GE Ettan IPGphor 3, Instrument User Manual

Page: 52 / 64

4
Care and maintenance
52
Ettan IPGphor 3 Instrument User Manual 11-0034-58 Edition AB
4.3 Replacing fuses
Fig 4-1. The mains power module is located on the rear panel.
To replace the fuse:
1 Open the fuse compartment by inserting a small flat-blade screwdriver into
the slot at the top of the power module. Twist the screwdriver 1/8 – turn to
release the cover, then pull out the hinged compartment, which opens out.
2 Insert the screwdriver above the arrow on one fuse cassette, catch the
cassette end, and slowly slide it completely out of the module.
3 Pull the fuse out of its cassette and inspect. If the fuse element is burned or
broken, replace the fuse with an identical type. If the fuse appears to be
intact, check it with a multi-meter. (A reading of 1 ohm or less indicates the
fuse is still usable.)
4 After placing a good fuse into the cassette, slide it into the power module,
making sure the arrow on the cassette points to the right (in the same
direction as the guide arrows on the inside of the compartment door).
WARNING! Fuses protect equipment by disconnecting loads too large for the
instrument’s circuit design, so it is imperative that fuses are replaced only with
fuses of identical rating. The mains power module, located at the back of the
instrument, contains two input mains fuses which are the same for all models:
T2.5 AL 250V, 5
×
20 mm.
insert screwdriver
in this notch to
open the cover.
mains power
switch
hinged cover
insert the
screwdriver blade
behind the arrow
to pull the cassette
completely out.
CAUTION! Turn the mains power supply switch off and detach the power cord
before replacing input mains fuses!