HELIX C Four Manual page 22

Installation of the HELIX Digital Input Module HDM 2
It is possible to extend the HELIX C FOUR amplifier
with two optical digital inputs in SPDIF format incl.
SPDIF Direct In switches by mounting the HELIX
Digital Input Module HDM 2.
To install the module it is necessary to remove the
side panel of the C FOUR and replace it by the new
side panel that comes with the HDM 2.
Attention: Install the HDM 2 only in the designat-
ed device and its specific slot. Using the module
in other devices or slots can result in damage of
the HDM 2 module, the amplifier, the head unit /
car radio or other connected devices!
Read in the following the steps how to install the
module:
1. First disconnect the power supply (+12 V /
GND / REM) and RCA / Cinch cables from the
device.
2. Remove the acrylic cover by loosening the eight
Allen screws.
3. Then dismantle the side panel where the pow-
er supply is located by removing the two Allen
screws.
4. Prepare the module for installing it into the de-
vice. Any further mounting information will be
found in the instruction manual of the HDM 2.
5. Insert the module into the specific slot of the
device which is marked in the following picture.
Make sure that the module is installed properly.
22
6. Insert the Allen screw which is delivered with
the HDM 2 into the mounting hole of the module
and fix it carefully.
Caution: Do not overtighten the screw as this
may damage the module.
7. Fix the new side panel which is delivered with
the HDM 2 module with the Allen screws. After-
wards remount the acrylic cover, too.
8. Reconnect all connections to the device.
9. Turn on the amplifier. The digital inputs are
automatically detected by the device. Further
information about the module as well as the
SPDIF Direct In function can be found in the
instruction manual of the HDM 2 module.