JWM40
19
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
ON or No front panel
operation
Try the reset button.
Check fuse.
Check 12V+ on accessory wire to radio (RED wire)
Check Ground.
Radio turns ON, but
no sound
Verify Volume, Fader/Balance, Mute controls are set correctly (see
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
load fully
Make sure unit has power and no other CD/DVD is currently inside.
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
play correctly
Check to make sure disc is inserted 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
reception
Verify you are tuned to a valid station.
Check your antenna connection on rear of stereo.
Try a different antenna
DVD plays sound but
no video
Make sure the HDMI cable is routed from the HDMI output to the
input on the television.
Unit does not
respond to Remote
Control
Verify that you have a clear line of sight for the IR signal.
Check the batteries.
Confirm the remote IR sensor in plugged into IR input (if
applicable).
