Modifying The Compellor (All Models) For Input Grounding - Aphex COMPELLOR 300 Operating Manual

8.4 Modifying the COMPELLOR (All Models) for
Input Grounding
In order to avoid ground loops, the input stage of COMPELLOR is floated.
However, under certain situations you may want to tie the audio ground to
the chassis. Perform the following steps to modify the input grounding:
1.
With power off, remove the top cover.
2. Locate R101 on the upper right-side of the (lower) Audio Board(s). This
board is acccessible without removing the ( top) Display Board.
3. Solder one end of an insulated buss wire to R101, as shown in Fig. 8-5.
4. Connect the other end of the buss wire to the nearest Phillips screw that
holds the Audio Board to the chassis.
5. Replace the cover and restore power. As a suggestion, write down on a
label the date, and that Audio Ground is tied to the chassis. Post it on the
COMPELLOR's front or back panel to inform users of your modification.
R101
.............. ....••••••••Veeedk
Fig. 8-5. Partial simplified
view of Audio Board
(component side). Solder
one end of an insulated
buss wire to R101 pad and
connect other end to the
nearest Phillips screw (that
holds board to chassis).
ze
-
f e*
¡.. ..
f
n.
\
.......
bar
Circuit Modifications 8-7