Audio2000's AKJ7404 manual Troubleshooting

Models: AKJ7404

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TROUBLESHOOTING

MAINTENANCE

When the set gets dirty, wipe with a soft, dry cloth. If the set is extremely dirty, soak a soft cloth in a 5 to 6% solution of dishwashing detergent to water, wring it tightly, wipe the dirt away, and finally wipe the set with a dry cloth.

Never use alcohol, thinner, benzine, insecticide or other volatile agents, as they may damage the surface paint or gloss of the set.

Also do not wipe the set with a chemical cloth or leave it on the set for a long period, as the surface finish may be damaged or the paint may be stripped off.

TROUBLESHOOTING

Should problems occur, they are, in many cases, due to simple operation mistakes or the like. On the basis of the following checks, you will be able to rectify a number of problems yourself without difficulty.

If the problem cannot be remedied after the following checks, please consult your dealer.

PROBLEM

POSSIBLE CAUSES

SOLUTIONS

 

 

 

 

Power is off.

Turn on the mixer.

No power

AC power cord is unplugged.

Plug the AC power cord to an AC power outlet (120V).

 

The fuse inside the transformer is open.

Send the mixer to an authorized service center.

 

 

 

 

One bad RCA cable or one poor RCA contact.

Make sure that all RCA cables are not damaged and all

 

RCA contact points are proper.

 

 

One Side

One U-shaped connector is not inserted into the

Make sure all the U-shaped connectors are properly

No Sound

music effect jacks or one U-shaped connector is not

inserted.

properly inserted.

 

 

 

 

 

 

The electrical signal from the output of the player to

Turn down the master volume control of the player and

Distorted

turn up the volume control of the mixer to maintain the

the mixer is over the limit of the input of the mixer.

sound

 

same sound level.

Incorrect AC Voltage (The AC power cord is plugged

Make sure the AC power cord is plugged to an AC power

 

 

to a 240V outlet or to an unstable 120V outlet).

outlet with a correct and stable AC voltage.

 

Incorrect input selection.

Make sure the input source selection button is set correctly.

 

The input level on the rear panel is set to the minimum

Adjust the input level control.

 

position.

 

 

No sound

Music volume control knob is turned all the way down

Turn the music volume knob to a position that the

(zero sound output).

sound level is desired.

 

 

Both U-shaped connectors are not inserted into the

Make sure all the U-shaped connectors are properly

 

music effect jacks or not properly inserted.

inserted.

 

Bad cable or poor contact.

Make sure that all cables are not damaged and all

 

contact points are proper.

 

 

 

The microphone cable is not plugged into the

Make sure the microphone cable is plugged into the

 

microphone input jack properly.

microphone jack properly.

No microp-

 

 

The switch on the microphone is set to “OFF”.

Set the switch on the microphone to “ON”.

hone sound

The corresponding INDIVIDUAL MIC VOLUME control or the

Adjust the volume control.

 

MASTER MIC VOLUME control is in the minimum position.

 

 

 

 

 

 

The U-shaped connector is not inserted into the MIC

Make sure the U-shaped connector is properly inserted

 

EFFECT jacks or not properly inserted.

into the MIC EFFECT jacks.

 

A condenser microphone is used.

Change the condenser microphone to a dynamic microp-

 

hone or a condenser microphone accepting battery power.

 

 

Humming

Grounding problems between two adjacent equipments.

Try to use an isolator to remove the grounding problems.

noise

 

 

ETIQUETTE OF SOUND

The karaoke performance you enjoy may be disturbing noise to others.When performing karaoke,be sure to be considerate of your neighbors.

The volume of karaoke is at your command. Remember that even small sounds transmit very well in the quiet night. Be specially careful in karaoke performance at night.it is recommended to close the windows to avoid sound leakages to the neighbors.Avoid noise pollution to protect the comfortable living environment of those around you.

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Audio2000's AKJ7404 manual Troubleshooting