Jensen VR187 Owners Manual - Page 18

Troubleshooting Problem Cause Corrective Action No power. Vehicle ignition switch is not on. If the power supply is connected to the vehicle accessory circuits but the engine is not turned on, switch the ignition key to "ACC". The fuse is blown. Replace the fuse. Disc cannot be loaded There is a disc already inside Remove the current disc and insert the or ejected. the unit. new one. Inserting disc in wrong direction. Insert disc with label facing up. Disc is defective or dirty. Clean disc or try playing another one. Excessive temperature in vehicle. Cool vehicle to a normal temperature. Condensation has collected. Turn player off for an hour, then try again. No sound. Volume turned down too low. Adjust volume until sound is heard. Wiring not connected properly. Check wiring connections. Sound skips or sound Installation angle exceeds 30 Adjust the installation angle to less quality is poor. degrees. than 30 degrees. Disc is defective or dirty. Clean disc or try playing another one. Cassette is defective. Try playing another cassette. Operation keys do not Microcomputer is not operating Press RESET. work. properly due to noise. Radio does not work Antenna cable not connected. Insert antenna cable firmly. Automatic station selection does not work. Radio signals are too weak. Select a station manually. Front panel will not Front panel not centered motorize back into unit Re-center the left/right manual swivel adjustment The display is dark Direct sunlight reflecting off screen Close windows and/or sunroof Incorrect color/brightness settings Adjust color/brightness settings Remote control does not work Batteries are weak Direct sunlight interfering with infrared sensor Replace batteries Close sunroof or try to reduce amount of sunlight in car VR187 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. • 18