EXFO DC0091A - Manual (Page 2)

DC0091A November 2001 2/3
Solutions to Common Problems
Problem Cause Solution
The unit does not
power up.
The battery pack is
discharged.
➤
Charge the battery pack.
➤
Replace the battery pack with a
fully charged one.
➤
Connect the FTB-100/FTB-100B to
an external power supply using the
AC/DC adapter/charger.
The FTB-100/FTB-100B
is not connected to an
external power supply.
➤
Connect the FTB-100/FTB-100B to
an external power supply using the
AC/DC adapter/charger.
The external power
supply is unplugged.
➤
Make sure the external power
supply is plugged in at both ends.
Unit screen
is dark a .
The FTB-100/FTB-100B
backlight is off.
➤
Press the Backlight button.
External keyboard is
not working.
External keyboard has
not been detected.
➤ Unplug the keyboard and then plug
it again.
➤
Turn off the FTB-100/FTB-100B,
plug in the keyboard, and turn on
the FTB-100/FTB-100B.
Screen characters are
dim.
The Contrast and/or
Brightness control(s)
are not set properly.
➤
Adjust the Contrast and Brightness
controls.
The battery indicator
remains low after a full
charge.
The battery is not
properly calibrated.
➤
Perform a complete battery
recalibration, i.e. a full discharge,
immediately followed by a full
charge.
The touchscreen
needs to be
recalibrated frequently.
The 9 V battery is too
low.
➤
Replace the 9 V battery.
You took longer than
one minute to replace
the main battery.
➤
Have your fully charged
replacement main battery on hand
before changing the discharged
one.
The unit operating
time is reduced.
The NiMH main battery
is probably worn-out.
➤ Replace the NiMH main battery.
The NiMH main battery
was not fully charged.
➤
Charge the NiMH main battery.
➤
Perform a complete battery
recalibration b .