www.nkrowing.com.au
6
• Does the unit charge with a different charger? If so, then the fi rst charger
is bad. If you suspect that your charger is not working correctly you can
perform the following test:
Obtain a multimeter—almost any type will do. Turn the multimeter
on and set it at 20 VDC. After plugging the charger in (be VERY
careful, the charger is ON!), place the positive lead from the
multimeter on the plus pin, and the negative lead from the
multimeter onto the ground pin. The multimeter should read
between 13.5V -15V. Any deviation from this range indicates that
the charger is not working. If you do not get any voltage reading on
the multi-meter, the internal transformer is damaged the charger
must be replaced.
—Have the batteries exceeded their lifespan?
A Cox-Vox Battery is expected to provide 3 years of normal use (daily practices for approximately six to nine
months of the year). If you know your unit’s batteries are older than three years, we recommend that the unit be
returned to NK for new batteries and servicing. We can often check our records to determine the age of your unit’s
batteries.
ground
plus
nd
plus
NOTE: NK NO LONGER REPAIRS CHARGERS!
If you wish to repair a charger plug, you may obtain pins and instructions from NK. However, for most
people, the most cost- and time-effective approach is simply replacement.
!
No Audio/Intermittent Audio/Static
—Is the wiring clean of cuts or nicks?
Cuts or nicks in the wiring are the most frequent causes of audio problems. Be sure that all of the connectors
(pins, sockets, plugs, receptacles) are not damaged and are positioned properly.
— Is the microphone working properly?
The microphone may be the cause of failure. Test the system with a microphone you know is good. Note: A
damaged microphone often causes static.
— Are the connectors (pins, sockets, plugs, receptacles) properly positioned?
See
installation.
— Are the speakers working properly?
Be sure all of the speakers are plugged in properly and are in working order (replace one at a time with a
known good speaker to test). If you are getting a loud squealing noise, try pointing the speakers away from
the coxswain to minimize feedback.
