Troubleshooting - Jensen VR187 Owner's Manual

Troubleshooting

Problem Cause
No power. Vehicle ignition switch is not on. If the power supply is connected to the
The fuse is blown.
Disc cannot be loaded There is a disc already inside
or ejected. the unit.
Inserting disc in wrong direction. Insert disc with label facing up.
Disc is defective or dirty.
Excessive temperature in
vehicle.
Condensation has collected.
No sound. Volume turned down too low.
Wiring not connected properly.
Sound skips or sound Installation angle exceeds 30
quality is poor. degrees.
Disc is defective or dirty.
Cassette is defective.
Operation keys do not Microcomputer is not operating
work. properly due to noise.
Radio does not work Antenna cable not connected.
Automatic station Radio signals are too weak.
selection does not
work.
Front panel will not Front panel not centered
motorize back into unit
The display is dark Direct sunlight reflecting off
screen
Incorrect color/brightness
settings
Remote control does Batteries are weak
not work
Direct sunlight interfering with
infrared sensor
Corrective Action
vehicle accessory circuits but the
engine is not turned on, switch the
ignition key to "ACC".
Replace the fuse.
Remove the current disc and insert the
new one.
Clean disc or try playing another one.
Cool vehicle to a normal temperature.
Turn player off for an hour, then try
again.
Adjust volume until sound is heard.
Check wiring connections.
Adjust the installation angle to less
than 30 degrees.
Clean disc or try playing another one.
Try playing another cassette.
Press RESET.
Insert antenna cable firmly.
Select a station manually.
Re-center the left/right manual swivel
adjustment
Close windows and/or sunroof
Adjust color/brightness settings
Replace batteries
Close sunroof or try to reduce amount
of sunlight in car
Ignition and Interference Noise
Ignition Noise
The most common source of noise in reception is the ignition system, due to the fact that the
radio is placed relatively 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.Generally, the
ignition noise can be suppressed considerably by using a radio suppression high-voltage
ignition wire and suppressor resistor in the ignition system. Additional noise suppressors may
also be used and can be obtained from most CB/amateur radio or electronic supply stores.
Interference Noise
Radio reception in a moving environment is very different from stationary reception. For
example, AM reception will deteriorate when passing through a tunnel or under high-voltage
lines. Also, noise can be picked up from passing vehicles. Although AM is subject to
interference, it has the ability to be received at great distances because the broadcasting
signals follow the curvature of the earth and are reflected back by the upper atmosphere.
Maintenance
System Maintenance
The following maintenance tips will extend the life and optimize the performance of the unit.
• Keep the unit dry. If it is exposed to moisture, wipe it dry immediately. Liquids may contain
minerals that can corrode the electronic circuits.
• Keep the unit away from dust and dirt, which can cause premature wear of parts.
• Handle the unit carefully; dropping it can damage circuit boards and cases, causing the
product to malfunction.
• Clean the unit occasionally by wiping it with a damp cloth. Do not use harsh chemicals,
cleaning solvents or strong detergents to clean the product.
• Use and store the unit only in mild temperature environments. High temperatures can
shorten the life of electronic products, damage batteries and distort/melt plastic parts.
•
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VR187