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Velleman-Kit K8020 Illustrated Assembly Manual page 21

High-end valve control amplifier

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q Now carefully mount the front panel, us-
ing two M4 Allen screws. Check the posi-
tion of the LED's.
q Check if the potentiometer turns smoothly
without touching the front panel, other-
wise correct his position or the position of
the front panel.
F
Use the supplied Allen wrench
q Remove the front panel and fix the nuts of the potentiometer bracket.
q Remove the PCB from the enclosure and solder the potentiometer connec-
tions.
IMPORTANT:
q Slide an M3 hexagonal screw into the profile
side. Position the screw about in the center of
the profile.
q Again mount the pcb into the enclosure.
q Fix the pcb using a 2cm (0.8")
spacer at the position next to
SK07 and use 5mm spacers to
fix the other two positions.
Measure, using an ohm meter
(or continuity beeper) if the
2cm spacer is electrically con-
nected to the ground wire
(yellow green wire). If not, re-
check if the paint of the alumi-
num is correctly removed.
q Mount the left channel PCB onto
the spacers, check that the con-
nector is correctly inserted. Fix the
PCB using five 6mm M3 screws.
FIG. 6
FIG. 7
Final assembly
FIG. 4
FIG. 5
SPACER
21

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