Before operating for the installation of the K-DSP board it is
necessary to check if the rails are completely discharged: leds in
FIGURE 8 should be off, this should happen after about 15 minutes
that the amplifier has been switched off and disconnected from
the mains.
If the leds are still on it is suggested to discharge the capacitors
bank by connecting a lamp of at least 40 W / 230 V, best if 60 W /
230 V (FIGURE 16) to the connectors positioned as on FIGURE 9 and
FIGURE 10 to avoid harmful current stored in the capacitors bank.
Keeping a leg of the dummy load on one of the two “GND”
connectors, first touch with the other leg one of the right “+VCC”
connectors, and then one of the left “-VCC” connectors (as
showed in FIGURE 11).
Locate the control board, positioned in the front left corner
of the amplifier, as in FIGURE 12 and remove the screws of the
control board with a Phillips PH0 screwdriver.
Screw on the same holes the brass spacers support standoff
as on FIGURE 13.
Be careful in both removing the screws and positioning the
brass spacers support standoff: help yourself with a long needle
nose solid joint pliers for avoiding any piece to fall under control
board.
Carefully position the DSP board on top of the control board,
pay particular attention to the four connectors of both boards,
they have to mate perfectly, do not press the board until you’re
sure that connectors are exactly in position or it’s possible to
damage the amplifier!
7
rail leds should be off or it
is needed to discharge
capacitors bank
FIGURE 8: Rail leds
FIGURE 9: Dummy load lamp
FIGURE 10: Discharging connectors
FIGURE 11: Detail of discharging connectors
FIGURE 12: Screws of the control board to be removed
FIGURE 13: Brass spacers positioned
2
