TROUBLESHOOTING GUIDE
BEFORE GOING THROUGH THE FOLLOWING CHART, BE SURE THE BATTERY PACK IS FULLY
CHARGED. The POWER LAMP should light up when the unit comes on. The POWER LAMP will grow
dim as the batteries discharge. Keep the batteries fully charged when not in use to insure long battery
life. Continuous charging will not harm the battery pack, although it is not necessary. In extreme cases
a continuous charge of ten days may be necessary to restore a deeply discharged battery pack. If the
battery pack still will not except a charge after ten days then the pack will need to be replaced. See
page 2 for charging instructions.
It is important to follow these steps in the sequence listed.
SYMPTOM
POSSIBLE CAUSE
POWER LAMP NOT ON
1) Amplifier turned off. Check that input cable is fully
plugged in.
2) Battery pack discharged. Recharge unit.
CHARGING LAMP NOT ON WITH CHARGER PLUGGED INTO CHARGING JACK
1) CH-40 not plugged into 110V supply.
2) 110V supply switched off or defective. Check
110V outlet for voltage by plugging in a lamp or
other AC device.
3) CH-40 charger defective.
NO SOUND FROM SPEAKER
1) Volume turned down. Check Volume control.
2) Input cable not plugged in.
3) Mic muted. Check mute switch on microphone
body if this feature is included on your equipment.
4) Defective mic or cable.
INTERMITTENT AUDIO OR "CRACKLING" SOUND FROM SPEAKER
1) Defective mic or cable. Try different mic and
cable.
2) Dirty cable plugs. Clean cable ends with clean
alcohol and a clean soft cloth. A brand new cord
stored in a sealed container such as a plastic bag
will give off a gas that forms a coating on the
plugs ("outgassing"). This coating can cause
improper contact when the plug is connected to
the jack on the equipment. It will appear that the
cord is defective. It is a good idea to clean the
cord periodically, and after the system has been
stored. Clean the plugs with alcohol and a clean
cloth.
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