Troubleshooting - AKG WMS400 CU 400 User Instructions

4 Charging
5 Cleaning
Important!
Important!

6 Troubleshooting

Problem
All LEDs dark.
All LEDs dark although at least one
charging slot is loaded.
STATUS LED flashing red.
8
the charger will not be subjected to vibrations during the charging cycle and will rest firmly on a hard
surface.
6. Items 1 and 2 above notwithstanding, if you wish to extend the useful life of rechargeable batteries be
sure to
• completely discharge the battery every time, i.e., not to charge the battery before the battery warn-
ing appears on the transmitter display (see also the WMS 400 manual);
• charge the battery fully every time, i.e., not to remove it from the charger before the charging cycle
is completed;
• avoid charging batteries at temperatures below +5°C or above +40°C. At these temperatures, the
charging cycle will not start and the STATUS LED will be lit orange.
The charging cycle will be resumed automatically as soon as the battery temperature returns to the
acceptable range.
• use no batteries other than the rechargeable types recommended in section 7 Specifications.
7. Rechargeable batteries will only reach their full capacity after several charging cycles.
8. If you insert a transmitter with a dry battery into the charger, the charging cycle will be stopped imme-
diately after the battery test and a few minutes of charging. The STATUS LED will start flashing red.
Although there is virtually no risk of damaging the transmitter or charger, it is good practice not to
insert transmitters using dry batteries into the charger.
1. Disconnect the DC cable from the rear panel DC 5 V jack.
2. Use a cloth moistened (not wet!) with water to clean the surfaces of the charger.
Never use caustic or scouring cleaners or cleaning agents containing alcohol or solvents since
these may damage the enamel or plastic parts.
Possible Cause
• No defect. STATUS LEDs are not activat-
ed before you insert a transmitter with a
battery into a charging slot.
1. AC adapter is not connected to power.
2. DC cable is no not connected to charger.
3. One or more charging contacts fail to
make contact with the transmitter.
4. Internal error.
• Charging cycle has been stopped:
1. Transmitter uses dry battery.
2. Charging contacts contaminated.
3. Inside temperature of battery is too high.
4. Inside temperature of charger is too high.
5. Battery defective (voltage <0.5 V).
6. Charger connected to incompatible power
supply whose output voltage is too high:
both STATUS LEDs flashing red.
7. Charger defective.
Remedy
• (Insert transmitter with rechargeable bat-
tery.)
1. Connect power supply to convenient
power outlet.
2. Connect DC cable to charger.
3. Check contacts for resilience, or clean
contacts.
4. Disconnect power supply or DC cable,
wait for 10 seconds, and connect again.
Should the problem persist, contact your
nearest AKG Service Center.
1. Remove transmitter from charging slot;
replace dry with rechargeable battery.
2. Clean charging contacts on charger and
transmitter with soft cloth.
3. Allow battery/charger to cool down,
charging cycle will resume when tempera-
ture returns to acceptable range.
Should the problem persist, contact your
nearest AKG Service Center.
4. Make sure there is enough free space
around charger to provide adequate heat
dissipation.
5. Replace battery.
6. Use original AC adapter supplied with
charger.
7. Contact your nearest AKG Service Center.
CU 400