Extron Electronics HSA 822M User’s Manual - Manual (Page 22)

Maintenance and Modifications, cont’d
HSA 822M • Maintenance and Modifications HSA 822M • Maintenance and Modifications
Setting the Manual Release Switch
This switch’s position is properly set in the factory.
The manual release switch sets the amount of pressure needed
to activate the press-to-activate feature. If the switch is set too
low, you may have to push too hard on the platform. If the
switch is set too high, the drive mechanism may activate
sporadically.
It is unlikely that the position of the manual release
switch will ever need adjustment.
Set the sensitivity of the release as follows:
1 . Remove the surface mount enclosure from the table. See
“Removing and Replacing the Enclosure”, steps 1 through
12
. Place the enclosure on a horizontal surface. To protect
the finish, place the enclosure on a soft cloth. Let the AC
and control and status connectors (figure 3-1 on page 3-2,
items
7 and 9 ) overhang the edge of the surface so that
they are accessible.
2 . Plug in AC power and the control and status device.
3 . Activate the motor to raise the platform. Leave AC power
applied to the HSA.
Do not reach tools or your hands into the area
behind the AC connectors or into the vicinity of the
power supply.
4 . Locate the manual release switch assembly (figure 3-9)
inside the enclosure.
Manual
Release
Switch
Assembly
RJ-45
Connectors
Manual
Release
Switch
Manual
Release
Set Screw
Manual
Release
Lock Nut
Lower
Limit
Set Screw
Figure 3-9 — Location of manual release switch
assembly (seen from the side)
The manual release switch looks similar to, but not
exactly like the upper limit switch shown on page 3-12.
5 . Loosen the manual release lock nut.
6 . Rotate the manual set screw:
Clockwise to make the manual release more sensitive.
Counterclockwise to make the manual release less
sensitive (you must push harder to activate the press-to-
activate feature).
7 . Press on the platform to activate the press-to-activate
function. If necessary, repeat step 6.
Pin 5 of the control and status connector (figure 3-1 on
page 3-2, item
9 ) must be tied to ground to enable the
press-to-activate function.
8 . Tighten the manual release lock nut.
9 . Disconnect the power and control and status connectors.
10 . Reinstall the surface mount enclosure. See “Removing and
Replacing the Enclosure”, steps 14 through 20.
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