Jensen JRV210 User Manual download pdf (Page 17)

JRV210

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 often a result of

the radio being 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.

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 CB/A radio or electronic supply shops.

Interference

Radio reception in a moving environment (automobile) is very different from reception in a

stationary (home) environment. AM reception will deteriorate when passing through a tunnel or

when passing under high voltage lines. Noise can be picked up from passing automobiles.

Although AM is subject to environmental noise, it can received at great distances. This is

because broadcasting signals follow the curvature of the earth and are reflected back by the

upper atmosphere.

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Jensen JRV210 User Manual Page 17