Valleylab CUSA EXcel-8 - Remove the Control Panel Overlay; Remove the Display PCB; Remove the Machine Control PCB

Control Head Components
Remove the Machine Control PCB
Notice
Electrostatic Sensitive Devices This unit contains electrostatic sensitive
components. When repairing the system, work at a static control workstation.
Wear a grounding strap when handling electrostatic sensitive components.
Handle circuit boards by their nonconductive edges. Use an antistatic container
for transport of electrostatic sensitive components and circuit boards.
1. Attach an ESD wrist strap, then disconnect the 50-pin ribbon cable
from the Machine Control PCB (J1). Refer to Figure 11-9.
2. Remove five screws (M4 Phillips) from the Machine Control PCB.
3. Remove the Machine Control PCB from the control panel assembly.
Remove the Control Panel Overlay
Four snap-in standoffs fasten the overlay to the control panel assembly.
1. To gain access to the standoffs within the control panel assembly,
remove the Machine Control PCB.
2. With your fingertips, squeeze the spring-loaded flanges on the
standoffs to retract them.
3. With the flanges retracted, push the standoffs out of the control panel
assembly to release the overlay.
Remove the Display PCB
1. Remove the control panel overlay.
2. Remove four screws and four lock washers (M4 Phillips) from the
display PCB chassis.
3. Tilt the display PCB and chassis backward at the top. Lift the display
PCB and chassis from the control panel bezel, being careful to make
sure the silicon buttons clear the bezel.
4. Remove the display PCB from the chassis (refer to Figure 11-11):
a. Remove eight screws (M4 Phillips) from the display PCB.
b. Lift the display PCB from the chassis.
11-18
CUSA EXcel-8 System Service Manual
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