TROUBLESHOOTING

Before going through the check list, check wiring connection. If any of the problems persist after

check list has been made, consult your nearest service dealer.

Symptom

Cause

Solution

 

 

 

No power

The car ignition is not on.

If the power supply is properly connected to

 

 

the car accessory terminal, switch the ignition

 

 

key to “ACC”

 

 

 

 

The fuse is blown.

Replace the fuse.

 

 

 

Disc cannot be

Presence of CD disc inside

Remove the disc in the player, then

loaded or ejected

the player.

put a new one.

 

Inserting the disc in reverse

Insert the compact disc with the

 

direction.

label facing upward.

 

 

 

 

Compact disc is extremely

Clean the disc or try to play a new one.

 

dirty or defective disc.

 

 

 

 

 

Temperature inside the car is

Cool off or until the ambient temperature

 

too high.

returns to normal.

 

 

 

 

Condensation.

Leave the player to off for an hour or so,

 

then try again.

 

 

 

 

 

No sound

Volume is in minimum.

Adjust volume to a desired level.

 

Wiring is not properly

Check wiring connection.

 

connected.

 

The operation keys

The built-in microcomputer is

Press the RESET button.

do not work

not operating properly due to

Front panel is not properly fixed into

 

noise.

its place

 

 

 

Sound skips.

The installation angle is

Adjust the installation angle to less

more than 30 degrees.

than 30 degrees.

 

 

 

 

 

The disc is extremely dirt or

Clean the compact disc. Then try to play a

 

defective disc.

 

new one.

 

 

The radio does not

The antenna cable is not

Insert the antenna cable firmly.

work.

connected.

 

The radio station

 

 

The signals are too weak.

 

automatic selection

Select a station manually.

does not work.

 

 

 

 

 

ERROR

Mechanism Error

Press the eject button to correct the problem.

If the error code does not disappear, consult

 

 

 

 

your nearest service dealer.

 

 

 

Disc Error

Maybe disc dirty / disc scratched

Replace the disc.

 

/disc upside down.

 

 

 

 

If at any time in the future you should need to dispose of this product please note that Waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice.(Waste Electrical and Electronic Equipment Directive)

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Boss Audio Systems BV7940 manual Troubleshooting, Symptom Cause Solution