UEi Test Instruments AK900SC - Manual (Page 23)

23
Troubleshooting
If the unit is not performing properly, please use this troubleshooting
chart. Try the listed actions under the appropriate problem, in order
from top to bottom until the problem is resolved. If these steps do not
correct the problem, please contact the manufacturer for service.
Symptom Action
No display
when PWR
pressed
• Increase LCD contrast. If no response, press
PWR and try increasing contrast again.
• Check if battery is installed. Install fresh
batteries and try again.
• Check polarity of batteries
• Follow the battery replacement
procedures. If any batteries were left
installed in reverse for some time, they
may be drained. Remove the old set,
wait 30 seconds, and install a fresh set.
• If the unit is hot to the touch, allow unit to
cool and try again.
Strange
characters or
patterns seen on
display
• Press 1SEC/5SEC/HOLD to exit from any
test mode displays entered accidentally
• Press PWR to turn the unit off and back on
• If the unit has been exposed to extreme cold,
allow unit to warm above -4°F (-20°C) and
try again
• If the unit has been exposed to extreme heat,
allow unit to cool below 122°F (50°C) and try
again
• Remove batteries, hold PWR key for several
seconds, and reinstall batteries