CEM40 Board Replacement
May 17, 2019
Due to the internal cable wiring, there will be some disassemble effort to perform this inspection.
Tool needed: Metric Allen wrench set
1. Rotate the mount RA axis to horizontal position as
shown below. Lock the Gear Switch. Use a 2.5mm
Allen wrench to release two DEC motor plastic
cover screws. Remove the DEC cover.
2. Remove the plastic cover. Check the 4-wire plug
marked Main on the side. Make sure it is plugged in
firmly. Power on the mount to see if the DEC
connection error disappears.
3. Remove the RA/Main board cover.
4. Unplug the RA board from the main board.
5. Unplug the cables from the RA board and PEC
encoder cable from the mount. （EC model has a 6-
wire encoder cable）
6. Remove the RA motor by release three socket
screws.
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