Mains lead and fuse replacement
The mains cable stows on the back of the unit with a wind and clip feature. The mains cable retainer
can be removed to allow the cable to be stored separately. Simply remove the screw and retainer from
the base of the unit. The IEC cable is now detachable. In the unlikely event of the fuse blowing, the
retainer and mains cable must be removed to gain access to the fuse carrier.
There is also an internal fuse, rated at T2A, which protect the low impedance (high
power) output.
If the internal fuse blows, there will be no low impedance output, but the high
impedance output will continue to work. Disconnect the instrument from the mains.
Remove three screws from the plastic base and detach it. The circuit board is fixed
to the front panel and the fuseholder is before half way down. It is a rectangular
block, with a clip that can be removed using a fingernail to release the fuse. The
replacement fuse (T2A) clicks into the holder with the clip.
C
leaning
The front panel membrane conceals and protects switches and LEDs. It may be wiped clean using a damp cloth.
Be sure to disconnect the unit from the mains before cleaning, and do not use any abrasive cleaners or organic
solvents.
Periodic testing:
Check the mains lead and plugs at both ends for any damage.
Periodically check the earth bonding and insulation, by performing a Portable Appliance Test (PAT). Most
schools and local authorities have a regular schedule for such testing.
Check that the fuse in the mains plug (5A recommended) and the two fuses (active and spare) in the IEC socket
on the back panel are all of the correct rating.
version G85793 2017
