Standard 25
ICS
4-4
B 40-029 e 01/98
4.2 Troubleshooting
Troubleshooting is described in further detail using the following two examples:
changing the fuses, and
changing the 6 V / 20 W halogen lamp.
Further measures are summarized under 4.2.3.
4.2.1
Changing the fuses
Switch off the instrument via the on/off switch (4-1/
1
) and disconnect earth-contact plug (4-1/
4
) from
the line; if required, also disconnet flat plug (4-1/
3
) from the instrument connector (4-1/
2
).
Check line cable and instrument plugs (4-1/
3
and
4
) and exchange them, if required.
Press marked lock (4-1/
5
) in the direction of the arrow and remove fuse holder (4-1/
6
). Check fuse
inserts (4-1/
7
) for compliance with the line voltage and check whether resistance wires are OK.
for 230 V:
T 0.2 A; 250 V
for 115 V:
T 0.4 A; 250 V
Be absolutely sure that you replace defective fuse inserts. For the catalogue numbers of spare fuses
please see page 4-10 in section 4.3.
Fig. 4-1
Changing the fuses
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