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Velleman-Kit K8020 Illustrated Assembly Manual page 19

High-end valve control amplifier

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q Remove the pcb and use a
knife or a screwdriver to
scratch the paint from the alu-
minum fixation, from the hole
closest to the back end. This
fixation will be used later to
connect the ground and
earth.
q Mount the 3, 5mm
(0.14") spacers like in
the drawing. Using
three hexagonal
screws and a
washer. Do not tighten
the spacers yet.
q Position the PCB in the enclosure and check if the position of the spacers is
correct, if so, remove the PCB and tighten the spacers.
q Using an ohmmeter, measure between the edge of the aluminum profile and
the back spacer, if there is a good electric contact (0 ohm). If not, repeat the
above step to remove the paint under the spacer.
FIG. 6
5mm M3 spacer
Enclosure preparation
FIG. 7
M3 hex. nut
Washer
FIG. 8
19

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