Wunder Audio CM7 - Manual (Page 4)

It is advisable to check the AC voltage of the outlet prior to connecting
the CM7 to AC power.
Changing the AC voltage selector (110/240)
Use a flat-blade screwdriver to unscrew the lid to the PSU and remove.
You will see a small chrome toggle switch located inside the unit directly
next to the large AC transformer.
To set the switch to 115V, toggle the switch towards the transformer. To
set the switch to 230V, toggle the switch away from the transformer.
Warning: Connecting the CM7 to the wrong AC voltage may destroy the
unit and cause fire and/or electric shock.
Replacing the Fuse
The fuse protecting the primary circuit is located outside the PSU.
Unscrew the black fuse cover to open the fuse compartment. Replace the
fuse with a new fuse of the same type (T 500 mA for 115V; 250 mA for
230V) and close the fuse compartment lid.
AC Power Connector
Especially on tour, you may need to connect the unit to a power outlet
that does not match the power connector on the supplied power cable.
Purchase a matching power cable locally that complies with IEC and local
safety standards and has a power connector with a chassis ground pin.
While in the same area, use this “local“ power cable only.
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