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Z Home Harness
The z home harness connects the trimmer home optical sensor and the z-index PCB to the Main PCB at
connector location J32.
Replacement Part Needed:
• harness, trimmer/z home
• twist-lock cable ties (available at most hardware stores in the electrical section)
Replacement Procedures:
1. Turn the machine OFF.
2. Remove only the back screws of both upper arm covers.
3. Remove the upper arm back cover and the lower arm rear cover.
•
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.
4. Remove the base cover.
5. Remove any twist-lock cable ties that bundle the trimmer/z home harness to adjacent ones.
Figure 1 - Connection to Z-Index PCB
6. Cut the cable tie at the z-index PCB that holds the connector in the socket (if tied) and disconnect
the z-home lead from the z-index PCB.
Figure 2 - EMI Cover over Main Board
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