83
Leica ST5020
7.4 Replacing the secondary fuses
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
page 78
to find out, which
fuse needs to be replaced.
Example:
Touch screen failure:
--> Exchange fuse
F1
.
Fig. 74
Selecting the correct replacement fuse
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
/T
2A
)
To replace the fuse in fuse holder
F1
, select the
replacement fuse marked '
2A
' (see
Fig. 69
).
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.
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!
7. Troubleshooting
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.
