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Main PCB
•
CAUTION!! Always observe ESD precautions when handling the main PCB. While the main PCB
is resistant to electrostatic discharge, the potential to damage electronic components still exists.
•
CAUTION!! Do not handle the main PCB without turning the machine off. While the voltage
input to the PCB is only approximately 36 volts DC, handling the PCB will short the components
out while the PCB is still energized and damage the PCB severely.
Replace the main PCB only after electrical troubleshooting procedures have eliminated other components
as the cause of machine failure or the main PCB is obviously defective. This procedure can be safely per-
formed by the customer maintenance personnel as long as required precautions are observed. Before re-
placing the Main PCB, it is strongly recommended that the situation be discussed with Technical Support
as other causes may cause machine failure that looks like a Main PCB fault when it really might be an
electrical short in a harness, a software corruption issue, or the like.
Figure 1 - Main PCB Installed
Replacement Parts Required:
• Main PCB
Replacement Procedures:
1. Turn the machine OFF.
2. Let the machine sit without touching the PCB and place your hand somewhere on the machine
body (not the Main PCB) to dissipate any residual static in the machine or your body.
•
CAUTION!! Use extreme care not to drop metallic objects, tools, or other conductive material
on the Main PCB when you have the base cover removed. If you drop such objects on the Main
PCB, it can severely damage the electronics which will be very expensive to repair.
3. Remove cover for the main PCB.
a. Remove the 4 screw(s) that hold the main PCB cover in place.
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