Care And Maintenance; Troubleshooting - Jensen JWM40 Installation And Owner's 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
receive at great distance. This is because broadcasting signals follow the curvature of
the earth and are reflected back by the upper atmosphere.

TROUBLESHOOTING

Symptom Solution
Radio will not turn Try the reset button.
ON or No front panel
Check fuse.
operation
Check 12V+ on accessory wire to radio (RED wire)
Check Ground.
Radio turns ON, but Verify Volume, Fader/Balance, Mute controls are set correctly (see
no sound owner's manual).
Try the reset button.
Verify proper speaker selection.
Verify proper speaker connections.
Check for shorts or open circuits on speaker wires.
 If short on "A" channel, "B" channels will continue to function.
 If short on "B" channels, "A" channel will continue to function.
CD/DVD does not Make sure unit has power and no other CD/DVD is currently inside.
load fully
Make sure transport screw has been removed from rear of unit. Disc
will load for several seconds and then eject if transport screw has not
been removed.
CD/DVD does not Check to make sure disc is inserted correctly.
play correctly
Verify disc is free from dirt, scratches, etc.
Check with factory CDs.
Inspect radio's chassis to verify shipping screw(s) have been
removed.
Check factory original CDs for compatibility warnings (due to various
copy-protection, multimedia content, etc.).
No AM or FM Verify you are tuned to a valid station.
reception
Check your antenna connection on rear of stereo.
Try a different antenna
DVD plays sound but Make sure the HDMI cable is routed from the HDMI output to the
no video input on the television.
Unit does not Verify that you have a clear line of sight for the IR signal.
respond to Remote
Check the batteries.
Control
Confirm the remote IR sensor in plugged into IR input (if
applicable).
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JWM40