powersoft KDSP Specification sheet

Tech Note’s
Number
Keep This Technical Note For Future Reference
1 Preface
It is possible to install the optional K-DSP on every K Series
amplier with serial number newer than 19062, older serial
numbers will need to be sent back to Powersoft factory for an
internal board change, please contact directly Powersoft for
further information about.
2 Powersoft KDSP upgrade kit
Powersoft DSP upgrade Kit comes as a DSP board protected
in an electrostatic shielding envelope, two brass spacers support
standoff and a kit of labels to change the name into KDSP as from
images down here.
3 Tools required
It is necessary to have a Phillips screwdriver PH 0, a Phillips
screwdriver PH 1, an M2,5/5mm nut driver, a long needle nose solid
joint pliers, an hexagonal key 2x90 as in FIGURE 2 to FIGURE 5.
4 How to perform the upgrade
1.1 KAESOP hardware installation
Disconnect amplier from the mains, if the amplier has been
connected to the mains in the last few minutes please proceed
with attention as the internal capacitors bank could be charged
and harmful!
Remove the side support steel bars, unscrewing the four bigger
screws with a Phillips PH1 screwdriver, then remove the three
screws in the centre using a smaller Phillips PH 0 screwdriver as
in FIGURE 6.
Remove the amplier cover unscrewing the nine screws (four
in the front, two in the centre and three in the rear) using a
screwdriver Phillips PH 0 as on FIGURE 7.
TECHNICAL NOTE #07 rev. 01
KDSP board installation
How to perform KDSP installation in K Series ampliers
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FIGURE 1: KDSP upgrade kit content
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FIGURE 2: Phillips PH0 screwdriver
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FIGURE 3: Phillips PH1 screwdriver
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FIGURE 4: M2,5/5mm nut driver
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FIGURE 5: Long needle nose solid joint pliers
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FIGURE 6: Amplier side view, screws
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FIGURE 7: Amplier top view, screws
© 2012 - 2013 Powersoft
powersoft_TN007_KDSPInstallation_en_v1.0

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 amplier 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, rst 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 amplier, 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 amplier!
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7railledsshouldbeofforit
isneededtodischarge
capacitorsbank
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FIGURE 8: Rail leds
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FIGURE 9: Dummy load lamp
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FIGURE 10: Discharging connectors
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FIGURE 11: Detail of discharging connectors
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FIGURE 12: Screws of the control board to be removed
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FIGURE 13: Brass spacers positioned
2

Once the K-DSP board is positioned and correctly plugged on
top of the control board, as in FIGURE 14, it is possible to screw it
back on the two brass spacers support standoff as on FIGURE 15,
using the two screws previously removed from the control board.
Please play attention not to tight too much those screws to
avoid brass spacers support standoff breakage.
Now it is possible to close the amplier with its cover, screw it
back in position, as it is possible to screw back in position the two
side support steel bars.
Once the amplier is closed it is possible to change the front
label from K to KDSP by removing the screw that close the left
front dust lter cover, as on FIGURE 16.
Once opened it’s possible to remove the old label by pulling it
out, as on FIGURE 17, and replace it with the new one certifying
the upgrade to a KDSP amplier as on FIGURE 18.
5 FIRMWARE UPDATE
Once the KDSP board has been installed it is possible to
perform the amplier rmware update to disclose the full DSP
functionality.
Turn off amplier -> insert rmware smartcard (electric
contacts facing down)->while keeping pressed the rst and
second buttons on the left of the front panel turn on the amplier
and wait about 3 to 6 seconds.
Soon after the fan test (full throttle blow), after 5 seconds that
the yellow leds on the panel will be blinking, it is possible to release
the two front panel buttons, KFRONT rmware update will start
automatically.
Please note that during KFRONT update the yellow leds will
continue to blink for about another minute. During this period
the LCD display will remain blank because the KFRONT is under
update and is unable to write on the LCD display.
IMPORTANT NOTE
fIf the KDSP is installed correctly: KDSP update will begin
after KFRONT update will be completed, showing “Updating
KDSP” with a progress bar. After a few minutes, the KDSP
update will be completed.
fIf the KDSP is NOT installed correctly: a warning message
(“START ERROR” or “KDSP board not present”) is displayed,
requiring a button press conrmation to proceed.
After KDSP update, the KCNTRL update will begin, showing
“Updating KCNTRL” with a progress bar. After a few minutes, the
KCNTRL update will be completed.
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FIGURE 14: DSP board correctly positioned
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FIGURE 15: DSP board correctly positioned and screwed
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FIGURE 16: Screw to be removed to open dust lter
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FIGURE 17: Pull out the old K label
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FIGURE 18: Stick the new KDSP label
3

After that update will appear a message asking for SHARC,
conrming with OK will start SHARC update, showing “Updating
SHARC” and a progress bar on the LCD display. The update lasts
several minutes.
At the end a message “ Firmware update completed , press OK
to restart” will indicate that the procedure has been successfully
completed, before restarting the amplier please remove the
rmware card.
To verify the correct updating go to SETUP-> HARDWARE
INFO and check that the displayed versions are exactly the same
as the ones on the rmware update smart card.
Please remember that if rmware update process stops before
its completion (for mains drop or any other problem), it is necessary
to restart it from the beginning (switching the amplier off and
back on), as it could happen that 2 different rmware versions are
present in the different boards of the amplier, causing possible
problems.
There will be no amplier damage if the rmware update
will be interrupted, it will be just necessary to re-start the full
procedure by the beginning.
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© 2012 - 2013 Powersoft powersoft_TN007_KDSPInstallation_en_v1.0