Replacing The Secondary Fuses - Leica ST5020 Instructions For Use Manual

7.4 Replacing the secondary fuses

Prior to exchanging a fuse, always switch the instrument off and unplug the mains cord.
Defective fuses may be replaced only with the replacement fuses supplied together with the
instrument.
Important!
Follow the instructions below to make sure you select the correct replacement fuse for each
fuse holder.
Selecting the correct replacement fuse
The amp value (here: 2A) printed on the fuse and the amp value next to
the fuse holder on the rear panel of the instrument MUST be identical!
The fuse value is shown on the metal caps
of the replacement fuses - the imprint look-
ing more or less as indicated above (may vary
slightly depending on the fuse type).
Amperage (A) is the parameter that is important
for allocating fuses correctly to the correspond-
ing fuse holder (in the example above: F1/T2A)
Leica ST5020
Four fuse holders, marked
F1 through F4, are located at
the rear panel of the instru-
ment, below the power sup-
ply sockets.
Check the malfunction table
on
fuse needs to be replaced.
Example:
Touch screen failure:
--> Exchange fuse F1.
Fig. 74
To replace the fuse in fuse holder F1, select the
replacement fuse marked '2A' (see
Only the fuse marked '2A' can be inserted into
fuse holder F1. The same applies for the re-
maining fuse holders F2 - F4, i.e. always make
sure the amp rating on the fuse corresponds to
the amp rating indicated above the fuse holder.
7. Troubleshooting
page 78 to find out, which
Fig. 69).
83