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X/Y Home PCB Replacement
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This repair requires timing and other adjustments and should be performed by an authorized
service technician.
The X-home PCB needs to be replaced when the sensors fail to detect home. This condition normally
results when the optical sensors are damaged due to mechanical interferences or incorrect adjustment.
Optical sensors should be cleaned only with compressed air. The use of any kind of solvent or cleaning
liquid will damage the sensors.
Optical sensors might also be damaged through improper torque of the mounting screws, misalignment
of the PCB, or X & Y home flags.
Figure 1 - X/Y Home PCB (Belt turned up for illustration)
WARNING!!
A small risk exists of unpredictable movement of internal parts when the optical
sensors are disconnected. This creates a risk of personal injury if parts suddenly move. Always
turn off the machine before disconnecting optical sensors.
Replacement Parts Needed
• X/Y Home PCB
Replacement Procedure
1. Turn the machine OFF.
2. Make contact with a metal part of the machine to dissipate any static build up in 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 damaged the electronics which will be very expensive to repair.
3. Remove the base cover, the left arm cover and the back screw from the right arm cover, the upper
arm back cover, and the lower arm rear cover.
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