Extron Electronics HSA 822M User’s Manual - Manual (Page 16)

Maintenance and Modifications
HSA 822M • Maintenance and Modifications HSA 822M • Maintenance and Modifications 3-2
CAUTION Installation and service must be performed by
authorized personnel only.
This chapter provides the following procedures:
Maintenance procedures marked with an asterisk (*)
require removing the HSA 822M from the table.
• Replacing an AAP
• Replacing the bezels
• Removing and replacing the HSA in the table (for other
maintenance procedures)*
• Adjusting the upper-level and lower-level stop point and
the manual mode release point*
• Replacing the power supply assembly and the control
board assembly*
Figure 3-1 shows the underside of the enclosure and many of
the maintenance-related features.
4
4
X
X=Do not remove.
X
4 4
3
1
3
2
5
5
6
9
8
8
7
4 ✝
Figure 3-1 — HSA 822M maintenance features
1 Control board assembly 6 Spare AAP/RJ-45 panel screws
2 Power supply assembly 7 AC power connector
3 Cable access holes 8 RJ-45 connector
4 Assembly screws ✝ 9 Control and status connector
5 Cable tie-downs X Structural screws —
Do not remove.
The screws indicated by a dagger ( ✝ ) on figure 3-1 are
accessible from the top (inside the enclosure).
Replacing an AAP
Replace one or more AAPs as follows:
1 . Activate the motor to raise the platform, and then
disconnect the AC power.
Ensure that AC power is disconnected before
servicing the HSA unit.
When AC power is removed, the platform may sink
partially down into the HSA.
2 . Remove and retain the top and bottom screws on the right
and left sides of the AAP/RJ-45 panel (figure 3-2). Lift the
panel away from the enclosure as far as the connected
cables allow and then allow the panel to dangle,
supported by its connected cables.
Remove panel.
Remove two
screws ea. side.
HSA 822 M
CO MPU TER
INP UT SELE CT AU DIO
Figure 3-2 — Removing the AAP/RJ-45 panel
The center screws on each side of the AAP/RJ-45 panel
do not fasten the AAP/RJ-45 panel in place. They secure
the AC power outlet.
CAUTION Ensure that the edges of the AAP/RJ-45 panels do
not scratch the finished surface of the top panel
flange or the furniture in which the HSA 822M is
installed when removing the panels.
3-3