio Antenna cable is not
station, auto-seek does connected
not work Signals are too weak.
15
MS40BT
Solution
If the power supply is properly
connected to the vessel's
accessory terminal, switch the
ignition key to "ACC".
Replace the fuse.
Adjust volume to audible level.
Check wiring connections.
Press the reset button (19).
Insert the antenna cable firmly.
Select a station manually.