Leica Biosystems ST4020 - Manual (Page 43)

43 Leica ST4020
• Check whether there is a general power failure (no power).
• Check whether the power cord is inserted correctly into the power socket and whether the
power socket is switched on, if applicable.
• Check whether the power cable is plugged into the socket on the instrument properly.
• Check whether the power switch is switched on correctly.
• Some instrument malfunctions / failures are caused by defective fuses.
Check whether one or both secondary fuse(s) is/are faulty.
7.4 Power Failure
7. Troubleshooting
Before replacing a fuse, always switch the instrument off and unplug from power
supply. Defective fuses may be replaced only with the replacement fuses supplied
together with the instrument.
Before plugging the power cable
back in and switching on the instru-
ment, you must have identified and
corrected the cause of the faulty
fuse.
To replace a fuse, proceed as follows:
• With a screwdriver (30), carefully push out
the Hood (34) of the fuse insert (31) at rear of
instument and and open it upwards.
(Fig. 33 ).
• Remove the fuse insert (31) – it contains two
fuses (32) on its rear.
• Check that the thin wire (33) in the glass
capillary of a fuse is intact. If not, the fuse
must be replaced.
• Insert the fuse insert with the two fuses and
start up the instrument again.
Fig. 33
30
33
34
31
32