8 Upkeep and Cleaning
C58IB004EN-D
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8.4 Exchanging Electronic Compo-
nents
8.4.1 Switching off the instrument
1. Switch off the CCU 100 by using the power
switch on the front side of the instrument.
2. Unplug all cables from the rear side of the
instrument.
8.4.2 Checking and Replacing Main Fuses
Two mains fuses are located in the fuse box (1) on
the backside of the CCU 100.
Exchange the mains fuse as follows:
1. Switch off CCU 100 and disconnect all cables
from the rear side.
2. Use a small screw driver to push out the fuse
holder on both sides.
3. Press the plastic bracket together and take the
fuses out.
4. Check the fuse or exchange the defective fuse.
(The two mains fuses are made of ceramic.
Spec.: 2 x T 6.3 A)
5. Put the fuse box back into the cavity of the
power supply.
CAUTION
High voltage
CCU 100 contains electrical components which
may carry dangerous voltage. Always switch off
the CCU 100 and disconnect it from mains
before you open the housing.
Do not operate the CCU 100 when the housing
is open.
CAUTION
High voltage
Make sure that BEFORE performing any ser-
vice/maintenance work of the CCU 100, the
instrument is disconnected from the mains sup-
ply.
Only use the specified fuse types
NOTICE
Risk of damage.
Service and/or maintenance procedures which
involve checking and replacing fuses may only
be performed by authorized service personnel.
NOTICE
Risk of damage.
Only use the specified fuse types to avoid dam-
age.
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