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Operating Manual V 1.1 – 01/2010
6.3 Replacing components
6.3.1 Fuse
If the instrument fails to function completely, first check for power avail-
ability at the power outlet. The instrument fuse(s) located at the rear of
the instrument should be checked next. Before removing the fuse, pull the
POWER PLUG OUT OF THE SOCKET. The fuse and its holder are removed
by lifting the tab in the fuse drawer that is located directly above the plug
and pulling the drawer out of the socket.
Check to see if the filament within the glass tube of the fuse is intact. If
not, replace with fuse referenced below, two of which are supplied in
the accessory package. Before reconnecting the power cord, check the
instrument for any obvious cause of the burnt fuse and make the appropri-
ate correction.
Model # Qty Fuse
VT1000 A,
110V
1 39GMA-2A
VT1000 A,
220V
2 39F-1A
6.3.2 LED light
If the LED light fails to turn on or flickers when operating, replacement is
necessary. The LED light is located under the lamp assembly housing, di-
rectly behind the glass magnifier.
BE ABSOLUTELY CERTAIN TO UNPLUG THE POWER CABLE before
removing the lamp.
The lamp can be removed from its mounting sockets by first removing the
end cap of the lamp housing opposite to the socket. Once the socket is
removed, the lamp tube can be removed by pulling the lamp straight out of
the socket.
6. Cleaning and Maintenance