Push the battery compartment cover
opposite direction to the arrow back in order to close
the battery compartment
Troubleshooting
= Problem
= Cause
= Solution
The LED lamps
The batteries
Replace the used batteries
(see: "Changing the batteries").
The batteries
Check the correct polarity of the batteries
(see: "Inserting the batteries").
Cleaning and maintenance
CAUTION! Clean the precision engineer's LED magnify-
ing glass
Do not use corrosive or abrasive cleaners under any
circumstances.
Use a cleaning cloth for cleaning the product. Moisten it
a little if necessary.
Use a dry, fluff-free cloth for cleaning the lens.
16 GB/IE/NI
do not light up.
20
are flat.
21
have been inserted incorrectly.
21
very carefully in order to avoid scratches.
1
3
.
4
with new ones
21
back in the
21